1. (1) Each Community Water System in existence as of September 18, 1998, must deliver its first consumer confidence report to its customers by October 19, 1999, its second report by

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July 1, 2000, and subsequent reports by July 1 annually thereafter. The first report must contain data collected during, or prior to, calendar year 1998, as provided in 310 CMR 22.16A(4)(h). Each report thereafter must contain data collected prior to or during the previous calendar year as specified at 310 CMR 22.16A(4)(h).

1. (2) Each Community Water System established after January 1, 1999, must deliver its first

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consumer confidence report to its customers by July 1 of the year after its first full calendar year in operation and annually thereafter.

1. (3) A Public Water System that sells or provides water to another Community Water System shall deliver the applicable information required at 310 CMR 22.16A(4), to the buyer or receiving system:

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   1. (a) no later than April 19, 1999, by April 1, 2000, and by April 1 annually thereafter, or
   2. (b) on a date mutually agreed upon by the seller and the purchaser, and specifically included in a written contract between the parties.

2. (4) Content of the Reports. Each Community Water System must provide to its customers an annual report that contains the information specified in 310 CMR 22.16A(4).

   1. (a) Each report must identify the source(s) of the water delivered by the Community Water System by providing information on:

      1. 1. The type of the water: e.g., Surface Water, Groundwater; and
      2. 2. The commonly used name and the Department's source water identification number (if any) and location of the body (or bodies) of water.
   2. (b) If a source water assessment has been completed, the report must notify consumers of the availability of this information and the means to obtain it. In addition, the Public Water Systems are encouraged to highlight in the report significant sources of contamination in the source water area if they have readily available information. Where a system has received a source water assessment from the Department, the report shall include a brief summary of the Public Water System's susceptibility to potential sources of contamination, using language provided by the Department.

   3. (c) Each report must include the following definitions for the purpose of 310 CMR 22.16A:

      1. 1. Maximum Contaminant Level Goal or MCLG. The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.
      2. 2. Maximum Contaminant Level or MCL. The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
   4. (d) A report for a Community Water System operating under a variance or an exemption issued by the Department must include the following definition: Variances and Exemptions. The Department or EPA permission not to meet an MCL or a Treatment Technique under certain conditions.

   5. (e) A report that contains data on a contaminant, for which the Department or EPA regulates using any of the following terms, must include the applicable definitions for the purpose of 310 CMR 22.16A:

      1. 1. Treatment Technique. A required process intended to reduce the level of a contaminant in drinking water.
      2. 2. Action Level. The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a water system must follow.
      3. 3. Maximum Residual Disinfectant Levels Goal or MRDLG. The level of a drinking water disinfectant below which there is no known or expected risk to health MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
      4. 4. Maximum Residual Disinfectant Level or MRDL. The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

   6. (f) Information on Detected Contaminants. 310 CMR 22.16A(4) specifies the requirements for information to be included in each report for contaminants subject to mandatory monitoring (except Cryptosporidium). It applies to:

      1. 1. Contaminants subject to an MCL, Action Level, Maximum Residual Disinfectant Level or Treatment Technique (regulated contaminants);
      2. 2. Contaminants for which monitoring is required by 310 CMR 22.07C (unregulated contaminants); and
      3. 3. Disinfection by-products or microbial contaminants for which monitoring is required by 40 CFR 141.142 and 141.143, except as provided at 310 CMR 22.16A(5)(a), and which are detected in the finished water.
   7. (g) The data relating to these contaminants must be displayed in one table or in several adjacent tables. Any additional monitoring results which a Community Water System chooses to include in its report must be displayed separately.

   8. (h) The data must be derived from data collected to comply with EPA and Department monitoring and analytical requirements during calendar year 1998 for the first report and subsequent calendar years thereafter except that:

      1. 1. Where a system is allowed to monitor for regulated contaminants less often than once a year, the table(s) must include the date and results of the most recent sampling and the report must include a brief statement indicating that the data presented in the report are from the most recent testing done in accordance with the regulations. No data older than five years need be included.
      2. 2. Results of monitoring in compliance with 40 CFR 141.142 and 141.143 need only be included for five years from the date of last sample or until any of the detected contaminants becomes regulated and subject to routine monitoring requirements, whichever comes first.

   9. (i) For detected regulated contaminants listed in 310 CMR 22.00, including without limitation in 310 CMR 22.16A(27), the table(s) shall contain:

      1. 1. The MCL for that contaminant expressed as a number equal to or greater than 1.0, as provided in 310 CMR 22.16A(27);
      2. 2. The MCLG for that contaminant expressed in the same units as the MCL;
      3. 3. If there is no MCL for a detected contaminant, the table must indicate that there is a Treatment Technique, Maximum Residual Disinfectant Level, or specify the Action Level, applicable to that contaminant, and the report must include the definitions for Treatment Technique, Maximum Residual Disinfectant Level and/or Action Level, as appropriate, specified at 310 CMR 22.16A(4)(e);

      4. 4. For contaminants subject to an MCL, except Turbidity and E. coli, the highest contaminant level used to determine compliance with 310 CMR 22.00 and the range of detected levels, as follows:

         1. a. When compliance with the MCL is based on a single sample or the average of an initial and a confirmation sample: the highest detected level or average at any Sampling Point and the range of detected levels of all Sampling Points expressed in the same units as the MCL.
         2. b. When compliance with the MCL is determined annually or less frequently: the highest detected level at any Sampling Point and the range of detected levels expressed in the same units as the MCL.
         3. c. When compliance with the MCL is determined by calculating a Running Annual Average of all samples taken at a monitoring location: the highest average of any of the monitoring locations and the range of all Sampling Points expressed in the same units as the MCL. For the MCLs for TTHM and HAA5 in 310 CMR 22.07E(1)(c), Suppliers of Water shall include the highest Locational Running Annual Average for TTHM and HAA5 and the range of individual sample results for all monitoring locations expressed in the same units as the MCL. If more than one location exceeds the TTHM or HAA5 MCL, the Supplier of Water shall include the Locational Running Annual Averages for all locations that exceed the MCL.
         4. d. When compliance with the MCL is determined on a system-wide basis by calculating a Running Annual Average of all samples at all monitoring locations: the average and range of detection expressed in the same units as the MCL. The Supplier of Water shall include individual sample results for the IDSE conducted under 310 CMR 22.07F when determining the range of TTHM and HAA5 results to be reported in the annual consumer confidence report for the calendar year that the IDSE samples were taken.
         5. e. When rounding of results to determine compliance with the MCL is allowed by 310 CMR 22.00, rounding shall be done prior to multiplying the results by the factor listed in 310 CMR 22.16A(27).

      5. 5. For Turbidity.

         1. a. When it is reported pursuant to 310 CMR 22.08, the highest average monthly value.
         2. b. When it is reported pursuant to the requirements of 310 CMR 22.20A(2), the highest monthly value. The report shall include an explanation of the reasons for measuring Turbidity.

         3. c. When it is reported pursuant to 310 CMR 22.20A(4), 22.20D or 22.20F, the highest single measurement and the lowest monthly percentage of samples meeting the Turbidity limits specified in 310 CMR 22.20A(4), 22.20D or 22.20F for the Filtration technology being used. The report shall include an explanation of the reasons for measuring Turbidity.

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      6. 6. For Lead and Copper. For each contaminant, the 90 percentile value of the most recent round of sampling, and the number of sampling sites exceeding the Action Level.

      7. 7. For Total Coliform analytical results until March 31, 2016.

         1. a. The highest monthly number of total coliform-positive samples for Public Water Systems collecting fewer than 40 samples per month; or
         2. b. The highest monthly percentage of positive samples for Public Water Systems collecting at least 40 samples per month.
      8. 8. For E. coli: the total number of E. coli-positive samples; and
      9. 9. The likely source(s) of detected contaminants to the best of the Supplier of Water's knowledge. Specific information regarding contaminants may be available in Sanitary Surveys and source water assessments, and should be used when available to the Supplier of Water. If the Supplier of Water lacks specific information on the likely source, the report shall include one or more of the typical sources for that contaminant listed in 310 CMR 22.16A(27) that is most applicable to the system.
   10. (j) If a Community Water System distributes water to its customers from multiple hydraulically independent Distribution Systems that are fed by different Raw Water sources, the table should contain a separate column for each service area and the report should identify each separate Distribution System. Alternatively, systems could produce separate reports tailored to include data for each service area.
   11. (k) The table(s) must clearly identify any data indicating violations of MCLs, MRDLs or Treatment Techniques and the report must contain a clear and readily understandable explanation of the violation including: the length of the violation, the potential adverse health effects, and actions taken by the system to address the violation. To describe the potential health effects, the system must use the relevant language in 310 CMR 22.16A(27).
   12. (l) For detected unregulated contaminants for which monitoring is required (except Cryptosporidium), the table(s) must contain the average and range at which the contaminant was detected. The report may include a brief explanation of the reasons for monitoring for unregulated contaminants. The report may also include health risk information which may be obtained from the Drinking Water Program's Consumer Confidence Report guidance available on the MassDEP website or by contacting the Drinking Water Program. Drinking Water Contaminant Human Health Effects Information is also available on USEPA's website.

3. (5) Information on Cryptosporidium, Radon, and other Contaminants.

   1. (a) If the system performed any monitoring for Cryptosporidium, including monitoring performed to satisfy the requirements of 40 CFR 141.143, which indicates that Cryptosporidium may be present in the source water or the finished water, the report must include:

      1. 1. A summary of the results of the monitoring; and
      2. 2. An explanation of the significance of the results.

   2. (b) If the system performed any monitoring for radon which indicates that radon may be present in the finished water, the report must include:

      1. 1. The results of the monitoring; and
      2. 2. An explanation of the significance of the results.

   3. (c) If the system performed additional monitoring which indicates the presence of other contaminants in the finished water, the Public Water System is strongly encouraged to report any results which may indicate a health concern. The Department considers detects above a proposed MCL or health advisory level to indicate possible health concerns. For such contaminants, the Department recommends that the report include:

      1. 1. The results of the monitoring; and
      2. 2. An explanation of the significance of the results noting the existence of a health advisory or a proposed regulation.

4. (6) In addition, to the requirements of 310 CMR 22.16A(4)(k), the report must note any violation that occurred during the year covered by the report of a requirement listed in 310 CMR 22.16A(6)(a) through (g), and include a clear and readily understandable explanation of the violation, any potential adverse health effects, and the steps the system has taken to correct the violation.

   1. (a) Monitoring and reporting of compliance data;
   2. (b) Filtration and Disinfection. For systems which have failed to install adequate Filtration or Disinfection equipment or processes, or have had a failure of such equipment or processes which constitutes a violation, the report must include the following language as part of the explanation of potential adverse health effects: Inadequately treated water may contain disease-causing organisms. These organisms include bacteria, Viruses, and parasites which can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.
   3. (c) Lead and Copper Control. For systems which fail to take one or more actions prescribed by 310 CMR 22.06B(1)(d)(1), (3), (4) or (5), the report must include the applicable language of 310 CMR 22.16A(27) for lead, copper, or both.
   4. (d) Treatment Techniques for Acrylamide and Epichlorohydrin. For systems which violate the requirements of 310 CMR 22.04(10), the report must include the relevant language from 310 CMR 22.16A(27).
   5. (e) Recordkeeping of compliance data.
   6. (f) Special monitoring requirements prescribed by 310 CMR 22.07C and 22.06A; and
   7. (g) Violation of the terms of a Variance, an Exemption, or an administrative or judicial order.

5. (7) Variances and Exemptions. If a system is operating under the terms of a Variance or an Exemption issued under 310 CMR 22.13, 22.13A or 22.14, the report must contain:

   1. (a) An explanation of the reasons for the Variance or Exemption;
   2. (b) The date on which the Variance or Exemption was issued;
   3. (c) A brief status report on the steps the system is taking to install treatment, find alternative sources of water, or otherwise comply with the terms and schedules of the Variance or Exemption; and
   4. (d) A notice of any opportunity for public input in the review, or renewal, of the Variance or Exemption.

6. (8) Additional Information.

   1. (a) The report must contain a brief explanation regarding contaminants which may reasonably be expected to be found in drinking water including bottled water. This explanation may include the language in 310 CMR 22.16A(8)(a)1. through 3., or systems may use their own comparable language with Department approval. The report also must include the language of paragraph 310 CMR 22.16A(8)(a)4.

      1. 1. Sources of drinking water (both tap water and bottled water) include rivers, lakes, streams, ponds, reservoirs, springs, and wells. As water travels over the surface of the land or through the ground, it dissolves naturally occurring minerals and, in some cases, radioactive material, and can pick up substances resulting from the presence of animals or from human activity.

      2. 2. Contaminants that may be present in source water include:

         1. a. Microbial contaminants, such as Viruses and bacteria, which may come from sewage treatment plants, septic systems, agricultural livestock operations, and wildlife.
         2. b. Inorganic contaminants, such as salts and metals, which can be naturally occurring or result from urban stormwater runoff, industrial or domestic wastewater discharges, oil and gas production, mining or farming.
         3. c. Pesticides and herbicides, which may come from a variety of sources such as agriculture, urban stormwater runoff, and residential uses.
         4. d. Organic chemical contaminants, including synthetic and volatile organic chemicals, which are by-products of industrial processes and petroleum production, and can also come from gas stations, urban stormwater runoff, and septic systems.
         5. e. Radioactive contaminants, which can be naturally-occurring or be the result of oil and gas production and mining activities.
      3. 3. In order to ensure that tap water is safe to drink, the Department and EPA prescribe regulations which limit the amount of certain contaminants in water provided by public water systems. FDA and 105 CMR 570.000: The Manufacture, Collection, and Bottling of Water and Carbonated Nonalcoholic Beverages establish limits for contaminants in bottled water which must provide the same protection for public health.
      4. 4. Drinking water, including bottled water, may reasonably be expected to contain at least small amounts of some contaminants. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the Environmental Protection Agency's Safe Drinking Water Hotline (800-426-4791) or your local water supplier.
   2. (b) The report must include the PWSID#, address, telephone number of the owner, operator, or designee of the Community Water System as a source of additional information concerning the report.
   3. (c) In communities with 10% or greater, or greater than 1000 people (whichever is lesser) of non-English speaking residents, the report must contain information in the appropriate language(s) regarding the importance of the report. In communities serving 25% or greater of non-English speaking residents, the report must contain a statement in the appropriate language(s) which includes a telephone number or address where such residents may contact the system to obtain a translated copy of the report or assistance in the appropriate language.
   4. (d) The report must include information (e.g., time and place of regularly scheduled board meetings) about opportunities for public participation in decisions that may affect the quality of the water.
   5. (e) The systems may include such additional information as they deem necessary for public education consistent with, and not detracting from, the purpose of the report.
   6. (f) The Public Water System shall include any additional language as specified by the Department.

   7. (g) Systems Required to Comply with 310 CMR 22.26.

      1. 1. Any groundwater system that receives notice from the Department of a Significant Deficiency or notice from a laboratory of a fecal indicator-positive groundwater source sample that is not invalidated by the Department under 310 CMR 22.26(3)(d) must inform its customers of any Significant Deficiency that is uncorrected at the time of the next report or of any fecal indicator-positive groundwater source sample in the next report. The system must continue to inform the public annually until the Department determines that particular Significant Deficiency is corrected or the fecal contamination in the groundwater source is addressed under 310 CMR 22.26(4)(a). Each report must include the following elements.

         1. a. The nature of the particular Significant Deficiency or the source of the fecal contamination (if the source is known) and the date the Significant Deficiency was identified by the Department or the dates of the fecal indicator-positive groundwater source samples;
         2. b. If the fecal contamination in the groundwater source has been addressed under 310 CMR 22.26(4)(a) and the date of such action;
         3. c. For each Significant Deficiency or fecal contamination in the groundwater source that has not been addressed under 310 CMR 22.26(4)(a), the Department-approved plan and schedule for correction, including interim measures, progress to date, and any interim measures completed; and
         4. d. If the system receives notice of a fecal indicator-positive groundwater source sample that is not invalidated by the Department under 310 CMR 22.26(3)(d), the potential health effects using the health effects language of 310 CMR 22.16A(27).
      2. 2. If directed by the Department a system with significant deficiencies that have been corrected before the next report is issued must inform its customers of the Significant Deficiency, how the deficiency was corrected, and the date of correction under 310 CMR 22.16A(8)(g)1.

   8. (h) Systems Required to Comply with the Revised Total Coliform Rule (310 CMR 22.05).

      1. 1. Any Supplier of Water required to perform a Level 1 Assessment or a Level 2 Assessment that is not due to an E. coli MCL violation shall include in the report the language provided in 310 CMR 22.16A(8)(h)1.a.; and as appropriate 310 CMR 22.16A(8)(h)1.b. and c., inserting the appropriate information where indicated; and the language provided in 310 CMR 22.16A(8)(h)1.d.i. and ii., if appropriate.

         1. a. Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially harmful, waterborne pathogens may be present or that a potential pathway exists through which contamination may enter the drinking water distribution system. We found coliforms indicating the need to look for potential problems in water treatment or distribution. When this occurs, we are required to conduct assessment(s) to identify problems and to correct any problems that were found during these assessments.
         2. b. During the past year we were required to conduct [INSERT NUMBER OF LEVEL 1 ASSESSMENTS] Level 1 assessment(s). [INSERT NUMBER OF LEVEL 1 ASSESSMENTS] Level 1 assessment(s) were completed. In addition, we were required to take [INSERT NUMBER OF CORRECTIVE ACTIONS] corrective actions and we completed [INSERT NUMBER OF CORRECTIVE ACTIONS] of these actions.
         3. c. During the past year [INSERT NUMBER OF LEVEL 2 ASSESSMENTS] Level 2 assessments were required to be completed for our water system. [INSERT NUMBER OF LEVEL 2 ASSESSMENTS] Level 2 assessments were completed. In addition, we were required to take [INSERT NUMBER OF CORRECTIVE ACTIONS] corrective actions and we completed [INSERT NUMBER OF CORRECTIVE ACTIONS] of these actions.

         4. d. Any Supplier of Water that has failed to complete all the required assessments or correct all identified Sanitary Defects, is in violation of the Treatment Technique requirement and must also include one or both of the following statements, as appropriate:

            1. i. During the past year we failed to conduct all of the required assessment(s).
            2. ii. During the past year we failed to correct all identified defects that were found during the assessment.

      2. 2. Any Supplier of Water required to perform a Level 2 Assessment due to an E. coli MCL violation shall include in the report the language provided in 310 CMR 22.16A(8)(h)2.a. and b., inserting the appropriate information where indicated; and the language provided in 310 CMR 22.16A(8)(h)2.c.i. and ii., if appropriate.

         1. a. E. coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Human pathogens in these wastes can cause short-term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a greater health risk for infants, young children, the elderly, and people with severely compromised immune systems. We found E. coli bacteria, indicating the need to look for potential problems in water treatment or distribution. When this occurs, we are required to conduct assessment(s) to identify problems and to correct any problems that were found during these assessments.
         2. b. We were required to complete a Level 2 assessment because we found E. coli in our water system. In addition, we were required to take [INSERT NUMBER OF CORRECTIVE ACTIONS] corrective actions and we completed [INSERT NUMBER OF CORRECTIVE ACTIONS] of these actions.

         3. c. Any Supplier of Water that has failed to complete the required assessment or correct all identified Sanitary Defects, is in violation of the Treatment Technique requirement and shall also include one or both of the following statements, as appropriate:

            1. i. We failed to conduct the required assessment.
            2. ii. We failed to correct all sanitary defects that were identified during the assessment that we conducted.

      3. 3. If a Supplier of Water detects E. coli and has violated the E. coli MCL, then in addition to completing the table as required in 310 CMR 22.16A(4)(i)4., the Supplier of Water shall also include one or more of the following statements to describe any noncompliance, as applicable:

         1. a. We had an E. coli-positive repeat sample following a total coliform- positive routine sample.
         2. b. We had a total coliform-positive repeat sample following an E. coli-positive routine sample.
         3. c. We failed to take all required repeat samples following an E. coli-positive routine sample.
         4. d. We failed to test for E. coli when any repeat sample tests positive for total coliform.
      4. 4. If a Supplier of Water detects E. coli and has not violated the E. coli MCL, in addition to completing the table as required in 310 CMR 22.16A(4)(i)4., the Supplier of Water may include a statement that explains that although they have detected E. coli, they are not in violation of the E. coli MCL.
7. (9) Required Additional Health Information. All reports must prominently display the following language: Some people may be more vulnerable to contaminants in drinking water than the general population. Immuno-compromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly, and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers. EPA/CDC guidelines on appropriate means to lessen the risk of infection by Cryptosporidium and other microbial contaminants are available from the Safe Drinking Water Hotline (800-426-4791).

8. (10) Beginning in the report due by July 1, 2002, a Community Water System which detects arsenic at levels above 0.005 mg/L, and up to and including 0.010 mg/L:

   1. (a) Shall include in its report a short informational statement about arsenic, using language such as: While your drinking water meets EPA's standard for arsenic, it does contain low levels of arsenic. EPA's standard balances the current understanding of arsenic's possible health effects against the costs of removing arsenic from drinking water. EPA continues to research the health effects of arsenic which is a mineral known to cause cancer in humans at high concentrations and is linked to other health effects such as skin damage and circulatory problems.
   2. (b) May write its own educational statement, but only in consultation with and approval of the Department.
   3. (c) Beginning in the report due by July 1, 2002 and ending January 22, 2006, a community water system that detects arsenic above 0.010 mg/L and up to and including 0.05 mg/L shall include the arsenic health effects language prescribed by 310 CMR 22.16A(27).

9. (11) A Community Water System which detects nitrate at levels above 5 mg/l, but below the MCL:

   1. (a) Must include a short informational statement about the impacts of nitrate on children using language such as: Nitrate in drinking water at levels above 10 ppm is a health risk for infants of younger than six months old. High nitrate levels in drinking water can cause blue baby syndrome. Nitrate levels may rise quickly for short periods of time because of rainfall or agricultural activity. If you are caring for an infant you should ask advice from your health care provider.
   2. (b) May write its own educational statement, but only in consultation with and approval of the Department.

10. (12) Every report must include the following lead-specific information:

    1. (a) A short informational statement about lead in drinking water and its effects on children. The statement must include the following information: If present, elevated levels of lead can cause serious health problems, especially for pregnant women and young children. Lead in drinking water is primarily from materials and components associated with service lines and home plumbing. [NAME OF UTILITY] is responsible for providing high quality drinking water, but cannot control the variety of materials used in plumbing components. When your water has been sitting for several hours, you can minimize the potential for lead exposure by flushing your tap for 30 seconds to two minutes before using water for drinking or cooking. If you are concerned about lead in your water, you may wish to have your water tested. Information on lead in drinking water, testing, methods, and steps you can take to minimize exposure is available from the Safe Drinking Water Hotline 800-426-4791 or at http://water.epa.gov/drink/info/lead/index.cfm.
    2. (b) A system may write its own educational statement, but only in consultation with and with written approval of the Department.
11. (13) Community Water Systems that detect TTHM above 0.080 mg/l, but below the MCL listed in 310 CMR 22.07 as an annual average, monitored and calculated under the provisions of 310 CMR 22.07, must include health effects language prescribed in 310 CMR 22.16A(27).
12. (14) Report Delivery and Recordkeeping. Except as provided in 310 CMR 22.16A(20), each Community Water System must mail or otherwise directly deliver one copy of the Consumer Confidence Report to each customer.

13. (15) The Community Water System must make a good faith effort to reach consumers who do not get water bills, and are required to take a minimum of three of the following actions:

    1. (a) Post report in the lobby of apartment complexes;
    2. (b) Place an ad in a local newspaper stating where copies are available;
    3. (c) Announce availability of the consumer confidence report on local radio stations;
    4. (d) Post consumer confidence report in Town Hall;
    5. (e) Place copies of the consumer confidence report in the local public library;
    6. (f) Post a notice (in main lobby of apartment complexes) stating that the consumer confidence report is posted on a website, and give the website address;
    7. (g) Publish the report in local newspaper(s);
    8. (h) Deliver the report to community organizations.

14. (16) No later than the date the Community Water System is required to distribute the report to its customers, the system shall submit:

    1. (a) two copies of the consumer confidence report and the related attachments to the Department, one of which will be submitted to the applicable Department regional office and one will be submitted to the Boston office; and
    2. (b) a certification, using the Department's form, that the report has been distributed to customers, and that the information is correct and consistent with the compliance monitoring data previously submitted to the Department.
15. (17) No later than the date the system is required to distribute the report to its customers, each Community Water System must deliver the report to its local Board of Health or any other agency identified by the Department.
16. (18) Each Community Water System must make its reports available to the public upon request.
17. (19) Each Community Water System serving 100,000 or more persons must post its most recent report to a publicly-accessible site on the Internet.

18. (20) A Community Water System serving fewer than 10,000 persons has the option of mailing or directly delivering copies of the consumer confidence report to each customer, as provided in 310 CMR 22.16A(14), or, alternatively, such system must comply with the following notice requirements:

    1. (a) Publish the report in one or more local newspapers serving the area in which the system is located;
    2. (b) Inform the customers that the reports will not be mailed. Notification shall be either in the newspapers in which the reports are published or by a statement in a bill or newsletter; and
    3. (c) Make the reports available to the public upon request.
19. (21) A Community Water System serving 500 or fewer persons may forego the requirements of 310 CMR 22.16A(20)(a) and (b), if the system provides a notice at least once per year to its customers by mail, door-to-door delivery or by posting in an appropriate location, that the report shall be available upon request.
20. (22) Any system subject to 310 CMR 22.16A, must retain copies of its Consumer Confidence Report for no less than three years.

21. (23) A Non-community Water System shall comply with the following:

    1. (a) Post a Consumer Confidence Report within 30 days of notification from the Department that the report is available. Posting must be in a conspicuous location(s) for the public to read. The report shall remain posted until a new report is made available.
    2. (b) The Non-community Water System must retain copies of its Consumer Confidence Report for no less than three years and make it available to the public upon request.
22. (24) Consumer Confidence Reporting Requirements. (Reserved)
23. (25) Consumer Confidence Report by the Department for Any Public Water System Subject to 310 CMR 22.16A. The Department may prepare and issue to the public a report as required by 310 CMR 22.16A on behalf of the Public Water System. The Public Water System remains legally responsible for ensuring that the requirements of 310 CMR 22.16A are met. The Department reserves the right to issue on behalf of the Public Water System the report to the public when not required by 310 CMR 22.16A in the event of a significant health problem. The Public Water System shall be responsible for all fees incurred by the Department as a result of issuing such report.
24. (26) A Public Water System receiving water from a source approved by the Department under an Emergency agreement shall comply with 310 CMR 22.16A(4) for the Emergency Source unless otherwise approved in writing by the Department.

25. (27) Charts for Regulated Contaminants, Unregulated Contaminants, and Secondary Contaminants.

    1. (a) Table 1: Regulated Contaminants Chart.

Key: AL=Action Level M RDLG=M aximum Residual ppm=parts per million, or milligrams CCR=Consumer Confidence Report Disinfectant Level Goal per liter (mg/L) M CL=Maximum Contaminant Level mrem/year=millirems per year (a ppb=parts per billion, or micrograms M CLG=Maximum Contaminant Level measure of radiation absorbed by the per liter (ug/L) Goal body) ppt=parts per trillion, or nanograms M FL=Million Fibers per Liter NTU=Nephelometric Turbidity Units per liter M RDL=Maximum Residual pCi/L=picocuries per liter (a measure ppq=parts per quadrillion, or Disinfectant Level of radioactivity) picograms per liter

TT=Treatment Technique

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

M icrobiological Contaminants

1. Cryptosporidium TT - TT 0 Discharged especially Some people who drink

where water is water containing contaminated with Cryptosporidium could sewage or animal experience severe wastes. gastrointestinal effects.

2. Giardia lamblia TT - TT 0 Discharged especially Some people who drink

where water is water containing Giardia contaminated with lamblia could experience sewage or animal severe gastrointestinal wastes. effects.

3. Heterotrophic plate TT - TT N/A Heterotrophic plate Heterotrophic plate count is count count is an indicator not associated with health

method that measures effects, but is a method that a range of naturally- measures the bacterial occurring bacteria in quality of the water as an the environment. indicator of the adequacy

of water treatment.

4. Legionella TT - TT 0 Natural sources; Some people who use

multiplies in heating drinking water containing and air-conditioning Legionella could systems. experience Legionnaire's

Disease, a type of pneumonia.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

5. Total Coliform TT - TT N/A Naturally present in Coliforms are bacteria that Bacteria the environment are naturally present in the

environment and are used as an indicator that other, potentially harmful, waterborne pathogens may be present or that a potential pathway exists through which contamination may enter the drinking water distribution system. We found coliforms indicating the need to look for potential problems in water treatment or distribution. W hen this occurs, we are required to conduct assessment(s) to identify problems and to correct any problems that were found during these assessments.

1. E. coli are bacteria whose presence indicates that the

6. E. coli Routine and repeat samples are total 0 Human and animal water may be contaminated

coliform-positive and either is E. fecal waste. with human or animal coli-positive or Supplier of Water fails wastes. Human pathogens to take repeat samples following E. in these wastes can cause coli-positive routine sample or Supplier short-term effects, such as of W ater fails to analyze total diarrhea, cramps, nausea, coliform-positive repeat sample for E. headaches, or other coli symptoms. They may pose

a greater health risk for infants, young children, the elderly, and people with severely compromised immune systems.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

7. Fecal Indicators TT - TT N/A Human and animal Fecal indicators are

a. (E. coli, enterococci, fecal waste microbes whose presence or coliphage) indicates that the water may Groundwater Rule be contaminated with

human or animal wastes. Microbes in these wastes can cause short-term health effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special health risk for infants, young children, some of the elderly, and people with severely compromised immune systems.

8. Total organic TT - TT N/A Naturally present in Total organic carbon carbon the environment (TOC) has no health

effects. However, total organic carbon provides a medium for the formation of disinfection by products. These byproducts include Trihalomethanes (THMs) and haloacetic acids (HAAs). Drinking water containing these byproducts in excess of the MCL may lead to adverse health effects, liver or kidney problems, or nervous system effects, and may lead to an increase risk of getting cancer.

9. Turbidity TT - TT N/A Soil runoff Turbidity has no health

effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, Viruses, and parasites that can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

10. Viruses (enteric) TT - TT 0 Discharged especially Some people who drink

where water is water containing Viruses contaminated with could experience severe sewage or animal gastrointestinal effects. wastes

Radioactive Contaminants

11. Beta/photon 4 mrem/yr - 4 0 Decay of natural and Certain minerals are emitters mrem/yr man-made deposits radioactive and may emit

forms of radiation known as photons and beta radiation. Some people who drink water containing beta and photon emitters in excess of the MCL over many years may have an increased risk of getting cancer.

12. Alpha emitters 15 Ci/l p - 15 Ci/l p 0 Erosion of natural Certain minerals are

deposits radioactive and may emit a

form of radiation known as alpha radiation. Some people who drink water containing alpha emitters in excess of the MCL over many years may have an increased risk of getting cancer.

13. Combined radium 5 Ci/l p - 5 Ci/l p 0 Erosion of natural Some people who drink

deposits water containing radium

226 or 228 in excess of the MCL over many years may have an increased risk of getting cancer.

1

14. Uranium 0.030 mg/l 1000 30 ppb 0 Erosion of natural Some people who drink

deposits water containing uranium

in excess of the MCL over many years may have an increased risk of getting cancer and kidney toxicity.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

Inorganic Contaminants

15. Antimony 0.006 mg/l 1000 6 ppb 6 ppb Fire retardants; Some people who drink

ceramics; electronics; water containing antimony solder well in excess of the MCL

over many years could experience increases in blood cholesterol and decreases in blood sugar.

16. Arsenic 0.01 mg/l 1000 10 ppb N/A Erosion of natural Some people who drink

deposits; runoff from water containing arsenic in orchards; runoff from excess of the MCL over glass and electronics many years could production wastes experience skin damage or

problems with their circulatory system, and may have an increased risk of getting cancer.

17. Asbestos 7 MFL - 7 MFL 7 MFL Decay of asbestos Some people who drink

cement water mains; water containing asbestos erosion of natural in excess of the MCL over deposits many years may have an

increased risk of developing benign intestinal polyps.

18. Barium 2 mg/l - 2 ppm 2 ppm Discharge of drilling Some people who drink

wastes; discharge from water containing barium in metal refineries; excess of the MCL over erosion of natural many years could deposits experience an increase in

their blood pressure.

19. Beryllium 0.004 mg/l 1000 4 ppb 4 ppb Discharge from Some people who drink

electrical, aerospace, water containing beryllium and defense industries; well in excess of the MCL erosion of natural over many years could deposits develop intestinal lesions.

20. Bromate 0.010 mg/l 1000 10 ppb 0 By-product of drinking Some people who drink

water Disinfection water containing bromate

in excess of the MCL over many years have an increased risk of getting cancer.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

21. Cadmium 0.005 mg/l 1000 5 ppb 5 ppb Corrosion of Some people who drink

galvanized pipes; water containing cadmium erosion of natural in excess of the MCL over deposits; discharge many years could from metal refineries; experience kidney damage. runoff from waste batteries and paints

22. Chloramines MRDL= 4 - MRDL= MRDLG= W ater additive used to Some people who use

mg/l 4 ppm 4 ppm control microbes water containing

chloramines well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chloramines well in excess of the MRDL could experience stomach discomfort or anemia.

23. Chlorine MRDL= 4 - MRDL= MRDLG= W ater additive used to Some people who use

mg/l 4 ppm 4 ppm control microbes water containing chlorine

well in excess of the MRDL could experience irritating effects to their eyes and nose. Some people who drink water containing chlorine well in excess of the MRDL could experience stomach discomfort.

24. Chlorine dioxide MRDL= 1000 800 ppb MRDLG= W ater additive used to Some infants and young

0 .8 mg/l 800 ppb control microbes children who drink water

containing chlorine dioxide in excess of the MRDL could experience nervous system effects. Similar effects may occur in fetuses of pregnant women who drink water containing chlorine dioxide in excess of the MRDL. Some people may experience anemia.

25. Chlorite 1 mg/l - 1 ppm 0.8 ppm By-product of drinking Some infants and young

water Disinfection children who drink water

containing chlorite in excess of the MCL could experience nervous system effects. Similar effects may occur in fetuses of pregnant women who drink water containing chlorite in excess of the MCL. Some people may experience anemia.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

26. Chromium 0.1 mg/l 1000 100 ppb 100 ppb Discharge from steel Some people who use

and pulp mills; erosion water containing chromium of natural deposits well in excess of the MCL

over many years could experience allergic dermatitis.

27. Copper AL=1.3 - AL=1.3 1.3 ppm Corrosion of Copper is an essential

mg/l ppm household plumbing nutrient, but some people

systems; erosion of who drink water containing natural deposits; copper in excess of the leaching from wood action level over a preservatives relatively short amount of

time could experience gastrointestinal distress. Some people who drink water containing copper in excess of the action level over many years could suffer liver or kidney damage. People with W ilson's Disease should consult their personal doctor.

28. Cyanide 0.2 mg/l 1000 200 ppb 200 ppb Discharge from metal Some people who drink

factories; discharge water containing cyanide from plastic and well in excess of the MCL fertilizer factories over many years could

experience nerve damage or problems with their thyroid.

3

29. Fluoride 4 mg/l - 4 ppm 4 ppm Erosion of natural Some people who drink

deposits; water water containing fluoride in additive which excess of the MCL over promotes strong teeth; many years could get bone discharge from disease, including pain and fertilizer and tenderness of the bones. aluminum factories Children may get mottled

teeth.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

30. Lead AL= 0.015 1000 AL=15 0 Corrosion of Infants and children who

mg/l ppb household plumbing drink water containing lead

systems; erosion of in excess of the action level natural deposits could experience delays in

their physical or mental development. Children could show slight deficits in attention span and learning abilities. Adults who drink this water over many years could develop kidney problems or high blood pressure.

31. Mercury 0.002 mg/l 1000 2 ppb 2 ppb Erosion of natural Some people who drink [inorganic] deposits; discharge water containing inorganic

from refineries and mercury well in excess of factories; runoff from the MCL over many years landfills; runoff from could experience kidney cropland damage.

32. Nitrate 10 mg/l - 10 ppm 10 ppm Runoff from fertilizer Infants younger than six

use; leaching from months old who drink septic tanks, sewage; water containing nitrate in erosion of natural excess of the MCL could deposits become seriously ill and, if

untreated, may die. Symptoms include shortness of breath and blue baby syndrome.

33. Nitrite 1 mg/l - 1 ppm 1 ppm Runoff from fertilizer Infants younger than six

use; leaching from months old who drink septic tanks, sewage; water containing nitrite in erosion of natural excess of the MCL could deposits become seriously ill and, if

untreated, may die. Symptoms include shortness of breath and blue baby syndrome.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

34. Perchlorate 0.002 mg/l 1000 2 ppb N/A Rocket propellants, Perchlorate interferes with

fireworks, munitions, the normal function of the flares, blasting agents thyroid gland and thus has

the potential to affect growth and development, causing brain damage and other adverse effects, particularly in fetuses and infants. Pregnant women, the fetus, infants, children younger than 12 years old, and people with a hypothyroid condition are particularly susceptible to perchlorate toxicity.

35. Selenium 0.05 mg/l 1000 50 ppb 50 ppb Discharge from metal Selenium is an essential

refineries; erosion of nutrient. However, some natural deposits; people who drink water discharge from mines containing selenium in

excess of the MCL over many years could experience hair or fingernail losses, numbness in fingers or toes, or problems with their circulation.

36. Thallium 0.002 mg/l 1000 2 ppb 0.5 ppb Leaching from Some people who drink

ore-processing sites; water containing thallium discharge from in excess of the MCL over electronics, glass, and many years could drug factories experience hair loss,

changes in their blood, or problems with their kidneys, intestines, or liver.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

Synthetic Organic Contaminants Including Pesticides and Herbicides

37. 2,4-D (ppb) 0.07 mg/l 1000 70 ppb 70 ppb Runoff from herbicide Some people who drink

used on row crops water containing the weed

killer 2,4-D well in excess of the MCL over many years could experience problems with their kidneys, liver, or adrenal glands.

38. 2,4,5-TP 0.05 mg/l 1000 50 ppb 50 ppb Residue of banned Some people who drink [Silvex] herbicide water containing silvex in

excess of the MCL over many years could experience liver problems.

39. Acrylamide TT - TT 0 Added to water during Some people who drink

sewage/ wastewater water containing high treatment levels of acrylamide over a

long period of time could have problems with their nervous system or blood, and may have an increased risk of getting cancer.

40. Alachlor 0.002 mg/l 1000 2 ppb 0 Runoff from herbicide Some people who drink

used on row crops water containing alachlor in

excess of the MCL over many years could have problems with their eyes, liver, kidneys, or spleen, or experience anemia, and may have an increased risk of getting cancer.

41. Atrazine 0.003 mg/l 1000 3 ppb 3 ppb Runoff from herbicide Some people who drink

used on row crops water containing atrazine

well in excess of the MCL over many years could experience problems with their cardiovascular system or reproductive difficulties.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

42. Benzo(a)pyrene 0.0002 mg/l 1,000,000 200 ppt 0 Leaching from linings Some people who drink [PAH] of water storage tanks water containing

and distribution lines benzo(a)pyrene in excess

of the MCL over many years may experience reproductive difficulties and may have an increased risk of getting cancer.

43. Carbofuran 0.04 mg/l 1000 40 ppb 40 ppb Leaching of soil Some people who drink

(ppb) fumigant used on rice water containing

and alfalfa carbofuran in excess of the

MCL over many years could experience problems with their blood, or nervous or reproductive systems.

44. Chlordane 0.002 mg/l 1000 2 ppb 0 Residue of banned Some people who drink

termiticide water containing chlordane

in excess of the MCL over many years could experience problems with their liver or nervous system, and may have an increased risk of getting cancer.

45. Dalapon 0.2 mg/l 1000 200 ppb 200 ppb Runoff from herbicide Some people who drink

used on rights of way water containing dalapon

well in excess of the MCL over many years could experience minor kidney changes.

46. Di(2-ethylhexyl) 0.4 mg/l 1000 400 ppb 400 ppb Discharge from Some people who drink adipate chemical factories water containing

di(2-ethylhexyl) adipate well in excess of the MCL over many years could experience toxic effects such as weight loss, liver enlargement, or possible reproductive difficulties.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

47. Di(2-ethylhexyl) 0.006 mg/l 1000 6 ppb 0 Discharge from rubber Some people who drink phthalate and chemical factories water containing

di(2-ethylhexyl) phthalate well in excess of the MCL over many years may have prob-lems with their liver, or experience reproductive difficulties, and may have an increased risk of getting cancer.

48. Dibromochloro- 0.0002 mg/l 1,000,000 200 ppt 0 Runoff/leaching from Some people who drink propane (DBCP) soil fumigant used on water containing DBCP in

soybeans, cotton, and excess of the MCL over orchards many years could

experience reproductive problems and may have an increased risk of getting cancer.

49. Dinoseb 0.007 mg/l 1000 7 ppb 7 ppb Runoff from herbicide Some people who drink

used on soybeans and water containing dinoseb vegetables well in excess of the MCL

over many years could experience reproductive difficulties.

50. Diquat 0.02 mg/l 1000 20 ppb 20 ppb Runoff from herbicide Some people who drink

use water containing diquat in

excess of the MCL over many years could get cataracts.

51. Dioxin [2, 3, 7, 0.00000003 1,000,000,000 30 ppq 0 Emissions from waste Some people who drink 8-TCDD] (ppq) mg/l incineration and other water containing dioxin in

combustion; discharge excess of the MCL over from chemical many years could factories experience reproductive

difficulties and may have an increased risk of getting cancer.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

52. Endothall 0.1 mg/l 1000 100 ppb 100 ppb Runoff from herbicide Some people who drink

use water containing endothall

in excess of the MCL over many years could experience problems with their stomach or intestines.

53. Endrin 0.002 mg/l 1000 2 ppb 2 ppb Residue of banned Some people who drink

insecticide water containing endrin in

excess of the MCL over many years could experience liver problems.

54. Epichlorohydrin TT - TT 0 Discharge from Some people who drink

industrial chemical water containing high factories; an impurity levels of epichlorohydrin of some water over a long period of time treatment chemicals could experience stomach

problems, and may have an increased risk of getting cancer.

55. Ethylene 0.00002 1,000,000 20 ppt 0 Discharge from Some people who drink dibromide mg/l petroleum refineries water containing ethylene

dibromide in excess of the MCL over many years could experience problems with their liver, stomach, reproductive system, or kidneys, and may have an increased risk of getting cancer.

56. Glyphosate 0.7 mg/l 1000 700 ppb 700 ppb Runoff from herbicide Some people who drink

use water containing

glyphosate in excess of the MCL over many years could experience problems with their kidneys or reproductive difficulties.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

57. Heptachlor 0.0004 mg/l 1,000,000 400 ppt 0 Residue of banned Some people who drink

pesticide water containing heptachlor

in excess of the MCL over many years could experience liver damage and may have an increased risk of getting cancer.

58. Heptachlor 0.0002 mg/l 1,000,000 200 ppt 0 Breakdown of Some people who drink epoxide heptachlor water containing heptachlor

epoxide in excess of the MCL over many years could experience liver damage, and may have an increased risk of getting cancer.

59. Hexachloro- 0.001 mg/l 1000 1 ppb 0 Discharge from metal Some people who drink benzene refineries and water containing

agricultural chemical hexachlorobenzene in factories excess of the MCL over

many years could experience problems with their liver or kidneys, or adverse reproductive effects, and may have an increased risk of getting cancer.

60. Hexachlorocy- 0.05 mg/l 1000 50 ppb 50 ppb Discharge from Some people who drink clopenta-diene chemical factories water containing

hexachlorocyclopentadiene well in excess of the MCL over many years could experience problems with their kidneys or stomach.

61. Lindane 0.0002 mg/l 1,000,000 200 ppt 200 ppt Runoff/leaching from Some people who drink

insecticide used on water containing lindane in cattle, lumber, gardens excess of the MCL over

many years could experience problems with their kidneys or liver.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

62. Methoxychlor 0.04 mg/l 1000 40 ppb 40 ppb Runoff/leaching from Some people who drink

insecticide used on water containing fruits, vegetables, methoxychlor in excess of alfalfa, livestock the MCL over many years

could experience reproductive difficulties.

63. Oxamyl 0.2 mg/l 1000 200 ppb 200 ppb Runoff/leaching from Some people who drink [Vydate] insecticide used on water containing oxamyl in

apples, potatoes and excess of the MCL over tomatoes many years could

experience slight nervous system effects.

64. PCBs 0.0005 mg/l 1,000,000 500 ppt 0 Runoff from landfills; Some people who drink [Polychlorinated discharge of waste water containing PCBs in biphenyls] chemicals excess of the MCL over

many years could experience changes in their skin, problems with their thymus gland, immune deficiencies, or reproductive or nervous system difficulties, and may have an increased risk of getting cancer.

65. Pentachloro- 0.001 mg/l 1000 1 ppb 0 Discharge from wood Some people who drink phenol preserving factories water containing

pentachlorophenol in excess of the MCL over many years could experience problems with their liver or kidneys, and may have an increased risk of getting cancer.

66. Picloram 0.5 mg/l 1000 500 ppb 500 ppb Herbicide runoff Some people who drink

water containing picloram in excess of the MCL over many years could experience problems with their liver.

67. Simazine 0.004 mg/l 1000 4 ppb 4 ppb Herbicide runoff Some people who drink

water containing simazine in excess of the MCL over many years could experience problems with their blood.

68. Toxaphene 0.003 mg/l 1000 3 ppb 0 Runoff/leaching from Some people who drink

insecticide used on water containing toxaphene cotton and cattle in excess of the MCL over

many years could have problems with their kidneys, liver, or thyroid, and may have an increased risk of getting cancer.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

Volatile Organic Contaminants

69. Benzene 0.005 mg/l 1000 5 ppb 0 Discharge from Some people who drink

factories; leaching water containing benzene from gas storage tanks in excess of the MCL over and landfills many years could

experience anemia or a decrease in blood platelets, and may have an increased risk of getting cancer.

70. Carbon 0.005 mg/l 1000 5 ppb 0 Discharge from Some people who drink tetrachloride chemical plants and water containing carbon

other industrial tetrachloride in excess of activities the MCL over many years

could experience problems with their liver and may have an increased risk of getting cancer.

71. Chlorobenzene 0.1 mg/l 1000 100 ppb 100 ppb Discharge from Some people who drink

chemical and water containing agricultural chemical chlorobenzene in excess of factories the MCL over many years

could experience problems with their liver or kidneys.

72. o-Dichlorobenzene 0.6 mg/l 1000 600 ppb 600 ppb Discharge from Some people who drink

industrial chemical water containing factories o-dichlorobenzene well in

excess of the MCL over many years could experience problems with their liver, kidneys, or circulatory systems.

73. p-Dichlorobenzene 0.005 mg/l 1000 5 ppb 5 ppb Discharge from Some people who drink

industrial chemical water containing factories p-dichlorobenzene in

excess of the MCL over many years could experience anemia, damage to their liver, kidneys, or spleen, or changes in their blood.

74. 1,2-Dichloroethane 0.005 mg/l 1000 5 ppb 0 Discharge from Some people who drink

industrial chemical water containing factories 1,2-dichloroethane in

excess of the MCL over many years may have an increased risk of getting cancer.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

75. 1,1-Dichloroethyle 0.007 mg/l 1000 7 ppb 7 ppb Discharge from Some people who drink ne industrial chemical water containing

factories 1,1-dichloroethylene in

excess of the MCL over many years could experience problems with their liver.

76. cis-1,2-Dichloroet 0.07 mg/l 1000 70 ppb 70 ppb Discharge from Some people who drink hylene industrial chemical water containing

factories cis-1,2-dichloroethylene in

excess of the MCL over many years could experience problems with their liver.

77. trans-1,2-Dichloro 0.1 mg/l 1000 100 ppb 100 ppb Discharge from Some people who drink ethylene industrial chemical water containing

factories trans-1,2-dichloroethylene

well in exc•ess of the MCL over many years could experience problems with their liver.

78. Dichloromethane 0.005 mg/l 1000 5 ppb 0 Discharge from Some people who drink

pharmaceutical and water containing chemical factories dichloromethane in excess

of the MCL over many years could have liver problems and may have an increased risk of getting cancer.

79. 1,2-Dichloropropa 0.005 mg/l 1000 5 ppb 9 Discharge from Some people who drink ne industrial chemical water containing

factories 1,2-dichloropropane in

excess of the MCL over many years may have an increased risk of getting cancer.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

80. Ethylbenzene 0.7 mg/l 1000 700 ppb 700 ppb Discharge from Some people who drink

industrial chemical water containing factories ethylbenzene well in excess

of the MCL over many years could experience problems with their liver or kidneys.

81. Haloacetic Acids 0.060 mg/l 1000 60 ppb N/A By-product of drinking Some people who drink (HAA5) water Disinfection water containing haloacetic

acids in excess of the MCL over many years may have an increased risk of getting cancer.

82. Styrene 0.1 mg/l 1000 100 ppb 100 ppb Discharge from rubber Some people who drink

and plastic factories; water containing styrene leaching from landfills well in excess of the MCL

over many years could have problems with their liver, kidneys, or circulatory system.

83. Tetrachloroethylen 0.005 mg/l 1000 5 ppb 0 Discharge from Some people who drink e factories and dry water containing

cleaners and asbestos tetrachloroethylene in cement lined pipes excess of the MCL over

many years could have problems with their liver, and may have an increased risk of getting cancer.

84. 1,2,4-Trichloroben 0.07 mg/l 1000 70 ppb 70 ppb Discharge from textile- Some people who drink zene finishing factories water containing

1,2,4-trichlorobenzene well in excess of the MCL over many years could experience changes in their adrenal glands.

85. 1,1,1-Trichloroeth 0.2 mg/l 1000 200 ppb 200 ppb Discharge from metal Some people who drink ane degreasing sites and water containing

other factories 1,1,1-trichloroethane in

excess of the MCL over many years could experience problems with their liver, nervous system, or circulatory system.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

86. 1,1,2-Trichloro- 0.005 mg/l 1000 5 ppb 3 ppb Discharge from Some people who drink ethane industrial chemical water containing

factories 1,1,2-trichloroethane well

in excess of the MCL over many years could have problems with their liver, kidneys, or immune systems.

87. Trichloroethylene 0.005 mg/l 1000 5 ppb 0 Discharge from metal Some people who drink

degreasing sites and water containing other factories trichloroethylene in excess

of the MCL over many years could experience problems with their liver and may have an increased risk of getting cancer.

88. TTHMs [Total 0.08 mg/l 1000 80 ppb N/A By-product of drinking Some people who drink Trihalomethanes] water Disinfection water containing

trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous systems, and may have an increased risk of getting cancer.

89. Toluene 1 mg/l - 1 ppm 1 ppm Discharge from Some people who drink

petroleum factories water containing toluene

well in excess of the MCL over many years could have problems with their nervous system, kidneys, or liver.

Contaminant Traditional To convert for MCL in MCLG in Major Sources Health Effects

MCL CCR, multiply CCR CCR units in Drinking Language

by units W ater

90. Vinyl Chloride 0.002 mg/l 1000 2 ppb 0 Leaching from PVC Some people who drink

piping; discharge from water containing vinyl plastics factories chloride in excess of the

MCL over many years may have an increased risk of getting cancer.

91. Xylenes 10 mg/l 1000 10 ppm 10 ppm Discharge from Some people who drink

(10,000 10,000 petroleum factories; water containing xylenes in ppb) ppb discharge from excess of the MCL over

chemical factories many years could

experience damage to their nervous system.

Per- and Polyfluoroalkyl Substances (PFAS)

92. PFAS6 0.000020 1,000,000 20 None Discharges and Some people who drink

mg/l ng/l emissions from water containing these

(or industrial and PFAS in excess of the ppt) manufacturing sources MCL may experience

associated with the certain adverse effects. production or use of These could include effects these PFAS, including on the liver, blood, immune production of moisture system, thyroid, and fetal and oil resistant development. These PFAS coatings on fabrics and may also elevate the risk of other materials. certain cancers. Additional sources include the use and disposal of products containing these PFAS, such as fire-fighting foams.

1. (b) Table 2 - Unregulated Contaminants Chart.

Sources to Drinking Water and Health Effects

Key: CASRN - Chemical Abstract Services Registry Number ppm - parts per million pCi/L - Picocuries per liter CCR - Consumer Confidence Report ORSG - Office of Research and Standards Guideline ppb - parts per billion mg/L - milligrams per liter (same as ppm) ppt - parts per trillion

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

Acetone 6.3 - 6.3 ppm Discharge from industrial Some people who drink (67641) mg/L production and use, in water containing acetone at

automobile exhaust, from high concentrations for landfills and natural sources many years could

experience effects on the blood, kidney, liver, and reproductive system.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

Aldicarb 0.003 1000 3 ppb Run-off from use as a Some people who drink (116063) mg/L pesticide water containing aldicarb at

high concentrations for many years could experience effects on the central nervous system.

Aldicarb sulfone 0.002 1000 2 ppb Degraded from aldicarb by Some people who drink (1646884) mg/L plants water containing aldicarb

sulfone in high concentrations for many years could experience effects on the central nervous system.

Aldicarb sulfoxide 0.004 1000 4 ppb Degraded from aldicarb by Some people who drink (74839) mg/L plants water containing aldicarb

sulfoxide in high concentrations for many years could experience effects on the central nervous system.

Aldrin * - - Run-off from insecticide use Some people who drink

water containing aldrin in high concentrations for many years could experience liver damage, kidney effects.

4-androstene-3,17-dione * - - - - (63058)

Bromobenzene * - - Discharge from use in Some people who drink (108861) chemical manufacturing water containing

bromobenzene in high concentrations for many years could experience central nervous system effects.

Bromomethane 0.01 1000 10 ppb Run-off from use as a Some people who drink (methyl bromide) mg/L fumigant water containing (74839) bromomethane at high

concentrations for many years could experience digestive tract effects, and headaches.

Bromodichloromethane * - - Trihalomethane; by-product Some people who drink (75274 ) of drinking water water containing

chlorination bromodichloromethane at

high concentrations for many years could experience liver and kidney problems.

Bromochloromethane * - - - - (Halon 1001) (74975)

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

Bromoform * - - Trihalomethane; by-product Some people who drink (75252) of drinking water water containing

chlorination bromoform at high

concentrations for many years could experience liver and kidney problems.

Butachlor * - - Run-off from use as a Some people who drink (23184669) herbicide water containing butachlor

at high concentrations for many years could experience liver effects.

1,3-Butadiene * - - - - (106990)

Butylbenzene isomers * - - Run-off from industrial use Some people who drink (n;sec;tert) water containing

butylbenzene isomers at high concentrations for many years could experience central nervous system effects.

Carbaryl * - - Run-off from use as an Some people who drink (63252) insecticide water containing carbaryl at

high concentrations for many years could experience kidney and liver effects.

Chlorate * - - - - (14866683)

Chlorodifluoromethane * - - - - (HCFC-22) (75456)

Chloroethane * - - Discharge from industrial Some people who drink (75003) uses water containing

chloroethane at high concentrations for many years could experience dizziness, nausea, and vomiting.

Chloroform 0.07 1000 70 ppb Trihalomethane; by-product Some people who drink ( 67663 ) mg/L of drinking water water containing

chlorination. [In chloroform at high non-chlorinated sources, concentrations for many chloroform may be naturally years could experience occurring.] liver and kidney problems

and may have an increased risk of cancer.

Chloromethane * - - Discharge from industrial Some people who drink (methyl chloride) uses water containing (74873) chloromethane at high

concentrations for many years could experience dizziness and fatigue.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

o-Chlorotoluene * - - Discharge from industrial Some people who drink (95498) use water containing

o-chlorotoluene at high concentrations for many years could experience central nervous system effects.

Chromium-6 * - - - - (18540299)

Cobalt * - - - - (7440484)

Dibromochloromethane * - - Trihalomethane; by-product Some people who drink (124481) of drinking water water containing

chlorination dibromochloromethane at

high concentrations for many years could experience liver and kidney problems.

Dicamba * - - Run-off from use as a Some people who drink (1918009) herbicide water containing dicamba

at high concentrations for many years could experience central nervous system effects.

m-Dichlorobenzene * - - Discharge from use in Some people who drink (541731) chemical manufacturing water containing

m-dichlorobenzene at high concentrations for many years could experience damage to red blood cells.

Dichlorodifluoromethane 1.4 - 1.4 ppm Discharge from use as a Some people who drink (Freon 12) (75718) mg/L refrigerant water containing

dichlorodifluoromethane at high concentrations for many years could experience dizziness and headaches.

1,1-Dichloroethane 0.07 1000 70 ppb Discharge from use as a Some people who drink (75343) mg/L degreasing agent water containing

1,1-dichloroethane at high concentrations for many years could experience liver and kidney effects.

2,2-Dichloropropane * - - Discharge from use in Some people who drink

chemical manufacturing water containing

2,2-dichloropropane at high concentrations for many years could experience central nervous system effects.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

1,3-Dichloropropane * - - Discharge from use in Some people who drink (142289) chemical manufacturing water containing

1,3-dichloropropane at high concentrations for many years could experience central nervous system effects.

1,1-Dichloropropene * - - Discharge from use in Some people who drink

chemical manufacturing water containing

1,1-dichloropropene at high concentrations for many years could experience central nervous system effects.

1,3-Dichloropropene 0.0004 1,000,000 400 ppt Run-off from use as a Some people who drink (cis,trans) mg/L nematocide water containing cis or (542756) trans-1.3-dichloropropene

at high concentrations for many years could experience irritation of the eyes, ears, nose, and throat or cancer.

Dieldrin * - - Run-off from pesticide Some people who drink (60571) application water containing dieldrin at

high concentrations for many years could experience liver damage, convulsions, or cancer.

1,4-Dioxane 0.0003 1000 0.3 ppb Discharge from chemical Some people who drink (123911) mg/L manufacturing and landfills water containing

1,4-dioxane at high concentrations for many years could experience chronic kidney and liver effects and liver cancer.

Enteroviruses * - - - - (N/A)

Equilin * - - - - (474862)

17-B-estradiol * - - - - (50282)

Estrone * - - - - (53167)

Ethylene glycol 14 mg/L - 14 ppm Run-off from use as a Some people who drink (107211) deicing chemical; discharge water containing ethylene

from antifreeze and glycol at high industrial solvents concentrations for many

years could experience effects on the kidneys, nervous system, and the heart.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

17-a-ethynylestradiol * - - - - (ethinyl estradiol) (57636)

Hexachlorobutadiene * - - Discharge from use as an Some people who drink (87683) industrial solvent water containing

hexachlorobutadiene at high concentrations for many years could experience kidney effects and effects on a fetus.

3-Hydroxycarbofuran * - - Breakdown product from the Some people who drink

use of the pesticide water containing carboxyfuran 3-hydroxycarbofuran at

high concentrations for many years could experience liver effects.

Isopropylbenzene * - - Discharge from chemical Some people who drink (98828) manufacturing water containing

isopropylbenzene at high concentrations for many years could experience central nervous system effects.

Isopropyltoluene * - - Discharge from chemical Some people who drink

manufacturing water containing

isopropyltoluene at high concentrations for many years may experience central nervous system effects.

Methyl ethyl ketone 0.35 1000 350 Discharge from use as a Some people who drink (78933) mg/L production solvent and water containing methyl

degreaser ethyl ketone at high

concentrations for many years could experience effects on the kidney.

Methyl isobutyl ketone 4.0 - 4 ppm Discharge from use as a Some people who drink (108101) mg/L production and extraction water containing methyl

solvent isobutyl ketone at high

concentrations for many years could experience effects on the kidney and liver.

Methyl tertiary butyl ether 0.07 1000 70 ppb Fuel additive; leaks and Some people who drink or MTBE mg/L spills from gasoline storage water containing methyl (1634044) tanks tertiary butyl ether at high

concentrations for many years could experience chronic effects on the kidney and liver and possible cancer.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

Methomyl * - - Runoff from use as an Some people who drink (16752775) insecticide water containing methomyl

at high concentrations for many years could experience kidney effects.

Metolachlor 0.1 1000 100 ppb Run-off from use as a Some people who drink (51218452) mg/L herbicide water containing

metolochlor at high concentrations for many years could experience cancer.

Metribuzin * - - Run-off from use as a Some people who drink (21087649) herbicide water containing

metribuzin at high concentrations for many years could experience liver and kidney effects.

Molybdenum * - - - - (7439987)

Naphthalene 0.140 1000 140 ppb Discharge from use in Some people who drink (91203) mg/L mothballs and other water containing

domestic products naphthalene at high

concentrations for many years could experience damage to red blood cells, nausea and vomiting.

Nickel 0.1 1000 100 ppb Discharge from domestic Some people who drink (7440020) mg/L wastewater, landfills, and water containing nickel at

mining and smelting high concentrations for operations many years could

experience effects on the lung, stomach, blood, liver, kidneys, immune system, reproduction, and development.

N-nitrosodimethylamine * - - Discharge from industrial Some people who drink (NDMA) (62759) use; as a by-product of water containing NDMA at

drinking water treatment; high concentrations as well produced from naturally as infants born to pregnant occurring precursor women who drink the water chemicals may experience an

increased risk of cancer. This chemical may also produce liver disease and kidney effects after short-term exposure to high doses or long-term exposure to lower doses.

Noroviruses * - - - - (N/A)

Hexafluoropropylene * - - - - oxide dimer acid (HFPO-DA) (13252-13-6)

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

N-ethyl * - - - - perfluorooctanesulfonami doacetic acid (NEtFOSAA) (2991-50-6)

N-methyl * - - - - perfluorooctanesulfonami doacetic acid (NMeFOSAA) (2355-31-9)

Perfluorobutanesulfonic * - - - - Acid (PFBS) (375735)

Perfluorododecanoic acid * - - - - (PFDoA) (307-55-1)

Perfluorohexanoic acid * - - - - (PFHxA) (307-24-4)

Perfluorotetradecanoic * - - - - acid (PFTA) (376-06-7)

Perfluorotridecanoic acid * - - - - (PFTrDA) (72629-94-8)

Perfluoroundecanoic acid * - - - - (PFUnA) (2058-94-8)

11-chloroeicosafluoro-3-o * - - - - xaundecane-1-sulfonic acid (11Cl-PF3OUdS) (763051-92-9)

9-chlorohexadecafluoro-3 * - - - - -oxanone-1-sulfonic acid (9Cl-PF3ONS) (756426-58-1)

4,8-dioxa-3H-perfluorono * - - - - nanoic acid (ADONA) (919005-14-4)

Petroleum hydrocarbons 0.2 1000 200 ppb Discharge from the Some people who drink Total P.H. mg/L production, distribution, water containing petroleum Aliphatics storage, and use of hydrocarbons at high C5-C8 (30080) petroleum in transportation concentrations for many C9-C12(30089) 1000 300 ppb and industrial applications years could experience C9-C18(30092) 0.3 1000 700 ppb effects on the central C19-C36(30057) mg/L 1000 700 ppb nervous system, blood, Aromatics 0.7 0 14 ppm immune system, liver, C9-C10(30087) mg/L spleen, kidneys, developing C11-C22(30048) 0.7 1000 200 ppb fetus, and lungs.

mg/L 1000 200 ppb 14.0 mg/L

0.2 mg/L 0.2 mg/L

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

Propachlor * - - Runoff from use as a Some people who drink (1918167) herbicide water containing

propachlor at high concentrations for many years could experience liver effects.

n-propylbenzene * - - Discharge from chemical Some people who drink (103651) manufacturing water containing

n-propylbenzene at high concentrations for many years may experience central nervous system effects.

Radon-222 10,000 - 10,000 pCi/L Natural sources Some people who drink (14869677) pCi/L water containing radon-222

at high concentrations for many years could experience cancer of the lung.

Sodium 20 mg/L - 20 ppm Discharge from the use and Some people who drink (7440235) improper storage of water containing sodium at

sodium-containing deicing high concentrations for compounds or in many years could water-softening agents experience an increase in

blood pressure.

Strontium * - - - - (7440246)

Sulfate * - - Natural sources Some people who drink

water containing sulfate at high concentrations for many years could experience diarrhea.

Tertiary-amyl methyl 0.09 1000 90 ppb Discharge from use as an Some people who drink ether mg/L octane enhancer and water containing TAME at (TAM E) (994058) oxygenate in gasoline high concentrations for

many years could experience effects on the kidney and liver and possible cancer.

Tertiary butyl alcohol 0.12 1000 120 ppb Degraded from MTBE; Some people who drink (TBA) (75650) mg/L discharged from use as an water containing TBA at

octane enhancer and high concentrations for oxygenate in gasoline many years could

experience effects on the kidney and bladder and possible cancer.

Testosterone * - - - - (58220)

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

1,1,1,2-Tetrachloroethane * - - Discharge from use in Some people who drink (630206) chemical manufacturing water containing

1,1,1,2-tetrachloroethane at high concentrations for many years could experience liver effects.

1,1,2,2-Tetrachloroethane * - - Discharge from use in dry Some people who drink (79345) cleaning water containing

1,1,2,2-tetrachloroethane at high concentrations for many years could experience nausea, vomiting and liver damage.

Tetrahydrofuran 1.3 - 1.3 ppm Discharge from use as an Some people who drink (109999) mg/L adhesive for joining pipes in water containing

water treatment systems and tetrahydrofuran at high as a production solvent concentrations for many

years could experience effects on the central nervous system, liver, kidney, and lung and possible cancer.

1,2,3-Trichlorobenzene * - - Discharge from use in Some people who drink

chemical manufacturing water containing

1,2,3-trichlorobenzene at high concentrations for many years could experience liver effects.

1,1,2-Trichloro-1,2,2-tri- 210 - 210 ppm Discharge from use as a Some people who drink fluoroethane mg/L cleaning agent, production water containing (76131) solvent, and blowing agent 1,1,2-trichloro-1,2,2-tri-

fluoroethane at high concentrations for many years could experience problems on the nervous system.

Trichlorofluoromethane * - - Discharge from use as a Some people who drink (Freon 11) refrigerant water containing (75694) trichlorofluoromethane at

high concentrations for many years could experience central nervous system effects.

1,2,3-Trichloropropane * - - Discharge from use in paint Some people who drink (96184) and varnish removers water containing

1,2,3-trichloropropane at high concentrations for many years could experience liver damage.

Chemical ORSG To convert for ORSG Source to Drinking W ater Health Effects (CASRN) CCR, multiply by in CCR units

1,2,4-Trimethylbenzene * - - Discharge from use in dyes Some people who drink (95636) and paints water containing

1,2,4-trimethylbenzene at high concentrations for many years could experience central nervous system effects.

1,3,5-Trimethylbenzene * - - Discharge from use in Some people who drink (108678) chemical manufacturing water containing

1,3,5-trimethylbenzene at high concentrations for many years could experience central nervous system effects.

Vanadium * - - - - (7440622)

* There is no ORS Guideline issued as yet for these contaminants. Health risk information for these chemicals may be obtained from the Drinking W ater Program's Consumer Confidence Report guidance available on the MassDEP website or by contacting the Drinking W ater Program. Drinking W ater Contaminant Human Health Effects Information is also available on USEPA's website.

1. (c) Table 3 - Secondary Contaminants Chart.

Sources to Drinking Water and Health and/or Aesthetic Effects

Key: CASRN - Chemical Abstract Services Registry Number mg/L - milligram per liter (same as ppm) SMCL - Secondary Maximum Contaminant Level ppm - parts per million C.U. - Color Unit ppb - parts per billion T.O.N. - Threshold odor numbers

Chemical SMCL To convert for SMCL Source to Drinking Health and/or Aesthetic Effects (CASRN) CCR, multiply in CCR units W ater

by

Aluminum 0.2 mg/L 1000 200 ppb Residue from water May produce colored water.

treatment process: erosion of natural deposits

Chloride 250 mg/L - 250 ppm Runoff and leaching May produce a salty taste.

from natural deposits; seawater influence

Color 15 C.U. - 15 C.U. Naturally occurring May produce a visible tint.

material

Copper 1 mg/L - 1 ppm Internal corrosion of May produce a metallic taste;

household plumbing; blue-green staining. erosion of natural deposits

Corrosivity Non-corrosive - - Balance of hydrogen, May produce a metallic taste;

carbon, and oxygen in corroded pipes; fixture staining. water, affected by temperature and other factors

Fluoride 2.0 mg/L - 2 ppm Erosion of natural May produce tooth discoloration.

deposits

Foaming agents 0.5 mg/L 1000 500 ppb Municipal and industrial May produce froth; cloudiness;

waste discharge bitter taste; odor.

Iron 0.3 mg/L 1000 300 ppb Natural and industrial Use of water containing iron at

sources as well as aging concentrations above the and corroding secondary M CL may result in Distribution Systems and aesthetic issues, including the household pipes staining of laundry and plumbing

fixtures and water with an unpleasant metallic taste and rusty odor.

Chemical SMCL To convert for SMCL Source to Drinking Health and/or Aesthetic Effects (CASRN) CCR, multiply in CCR units W ater

by

5

Manganese 0.05 mg/L 1000 50 ppb (300 Natural sources as well Drinking water may naturally

(0.30 mg/L, ppb, ORSG as discharges from have manganese and, when ORSG) industrial uses concentrations are greater than 50

ppb, the water may be discolored and taste bad. Over a lifetime, the EPA recommends that people drink water with manganese levels less than 300 ppb and over the short term, EPA recommends that people limit their consumption of water with levels over 1000 ppb, primarily due to concerns about possible neurological effects. Children younger than one year old should not be given water with manganese concentrations over 300 ppb, nor should formula for infants be made with that water for more than a total of ten days throughout the year.

Odor 3 T.O.N. - 3 T.O.N. Naturally occurring May produce a "rotten-egg",

organic materials that musty, or chemical smell. form ions when in water; seawater influence

pH 6.5-8.5 - 6.5-8.5 Runoff and leaching Low pH may produce: bitter

from natural deposits; metallic taste; corrosion seawater influence High pH may produce a slippery

feel; soda taste; deposits.

Silver 0.10 mg/L 1000 100 ppb Naturally occurring May produce skin discoloration;

element graying of the white part of the

eye.

Sulfate 250 mg/L - 250 ppm Runoff and leaching May produce a salty taste.

from natural deposits; industrial wastes

Total dissolved solids 500 mg/L - 500 ppm Runoff and leaching May produce hardness; deposits; (TDS) from natural deposits; colored water; staining; salty

seawater influence taste.

Zinc 5 mg/L - 5 ppm Corrosion of household May produce a metallic taste.

plumbing systems; erosion of natural deposits

5 EPA has established a lifetime “Health Advisory” (HA) of 0.3 mg/L and an acute HA at 1.0 mg/L for Manganese and this HA contains a precautionary statement that "for infants younger than six months, the lifetime Health Advisory of 0.3 mg/L be used even for an acute exposure of ten days, because of the concerns for differences in manganese content in human milk and formula and the possibility of a higher absorption and lower excretion in young infants". MassDEP extended that age to one year out of concerns for formula use up to that age and the potential susceptibility of this early life stage to excessive manganese exposure and potential resultant toxicity.

Please go to http://water.epa.gov/drink/contaminants/secondarystandards.cfm for additional information on secondary contaminants.

1. (10) A record of the most recent asbestos repeat monitoring determination, including the monitoring results and other data supporting the determination, the Department's findings based on the supporting data and any additional bases for the determination and the repeat monitoring frequency; except that these records shall be maintained in perpetuity or until a more current repeat monitoring determination has been issued.
2. (11) Copies of the public notices issued pursuant to 310 CMR 22.16 and certifications made to the Department pursuant to 310 CMR 22.15(3)(b) shall be kept for three years after issuance.

3. (12) Each supplier of water who is subject to the requirements of 310 CMR 22.20F shall, in addition to recordkeeping requirements under 310 CMR 22.20A(6), maintain records as follows:

   1. (a) Individual Filter Turbidity Requirements. The results of individual filter monitoring, conducted in accordance with 310 CMR 22.20D(6)(b) and 22.20F(7)(a) through (e), must be kept for at least three years.
   2. (b) Disinfection Profiling. The results of the profile (including raw data and analysis), conducted in accordance with 310 CMR 22.20D(3)(b) and 22.20F(4)(a) through (g), must be kept indefinitely.
   3. (c) Disinfection Benchmarking. The benchmark (including raw data and analysis), conducted in accordance with 310 CMR 22.20D(3)(c) and 22.20F(5)(a) through (e), must be kept indefinitely.
4. (13) Copies of monitoring plans developed pursuant to 310 CMR 22.07F shall be kept for the same period of time as the records of analyses taken under the plan are required to be kept under 310 CMR 22.17(1), except as specified elsewhere in 310 CMR 22.17.