(1) (a) Except where a different reporting period is specified in 310 CMR 22.00, each Supplier of Water shall report to the Department within 48 hours every failure to comply with any of 310 CMR 22.00 applicable to the Supplier of Water, including failure to comply with any monitoring requirement applicable to the Supplier of Water pursuant to any of 310 CMR 22.00 and every failure to comply with a Treatment Technique approved by the Department.

1. (b) Nitrate Reporting Requirements. With regard to nitrate, a Supplier of Water shall notify the Department of Public Health and local public health authorities within 30 days of the date the Public Water System first learns of an analysis taken for purposes of 310 CMR 22.06 which indicates nitrate levels in excess of 10 mg/L.
2. (c) Except where a different reporting period is specified in 310 CMR 22.00, for each acute contaminant specified in 310 CMR 22.16: Table 3, or where a single sample result is greater than four times the MCL, each Supplier of Water shall report to the Department an MCL exceedance on the same business day that the Supplier of Water becomes aware of the test results. If the Supplier of Water receives such notification outside of the Department's regular business hours, then the Supplier of Water shall notify and consult with the Department on the next business day. In cases where the Supplier of Water receives such notification, and the following day is a non-business day then it shall provide notification to the Department by calling the Department's Emergency notification telephone number and using any other electronic reporting tool designated by the Department, or other Department designated numbers no later than 24 hours after it receives such notification from the laboratory.
3. (d) A system must notify the Department as soon as possible but no later than the end of the day (i.e. prior to midnight) when the system learns of an E. coli MCL violation, in accordance with 310 CMR 22.05(12)(a)1.a., and must notify the public in accordance with 310 CMR 22.16.

(2) Unless a shorter reporting period is prescribed elsewhere in 310 CMR 22.00, the Supplier of Water shall report to the Department the results of every test, measurement or analysis the Supplier of Water is required by 310 CMR 22.00 to make within the shorter of the following time periods:

1. (a) the first ten days following the month in which the results are received; or
2. (b) the first ten days following the end of the required monitoring period as stipulated by the Department.

(3) (a) The Supplier of Water is not required to report analytical results to the Department in cases where a Department laboratory performs the analysis.

1. (b) The Supplier of Water within ten days of completing the public notification requirements under 310 CMR 22.16 for the initial public notice and any repeat notices, shall submit to the Department and local Board of Health a certification that it has fully complied with the public notification regulations. The Supplier of Water shall include with this certification a representative copy of each type of notice distributed, published, posted, and made available to the Persons served by the system and to the media.
2. (c) When requested, the Supplier of Water shall submit to the Department within the time specified copies of any records required to be maintained under 310 CMR 22.15 or copies of any documents then in existence which the Department is entitled to inspect pursuant to 310 CMR 22.00.

(5) Annual Statistical Report. Every Supplier of Water shall report electronically to the Department annually, by the due date specified each year on a form prescribed by the Department, full and complete information describing the operation of the Public Water System during the prior year, including but not limited to, the amount of water that passes through their Distribution Systems during the preceding calendar year. A Supplier of Water may request, on a form provided by the Department, approval for a hardship exemption from electronic reporting for the annual report due that year, based on a lack of internet access or service. If granted, the Supplier of Water shall make a paper filing for that year using a form provided by the Department. In no event shall the Supplier of Water fail to file the annual report by the due date specified above. Such reports shall include, at a minimum, the following:

1. (a) a monthly breakdown of the amount of water:

   1. 1. purchased from other Public Water Systems;
   2. 2. sold to other Public Water Systems;
   3. 3. sold or otherwise supplied to other consumers; and
   4. 4. withdrawn from each source.

2. (b) an annual breakdown, to the extent known to the Supplier of Water, of the amount of water furnished during the year to each of the following classes of users:

   1. 1. residential users;
   2. 2. agricultural users;
   3. 3. commercial users;
   4. 4. industrial users;
   5. 5. other Public Water Systems; and
   6. 6. unaccounted for.
3. (c) Total number of users served by the system.
4. (d) Total number of days the system is operating during the calendar year.
5. (e) Any updates to the Public Water Systems' Emergency Response Plan prepared in accordance with 310 CMR 22.04(13).
6. (f) Names and Grades of Certified Operators.

(7) For each sample analyzed under 310 CMR 22.00, for which the Department requires a submittal or report, every Supplier of Water shall submit or report to the Department the following information:

1. (a) Results of all analytical methods, including negatives;
2. (b) Name and address of the system that supplied the sample;
3. (c) Contaminant(s);
4. (d) Analytical method(s) used;
5. (e) Date of sample collection and time of sample collection (if applicable);
6. (f) Date of analysis;
7. (g) Laboratory name and certification number, including subcontracting laboratories;
8. (h) Method Detection or other Reporting Limits;
9. (i) Name of sample collector;
10. (j) QA/QC information, where applicable;
11. (k) Point of sample collection;
12. (l) Department assigned sample location identifier;
13. (m) Laboratory assigned sample identification number(s).

(8) Notification of Imposition of Mandatory Water Use Restrictions and Local Drinking Water Health Advisory.

1. (a) All Public Water Systems establishing a mandatory restriction on water use must notify the Department in writing within 14 days of its effective date. In its notice to the Department, the Public Water System establishing a mandatory restriction on water use shall include appropriate regulations, bylaws or ordinances establishing and imposing the restriction.
2. (b) Public Water Systems establishing water use restrictions should consider requesting from the Department a declaration of a state of water supply Emergency pursuant to M.G.L. c. 21G.
3. (c) Public Water Systems who would issue a local drinking water health advisory shall consult with and notify the Department prior to issuance and provide notification to the Department within 24 hours of termination. At a minimum, all local drinking water health advisories for contaminants regulated by 310 CMR 22.00 shall include the required public notice content information listed at 310 CMR 22.16(5)(a).

(9) Emergency Reporting.

1. (a) Except as otherwise determined by the Department in writing, each public water supplier shall notify the Department and its local Board of Health as soon as possible, but not more than two hours after obtaining knowledge of a potential or actual Emergency described in 310 CMR 22.15(9)(b)1., by calling the Department's Emergency notification telephone number or using any other electronic reporting tool designated by the Department, unless the water supplier establishes, by a preponderance of the evidence, that extenuating circumstances prevented notification within such two hour time period. Except as otherwise determined by the Department in writing, each public water supplier shall notify the Department and its local Board of Health as soon as possible but not more than 24 hours after obtaining knowledge of all other potential or actual Emergencies, including those described in 310 CMR 22.15(9)(b)2., by calling the Department's Emergency notification telephone number and using any other electronic reporting tool designated by the Department, unless the water supplier establishes, by a preponderance of the evidence, that extenuating circumstances prevented notification within such 24 hour time period. In the event of such extenuating circumstances, notification to the Department shall be made as soon as possible thereafter, taking into account the extenuating circumstances. Extenuating circumstances shall include, without limitation, the following:

   1. 1. A lack of reasonably available communication equipment at the site of the Emergency;
   2. 2. A need to take action prior to notification in order to mitigate or prevent an actual or potential threat to public health or safety; and/or
   3. 3. A physical injury to the Person responsible for notifying caused by or associated with the Emergency when the injury reasonably prevents that Person from notifying.

2. (b) Emergency reporting is required after the occurrence of any of the following incidents or Emergencies that result in the consumers of the system receiving water that does not meet required or routine quantity or quality conditions:

   1. 1. Emergencies or incidents requiring notification within two hours:

      1. a. Loss of water or drop in pressure to less than 20 psi, affecting 50% or more of consumers for a system serving less than 10,000 persons;
      2. b. Loss of water or drop in pressure to less than 20 psi, affecting 5,000 or more consumers for a system serving 10,000 or more persons;
      3. c. Chemical or microbiological contamination of the water supply in exceedence of limits specified by the Department's Office of Research and Standards (ORS), as set forth in ORS' Immediate Action Levels for Water Treatment Plant Chemicals (available on-line at: http://www.mass.gov/eea/agencies/massdep/water/regulations/immediate-action-l evels-water-treatment-plant-chemicals.html);
      4. d. Discovery of malicious intent or an act of vandalism, which may impact a system component;
      5. e. Any consumer complaint in which the water may have caused physical injury;
      6. f. A pattern of unusual customer complaints about the water quality such as taste, odor, etc.; and
      7. g. Any other Emergency as determined by the Department in writing.

   2. 2. Emergencies or incidents requiring notification within 24 hours:

      1. a. Loss of water supply from a source;
      2. b. Loss of water supply due to major component failure;
      3. c. Damage to power supply equipment or loss of power;
      4. d. Contamination of water in the Distribution System from backflow or cross connection incident;
      5. e. Collapse of a reservoir, reservoir roof, or pump house structure;
      6. f. Break in a transmission or distribution line that results in a loss of service or drop in pressure to less than 20 psi to more than 100 consumers for more than four hours;
      7. g. Chemical or microbiological contamination of the water supply, not specified in 310 CMR 22.15(9)(b)1.c.; and
      8. h. Any other failure or potential failure of part or all of the water supply system not listed in 310 CMR 22.15(9)(b)2. that may lead to an Emergency as defined in 310 CMR 22.02.

3. (c) Unless otherwise determined by the Department in writing, a water supplier must file an Emergency Response Report within 30 days of any of the Emergencies identified in 310 CMR 22.04(13)(a), a Level III or higher Emergency, as described in Massachusetts Drinking Water Guidelines and Policies for Public Water Supplies, Appendix O - Handbook for Water Supply Emergencies, or any cross connection problem that results in contamination of the water provided by the Public Water System. The Emergency Response Report must include the following information at a minimum:

   1. 1. Detailed timeline of the incident and response;
   2. 2. Evaluation of the incident;
   3. 3. Recommendations for improvements to Emergency response planning, training and communication;
   4. 4. Recommendations for improvements to water system operations, staffing and budget;
   5. 5. Timeline for making all recommended changes;
   6. 6. Updated Emergency response plan except for those items that are security sensitive; and
   7. 7. A completed Emergency Response Checklist. (A copy of the Emergency Response Checklist form is contained in the Massachusetts Drinking Water Guidelines and Policies for Public Water Supplies, Appendix O - Handbook for Water Supply Emergencies, Attachment E).
4. (d) Unless otherwise determined by the Department in writing, a water supplier must complete an Emergency Response Checklist within ten days of any Level I or II Emergency, as described in Massachusetts Drinking Water Guidelines and Policies for Public Water Supplies, Appendix O - Handbook for Water Supply Emergencies, and maintain on file for five years for the Department's review.

5. (e) Each water supplier must annually submit to the Department all updates to its Emergency Response Plan made during the year, except for those items that are security sensitive. At a minimum the annual update must include:

   1. 1. An updated Emergency contact list; and
   2. 2. A list and description of all Emergency response training provided to system personnel and local partners during the year.