The following shall apply to Table 1703-1:

1. (a) The letter “a” shall indicate that the freshwater and saltwater aquatic life criteria for ammonia are shown in Env-Wq 1703.25 through Env-Wq 1703.32;
2. (b) The letter “b” shall indicate that the criteria refer to the inorganic form only;
3. (c) The letter “c” shall indicate that these criteria for the protection of human health are based on carcinogenicity using a target risk of one in 1,000,000, except for arsenic which shall be based on a target risk of one in 100,000, while the human health criteria without this footnote are based on systemic toxicity. Other target risks shall be allowed only as specified in Env-Wq 1703.20;

4. (d) The letter “d” shall indicate that criteria for these metals are expressed as a function of the water effect ratio (WER), and that because the values displayed in Table 1703-1 correspond to a WER of 1.0, metals criteria for different WERs shall be determined using the procedures described in the EPA publication “Interim Guidance on Determination and Use of Water-Effect Ratios for Metals”, EPA-823-B-94-001, dated February 1994, available as noted in Appendix B, provided that for copper, either of the following references, both available as noted in Appendix B, may also be used:

   1. (1) The “Streamlined Water-Effect Ratio procedure for Discharges of Copper”, EPA-822-R-01-005, dated March 2001; or
   2. (2) The Biotic Ligand Model, freshwater only, as described in “Aquatic Life Ambient Freshwater Quality Criteria - Copper”, EPA-822-R-07-001, dated February 2007;

5. (e) The letter “e” shall indicate that the following classes of compounds have 2 or more isomers and the appropriate aquatic life criteria apply to the sum of the concentrations of each isomer:

   1. (1) BHC;
   2. (2) Chlorinated benzenes;
   3. (3) Chlorinated naphthalenes;
   4. (4) Chloroalkyl ethers;
   5. (5) Dichlorobenzenes;
   6. (6) Dichloroethylenes;
   7. (7) Dichloropropanes;
   8. (8) Dichloropropenes;
   9. (9) Dinitrotoluenes;
   10. (10) Haloethers;
   11. (11) Halomethanes;
   12. (12) Nitrophenols;
   13. (13) Nitrosamines;
   14. (14) PCB;
   15. (15) Phthalate esters;
   16. (16) Polynuclear aromatic hydrocarbons;
   17. (17) Tetrachloroethanes; and
   18. (18) Trichlorinatedethanes;
6. (f) The letter “f” shall indicate that the freshwater aquatic criteria for these metals are expressed as a function of the total hardness, as mg/L CaCO3 of the surface water, and that because the values displayed in Table 1703-1 correspond to a total hardness of 20 mg/L the aquatic life criteria for other hardness values expressed as calcium carbonate shall be calculated using the equations and tables in Env-Wq 1703.23 and Env-Wq 1703.24;
7. (g) The letter “g” shall indicate that if the methylmercury concentration in the edible portion of the aquatic species of concern exceeds 0.3 mg/kg, a risk assessment shall be conducted to determine whether a consumption advisory should be issued for the surface water. If a consumption advisory is issued by the department, the surface water shall be considered in non-attainment of the fish or shellfish consumption designated uses and in violation of these surface water quality regulations;
8. (h) The letter “h” shall indicate that the freshwater aquatic life criteria for pentachlorophenol are expressed as a function of pH. Values displayed in Table 1703-1 correspond to a pH value of 6.5. For other pH values, the formulas shown in Env-Wq 1703.33 shall be used;
9. (i) The letter “i” shall indicate that the values presented for aquatic life protection are dissolved metals and for hardness-dependent metals are based on a hardness of 20 mg/L. To convert dissolved to total recoverable metal, the equations and tables in Env-Wq 1703.23 shall be used. To calculate dissolved or total recoverable fresh water criteria for hardness-dependent metals for hardness values other than 20 mg/l, the equations and tables shown in Env-Wq 1703.23 and Env-Wq 1703.24 shall be used;
10. (j) The letter “j” shall indicate that these human health criteria prevent taste and odor effects in the surface water and in fish and other aquatic life as prohibited in Env-Wq 1703.03(c)(1)c. and (3);

11. (k) The letter “k” shall indicate that the acute criteria are based on EPA’s 304(a) criteria in the 1980 documents listed below and were derived to be used as instantaneous maximum values, or to be applied after division by 2, to obtain a value comparable to an acute criterion as a 1-hour average when assessment is done using an averaging period:

    1. (1) Aldrin/Dieldrin, document number 440/5-80-019;
    2. (2) Chlordane, document number 440/5-80-027;
    3. (3) DDT, document number 440/5-80-038;
    4. (4) Endosulfan, document number 440/5-80-046;
    5. (5) Endrin, document number 440/5-80-047;
    6. (6) Gamma-BHC (lindane), document number 440/5-80-054;
    7. (7) Heptachlor, document number 440/5-80-052;
    8. (8) Hexachlorocyclohexane, document number 440/5-80-054; or
    9. (9) Silver, document number 440/5-80-071;

12. (l) The letter “l” shall indicate that there is a more stringent drinking water maximum contaminant level (MCL) specified in Env-Dw 700, so if the surface water is a source for a public water system as defined in RSA 485:1-a, XV or is within 20 miles upstream of any active surface water intake for a public water system, the department shall use the MCL values shown in Table 1703-2A, below, for the water and fish ingestion human health criteria. The following criteria shall be met as a running annual average except for Nitrite-N and Nitrite-N + Nitrate-N which shall be instantaneous acute criteria:

    Table 1703-2A: MCL Values for Water and Fish Ingestion Criteria

    CAS Number

    Chemical Name

    MCL

    (Units per Liter)

    15972-60-8

    Alachlor (Lasso)

    2 μg

    116-06-3

    Aldicarb (Temik)

    3 μg

    1646-87-3

    Aldicarb sulfoxide

    4 μg

    1646-88-4

    Aldicarb sulfone (aldoxycarb)

    2 μg

    1912-24-9

    Atrazine (Atranex, Crisazine)

    3 μg

    7440-41-7

    Beryllium

    4 μg

    7440-43-9

    Cadmium

    5 μg

    1563-66-2

    Carbofuran (Furadon, 4F)

    40 μg

    7782-50-5

    Chlorine (as Cl₂)

    4 mg

    10599-90-3

    Chloramines, as Cl2

    4 mg

    10049-04-4

    Chlorine Dioxide, as ClO2

    0.8 mg

    94-75-7

    Chlorophenoxy herbicides (2,4-D)

    70 μg

    93-72-1

    Chlorophenoxy herbicides (2,4,5-TP)

    50 μg

    18540-29-9

    Chromium+6

    see Chromium Total

    16065-83-1

    Chromium+3

    see Chromium Total

    7440-47-3

    Chromium Total (equal to the sum of Chromium+3 plus Chromium+6)

    100 μg

    75-99-0

    Dalapon

    200 μg

    96-12-8

    Dibromochloropropane (DBCP)

    0.2 μg

    95-50-1

    Dichlorobenzene (1,2)

    600 μg

    106-46-7

    Dichlorobenzene(1,4)

    75 μg

    107-06-2

    Dichloroethane (1,2)

    5 μg

    75-35-4

    Dichloroethylene(1,1)

    7 μg

    156-59-2

    Dichloroethylene (1,2-cis)

    70 μg

    156-60-5

    Dichloroethylene(1,2-Trans)

    100 μg

    88-85-7

    Dinoseb

    7 μg

    85-00-7

    Diquat

    20 μg

    103-23-1

    Di(2-ethylhexyl)adipate

    400 μg

    145-73-3

    Endothall

    100 μg

    106-93-4

    Ethylene Dibromide (EDB)

    0.05 μg

    16984-48-8

    Fluoride

    4 mg

    58-89-9

    gamma-BHC (Lindane)

    0.2 μg

    1071-83-6

    Glyphosate

    700 μg

    75-09-2

    Methylene Chloride

    5 μg

    1634-04-4

    Methyl tertiary-butyl ether (MtBE)

    13 μg

    14797-65-0

    Nitrite-N

    1 mg

    14797-55-8

    Nitrate-N

    10 mg

    14797-55-8

    +

    14797-65-0

    Nitrate-N + Nitrite-N

    10 mg

    23135-22-0

    Oxamyl (Vydate)

    200 μg

    355-46-4

    Perfluorohexane sulfonic acid (PFHxS)

    18 ng

    375-95-1

    Perfluorononanoic acid (PFNA)

    11 ng

    1763-23-1

    Perfluorooctane sulfonic acid (PFOS)

    15 ng

    335-67-1

    Perfluorooctanoic Acid (PFOA)

    12 ng

    1918-02-1

    Picloram

    500 μg

    7782-49-2

    Selenium

    50 μg

    122-34-9

    Simazine

    4 μg

    100-42-5

    Styrene

    100 μg

    71-55-6

    Trichloroethane 1,1,1

    200 μg

    1330-20-7

    Xylene, Total

    10 mg

13. (m) The letter “m” shall indicate that these criteria are expressed as micrograms of free cyanide per liter;
14. (n) The letter “n” shall indicate that these criteria apply to total PCBs or the sum of all of its congener, isomer, homolog, or Arochlor analyses;
15. (o) The letter “o” shall indicate that the freshwater aquatic life criteria for selenium are shown in Env-Wq 1703.34;
16. (p) The letter “p” shall indicate that these human health criteria for silver shall be for the protection of humans from argyria;
17. (q) The letter “q” shall indicate that this value is expressed as total cyanide;
18. (r) The letter “r” shall indicate that this data was derived from data for endosulfan and is most appropriately applied to the sum of alpha-endosulfan and beta-endosulfan;

19. (s) Subject to (1) and (2), below, the letter “s” shall indicate that this value is expressed as acid-soluble aluminum:

    1. (1) Where waterbody specific pH, dissolved organic carbon and hardness are available, sample specific total aluminum criteria shall be determined using the procedures described in the EPA publication “Final Aquatic Life Ambient Water Quality Criteria for Aluminum”, EPA-822-R-18-001, dated December 2018, available as noted in Appendix B, provided that for aluminum, either of the following references shall be used to calculate the site-specific criteria:

       1. a. The “Aluminum Criteria Calculator V2.0 (Excel)(xlsm)”, dated December 2018, available as noted in Appendix B; or
       2. b. The “Aluminum Criteria Calculator R Code and Data V2.0(R)”, dated November 15, 2019, available as noted in Appendix B; and
    2. (2) For characterizing ambient waters using the criteria in (1), above, analytical methods that measure the bioavailable fraction of aluminum may be used in accordance with this paragraph where permitted by applicable federal regulations. The bioavailable fraction of aluminum shall be measured, as scientifically appropriate, using a less aggressive initial acid digestion than done for total recoverable aluminum, such as to a pH of approximately 4 or lower, that includes the measurement of amorphous aluminum hydroxide yet minimizes the measurement of mineralized forms of aluminum such as aluminum silicates associated with suspended sediment particles or clays;
20. (t) The letter “t” shall indicate that the total concentration of DDT and its metabolites shall not exceed this value;
21. (u) The letter “u” shall indicate that the chronic criterion of 20 mg/L shall be the minimum value except where alkalinity is naturally lower, in which case the criterion shall not be lower than 25 percent of the natural level;
22. (v) Unless otherwise indicated in Env-Wq 1703.22 (k), (o), or Env-Wq 1703.26(c), the protection of aquatic life concentration values in Table 1703-1 are acute as a 1-hour average and chronic as a 4-day average, both of which shall not to be exceeded more than once in 3-years; and
23. (w) The letter “w” shall indicate that for arsenic, the first value is for freshwaters and the second value is for marine waters as it relates to protection of human health.

Source. (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16; ss by #14203, eff 2-26-25