Statutes, codes, and regulations
Maine Administrative Code
Department 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTIONDivision 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL
Chapter 584 - SURFACE WATER QUALITY CRITERIA FOR TOXIC POLLUTANTS
Appendix 096-584-A

C.M.R. 06, 096, ch. 584, app 096-584-A

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Current through 2024-51, December 18, 2024
Appendix 096-584-A

Statewide criteria for toxic pollutants with national water quality criteria for Priority Pollutants and non Priority Pollutants. "FR Cite/Source" refers to the EPA publication from which the criteria are derived. The "Gold Book" is Quality Criteria for Water: 1986. EPA 440/5-86-001.

1. Table I. Criteria for Priority Pollutant listed pursuant to 304(a) of the Clean Water Act. See also the footnotes following this table.

Priority Pollutant CAS Number Freshwater Saltwater Human Health For Consumption of: Sustenance Fishing Waters Human Health For Consumption of: FR Cite/ Source
CMC (µg/L)CCC (µg/L)CMC (µg/L)CCC (µg/L)Water and Organisms (ug/L)Organisms Only (ug/L)Water and Organisms (ug/L)Organisms Only (ug/L)
Antimony 7440360 5.5 B, qq 350 B, qq 5 B, qq 56 B, qq 65FR66443
Arsenic 7440382 340 A, K 150 A, K 69 A, bb 36 A, bb 1.3 M, S, aME, qq 3.7 M, S, aME, qq 1.1, qq, M, S 2.6 qq, M, S 65FR31682 57FR60848
Beryllium 7440417 Z, qq qq Z, qq qq 65FR31682
Cadmium 7440439 0.40 E, mm 0.22 E, mm 33 7.9 Z, qq qq Z, qq qq 81FR19176
Chromium III 16065831 483 E, K 23.1 E, K Z Total, qq qq Z Total, qq qq EPA820/B-96-001 65FR31682
Chromium VI 18540299 16 K 11 K 1,108 bb 50 bb Z Total, qq qq Z Total, qq qq 65FR31682
Copper 7440508 3.07 E, K, cc, nn, oo 2.36 E, K, cc, nn, oo 5.78 cc, ff 3.73 cc, ff 1,300 U, qq qq 1,300 U, qq qq 65FR31682
Lead 7439921 10.52 E, bb, gg, rr 0.41 E, bb, gg, rr 221 bb 8.52 bb Z Z Z 65FR31682
Mercury 7439976 See Certain deposits and discharges prohibited, 38 M.R.S. §420(1-B) and § 413(11)
Nickel 7440020 120.2 E, K 13.4 E, K 75 bb 8.28 bb 400 B, qq 1,000 B, qq 123 B, qq 149 B, qq 65FR31682
Selenium 7782492 L, R 5.0 291 bb, dd 71 bb, dd 162 Z, qq 2,250, qq 118, qq 365, qq 62FR42160 65FR31682 65FR66443
Silver 7740224 0.23 G, E 2.24 G 65FR31682
Thallium 7440280 0.17, qq 0.25, qq 0.04 qq 0.04 qq 68FR75507
Zinc 7440666 30.6 E, K, ss 30.6 E, K 95 bb 86 bb 6,000 U, qq 14,000 U, qq 1,842 qq 2,234 qq 65FR31682 65FR66443
Cyanide 57125 22 K, Q 5.2 K, Q 1 Q, bb 1 Q, bb 4 qq 300 qq 4 qq 50 qq 80FR36986
Asbestos 1332214 7x106 fibers/L I 7x106 fibers/L I 57FR60848
2,3,7,8-TCDD Dioxin 1746016 Also see 38 M.R.S. §420(2) 2.7E-9 J, qq 2.8E-9 J, qq 4.5E-10 J, qq 4.5E-10 J, qq 65FR66443
Acrolein 107028 3 3 3 qq 200 qq 3 qq 40 qq 74FR46587 80FR36986
Acrylonitrile 107131 0.061 qq 4.6 qq 0.057 qq 0.74 qq 65FR66443 80FR36986
Benzene 71432 0.57 qq 10 qq 0.45 qq 1.7 qq IRIS 01/19/00 65FR66443 80FR36986
Bromoform 75252 6.8 qq 77 qq 4.6 qq 12 qq 65FR66443 80FR36986
Carbon Tetrachloride 56235 0.4 qq 3 qq 0.2 qq 0.5 qq 65FR66443 80FR36986
Chlorobenzene 108907 100 qq 600 qq 50 qq 90 qq 68FR75507 80FR36986
Chlorodibromomethane 124481 0.79 qq 14 qq 0.61 qq 2.2 qq 65FR66443 80FR36986
Chloroethane 75003
2-Chloroethylvinyl Ether 110758
Chloroform 67663 60 qq 2000 qq 50 qq 200 qq 80FR36986
Dichlorobromomethane 75274 0.93 qq 18 qq 0.73 qq 2.9 qq 65FR66443 80FR36986
1,1-Dichloroethane 75343
1,2-Dichloroethane 107062 9.9 qq 430 qq 8.8 qq 69 qq 65FR66443 80FR36986
1,1-Dichloroethylene 75354 300 qq 10000 qq 300 qq 2000 qq 80FR36986
1,2-Dichloropropane 78875 0.89 qq 20 qq 0.72 qq 3.3 qq 65FR66443 80FR36986
1,3-Dichloropropene 542756 0.26 qq 7.7 qq 0.22 qq 1.2 qq 80FR36986
Ethylbenzene 100414 53 qq 83 qq 12 qq 13 qq 80FR36986
Methyl Bromide 74839 100 qq 8000 qq 100 qq 1000 qq 65FR66443 80FR36986
Methyl Chloride 74873 65FR31682
Methylene Chloride 75092 20 qq 800 qq 10 qq 100 qq 65FR66443 80FR36986
1,1,2,2-Tetrachloroethane 79345 0.2 qq 2 qq 0.1 qq 0.3 qq 65FR66443 80FR36986
Tetrachloroethylene 127184 8.6 qq 19 qq 2.6 qq 3.1 qq 65FR66443 80FR36986
Toluene 108883 54 qq 340 qq 30 qq 55 qq 80FR36986
1,2-Trans-Dichloroethylene 156605 100 qq 2000 qq 100 qq 400 qq 80FR36986
1,1,1-Trichloroethane 71556 Z Z Z Z 65FR31682
1,1,2-Trichloroethane 79005 0.53 qq 5.8 qq 0.36 qq 0.95 qq 65FR66443 80FR36986
Trichloroethylene 79016 0.6 qq 4 qq 0.3 qq 0.7 qq 65FR66443 80FR36986
Vinyl Chloride 75014 0.022 qq 1.1 qq 0.02 qq 0.17 qq 80FR36986
2-Chlorophenol 95578 30 qq 500 qq 20 qq 90 qq 65FR66443 80FR36986
2,4-Dichlorophenol 120832 10 qq 40 qq 5 qq 6 qq 65FR66443 80FR36986
2,4-Dimethylphenol 105679 100 qq 2000 qq 90 qq 300 qq 65FR66443 80FR36986
2-Methyl-4,6-Dinitrophenol 534521 2 qq 20 qq 1 qq 3 qq 65FR66443 80FR36986
2,4-Dinitrophenol 51285 10 qq 200 qq 10 qq 40 qq 65FR66443 80FR36986
2-Nitrophenol 88755
4-Nitrophenol 100027
3-Methyl-4-Chlorophenol 59507 500 qq 2000 qq 200 qq 300 qq 80FR36986
Pentachlorophenol 87865 8.72 F, K 6.69 F, K 13 bb 7.9 bb 0.02 qq 0.02 qq 0.004 qq 0.004 qq 65FR66443 65FR31682 80FR36986
Phenol 108952 4,000 U, qq 200,000U, qq 4000 qq 30,000 qq 80FR36986
2,4,6-Trichlorophenol 88062 1.1 qq 1.8 qq 0.27 qq 0.3 qq 65FR66443 80FR36986
Acenaphthene 83329 50 qq 60 qq 9 qq 9 qq 65FR66443 80FR36986
Acenaphthylene 208968
Anthracene 120127 200 qq 200 qq 40 qq 40 qq 65FR66443 80FR36986
Benzidine 92875 0.00014 qq 0.0069 qq 0.00013 qq 0.0011 qq 65FR66443 80FR36986
Benzo(a)Anthracene 56553 0.00085 qq 0.00087 qq 0.00014 qq 0.00014 qq 65FR66443 80FR36986
Benzo(a)Pyrene 50328 0.000085 qq 0.000087 qq 0.000014 qq 0.000014 65FR66443 80FR36986
Benzo(b)Fluoranthene 205992 0.00085 qq 0.00087 qq 0.00014 qq 0.00014 qq 65FR66443 80FR36986
Benzo(ghi)Perylene 191242
Benzo(k)Fluoranthene 207089 0.0085 qq 0.0087 qq 0.0014 qq 0.0014 qq 65FR66443 80FR36986
Bis2-ChloroethoxyMethane 111911
Bis2-ChloroethylEther 111444 0.03 qq 1.4 qq 0.027 qq 0.23 qq 65FR66443 80FR36986
Bis2-ChloroisopropylEther 108601 200 qq 2000 qq 200 qq 400 qq 65FR66443 80FR36986
Bis2-EthylhexylPhthalateX 117817 0.22 qq 0.25 qq 0.04 qq 0.04 qq 65FR66443 80FR36986
4-BromophenylPhenylEther 101553
Butylbenzyl PhthalateW 85687 0.068 qq 0.068 qq 0.011 qq 0.011 qq 65FR66443 80FR36986
2-Chloronaphthalene 91587 600 qq 800 qq 100 qq 100 qq 65FR66443 80FR36986
4-ChlorophenylPhenylEther 7005723
Chrysene 218019 0.085 qq 0.087 qq 0.014 qq 0.014 qq 65FR66443 80FR36986
Dibenzo(a, h)Anthracene 53703 0.000085 qq 0.000087 qq 0.000014 qq 0.000014 qq 65FR66443 80FR36986
1,2-Dichlorobenzene 95501 1000 qq 2000 qq 300 qq 400 qq 80FR36986
1,3-Dichlorobenzene 541731 6 qq 9 qq 1 qq 2 qq 65FR31682 80FR36986
1,4-Dichlorobenzene 106467 300 qq 600 qq 80 qq 100 qq 80FR36986
3,3'-Dichlorobenzidine 91941 0.042 qq 0.097 qq 0.013 qq 0.016 qq 65FR66443 80FR36986
Diethyl PhthalateW 84662 400 qq 400 qq 70 qq 70 qq 65FR66443 80FR36986
Dimethyl PhthalateW 131113 1000 qq 1000 qq 200 qq 200 qq 65FR66443 80FR36986
Di-n-Butyl PhthalateW 84742 20 qq 20 qq 3 qq 3 qq 65FR66443 80FR36986
2,4-Dinitrotoluene 121142 0.048 qq 1.1 qq 0.039 qq 0.18 qq 65FR66443 80FR36986
2,6-Dinitrotoluene 606202
Di-n-Octyl Phthalate 117840
1,2-Diphenylhydrazine 122667 0.03 qq 0.1 qq 0.01 qq 0.02 qq 65FR66443 80FR36986
Fluoranthene 206440 10 qq 10 qq 2 qq 2 qq 65FR66443 80FR36986
Fluorene 86737 40 qq 50 qq 7 qq 7 qq 65FR66443 80FR36986
Hexachlorobenzene 118741 0.000052 qq 0.000052 qq 0.0000084 qq 0.0000084 qq 65FR66443 80FR36986
Hexachlorobutadiene 87683 0.006 qq 0.006 qq 0.001 qq 0.001 qq 65FR66443 80FR36986
Hexachlorocyclopentadiene 77474 2 qq 3 qq 0.4 qq 0.4 qq 80FR36986
Hexachloroethane 67721 0.08 qq 0.09 qq 0.01 qq 0.01 qq 65FR66443 80FR36986
Indeno(1,2,3-cd)Pyrene 193395 0.00085 qq 0.00087 qq 0.00014 qq 0.00014 qq 65FR66443 80FR36986
Isophorone 78591 34 qq 1200 qq 30 qq 200 qq 65FR66443 80FR36986
Naphthalene 91203
Nitrobenzene 98953 10 qq 400 qq 10 qq 60 qq 65FR66443 80FR36986
N-Nitrosodimethylamine 62759 0.00069 B, qq 1.63 B, qq 0.00068 B, qq 0.26 B, qq 65FR66443
N-Nitrosodi-n-Propylamine 621647 0.005 B, qq 0.27 B, qq 0.004 B, qq 0.04 B, qq 65FR66443
N-Nitrosodiphenylamine 86306 2.23 B, qq 3.24 B, qq 0.49 B, qq 0.53 B, qq 65FR66443
Phenanthrene 85018
Pyrene 129000 20 qq 20 qq 3 qq 3 qq 65FR66443 80FR36986
1,2,4-Trichlorobenzene 120821 0.048 qq 0.05 qq 0.008 qq 0.0081 qq 80FR36986
Aldrin 309002 3.0 G 1.3 G 0.00000051 qq 0.00000051 qq 0.000000082 qq 0.000000082 qq 65FR31682 65FR66443 80FR36986
alpha-BHC 319846 0.00024 qq 0.00026 qq 0.000041 qq 0.000041 qq 65FR66443 80FR36986
beta-BHC 319857 0.0062 qq 0.0093 qq 0.0014 qq 0.0015 qq 65FR66443 80FR36986
gamma-BHC (Lindane) 58899 0.95 K 0.16 G 2.8 qq 2.9 qq 0.47 qq 0.47 qq 80FR36986
delta-BHC 319868
Chlordane 57749 2.4 G 0.0043 G, aa 0.09 G 0.004 G, aa 0.00021 qq 0.00021 qq 0.000034 qq 0.000034 qq 65FR31682 65FR66443 80FR36986
4,4'-DDT 50293 1.1 G, ii 0.001 G, aa, ii 0.13 G, ii 0.001 G, aa, ii 0.00002 qq 0.00002 qq 0.0000032 qq 0.0000032 qq 65FR31682 65FR66443 80FR36986
4,4'-DDE 72559 0.000012 qq 0.000012 qq 0.0000019 qq 0.0000019 qq 65FR66443 80FR36986
4,4'-DDD 72548 0.000082 qq 0.000082 qq 0.000013 qq 0.000013 qq 65FR66443 80FR36986
Dieldrin 60571 0.24 K 0.056 K, O 0.71 G 0.0019 G, aa 0.00000082 qq 0.00000082 qq 0.00000013 qq 0.00000013 qq 65FR31682 65FR66443 80FR36986
alpha-Endosulfan 959988 0.22 G, Y 0.056 G, Y 0.034 G, Y 0.0087 G, Y 10 qq 20 qq 3 qq 3 qq 65FR31682 65FR66443 80FR36986
beta-Endosulfan 33213659 0.22 G, Y 0.056 G, Y 0.034 G, Y 0.0087 G, Y 20 qq 30 qq 4 qq 5 qq 65FR31682 65FR66443 80FR36986
Endosulfan Sulfate 1031078 20 qq 30 qq 4 qq 4 qq 65FR66443 80FR36986
Endrin 72208 0.086 K 0.036 K, O 0.037 G 0.0023 G, aa 0.02 qq 0.02 qq 0.004 qq 0.004 qq 80FR36986
Endrin Aldehyde 7421934 0.7 qq 0.8 qq 0.1 qq 0.1 qq 65FR66443 80FR36986
Heptachlor 76448 0.52 G 0.0038 G, aa 0.053 G 0.0036 G, aa 0.0000039 qq 0.0000039 qq 0.00000063 qq 0.00000063 qq 65FR31682 65FR66443 80FR36986
Heptachlor Epoxide 1024573 0.52 G, V 0.0038 G, V, aa 0.053 G, V 0.0036 G, V, aa 0.000021 B, qq 0.000021 B, qq 0.0000034 qq 0.0000034 qq 65FR31682 65FR66443 80FR36986
Polychlorinated Biphenyls PCBs 0.014 N, aa 0.03 N, aa 0.000035 B, N, qq 0.000035 B, N, qq 0.0000056 B, N, qq 0.0000056 B, N, qq 65FR31682 65FR66443
Toxaphene 8001352 0.73 0.0002 aa 0.21 0.0002 aa 0.00046 qq 0.00047 qq 0.000076 qq 0.000076 qq 65FR31682 65FR66443 80FR36986

Footnotes to Table I:

A. This recommended water quality criterion was derived from data for arsenic (III), but is applied here to total arsenic, which might imply that arsenic (III) and arsenic (V) are equally toxic to aquatic life and that their toxicities are additive. In the arsenic criteria document (EPA 440/5-84-033, January 1985), Species Mean Acute Values are given for both arsenic (III) and arsenic (V) for five species and the ratios of the SMAVs for each species range from 0.6 to 1.7. Chronic values are available for both arsenic (III) and arsenic (V) for one species; for the fathead minnow, the chronic value for arsenic (V) is 0.29 times the chronic value for arsenic (III). No data are known to be available concerning whether the toxicities of the forms of arsenic to aquatic organisms are additive.

B. This criterion has been revised to reflect The Environmental Protection Agency's q1* or RfD, as contained in the Integrated Risk Information System (IRIS) as of May 17, 2002. The fish tissue bioconcentration factor (BCF)from the 1980 Ambient Water Quality Criteria document was retained in each case.

E. The freshwater criterion for this metal is expressed as a function of hardness (mg/L) in the water column. The value given here corresponds to a hardness of 20 mg/L. Also see part 7 under "Additional Notes" after Table II.

F. Freshwater aquatic life values for pentachlorophenol are expressed as a function of pH, and are calculated as follows: CMC = exp(1.005(pH)-4.869);CCC = exp(1.005(pH)-5.134). Values displayed in table correspond to a pH of 7.0.

G. This Criterion is based on 304(a) aquatic life criterion issued in 1980, and was issued in one of the following documents: Aldrin/Dieldrin (EPA 440/5-80-019), Chlordane (EPA 440/5-80-027), DDT (EPA 440/5-80-038), Endosulfan(EPA440/5-80-046), Endrin(EPA440/5-047), Heptachlor(440/580-052), Hexachlorocyclohexane(EPA440/5-80-054), Silver (EPA 440/5-80-071). The Minimum Data Requirements and derivation procedures were different in the 1980 Guidelines than in the 1985 Guidelines. For example, a "CMC" derived using the 1980 Guidelines was derived to be used as an instantaneous maximum. If assessment is to be done using an averaging period, the values given should be divided by 2 to obtain a value that is more comparable to a CMC derived using the 1985 Guidelines.

I. This criterion for asbestos is the Maximum Contaminant Level (MCL) developed under the Safe Drinking Water Act.

J. These values are not applicable to bleach kraft pulp mills. See 38 M.R.S., section420(2)(I).

K. This recommended criterion is based on a 304(a) aquatic life criterion that was issued in the 1995 Updates: Water Quality Criteria Documents for the Protection of Aquatic Life in Ambient Water, (EPA-820-B-96-001, September 1996). This value was derived using the GLI Guidelines (60FR15393-15399, March 23, 1995; 40CFR 132 Appendix A); the difference between the 1985 Guidelines and the GLI Guidelines are explained on page iv of the 1995 Updates. None of the decisions concerning the derivation of this criterion were affected by any considerations that are specific to the Great Lakes.

L. The CMC = 1/[(f1/CMC1) + (f2/CMC2)] where f1 and f2 are the fractions of total selenium that are treated as selenite and selenate, respectively, and CMC1 and CMC2 are 185.9 µg/l and 12.83 µg/l, respectively.

M. EPA is currently reassessing the criteria for arsenic.

N. This criterion applies to total PCBs (e.g. the sum of all congener or all isomer or homolog or Aroclor analyses).

O. The derivation of the CCC for this pollutant did not consider exposure through the diet, which is probably important for aquatic life occupying upper trophic levels.

P. Although a new RfD is available in IRIS, the surface water criteria will not be revised until the National Primary Drinking Water Regulations: Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 DBPR) is completed, since public comment on the relative source contribution (RSC) for chloroform is anticipated.

Q. This recommended water quality criterion is expressed as µg free cyanide (as CN)/L.

R. This value for Selenium was announced (61FR58444-58449, November 14, 1996) as a proposed GLI 303(c) aquatic life criterion. EPA is currently working on this criterion and so this value might change substantially in the near future.

S. This recommended water quality criterion refers to the inorganic form only.

U. The organoleptic effect criterion is more stringent than the value for priority toxic pollutants. Also see Part 6.

V. This value was derived from data for heptachlor and the criteria document provides insufficient data to estimate the relative toxicities of heptachlor and heptachlor epoxide.

W. Although EPA has not published a final criteria document for this compound, it is EPA's understanding that sufficient data exist to allow calculation of aquatic criteria. It is anticipated that industry intends to publish in the peer reviewed literature draft aquatic life criteria generated in accordance with EPA Guidelines. EPA will review such criteria for possible issuance as national WQC.

X. There is a full set of aquatic life toxicity data that show that BEHP is not toxic to aquatic organisms at or below its solubility limit.

Y. This value was derived from data for endosulfan and is most appropriately applied to the sum of alpha- endosulfan and beta-endosulfan.

Z. A more stringent MCL has been issued. Also see part 6 below.

aa This criterion is based on a 304(a) aquatic life criterion issued in 1980 or 1986, and in one of the following documents: Aldrin/Dieldrin (EPA 440/5-80-019), Chlordane (EPA 440/5-80-027), DDT (EPA 440/5-80-038), Endrin (EPA 440/5-80-047), Heptachlor (EPA 440/5-80-052), Polychlorinated Biphenyls (EPA 440/5-80-019), Toxaphene (EPA 440/5-86-038). The CCC is currently based on the Final Residual Value (FRV) procedure. Since the publication of the Great Lakes Aquatic Criteria Guidelines in 1995 (60FR15393-15399, March 23, 1995), the Agency no longer uses the FRV procedure for deriving CCCs for new or revised 304(a) aquatic life criteria. Therefore, the Agency anticipates that future revisions of this CCC will not be based on the FRV procedure.

bb This water quality criterion is based on a 304(a) aquatic life criterion that was derived using the 1985 Guidelines (Guidelines for Deriving Numerical NationalWater Quality Criteria for the Protection of Aquatic Organisms and Their Uses, PB85-227049, January 1985) and was issued in one of the following criteria documents: Arsenic (EPA 440/5-84-033), Chromium (EPA 440/5-84-029), Copper (EPA 440/5-84-031), Cyanide (EPA 440/5-84-028), Lead (EPA 440/5-84-027), Nickel (EPA 440/5-86-004), Pentachlorophenol (EPA 440/5-86-009), Toxaphene, (EPA 440/5-86-006), Zinc (EPA 440/5-87- 003).

cc When the concentration of dissolved organic copper is elevated, copper is substantially less toxic and use of Water Effect Ratio might be appropriate.

dd The selenium criteria document (EPA 440/5-87-006, September 1987) provides that if selenium is as toxic to saltwater fishes in the field as it is to freshwater fishes in the field, the status of the fish community should be monitored whenever the concentration of selenium exceeds 5.0 µg/L in saltwater because the saltwater CCC does not take into account uptake via the food chain.

ff This recommended water quality criterion was derived in Ambient Water Quality Criteria Saltwater Copper Addendum (Draft, April 14, 1995) and was promulgated in the Interim final National Toxics Rule (60FR22228-222237, May 4, 1995).

gg EPA is actively working on this criterion and so this recommended water quality criterion may change substantially in the near future.

ii This criterion applies to DDT and it metabolites (i.e. the total concentration of DDT and its metabolites should not exceed this value).

jj. This criterion is expressed as total cyanide, even though the IRIS RfD used to derive the criterion is based on free cyanide. The multiple forms of cyanide that are present in ambient water have significant differences in toxicity due to their differing abilities to liberate the CN-moiety. Some complex cyanides require even more extreme condition the refluxing with sulfuric acid to liberate the CN-moiety. Thus these complex cyanides are expected to have little or no 'bioavailability' to humans. If a substantial fraction of the cyanide present in water body is present in a complex form (e.g. Fe4[Fe(CN)6]3), this recommended criterion may be over conservative.

aME As noted in 06-096 CMR 584.4 and CMR 584.5.C, when calculating ambient water quality (human health) criteria for inorganic arsenic, a 10-4 risk level and a state-wide consumption value of 138 grams of organisms per day shall be utilized. In waters subject to a designated use of sustenance fishing as specified under 38 MRS §465-A(1)(D), 38 MRS §467(7)(A)(B)(D) 38 MRS §467(13), 38 MRS §467(15)(C), 38 MRS §467(15)(A)(E)(F) 38 MRS §468(8), 38 MRS §469(7), a fish consumption rate of 200 grams per day shall be used. Other values specific to inorganic arsenic shall include a bioconcentration factor of 26 L/kg, a cancer slope (potency) factor of 1.75 mg/kg/day, and an inorganic factor of 30%.

mm. When calculating acute and chronic permit limits for the Androscoggin River, use a Water Effect Ratio (WER) of 1.3 for acute and 3.0 for chronic for cadmium. Rationale for the WERs is provided in Androscoggin River Water Effect Ratios (Integral Consulting Inc., April 13, 2015). WER is defined as an appropriate measure of the toxicity of a material obtained in on site water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

When calculating acute permit limits for the St. Croix River, use a Water Effect Ratio (WER) of 1.2 for acute for cadmium. Rationale for the WERs is provided in St. Croix River Water-Effect Ratios (Integral Consulting, Inc., July 2019). WER is defined as an appropriate measure of the toxicity of a material obtained in onsite water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

nn. When calculating acute and chronic permit limits for the Androscoggin River, use a Water Effect Ratio (WER) of 2.5 for acute and 2.5 for chronic for copper. The final WER for chronic copper was determined to be 3.5, however, 2.5 is used to prevent the chronic criteria from exceeding the acute criteria. Rationale for the WERs is provided in Androscoggin River Water Effect Ratios (Integral Consulting Inc., April 13, 2015). WER is defined as an appropriate measure of the toxicity of a material obtained in on site water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

When calculating acute permit limits for the St. Croix River, use a Water Effect Ratio (WER) of 3.0 for acute for copper. Rationale for the WERs is provided in St. Croix River Water-Effect Ratios (Integral Consulting, Inc., July 2019). WER is defined as an appropriate measure of the toxicity of a material obtained in onsite water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

oo. When calculating acute and chronic permit limits for total copper in the Little Androscoggin River from the outfall of the Paris Utility District in Paris, to the confluence of the Little Androscoggin River with the main stem Androscoggin River in Auburn, the ambient water quality criteria (AWQC) for acute exposure must be 10.85 micrograms per liter (µg/L) and the chronic AWQC must be 6.78 µg/L. Rationale for the previously noted AWQCs is based on the Biotic Ligand Model (BLM) that is summarized in the Board of Environmental Protection (BEP) Final Order for the Paris Utility District dated November 20, 2014. As stated in the aforementioned Final Order "The copper BLM calculates metal toxicity to aquatic organisms as a function of simultaneous concentrations of chemical constituents in water that can either compete with copper and render it biologically unavailable, or compete with copper for binding sites at the point of entry into a vulnerable organism."

qq. Human Health Ambient Water Quality Criteria: 2015 Update. EPA 820-F-15-001. It should be noted that EPA used a fish consumption rate of 22 g/day to calculate their 2015 values, however the criteria listed here are calculated using a fish consumption rate of 32.4 g/day, generally, and 200 g/day for waters subject to a designated use of sustenance fishing. It should also be noted that antimony, arsenic, barium, beryllium, cadmium, chromium (III or VI), copper, manganese, nickel, nitrates, nitrosamines, N-nitrosodibutylamine, N-nitrosodiethylamine, N-nitrosodipyrrolidine, N-nitrosodimethylamine, N-nitrosodi-n-propylamine, N-nitrosodiphenylamine, polychlorinated biphenyls (PCBs), selenium, thallium, zinc, or 2,3,7,8-TCDD (dioxin) were not included in the 2015 EPA update due to ongoing research.

rr. When calculating acute and chronic permit limits for the St. Croix River, use a Water Effect Ratio (WER) of 3.0 for acute and 4.8 for chronic for lead. Rationale for the WERs is provided in St. Croix River Water-Effect Ratios (Integral Consulting, Inc., July 2019). WER is defined as an appropriate measure of the toxicity of a material obtained in onsite water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

ss. When calculating acute permit limits for the St. Croix River, use a Water Effect Ratio (WER) of 2.0 for acute for zinc. Rationale for the WERs is provided in St. Croix River Water-Effect Ratios (Integral Consulting, Inc., July 2019). WER is defined as an appropriate measure of the toxicity of a material obtained in onsite water divided by the same measure of the toxicity of the same material obtained simultaneously in laboratory dilution water.

2. Table II. Criteria for Non-Priority Pollutants. See also the footnotes following this table.

Non Priority Pollutant CAS Number Freshwater Saltwater Human Health For Consumption of: Sustenance Fishing Waters Human Health For Consumption of: FR Cite/Source
CMC (ug/L)CCC (µg/L)CMC (ug/L)CCC (µg/L)Water and Organisms (ug/L)Organisms Only (µg/L)Water and Organisms (ug/L)Organisms Only (µg/L)
Aluminum pH 6.5 - 9.0 7429905 750 G, O, P 87 G, L, O, P 53FR33178
Ammonia 7664417 11,000 D 1,400 D 7,300 D 1,100 D EPA822-R-99-014 EPA440-588-004 EPA822-R-13-001
Barium 7440393 1,000 A, qq 1,000 A, qq Gold Book
Boron Narrative Statement - See document Gold Book
Carbaryl 63-25-2 2.1 2.1 1.6 77FR30280
Chloride 16887006 860,000 G 230,000 G 53FR19028
Chlorine 7782505 19 11 13 7.5 C Gold Book
Chlorophenoxy Herbicide 2,4,5, -TP 93721 100 qq 300 qq 40 qq 40 qq 80FR36986
Chlorophenoxy Herbicide 2,4,D 94757 1200 qq 8000 qq 670 qq 1300 qq 80FR36986
Chloropyrifos 2921882 0.083 G 0.041 G 0.011 G 0.0056 G Gold Book
Demeton 8065483 0.1 F 0.1 F Gold Book
Ether, Bis Chloromethyl 542881 0.00015 qq 0.011 qq 0.00014 qq 0.0018 qq 65FR66443 80FR36986
Guthion 86500 0.01 F 0.01 F Gold Book
Hexachlorocyclo-hexane-Technical 608731 0.0049 qq 0.0067 qq 0.001 qq 0.0011 qq 80FR36986 EPA 440/5-80-054
Iron 7439896 1000 F 300 A Gold Book
Malathion 121755 0.1 F 0.1 F Gold Book
Manganese 7439965 B, qq 100 A, qq B, qq 100 A, qq Gold Book
Methoxychlor 72435 0.03 F 0.03 F 0.01 qq 0.01 qq 0.002 qq 0.002 qq 80FR36986
Mirex 2385855 0.001 F 0.001 F Gold Book
Nitrates 14797558 10,000 A, qq qq 10,000 A, qq qq Gold Book
Nitrosamines 0.0008 A, qq 1.24 qq 0.0008 A, qq 1.24 qq Gold Book
Dinitrophenols 25550587 10 qq 700 qq 10 qq 100 qq 65FR66443 80FR36986
Nonylphenol 84852153 28 6.6 7 1.7 71FR9337
Nitrosodibutylamine, N 924163 0.0061 A, qq 0.118 A, qq 0.0048 A, qq 0.019 A, qq 65FR66443
Nitrosodiethylamine, N 55185 0.0008 A, qq 1.24 A, qq 0.0008 A, qq 1.24 A, qq Gold Book
Nitrosopyrrolidine, N 930552 0.016, qq 18.4, qq 0.016, qq 3.0, qq 65FR66443
Diazanon 333415 0.17 0.17 0.82 0.82 71FR9336
Parathion 56382 0.065 J 0.013 J Gold Book
Pentachlorobenzene 608935 0.07 qq 0.07 qq 0.01 qq 0.01 qq 65FR66443 80FR36986
Sulfide-Hydrogen Sulfide 7783064 2.0 F 2.0 F Gold Book
Tetrachlorobenzene,1,2,4,5- 95943 0.02 qq 0.02 qq 0.003 qq 0.003 qq 65FR66443 80FR36986
Tributyltin TBT 0.46 Q 0.072 Q 0.42 Q 0.0074 Q 69FR342
Trichloropheno1,2,4,5 95954 200 B, qq 400 B, qq 60 qq 60 qq 65FR66443 80FR36986

Footnotes to Table II:

A This human health criterion is the same as originally published in the Red Book (EPA 440/9-76-023, July 1976) which predates the 1980 methodology and did not utilize the fish ingestion BCF approach. This same criterion value is now published in the Gold Book (Quality Criteria for Water: 1986. EPA 440/5-86-001).

B The organoleptic effect criterion is more stringent than the value presented in the non priority pollutant table.

C A more stringent Maximum Contaminant Level (MCL) has been issued by EPA under the Save Drinking Water Act. Refer to drinking water regulations 40CFR 141 or Safe Drinking Water Hotline (1-800-426-4791) for values. Also see part 6 below.

D Total Ammonia Nitrogen Aquatic life criteria are pH, temperature and/or salinity dependent. See part 7(C) for fresh water and reference document for marine waters. The values presented in the table are based on pH of 7.0 and temperature of 25°C in fresh waters; and pH of 8.0, temperature of 20°C and salinity of 30 parts per thousand in marine waters.

F The derivation of this value is presented in the Red Book (EPA 440/9-76-023, July, 1976).

G This value is based on a 304(a) aquatic life criterion that was derived using the 1985 Guidelines (Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses, PB85-227049, January 1985) and was issued in one of the following criteria documents: Aluminum (EPA 440/5-86-008); Chloride (EPA 440/5-88-001); Chloropyrifos (EPA 440/5-86-005).

J This value is based on a 304(a)aquatic life criterion that was issued in the 1995 Updates: Water Quality Criteria Documents for the Protection of Aquatic Life in Ambient Water (EPA-820-B-96-001). This value was derived using the GLI Guidelines (60FR15393-15399, March 23, 1995; 40CFR 132 Appendix A); the differences between the 1985 Guidelines and the GLI Guidelines are explained on page iv of the 1995 Updates. No decision concerning this criterion was affected by any considerations that are specific to the Great Lakes.

L There are three major reasons why the use of Water-Effect Ratios might be appropriate. (1) The value of 87 µg/l is based on a toxicity test with the striped bass in water with pH= 6.5-6.6 and hardness <10 mg/L. Data in "Aluminum Water-Effect Ratio for the 3M Plant Effluent Discharge, Middleway, West Virginia" (May 1994) indicate that aluminum is substantially less toxic at higher pH and hardness, but the effects of pH and hardness are not well quantified at this time. (2) In tests with the brook trout at low pH and hardness, effects increased with increasing concentrations of total aluminum even though the concentration of dissolved aluminum was constant, indicating that total recoverable is a more appropriate measurement than dissolved, at least when particulate aluminum is primarily aluminum hydroxide particles. In surface waters, however, the total recoverable procedure might measure aluminum associated with clay particles, which might be less toxic than aluminum associated with aluminum hydroxide. (3) EPA is aware of field data indicating that many high quality waters in the U.S. contain more than 87 µg aluminum/L, when either total recoverable or dissolved is measured.

N This value was announced (62FR42554, August 7, 1997) as a proposed 304(a) aquatic life criterion. Although EPA has not responded to public comment, EPA has published this as a 304(a) criterion as guidance for States and Tribes to consider when adopting water quality criteria.

O When calculating acute and chronic permit limits for the Androscoggin River, use a Water Effect Ratio (WER) of 1.3 for acute and 3.7 for chronic for aluminum. Rationale for the WERs is provided in Androscoggin River Water Effect Ratios (Integral Consulting Inc., April 13, 2015).

P When calculating acute and chronic permit limits for the St. Croix River, use a Water Effect Ratio (WER) of 6.1 for aluminum. Rationale for the WER is provided in Aluminum Water-Effect Ration for Georgia-Pacific Corporation Woodland, Maine Pulp & Paper Operations Discharge and St. Croix River prepared by AScI Corporation/AScI-Duluth dated November 1996, and summarized in the letter from William R. Beckwith of EPA Region 1 to Barry Mower, DEP, dated March 2, 1998.

ADDITIONAL NOTES

3. Criteria Maximum Concentration and Criterion Continuous Concentration

The Criteria Maximum Concentration (CMC) is an estimate of the highest concentration of a material in surface water to which an aquatic community can be exposed briefly without resulting in an unacceptable effect. The Criterion Continuous Concentration (CCC) is an estimate of the highest concentration of a material in surface water to which an aquatic community can be exposed indefinitely without resulting in an unacceptable effect. The CMC and CCC are just two of the six parts of an aquatic life criterion; the other four parts are the acute averaging period, chronic averaging period, acute frequency of allowed exceedence, and chronic frequency of allowed exceedence. Because 304(a) aquatic life criteria are national guidance, they are intended to be protective of the vast majority of the aquatic communities in the United States.

4. Criteria Recommendations for Priority Pollutants, Non Priority Pollutants

This compilation lists all priority toxic pollutants and some non priority toxic pollutants, and both human health effect and aquatic organism effect criteria issued pursuant to CWA §304(a). Blank spaces indicate that EPA has no CWA §304(a) criteria recommendations. For a number of non-priority toxic pollutants not listed, CWA §304(a) "water + organism" human health criteria are not available, but EPA has published MCLs under the SDWA that may be used in establishing water quality standards to protect water supply designated uses. Because of variations in chemical nomenclature systems, this listing of toxic pollutants does not duplicate the listing in Appendix A of 40 CFR Part 423. Also listed are theChemical Abstracts Service CAS registry numbers, which provide a unique identification for each chemical.

5. Water Quality Criteria published pursuant to Section 304(a) or Section 303(c) of the CWA

Many of the values in the compilation were published in the California Toxics Rule. Although such values were published pursuant to Section 303(c) of the CWA, they represent the EPA's most recent calculation of water quality criteria and are thus the Agency's 304(a) criteria.

6. Maximum Contaminant Levels and Organoleptic Effects

The compilation includes footnotes for pollutants with Maximum Contaminant Levels (MCLs) more stringent than the recommended water quality criteria in the compilation. MCLs for these pollutants are not included in the compilation, but can be found in the appropriate drinking water regulations (10-144 CMR Chapter 231, 40 CFR 141.11-16 and 40 CFR 141.60-63). In addition to toxic effects, some pollutants impart organoleptic effects (e.g., taste and odor) that may impair uses of the waters of the State by making water and edible aquatic life unpalatable but not toxic to humans. Pollutants with organoleptic effect criteria more stringent than the criteria based on toxicity (e.g., included in both the priority and non-priority pollutant tables) are footnoted as such. For both MCL and organoleptic effects, the Department will consider all available information regarding such characteristics in regulating the discharge of pollutant to ensure the uses of the waters of the State are protected in all respects.

7. Specific Chemical Calculations

A. Selenium Aquatic Life

This compilation contains aquatic life criteria for selenium that are the same as those published in the proposed CTR. In the CTR, EPA proposed an acute criterion for selenium based on the criterion proposed for selenium in the Water Quality Guidance for the Great Lakes System (61 FR 58444). The GLI and CTR proposals take into account data showing that selenium's two prevalent oxidation states in water, selenite and selenate, present differing potentials for aquatic toxicity, as well as new data indicating that various forms of selenium are additive. The new approach produces a different selenium acute criterion concentration, or CMC, depending upon the relative proportions of selenite, selenate, and other forms of selenium that are present. EPA is currently undertaking a reassessment of selenium, and expects the 304(a) criteria for selenium will be revised based on the final reassessment (63FR26186). However, until such time as revised water quality criteria for selenium are published by the Agency, the recommended water quality criteria in this compilation are EPA's current 304(a) criteria.

B. Parameters for Calculating Freshwater Metals Criteria That Are Hardness-Dependent

Chemical mA bAmC bC
Cadmium 0.97899 -3.866 0.7977 -3.909
Chromium III 0.8190 3.7256 0.8190 0.6848
Copper 0.9422 1.700 0.8545 -1.702
Lead 1.273 -1.460 1.273 -4.705
Nickel 0.8460 2.255 0.8460 0.0584
Silver 1.72 -6.59 -- --
Zinc 0.84730.8840.84730.884

Hardness-dependant metals' criteria, as total metal, may be calculated from the following.

CMC = exp{mA [ln(hardness)] + bA}

CCC = exp{mC [ln(hardness)] + bC}

A conversion factor for freshwater cadmium criteria is then applied to the above stated calculation for CCC and CMC as stated in EPA's Aquatic Life Ambient Water Quality Criteria for Cadmium (EPA-820-R-16-002) dated March 2016. Freshwater acute and chronic conversion factors for cadmium are 1.011 and 0.976, respectively.

C. Calculation of Freshwater Ammonia Criterion

Freshwater Ammonia criterion is derived from Aquatic Life Ambient Water Quality Criteria for Ammonia-Freshwater (EPA 822-R-18-002) dated April 2013. Criteria frequency may not be exceeded more than once in three years on average. Chronic criteria (30-day rolling average), may not exceed 2.5 times the criterion continuous concentration as a 4-day average within a 30-day period.

C.M.R. 06, 096, ch. 584, app 096-584-A