Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 584 - SURFACE WATER QUALITY CRITERIA FOR TOXIC POLLUTANTS › Appendix 096-584-A

Current through 2024-29, July 17, 2024
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
bA
mC
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
1.7
2 -6.59
--
--
Zinc
0.8473
0.884
0.8473
0.884
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.