N.H. Code Admin. R. Env-Wq 1703.21

Current through Register No. 25, June 20, 2024

Section Env-Wq 1703.21 - Water Quality Criteria for Toxic Substances

(a) Unless naturally occurring or allowed under Env-Wq 1707, all surface waters shall be free from toxic substances or chemical constituents in concentrations or combinations that:

(1) Injure or are inimical to plants, animals, humans or aquatic life; or

(2) Persist in the environment or accumulate in aquatic organisms to levels that result in harmful concentrations in:

a. Edible portions of fish, shellfish, other aquatic life, or

b. Wildlife that might consume aquatic life.

(b) Unless allowed under Env-Wq 1707 or naturally occurring, concentrations of toxic substances in all surface waters shall not exceed the recommended safe exposure levels of the most sensitive surface water use shown in Table 1703-1, subject to the notes in Env-Wq 1703.22, as follows:

Table 1703-1: Water Quality Criteria For Toxic Substances

CAS Number	Chemical Name	Protection of Aquatic Life Concentration in micrograms per liter (µg/l)				Protection of Human Health Units per Liter
CAS Number	Chemical Name	Fresh Acute Criteria	Fresh Chronic Criteria	Marine Acute Criteria	Marine Chronic Criteria	Water & Fish Ingestion	Fish Consumption Only
83329	Acenaphthene	1,700	520	970	710	20 µg ^j	20 µg ^j
107028	Acrolein	3	3	55	-	6 µg	400 µg
107131	Acrylonitrile	7,550	2,600	-	-	0.061 µg ^c	7 µg ^c
309002	Aldrin	3.0 ^k	-	1.3 ^k	-	0.049 ng ^c	0.05 ng ^c
N/A	Alkalinity	-	20,000 ^u	-	-	-	-
7429905	Aluminum	750 ^s	87^s	-	-	-	-
7664417	Ammonia ^a	Note a	Note a	Note a	Note a	-	-
62533	Aniline	28	14	77	37	-	-
120127	Anthracene	(see Polynuclear Aromatic Hydrocarbons)				8,300 µg	40,000 µg
7440360	Antimony	9,000	1,600	-	-	5.6 µg	640 µg
7440382	Arsenic	340 ^{d, i}	150 ^{d, i}	69 ^{d, i}	36 ^{d, i}	18 ng ^{b, c}	140 ng ^{b, c}
1332214	Asbestos	-	-	-	-	7,000,000 fibres ^c	-
7440393	Barium	-	-	-	-	1.0 mg	-
71432	Benzene	5,300	-	5,100	700	2.2 µg ^c	58 µg ^c
92875	Benzidine	2,500	-	-	-	0.14 ng ^c	11 ng ^c
56553	Benzo(a) Anthracene	(see Polynuclear Aromatic Hydrocarbons)				0.0038 µg ^c	0.018 µg ^c
50328	Benzo(a) Pyrene	(see Polynuclear Aromatic Hydrocarbons)				0.0038 µg ^c	0.018 µg ^c
205992	Benzo(b) Fluoranthene	(see Polynuclear Aromatic Hydrocarbons)				0.0038 µg ^c	0.018 µg ^c
192972	Benzo(e) Pyrene	(see Polynuclear Aromatic Hydrocarbons)				-	-
191242	Benzo(g,h,i) Perylene	(see Polynuclear Aromatic Hydrocarbons)				-	-
205823	Benzo(j) Fluoranthene	(see Polynuclear Aromatic Hydrocarbons)				-	-
207089	Benzo(k) Fluoranthene	(see Polynuclear Aromatic Hydrocarbons)				0.012 µg ^c	0.018 µg ^c
7440417	Beryllium	130	5.3	-	-	Note 1	-
N/A	BHC (Hexachloro-cyclohexane)	100 ^e	-	0.34 ^e	-	(see individual compounds)
319846	alpha-BHC	(see BHC)				2.6 ng ^c	4.9 ng ^c
319857	beta-BHC	(see BHC)				9.1 ng ^c	17 ng ^c
319868	delta-BHC	(see BHC)				0.0123 µg	0.0414 µg
58899	gamma-BHC (Lindane)	0.95	0.08	0.16 ^k	-	4.2 µg ^l	4.4 µg
608731	technical-BHC	(see Hexachlorocyclo-hexane-(Technical))				(see Hexachlorocyclo-hexane-(Technical))
111911	Bis (2-Chloroethoxy) methane	(see Chloroalkyl ethers)				-	-
111444	Bis (2-Chloroethyl) Ether	(see Chloroalkyl ethers)				0.03 µg ^c	2.2 µg ^c
108601	Bis (2-Chloroiso- propyl) ether	(see Chloroalkyl ethers)				1,400 µg	65,000 µg
117817	Bis (2-Ethylhexy)Phthalate	(see Phthalate esters)				1.2 µg ^c	2.2 µg ^c
75252	Bromoform	(see Halomethanes)				7 µg ^c	140 µg ^c
101553	4-Bromophenyl phenyl ether	(see Haloethers)				-	-
85687	Butyl benzyl phthalate	(see Phthalate esters)				1,500 µg	1,900 µg
7440439	Cadmium ⁱ	0.39 ^{f, d}	0.21 ^{f, d}	33 ^d	7.9 ^d	Note 1	-
63252	Carbaryl	2.1	2.1	1.6	-	-	-
56235	Carbon Tetrachloride	35,200	-	50,000	-	0.4 µg ^c	5 µg ^c
57749	Chlordane	2.4 ^k	0.0043 ^k	0.09 ^k	0.004 ^k	0.8 ng ^c	0.81 ng ^c
N/A	Chlorinated benzenes	250 ^e	50 ^e	160 ^e	129 ^e	(see individual compounds)
108907	Chlorobenzene	(See Chlorinated benzenes)				20 µg ^j	20 µg ^j
16887006	Chlorides	860,000	230,000	-	-	-	-
70776033	Chlorinated napthalenes	1,600^e	-	7.5^e	-	(see individual compounds)
7782505	Chlorine	19	11	13	7.5	Note 1	-
N/A	Chloroalkyl ethers	238,000^e	-	-	-	(see individual compounds)
111444	Chloroethyl ether (Bis-2)	see Bis (2-Chloroethyl) Ether				see Bis (2-Chloroethyl) Ether
110758	Chloroethyl vinyl ether-2	(see Chloroalkyl ethers)				-	-
124481	Chlorodibromomethane	(see Halomethanes)				0.8 µg ^c	21 µg ^c
111911	Chloroethoxy methane (Bis-2)	(see Bis (2-Chloroethoxy) methane)				(see Bis (2-Chloroethoxy) methane)
67663	Chloroform	28,900	1,240	(see Halomethanes)		60 µg ^c	2,000 µg ^c
108601	Chloroisopropyl ether (Bis-2)	see Bis (2-Chloroisopropyl) ether				see Bis (2-Chloroisopropyl) ether
59507	p-Chloro-m-cresol	(see 3-Methyl-4-chlorophenol)				(see 3-Methyl-4-chlorophenol)
542881	Chloromethyl ether (Bis)	(see Chloroalkyl ethers)				0.15 ng ^c	0.17 ng ^c
91587	Chloronaphthalene 2	(see Chlorinated naphthalenes)				1,000 µg	1,600 µg
95578	Chlorophenol 2	4,380	2,000	-	-	0.1 µg ^j	0.1 µg ^j
108430	Chlorophenol 3	-	-	-	-	0.1 µg ^j	0.1 µg ^j
106489	Chlorophenol 4	-	-	29,700	-	0.1 µg ^j	0.1 µg ^j
93721	Chlorophenoxy herbicides (2,4,5-TP)	-	-	-	-	100 µg ^l	-
94757	Chlorophenoxy herbicides (2,4-D)	-	-	-	-	1,300 µg ^l	-
7005723	Chlorophenyl phenyl ether 4	(see Haloethers)				-	-
2921882	Chlorpyrifos	0.083	0.041	0.011	0.0056	-	-
59507	Chloro-4 Methyl-3 Phenol	(see 3-Methyl-4-chlorophenol)				(see 3-Methyl-4-chlorophenol)
18540299	Chromium+6	16 ^{d, i}	11 ^{d, i}	1,100 ^{d, i}	50 ^{d, i}	note l	-
16065831	Chromium+3	152 ^{f, d, i}	19.8 ^{f, d ,i}	10,300	-	note l	-
218019	Chrysene	(see Polynuclear Aromatic Hydrocarbons)				0.12 µg ^c	0.13 µg ^c
7440508	Copper ⁱ	2.9 ^{f, d}	2.3 ^{f, d}	4.8 ^d	3.1 ^d	1,000 µg ^j	1,000 µg ^j
57125	Cyanide	22^m	5.2^m	1.0^m	1.0^m	140 µg ^q	140 µg ^q
72559	DDE(4,4')	1,050	-	14	-	0.22 ng ^c	0.22 ng ^c
72548	DDD(4,4')	0.6	-	3.6	-	0.31 ng ^c	0.31 ng ^c
50293	DDT(4,4')	1.1^{k, t}	0.001^{k, t}	0.13^{k, t}	0.001^{k, t}	0.22 ng ^c	0.22 ng ^c
8065483	Demeton	-	0.1	-	0.1	-	-
333415	Diazinon	0.17	0.17	0.82	0.82	-	-
53703	Dibenzo(a,h)Anthracene	(see Polynuclear Aromatic Hydrocarbons)				0.0038 µg ^c	0.018 µg ^c
84742	Dibutyl Phthalate	(see Di-n-butyl Phthalate)				(see Di-n-butyl Phthalate)
N/A	Dichlorobenzenes	1,120^e	763^e	1,970^e	-	(see individual compounds)
95501	Dichlorobenzene(1,2)	(see Dichlorobenzenes)				1,000 µg ^l	3,000 µg
541731	Dichlorobenzene(1,3)	(see Dichlorobenzenes)				320 µg	960 µg
106467	Dichlorobenzene(1,4)	(see Dichlorobenzenes)				300 µg ^l	900 µg
91941	Dichlorobenzidine(3,3^')	-	-	-	-	0.049 µg^c	0.15 µg ^c
75274	Dichlorobromomethane	(see Halomethanes)				0.95 µg ^c	27 µg ^c
75718	Dichlorodifluoromethane	(see Halomethanes)				6.9 mg ^c	570 mg ^c
107062	Dichloroethane(1,2)	118,000	20,000	113,000	-	9.9 µg ^c	650 µg ^c
25323302	Dichloroethylenes	11,600 ^e	-	224,000 ^e	-	(see individual compounds)
75354	Dichloroethylene(1,1)	(see Dichloroethylenes)				330 µg ^l	20,000 µg
156605	Dichloroethylene (1,2-Trans)	(see Dichloroethylenes)				140 µg ^l	10,000 µg
576249	Dichlorophenol(2,3)	-	-	-	-	0.04 µg ^j	0.04 µg ^j
120832	Dichlorophenol(2,4)	2,020	365	-	-	0.3 µg ^j	0.3 µg ^j
583788	Dichlorophenol(2,5)	-	-	-	-	0.5 µg ^j	0.5 µg ^j
87650	Dichlorophenol(2,6)	-	-	-	-	0.2 µg ^j	0.2 µg ^j
95772	Dichlorophenol(3,4)	-	-	-	-	0.3 µg ^j	0.3 µg ^j
26638197	Dichloropropanes	23,000 ^e	5,700 ^e	10,300 ^e	3,040 ^e	(see individual compounds)
78875	Dichloropropane(1,2)	(see Dichloropropanes)				0.9 µg ^c	31 µg ^c
26952238	Dichloropropenes	6,060 ^e	244 ^e	790 ^e	-	(see individual compounds)
542756	Dichloropropene(1,3)	(see Dichloropropenes)				0.34 µg ^c	21 µg ^c
60571	Dieldrin	0.24	0.056	0.71^k	0.0019^k	0.052 ng ^c	0.054 ng ^c
84662	Diethyl Phthalate	-	-	-	-	17 mg	44 mg
105679	Dimethyl Phenol(2,4)	1,300	530	270	110	380 µg	400 µg ^j
131113	Dimethyl Phthalate	(see Phthalate esters)				270 mg	1.1 g
84742	Di-n-butyl Phthalate	(see Phthalate esters)				2 mg	4.5 mg
N/A	Dinitrotoluenes	330 ^e	230 ^e	590 ^e	370 ^e	(see individual compounds)
121142	Dinitrotoluene(2,4)	(see Dinitrotoluenes)				0.11 µg ^c	3.4 µg ^c
606202	Dinitrotoluene(2,6)	(see Dinitrotoluenes)				-	-
N/A	Dinitro-o-cresol (2,4)	(see Nitrophenols)				13.4 µg	765 µg
534521	Dinitro-o-cresol (4,6)	(see 2 Methyl-4,6-Dinitrophenol)				(see 2 Methyl-4,6-Dinitrophenol)
25550587	Dinitrophenols	(see Nitrophenols)				69 µg	5,300 µg
51285	Dinitrophenol(2,4)	(see Nitrophenols)				69 µg	5,300 µg
117840	Di-n-octyl phthalate	(see Phthalate esters)				-	-
1746016	2,3,7,8-TCDD (Dioxin)	-	-	-	-	0.000005 ng ^c	0.0000051 ng ^c
122667	Diphenylhydrazine(1,2)	270	-	-	-	0.036 µg ^c	0.2 µg ^c
117817	Di-2-ethylhexyl phthalate	(see Bis (2-Ethylhexy)Phthalate				(see Bis (2-Ethylhexy)Phthalate
959988	alpha-Endosulfan	0.22 ^{k, r}	0.056 ^{k, r}	0.034 ^{k, r}	0.0087 ^{k, r}	62 µg	89 µg
33213659	beta-Endosulfan	0.22 ^{k, r}	0.056 ^{k, r}	0.034 ^{k, r}	0.0087 ^{k, r}	62 µg	89 µg
1031078	Endosulfan Sulfate	-	-	-	-	62 µg	89 µg
72208	Endrin	0.086	0.036	0.037 ^k	0.0023 ^k	0.059 µg	0.06 µg
7421934	Endrin Aldehyde	-	-	-	-	1 µg	1 µg
100414	Ethylbenzene	32,000	-	430	-	530 µg	2,100 µg
206440	Fluoranthene	(see Polynuclear Aromatic Hydrocarbons)				130 µg	140 µg
86737	Fluorene	(see Polynuclear Aromatic Hydrocarbons)				1,100 µg	5,300 µg
86500	Guthion	-	0.01	-	0.01	-	-
N/A	Haloethers	360 ^e	122 ^e	-	-	(see individual compounds)
N/A	Halomethanes	11,000 ^e	-	12,000 ^e	6,400 ^e	(see individual compounds)
76448	Heptachlor	0.52 ^k	0.0038 ^k	0.053 ^k	0.0036 ^k	0.079 ng ^c	0.079 ng ^c
1024573	Heptachlor Epoxide	0.52 ^k	0.0038 ^k	0.053 ^k	0.0036 ^k	0.039 ng ^c	0.039 ng ^c
67721	Hexachloroethane	980	540	940	-	1.4 µg ^c	3.3 µg ^c
118741	Hexachlorobenzene	(see Chlorinated benzenes)				0.28 ng ^c	0.29 ng ^c
87683	Hexachlorobutadiene	90	9.3	32	-	0.44 µg ^c	18 µg ^c
608731	Hexachlorocyclo-hexane-(Technical)	(see BHC)				0.0123 µg	0.0414 µg
77474	Hexachlorocyclopentadiene	7.0	5.2	7.0	-	1.0 ^j	1.0 ^j
193395	Ideno(1,2,3-cd)Pyrene	(see Polynuclear Aromatic Hydrocarbons)				0.0038 µg ^c	0.018 µg ^c
7439896	Iron	-	1,000	-	-	0.3 mg ^j	-
78591	Isophorone	117,000	-	12,900	-	35 µg ^c	1,800 µg ^c
7439921	Lead ⁱ	10.5 ^{f, d}	0.41 ^{f, d}	210 ^d	8.1 ^d	-	-
121755	Malathion	-	0.1	-	0.1	-	-
7439965	Manganese	-	-	-	-	50 µg ^j	100 µg
7439976	Mercury	1.4 ^{d, i}	0.77 ^{d, i}	1.8 ^{d, i}	0.94 ^{d, i}	0.05 µg	0.051 µg
72435	Methoxychlor	-	0.03	-	0.03	100 µg ^l	-
74839	Methyl Bromide	(see Halomethanes)				100 µg	10,000 µg
74873	Methyl Chloride	(see Halomethanes)				-	-
75092	Methylene Chloride	(see Halomethanes)				20 µg ^c	1,000 µg ^c
22967926	Methylmercury	see Mercury				-	0.3 mg/kg ^g
534521	2 Methyl-4,6-Dinitrophenol	(see Nitrophenols)				13 µg	280 µg
1570645	2-Methyl-4-chlorophenol	-	-	-	-	1,800 µg ^j	1,800 µg ^j
59507	3-Methyl-4-chlorophenol	30	-	-	-	3,000 µg ^j	3,000 µg ^j
615747	3-Methyl-6-chlorophenol	-	-	-	-	20 µg ^j	20 µg ^j
2385855	Mirex	-	0.001	-	0.001	-	-
91203	Naphthalene	2,300	620	2,350	-	-	-
7440020	Nickel ⁱ	120.0 ^{f, d}	13.3 ^{f, d}	74 ^d	8.2 ^d	610 µg	4,600 µg
14797558	Nitrates	-	-	-	-	10 mg	-
98953	Nitrobenzene	27,000	-	6,680	-	17 µg	30 µg^j
25154556	Nitrophenols	230 ^e	150 ^e	4,850 ^e	-	(see individual compounds)
88755	Nitrophenol 2	(see Nitrophenols)				-	-
100027	Nitrophenol 4	(see Nitrophenols)				-	-
N/A	Nitrosamines	5,850 ^e	-	3,300,000 ^e	-	0.8 ng	1.24 µg
924163	Nitrosodibutylamine N	(see Nitrosamines)				6.3 ng ^c	220 ng ^c
55185	Nitrosodiethylamine N	(see Nitrosamines)				0.8 ng ^c	1,240 ng ^c
62759	Nitrosodimethylamine N	(see Nitrosamines)				0.69 ng ^c	3 µg ^c
621647	Nitrosodi-n-propylamine N	(see Nitrosamines)				0.005 µg ^c	0.51 µg ^c
86306	Nitrosodiphenylamine N	(see Nitrosamines)				3.3 µg ^c	6 µg ^c
930552	Nitrosopyrrolidine N	(see Nitrosamines)				16 ng ^c	34,000 ng ^c
84852153	Nonylphenol	28	6.6	7	1.7	-	-
56382	Parathion	0.065	0.013	-	-	-	-
1336363	PCB	2.0 ^{e, n}	0.014 ^{e, n}	10.0^{e, n}	0.03^{e, n}	0.064 ng ^{c, n}	0.064 ng ^{c, n}
N/A	PCB-1242	(see PCB)				(see PCB)	(see PCB)
N/A	PCB-1254	(see PCB)				(see PCB)	(see PCB)
N/A	PCB-1221	(see PCB)				(see PCB)	(see PCB)
N/A	PCB-1248	(see PCB)				(see PCB)	(see PCB)
N/A	PCB-1260	(see PCB)				(see PCB)	(see PCB)
N/A	PCB-1016	(see PCB)				(see PCB)	(see PCB)
76017	Pentachloroethane	7,240	1,100	390	281	-	-
608935	Pentachlorobenzene	(see Chlorinated benzenes)				1.4 µg	1.5 µg
87865	Pentachlorophenol	5.28 ^h	4.05 ^h	13	7.9	0.27 µg ^c	3 µg ^c
85018	Phenanthrene	(see Polynuclear Aromatic Hydrocarbons)				-	-
108952	Phenol	10,200	2,560	5,800	-	300 µg ^j	300 µg ^j
N/A	Phthalate Esters	940 ^e	3 ^e	2,944 ^e	3.4 ^e	-	-
1336363	Polychlorinated Biphenyls	(see PCBs)				(see PCB)	(see PCB)
N/A	Polynuclear Aromatic Hydrocarbons	-	-	300 ^e	-	(see individual compounds)
129000	Pyrene	(see Polynuclear Aromatic Hydrocarbons)				830 µg	4,000 µg
7782492	Selenium	-	5	290^d,i	71^d,i	170 µg ^l	4,200 µg
7440224	Silver	0.20^{d,f, i}	-	1.9^d,i,k	-	105 µg ^p	65 mg ^p
7783064	Sulfide-Hydrogen Sulfide	-	2.0	-	2.0	-	-
95943	Tetrachlorobenzene 1,2,4,5	(see Chlorinated benzenes)				0.97 µg	1.1 µg
79345	Tetrachloroethane 1,1,2,2	(see Tetrachlor-oethanes)	2,400	9,020	-	0.2 µg ^c	4 µg ^c
25322207	Tetrachloroethanes	9,320 ^e	-	-	-	(see individual compounds)
127184	Tetrachloroethylene	5,280	840	10,200	450	10 µg ^c	29 µg ^c
935955	Tetrachlorophenol 2,3,5,6	-	-	440	-	-	-
58902	Tetrachlorophenol 2,3,4,6	-	-	-	-	1.0 µg ^j	1.0 µg ^j
7440280	Thallium	1,400	40	2,130	-	0.24 µg	0.47 µg
108883	Toluene	17,500	-	6,300	5,000	1.3 mg^l	15 mg
8001352	Toxaphene	0.73	0.0002	0.21	0.0002	0.70 ng ^c	0.71 ng ^c
N/A	Tributyltin (TBT)	0.46	0.072	0.42	0.0074	-	-
N/A	Trichlorinated Ethanes	18,000 ^e	-	-	-	(see individual compounds)
120821	Trichlorbenzene 1,2,4	(see Chlorinated benzenes)				35 µg	70 µg
71556	Trichloroethane 1,1,1	-	-	31,200	-	Note 1	-
79005	Trichloroethane 1,1,2	-	9,400	-	-	0.59 µg ^c	16 µg ^c
79016	Trichloroethylene	45,000	21,900	2,000	-	2.5 µg ^c	30 µg ^c
75694	Trichlorofluoromethane	(see Halomethanes)				10 mg	860 mg
95954	Trichlorophenol 2,4,5	-	-	-	-	1.0 µg ^j	1.0 µg ^j
88062	Trichlorophenol 2,4,6	-	970	-	-	1.5 µg ^c	2.0 µg ^{c, j}
75014	Vinyl Chloride	-	-	-	-	0.025 µg ^c	2.4 µg ^c
7440666	Zinc ⁱ	30.0 ^{f, d}	30.0 ^{f, d}	90^d	81^d	5,000 µg ^j	5,000 µg ^j

N.H. Code Admin. R. Env-Wq 1703.21

(See Revision Note #1 at chapter heading for Env-Wq 1700) #7151, eff 12-10-99; ss by #9034, INTERIM, eff 12-10-07; ss by #9162, eff 5-21-08 (See Revision Note #2 at chapter heading for Env-Wq 1700)

Amended by Volume XXXVI Number 49, Filed December 8, 2016, Proposed by #12042, Effective 12/1/2016, Expires 12/1/2026.