N.H. Admin. Code § Env-Dw 811.25

Current through Register No. 50, December 12, 2024

Section Env-Dw 811.25 - Converting MCL Water Quality Compliance Values

(a) The MCL, MRDL, MCLG, and MRDLG for a contaminant shall be expressed in identical units as a number equal to or greater than 1.0, as specified in table 811-2, below, subject to the notes in (b), below:

Table 811-2: Converting MCL Water Quality Compliance Values

Contaminant	Traditional MCL in compliance units (mg/L)	To convert to a whole number, Multiply by...	MCL in CCR units	MCLG in Whole Numbers
Microbiological Contaminants
Total Coliform Bacteria	TT	TT	0
Turbidity	TT	TT (NTU)	n/a
E. coli	Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total coliform-positive repeat sample for E. coli	Routine and repeat samples are total coliform-positive and either is E. coli-positive or system fails to take repeat samples following E. coli-positive routine sample or system fails to analyze total coliform-positive repeat sample for E. coli	0
Total Organic Carbon	TT	TT (ppm)	n/a
Radioactive Contaminants
Beta/photon emitters	4 mrem/yr	4 mrem/yr	0
Alpha emitters	15 pCi/L	15 pCi/L	0
Combined radium	5 pCi/L	5 pCi/L	0
Uranium	30 ug/L	30 ug/L	0
Inorganic Contaminants
Antimony	0.006	1,000	6 ppb	6
Arsenic	0.010	1,000	10 ppb	0
Asbestos	7 MFL	7 MFL	7
Barium	2	2 ppm	2
Beryllium	0.004	1,000	4 ppb	4
Bromate	0.010	1,000	10 ppb	0
Cadmium	0.005	1,000	5 ppb	5
Chloramines	MRDL = 4	MRDL = 4 ppm	MRDLG = 4
Chlorine	MRDL = 4	MRDL = 4 ppm	MRDLG = 4
Chlorine dioxide	MRDL = 0.8	1,000	MRDL = 800 ppb	MRDLG = 800
Chlorite	1	1 ppm	0.8
Chromium	0.1	1,000	100 ppb	100
Copper	AL=1.3	AL=1.3 ppm	1.3
Cyanide	0.2	1,000	200 ppb	200
Fluoride	4.0	4.0 ppm	4.0
Lead	AL=0.015	1,000	AL=15 ppb	0
Mercury (inorganic)	0.002	1,000	2 ppb	2
Nitrate (as Nitrogen)	10	10 ppm	10
Nitrite (as Nitrogen)	1	1 ppm	1
Selenium	0.05	1,000	50 ppb	50
Thallium	0.002	1,000	2 ppb	0.5
Synthetic Organic Contaminants, including Pesticides and Herbicides
2,4-D	0.07	1,000	70 ppb	70
2,4,5-TP (Silvex)	0.05	1,000	50 ppb	50
Acrylamide	TT	TT (ppm)	0
Alachlor	0.002	1,000	2 ppb	0
Atrazine	0.003	1,000	3 ppb	3
Benzo(a)pyrene (PAH)	0.0002	1,000,000	200 ppt	0
Carbofuran	0.04	1,000	40 ppb	40
Chlordane	0.002	1,000	2 ppb	0
Dalapon	0.2	1,000	200 ppb	200
Di(2-ethylhexyl) adipate	0.4	1,000	400 ppb	400
Di(2-ethylhexyl) phthalate	0.006	1,000	6 ppb	0
Dibromochloropropane	0.0002	1,000,000	200 ppt	0
Dinoseb	0.007	1,000	7 ppb	7
Diquat	0.02	1,000	20 ppb	20
Dioxin [2,3,7,8-TCDD]	0.00000003	1,000,000,000	30 ppq	0
Endothall	0.1	1,000	100 ppb	100
Endrin	0.002	1,000	2 ppb	2
Epichlorohydrin	TT	TT (ppm)	0
Ethylene dibromide	0.00005	1,000,000	50 ppt	0
Glyphosate	0.7	1,000	700 ppb	700
Heptachlor	0.0004	1,000,000	400 ppt	0
Heptachlor epoxide	0.0002	1,000,000	200 ppt	0
Hexachlorobenzene	0.001	1,000	1 ppb	0
Hexachlorocyclopenta-diene	0.05	1,000	50 ppb	50
Lindane	0.0002	1,000,000	200 ppt	200
Methoxychlor	0.04	1,000	40 ppb	40
Oxamyl [Vydate]	0.2	1,000	200 ppb	200
PCBs [Polychlorinated biphenyls]	0.0005	1,000,000	500 ppt	0
Pentachlorophenol	0.001	1,000	1 ppb	0
Picloram	0.5	1,000	500 ppb	500
Simazine	0.004	1,000	4 ppb	4
Toxaphene	0.003	1,000	3 ppb	0
Volatile Organic Contaminants
Benzene	0.005	1,000	5 ppb	0
Carbon tetrachloride	0.005	1,000	5 ppb	0
Chloramines	MRDL = 4	....	MRDL = 4 ppm	MRDLG = 4
Chlorine	MRDL = 4	....	MRDL = 4 ppm	MRDLG = 4
Chlorite	1	.....	1 ppm	0.8
Chlorine dioxide	MRDL = 0.8	1,000	MRDL = 800 ppb	MRDLG = 800
Chlorobenzene	0.1	1,000	100 ppb	100
o-Dichlorobenzene	0.6	1,000	600 ppb	600
p-Dichlorobenzene	0.075	1,000	75 ppb	75
1,2-Dichloroethane	0.005	1,000	5 ppb	0
1,1-Dichloroethylene	0.007	1,000	7 ppb	7
cis-1,2-Dichloroethylene	0.07	1,000	70 ppb	70
trans-1,2-Dichloroethylene	0.1	1,000	100 ppb	100
Dichloromethane	0.005	1,000	5 ppb	0
1,2-Dichloropropane	0.005	1,000	5 ppb	0
Ethylbenzene	0.7	1,000	700 ppb	700
Haloacetic Acids (HAA)	0.060	1,000	60 ppb	n/a
MtBE	0.013	1,000	13 ppb	13
Styrene	0.1	1,000	100 ppb	100
Tetrachloroethylene	0.005	1,000	5 ppb	0
1,2,4-Trichlorobenzene	0.07	1,000	70 ppb	70
1,1,1-Trichloroethane	0.2	1,000	200 ppb	200
1,1,2-Trichloroethane	0.005	1,000	5 ppb	3
Trichloroethylene	0.005	1,000	5 ppb	0
TTHMs [Total trihalomethanes]	0.10/0.080	1,000	100/80 ppb	n/a
Toluene	1	1 ppm	1
Vinyl Chloride	0.002	1,000	2 ppb	0
Xylenes, Total	10	10 ppm	10
Per- and Polyfluoroalkyl Substances (PFAS) Contaminants
Perfluorohexane sulfonic acid (PFHxS)	0.000018	1,000,000	18 ppt	0
Perfluorononanoic acid (PFNA)	0.000011	1,000,000	11 ppt	0
Perfluorooctane sulfonic acid (PFOS)	0.000015	1,000,000	15 ppt	0
Perfluorooctanoic acid (PFOA)	0.000012	1,000,000	12 ppt	0

(b) The follow abbreviations shall apply to table 811-2:

(1) "AL" means action level;

(2) "MRDL" means maximum residual disinfectant level;

(3) "MFL" means million fibers per liter;

(4) "NTU" means nephelometric turbidity unit;

(5) "ppb" means parts per billion;

(6) "ppm" means parts per million;

(7) "ppq" means parts per quadrillion;

(8) "ppt" means parts per trillion;

(9) "pCi/L" means picocuries per liter; and

(10) "TT" means treatment technique.

N.H. Admin. Code § Env-Dw 811.25

Derived from Volume XXXVIII Number 50, Filed December 13, 2018, Proposed by 12675, Effective 1/1/2019, Expires 1/1/2029.

Amended by Volume XXXIX Number 32, Filed August 8, 2019, Proposed by #12838, Effective 9/30/2019, Expires 9/30/2029.