N.H. Admin. Code Env, Env-Dw, ch. Env-Dw 800, app B
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 | For systems that collect 40 or more samples per month, MCL occurs when 5% of monthly samples are positive. For systems that collect fewer than 40 samples per month, MCL occurs when 1 monthly sample is positive | CWS that collect 40 or more samples per month; not more than 5% of monthly samples are allowed to be positive. CWS that collect fewer than 40 samples per month; not more than 1 positive monthly sample. | 0 | |
Turbidity | TT | TT (NTU) | n/a | |
Fecal coliforms or E. coli, or both | 0 | 0 | 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 | |
Abbreviations: AL = Action Level; MRDL = Maximum Residual Disinfectant Level; MFL = Million Fibers per Liter; NTU = Nephelometric Turbidity Unit; ppb = Parts per billion; ppm = parts per million; ppq = parts per quadrillion; ppt = Parts per trillion; pCi/L = picocuries per liter; TT = Treatment Technique
N.H. Admin. Code Env, Env-Dw, ch. Env-Dw 800, app B