C.M.R. 10, 144, ch. 231, app 144-231-A
Untreated water samples must be analyzed, (prior to the Department's source approval), by a laboratory certified by the State of Maine, for the following contaminants. These contaminants and corresponding maximum contaminant levels and maximum exposure guidelines are regulated by the Department.
1. MICROORGANISMS
CONTAMINANT | MAXIMUM CONTAMINANT LEVEL (MCL)/ ACTION LEVEL (AL) / TREATMENT TECHNIQUE (TT) |
Total Coliform (E. coli required if Total Coliform results are positive) | Absent/Present |
Turbidity | TT: Conventional/Direct Filtration - 1NTU ([GREATOR THAN EQUAL TO] 0.3 NTU or 95% of samples/ month) Other Filtration - 5 NTU |
2. INORGANIC CHEMICALS
CONTAMINANT | MCL / AL / TT |
Antimony | 0.006 milligrams (mg)/liter (L) |
Arsenic | 0.010 mg/L |
Barium | 2 mg/L |
Beryllium | 0.004 mg/L |
Cadmium | 0.005 mg/L |
Chromium (Total) | 0.1 mg/L |
Copper | AL: 1.3 mg/L |
Fluoride | 4.0 mg/L |
Lead | AL: 0.015 mg/L |
Mercury | 0.002 mg/L |
Nitrates (Measured as Nitrogen) | 10 mg/L |
Nitrites (Measured as Nitrogen) | 1 mg/L |
Selenium | 0.05 mg/L |
Thallium | 0.002 mg/L |
3. ORGANIC CHEMICALS
CONTAMINANT | MCL / AL / TREATMENT TECHNIQUE |
Acrylamide | TT: 0.05% dosed at 1 mg/L (or equivalent) |
Alachlor | 0.002 mg/L |
Atrazine | 0.003 mg/L |
Benzene | 0.005 mg/L |
Benzo(a)pyrene (PAH's) | 0.0002 mg/L |
Carbofuran | 0.04 mg/L |
Carbon Tetrachloride | 0.005 mg/L |
Chlordane | 0.002 mg/L |
Chlorobenzene | 0.1 mg/L |
2, 4-D | 0.07 mg/L |
Dalapon | 0.2 mg/L |
1, 2-Dibromo-3- chloropropane (DBCP) | 0.0002 mg/L |
o-Dichlorobenzene | 0.6 mg/L |
p-Dichlorobenzene | 0.075 mg/L |
1,2-Dichloroethane | 0.005 mg/L |
1,1-Dichloroethylene | 0.007 mg/L |
Cis-1,2-Dichloroethylene | 0.07 mg/L |
Trans-1,2-Dichloroethylene | 0.1 mg/L |
Dichloromethane | 0.005 mg/L |
1,2-Dichloropropane | 0.005 mg/L |
Di (2-ethylhexyl) adipate | 0.4 mg/L |
Di (2-ethylhexyl) phthalate | 0.006 mg/L |
Dinoseb | 0.007 mg/L |
Dioxin (2,3,7,8-TCDD) | 0.00000003 mg/L |
Diquat | 0.02 mg/L |
Endothall | 0.1 mg/L |
Endrin | 0.002 mg/L |
Epichlorohydrin | Treatment Technique: 0.01% dosed at 20 mg/L (or equivalent) |
Ethylbenzene | 0.7 mg/L |
Ethylene dibromide | 0.00005 mg/L |
Glyphosate | 0.7 mg/L |
Heptachlor | 0.0004 mg/L |
Heptachlor epoxide | 0.0002 mg/L |
Hexachlorobenzene | 0.001 mg/L |
Hexachlorocyclopentadiene | 0.05 mg/L |
Hexazanone (Velpar) | 200 parts per billion (ppb) |
Lindane | 0.0002 mg/L |
Methoxychlor | 0.04 mg/L |
MTBE | 35 ppb |
Oxamyl (Vydate) | 0.2 mg/L |
Polychlorinated biphenyls (PCBs) | 0.0005 mg/L |
Pentachlorophenol | 0.001 mg/L |
Picloram | 0.5 mg/L |
Simazine | 0.004 mg/L |
Styrene | 0.1 mg/L |
Toluene | 1 mg/L |
Toxaphene | 0.003 mg/L |
2,4,5 - TP (Silvex) | 0.05 mg/L |
1,2,4- Trichlorobenzene | 0.07 mg/L |
1,1,1-Trichloroethane | 0.2 mg/L |
1,1,2-Trichloroethane | 0.005 mg/L |
Trichloroethylene | 0.005 mg/L |
Vinyl chloride | 0.002 mg/L |
Xylenes (total) | 10 mg/L |
4. RADIONUCLIDES
CONTAMINANT | MAXIMUM CONTAMINANT LEVEL ACTION LEVEL / TREATMENT TECHNIQUE |
Gross Alpha | 15 Picocuries/Liter (pCi/L) |
Uranium | 30 ug/L |
Radium (Combined) | 5 pCi/L |
Radon | 4,000 Pci/L |
2. The Department may modify the list of required water quality test parameters prior to approval, if it determines that the testing schedule required will insure that the well can produce safe and potable water, or, otherwise, for the protection of public health.
C.M.R. 10, 144, ch. 231, app 144-231-A