Regulated Contaminants in Drinking Water
Complete list of contaminants regulated by the Maine Drinking Water Program
Microorganisms
- Total Coliform
- E. coli
- Cryptosporidium
- Giardia lamblia
- Heterotrophic bacteria/ Heterotrophic Plate Count (HPC)
- Legionella
- Viruses
- Turbidity
Inorganic Chemicals (IOC)
- Antimony
- Arsenic
- Asbestos
- Barium
- Beryllium
- Cadmium
- Chromium (Total)
- Copper
- Cyanide
- Fluoride
- Lead
- Mercury
- Nickel (No federal regulation, but may require treatment)
- Nitrates (Measured as Nitrogen)
- Nitrites (Measured as Nitrogen)
- Selenium
- Thallium
Radionuclides (RAD)
- Gross Alpha
- Uranium
- Combined Radium (226 & 228)
- Radon
Disinfectants and Disinfection By-products (DBP)
- Bromate
- Chloramines
- Chlorine
- Chlorine Dioxide
- Chlorite
- Ozone
- Total Organic Carbon (TOC)
- Haloacetic Acids (HAA5)
- Total Trihalomethanes (TTHM)
Volatile Organic Compounds (VOC)
- 1,1,1-Trichloroethane
- 1,1,2-Trichloroethane
- 1,1-Dichloroethylene
- 1,2,4- Trichlorobenzene
- 1,2-Dibromo-3-chloropropane (Statewide waiver)
- 1,2-Dichloroethane
- 1,2-Dichloropropane
- Benzene
- Carbon Tetrachloride
- Chlorobenzene
- Cis-1,2-Dichloroethylene
- Dichloromethane
- Ethylbenzene
- Methyl Tertiary Butyl Ether-MTBE (Maine-regulated)
- o-Dichlorobenzene
- p-Dichlorobenzene
- Styrene
- Tetrachloroethylene
- Toluene
- Trans-1,2-Dichloroethylene
- Trichloroethylene
- Vinyl chloride
- Xylenes (total)
Synthetic Organic Chemicals (SOC)
- 2,4,5 -- TP (Silvex)
- 2, 4-D
- Acrylamide
- Alachlor (Lasso)
- Atrazine
- Benzo(a)pyrene (PAHs) (Waived unless facility uses and/or stores concrete, asphalt, tar, or coal, or has incinerators)
- Carbofuran
- Chlordane
- Dalapon
- Di (2-ethylhexyl) adipate
- Di (2-ethylhexyl) phthalate
- Dinoseb
- Dioxin (2,3,7,8-TCDD) (Statewide waiver)
- Diquat
- Endothall
- Endrin
- Epichlorohydrin
- Ethylene dibromide (Statewide waiver)
- Glyphosate (Statewide waiver)
- Heptachlor
- Heptachlor epoxide
- Hexachlorobenzene
- Hexachlorocyclopentadiene
- Hexazanone/ Velpar (Maine-regulated)
- Lindane (BHC gamma)
- Methoxychlor
- Oxamyl (Vydate)
- Pentachlorophenol (Can be waived unless a woodworking facility is nearby)
- Per- and Polyfluoroalkyl Substances (PFAS)
- Picloram
- Polychlorinated biphenyls (PCBs)
- Simazine
- Toxaphene
Water Quality Parameters (WQP)
- Alkalinity
- Calcium
- Orthophosphate
- pH
- Silica