| Maximum Contaminant Levels for Drinking Water | ||
|---|---|---|
| Type | Contaminant | MCL |
| Inorganic Chemicals (IOCs) | Antimony | 0.006 mg/l |
| Arsenic | 0.01 mg/l | |
| Barium | 2 mg/l | |
| Beryllium | 0.004 mg/l | |
| Cadmium | 0.005 mg/l | |
| Chromium | 0.1 mg/l | |
| Cyanide (free) | 0.2 mg/l | |
| Fluoride (Adjusted)* | 2 mg/l | |
| Fluoride (Natural)* | 4 mg/l | |
| Mercury | 0.002 mg/l | |
| Nickel | --- | |
| Selenium | 0.05 mg/l | |
| Thallium | 0.002 mg/l | |
| Nitrate | 10 mg/l | |
| Nitrite | 1 mg/l | |
| Total Nitrate & Nitrite | 10 mg/l | |
| Sodium* | No MCL | |
| Asbestos | Asbestos | 7 MFL** |
| Lead & Copper | Lead Action Level | 0.015 mg/l |
| Copper Action Level | 1.3 mg/l | |
| Radionuclides* | Gross Alpha | 15 PCi/l |
| Gross Alpha Action Level | 5 PCi/l | |
| Radium-226 Action Level | 3 PCi/l | |
| Radium-226 & Radium-228 (combined) | 5 PCi/l | |
| Manmade | *** | |
| Volatile Organic Compounds (VOCs) | 1,1-Dichloroethylene | 7 μg/l |
| 1,1,1-Trichloroethane | 200 μg/l | |
| 1,1,2-Trichloroethane | 5 μg/l | |
| 1,2-Dichloroethane | 5 μg/l | |
| 1,2-Dichloropropane | 5 μg/l | |
| 1,2,4-Trichlorobenzene | 70 μg/l | |
| Benzene | 5 μg/l | |
| Carbon Tetrachloride | 5 μg/l | |
| Cis-1,2-Dichloroethylene | 70 μg/l | |
| Dichloromethane | 5 μg/l | |
| Ethylbenzene | 700 μg/l | |
| Monochlorobenzene | 100 μg/l | |
| o-Dichlorobenzene | 600 μg/l | |
| p-Dichlorobenzene | 75 μg/l | |
| Styrene | 100 μg/l | |
| Tetrachloroethylene | 5 μg/l | |
| Toluene | 1000 μg/l | |
| Trans-1,2-Dichloroethylene | 100 μg/l | |
| Trichloroethylene | 5 μg/l | |
| Vinyl Chloride | 2 μg/l | |
| Xylenes (total) | 104 μg/l | |
| Disinfection Byproducts | Total Trihalomethanes**** | 80 μg/l |
| Haloacetic Acids 5***** | 60 μg/l | |
| Synthetic Organic Compounds (SOCs) | 2,4-D | 70 μg/l |
| 2,4,5-TP (Silvex) | 50 μg/l | |
| Alachlor | 2 μg/l | |
| Atrazine | 3 μg/l | |
| Benzo(a)pyrene | 0.2 μg/l | |
| Carbofuran | 40 μg/l | |
| Chlordane | 2 μg/l | |
| Dalapon | 200 μg/l | |
| Di(2-ethylhexyl)adipate | 400 μg/l | |
| Di(2-ethylhexyl)phthalate | 6 μg/l | |
| Dibromochloropropane (DBCP) | 0.2 μg/l | |
| Dinoseb | 7 μg/l | |
| Dioxin (2,3,7,8-TCDD) | 3x10-5 μg/l | |
| Diquat | 20 μg/l | |
| Endothall | 100 μg/l | |
| Endrin | 2 μg/l | |
| Ethylene Dibromide (EDB) | 0.05 μg/l | |
| Glyphosate | 700 μg/l | |
| Heptachlor | 0.4 μg/l | |
| Heptachlor epoxide | 0.2 μg/l | |
| Hexachlorobenzene | 1 μg/l | |
| Hexachlorocyclopentadiene | 50 μg/l | |
| Lindane | 0.2 μg/l | |
| Methoxychlor | 40 μg/l | |
| Oxamyl (Vydate) | 200 μg/l | |
| PCBs | 0.5 μg/l | |
| Pentachlorophenol | 1 μg/l | |
| Picloram | 500 μg/l | |
| Simazine | 4 μg/l | |
| Toxaphene | 3 μg/l | |
* Community Water Systems Only
** MFL=million fibers/liter > 10 micron
*** The average annual concentration of beta particle and photon radioactivity from manmade radionuclides in drinking water shall not produce an annual dose equivalent to the total body or any internal organ greater than four (4) millirem per year.
**** The sum of the concentrations of bromodichlormethane, dibromochloromethane, tribromomethane (bromoform), and trichloromethane (chloroform).
***** The sum of the concentrations of monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, bromoacetic acid, and dibromoacetic acid.