| 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 man-made 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 bromodichloromethane, dibromochloromethane, tribromomethane (bromoform), and trichloromethane (chloroform).
***** The sum of the concentrations of monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, bromoacetic acid, and dibromoacetic acid.