Title 40
SECTION 141.51
141.51 Maximum contaminant level goals for inorganic contaminants.
§ 141.51 Maximum contaminant level goals for inorganic contaminants.(a) [Reserved]
(b) MCLGs for the following contaminants are as indicated:
| Contaminant | MCLG (mg/l) |
|---|---|
| Antimony | 0.006 |
| Arsenic | zero 1 |
| Asbestos | 7 Million fibers/liter (longer than 10 µm). |
| Barium | 2 |
| Beryllium | .004 |
| Cadmium | 0.005 |
| Chromium | 0.1 |
| Copper | 1.3 |
| Cyanide (as free Cyanide) | .2 |
| Fluoride | 4.0 |
| Lead | zero |
| Mercury | 0.002 |
| Nitrate | 10 (as Nitrogen). |
| Nitrite | 1 (as Nitrogen). |
| Total Nitrate + Nitrite | 10 (as Nitrogen). |
| Selenium | 0.05 |
| Thallium | .0005 |
1 This value for arsenic is effective January 23, 2006. Until then, there is no MCLG.