Maximum Allowable Concentrations of Metals and Other Chemicals in Drinking Water
| Chemical | Maximum Allowable Concentration (mg/L) | Health Risks |
|---|---|---|
| Total chromium (as Cr.) | 2.0 | Cancer, kidney damage |
| Copper (as Cu) | 3.0 | Kidney damage, reproductive problems |
| Zinc (as Zn) | 5.0 | Kidney damage |
| Selenium (as Se) | 0.05 | Hair loss, nausea, vomiting |
| Nickel (as Ni) | 3.0 | Cancer, kidney damage |
| Boron (as B) | 2.0 | Nausea, vomiting, diarrhea |
| Residual sodium carbonate | 5.0 | None known |
| Cyanide (as CN-) | 0.2 | Death |
| Chloride (as Cl-) | 1000 | None known |
| Fluoride (as F-) | 15 | Bone and tooth damage |
| Dissolved Phosphates (as P) | 5.0 | None known |
| Sulphate (as SO4-2) | 1000 | None known |