| Stable Metallic Contaminants Measurements in Micrograms per Liter (µg/L) | ||
| Contaminant | Amount | MCL |
| Aluminum (Al) | 1,000 | |
| Antimony (Sb) | 6 | |
| Arsenic (As) | 50 | |
| Barium (Ba) | 1,000 | |
| Berllium (Be) | 4 | |
| Cadmium (Cd) | 5 | |
| Chromium (Cr) | 100 | |
| Copper (Cu) | 1,300 | |
| Iron (Fe) | 300 | |
| Lead (Pb) | 15 | |
| Manganese (Mn) | 50 | |
| Mercury (Hg) | 2 | |
| Nickel (Ni) | 730* | |
| Selenium (Se) | 50 | |
| Silver (Ag) | 100 | |
| Thallium (Th) | 2 | |
| Vanadium (V) | 260* | |
| Zinc (Zn) | 5,000 | |
| Radioactive Metallic Contaminants Measurements in Pico-curies per Liter (pCi/L) | ||
| Contaminant | Amount | MCL |
| Alpha Particles | 15 | |
| Beta Particles | 50 | |
| Lead210 | 0.047* | |
| Radium226 | 5 | |
| Radium228 | 5 | |
| Thorium228 | 0.21* | |
| Thorium230 | 1.3* | |
| Thorium232 | 1.5* | |
| Uranium234 | 20 | |
| Uranium235 | 20 | |
| Uranium238 | 20 | |