§ 141.55 Maximum contaminant level goals for radionuclides.
Current through Aug 22, 2025 · Read all of Part 141
MCLGs for radionuclides are as indicated in the following table:
| Contaminant | MCLG |
|---|---|
| 1. Combined radium-226 and radium-228 | Zero. |
| 2. Gross alpha particle activity (excluding radon and uranium) | Zero. |
| 3. Beta particle and photon radioactivity | Zero. |
| 4. Uranium | Zero. |
[65 FR 76748, Dec. 7, 2000]