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| Radionuclide | ||||
| Contaminants |
MCLG* |
MCL** |
|
Treatment
Methods |
| Beta particle and photon activity (formerly man-made radionuclides) |
zero |
4
mrem/year |
Ion exchange Reverse Osmosis Distillation Electrodialysis |
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| Gross alpha particle activity | zero |
15
pCi/L |
Treatment method depends on the specific radionuclide (e.g., radium, or uranium, see below). | |
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| Radium 226 & Radium 228 | zero |
5
pCi/L |
Cation
Exchange |
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| Radon | zero(P)* |
300
pCi/L (P)* |
Activated
Carbon |
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| Uranium | zero |
0.02
mg/L (equivalent to 30 pCi/L) |
Coagulation/Filtration |
|
(P)* = Proposed Standard MCLG* = Maximum Contaminant Level Goal established at the level at which no known or anticipated adverse effects on the health of persons occur and which allows an adequate margin of safety; expressed in milligrams per liter unless otherwise specified. MCL** = Maximum Contaminant Level established as close to the MCLG as feasible taking into consideration costs and treatment techniques applicable at public water systems; expressed in milligrams per liter unless otherwise specified. |
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