Radionuclide
Radon
Contaminant Overview and Health Effects
EPA Maximum Contaminant Level (MCL)
300 pCi/L
Legal limit set by the EPA
Contaminant Code
RADON
Health Effects
Increased risk of cancer
Common Sources
1
Natural decay of uranium in soil 2
Groundwater infiltration âšī¸ About This Data
Information about Radon is based on EPA Safe Drinking Water Act (SDWA) regulations. The Maximum Contaminant Level (MCL) is the highest level of a contaminant that is allowed in drinking water.