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Water: Radon

Radon in Drinking Water

Radon is a naturally-occurring radioactive gas that may  cause cancer, and may be found in drinking water and  indoor air. Some people who are exposed to radon in  drinking water may have increased risk  of getting cancer over the course of their lifetime, especially lung cancer.

Radon in soil  under homes is the biggest source of radon in indoor air,  and presents a greater risk of lung cancer than radon in  drinking water.

As required by the Safe Drinking Water  Act, EPA has developed a proposed regulation to reduce  radon in drinking water that has a multimedia  mitigation option to reduce radon in indoor air.

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