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Radon
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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