PA DEP radon standards 5

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Pennsylvania's DEP radon standards set action levels for radon gas in homes, since the state has some of the highest radon levels in the U.S. Radon is a naturally occurring radioactive gas from uranium decay in soil, and it can seep into basements. The state recommends testing your home and mitigating if levels exceed 4 pCi/L, as long-term exposure raises lung cancer risk. Many older homes in PA lack radon-resistant construction, so awareness is key.