radon zone 1 Pennsylvania

https://thedepcertifiedradonnews.sagecurrent.com/posts/dep-certified-radon-contractor-standards-strengthened-in-new-state-guidelines

Radon zone 1 in Pennsylvania covers much of the state, especially the northern and central counties, where high radon levels in homes are more common due to the underlying geology. It's a significant health concern because radon is a radioactive gas that can cause lung cancer over time. Many local homeowners test their basements and install mitigation systems to reduce exposure, as the risk is highest in areas like this zone.