Zone 1 radon area 2

https://yorkcountyradontestingtips.greyhavendaily.com/posts/york-county-radon-testing-push-gains-momentum-as-health-concerns-rise

Living in a Zone 1 radon area means your home is in a high-risk region for this colorless, odorless gas. Testing your basement or lowest living level is a smart first step to see if levels are elevated. If they are, mitigation systems can effectively pull radon from beneath the house and vent it safely outside.