Is Washington County, GA a radon risk area?

Washington County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Washington County ranks higher in radon potential than 13% of rated counties (the 13th percentile).

Where Washington County sits nationally

About 19,834 people live in Washington County, Georgia, spread over 678.526 square miles. Averaged across its land area, Washington County runs about 29 people per square mile. Rank 624 by population within its EPA zone puts Washington County at the 40th percentile among zone peers. EPA's geology-based Region 4 groups Washington County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Washington County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. A Zone 3 label describes Washington County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Testing and mitigation in Washington County

Nothing about Washington County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Georgia's state radon program

Washington County's test kit answers today; a Airthings radon monitor keeps answering for Washington County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

More on how this number was built

Washington County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Washington County carries, the zone explainer covers what it does and doesn't tell you about any one house.