Is Seminole County, GA a radon risk area?

EPA places Seminole County in Zone 3 - Low Potential — a predicted county-wide average indoor radon level below 2 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally that's the 6th percentile for radon potential — Seminole County outranks 6% of every county EPA has rated.

Where Seminole County sits nationally

About 9,274 people live in Seminole County, Georgia, spread over 237.551 square miles. Population density there runs about 39 people per square mile. Rank 839 by population within its EPA zone puts Seminole County at the 19th percentile among zone peers. Seminole County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Seminole County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Seminole 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 Seminole County

Nothing about Seminole 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

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Seminole County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.