Is Hamilton County, FL a radon risk area?

Hamilton County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Hamilton County lands in the 10th percentile for radon potential.

How Hamilton County compares

About 14,334 people live in Hamilton County, Florida, spread over 514.295 square miles. That works out to roughly 28 people per square mile. Rank 723 by population within its EPA zone puts Hamilton County at the 30th percentile among zone peers. Geologically, Hamilton County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

Hamilton County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 rating means Hamilton County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

If Hamilton County tests above the action level

Nothing about Hamilton 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 Florida's state radon program

Hamilton County's test kit answers today; a Airthings radon monitor keeps answering for Hamilton 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

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