Is Indian River County, FL a radon risk area?

EPA places Indian River 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. Indian River County sits at the 28th percentile nationally for radon potential — above 28 of every 100 rated counties.

Indian River County by the numbers

About 172,139 people live in Indian River County, Florida, spread over 502.555 square miles. Averaged across its land area, Indian River County runs about 343 people per square mile. Rank 152 by population within its EPA zone puts Indian River County at the 85th percentile among zone peers. Geologically, Indian River County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

Zone vs. an actual test

Indian River 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 Indian River 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 Indian River County

Nothing about Indian River 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

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

More on how this number was built

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.