Is Hendry County, FL a radon risk area?

EPA places Hendry 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, Hendry County ranks higher in radon potential than 21% of rated counties (the 21st percentile).

Where Hendry County sits nationally

About 46,130 people live in Hendry County, Florida, spread over 1,155.954 square miles. Averaged across its land area, Hendry County runs about 40 people per square mile. Rank 365 by population within its EPA zone puts Hendry County at the 65th percentile among zone peers. Hendry County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Hendry County's Zone 3 prediction is the low end of the scale. Even at Zone 3, Hendry County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

If Hendry County tests above the action level

Nothing about Hendry 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

Hendry County's test kit answers today; a Airthings radon monitor keeps answering for Hendry 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 Hendry County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.