Hardee County, FL: EPA's radon zone, explained

EPA places Hardee 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. Rank it against the rest of the country and Hardee County lands in the 16th percentile for radon potential.

Hardee County by the numbers

Hardee County, Florida is home to about 26,068 people across 637.569 square miles. That works out to roughly 41 people per square mile. By population, Hardee County is the 529th largest of every county sharing its EPA zone — the 49th percentile by population within that zone. Hardee County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Hardee 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 Hardee 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 Hardee County tests above the action level

For a Hardee County homeowner, the order is simple: test first, since a kit costs a small fraction of what mitigation would. Only if the result clears 4 pCi/L does a system — typically $800–$2,500, about $1,200 for a common install — become worth pricing out.

Find Florida's state radon program

For Hardee County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Hardee County's levels over time. RadonZoneCheck earns a commission there, at no extra cost to you. Code RADONZONE-10OFF takes 10% off at checkout.

Where Hardee County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Hardee County's numbers. Whatever zone Hardee County carries, the zone explainer covers what it does and doesn't tell you about any one house.