What EPA's radon map says about Gadsden County

Gadsden County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Gadsden County ranks higher in radon potential than 21% of rated counties (the 21st percentile).

Where Gadsden County sits nationally

About 44,151 people live in Gadsden County, Florida, spread over 516.375 square miles. Averaged across its land area, Gadsden County runs about 86 people per square mile. Among counties sharing Gadsden County's EPA zone, it outranks 63% of them by population. EPA's geology-based Region 4 groups Gadsden County with 735 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Gadsden County

A Zone 3 county like Gadsden County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Don't read Zone 3 as a pass for Gadsden County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Gadsden County

Mitigation cost doesn't depend on Gadsden County's zone — it depends on the house's foundation. A typical system runs $800–$2,500 (about $1,200 typical), and testing first is what tells you whether that's needed at all.

Find Florida's state radon program

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

Gadsden County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.