What EPA's radon map says about Brevard County

Brevard County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Brevard County sits at the 31st percentile nationally for radon potential — above 31 of every 100 rated counties.

Brevard County by the numbers

About 658,447 people live in Brevard County, Florida, spread over 1,014.973 square miles. That works out to roughly 649 people per square mile. Among counties sharing Brevard County's EPA zone, it outranks 96% of them by population. EPA's geology-based Region 4 groups Brevard County with 735 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Brevard County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Brevard 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 Brevard County

Mitigation cost doesn't depend on Brevard 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

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Brevard County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.