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

EPA's own radon map rates Alachua County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Nationally, Alachua County ranks higher in radon potential than 63% of rated counties (the 63rd percentile).

Alachua County by the numbers

Alachua County, Florida is home to about 291,782 people across 875.668 square miles. Population density there runs about 333 people per square mile. By population, Alachua County is the 80th largest of every county sharing its EPA zone — the 92nd percentile by population within that zone. Alachua County falls in EPA Radon Region 4, one of 736 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Alachua County

Alachua County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Alachua County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Alachua County

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

Where Alachua County's figures come from

Alachua 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.