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

EPA places Gilchrist 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. Gilchrist County sits at the 13th percentile nationally for radon potential — above 13 of every 100 rated counties.

How Gilchrist County compares

Gilchrist County, Florida is home to about 20,233 people across 349.695 square miles. Averaged across its land area, Gilchrist County runs about 58 people per square mile. By population, Gilchrist County is the 612th largest of every county sharing its EPA zone — the 41st percentile by population within that zone. Geologically, Gilchrist County is grouped into EPA Region 4 alongside 735 other counties that share its rock and soil setting.

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, Gilchrist County's Zone 3 prediction is the low end of the scale. Even at Zone 3, Gilchrist County homes are not guaranteed a low reading — zone is a county-wide average, and EPA recommends testing every home regardless of zone.

Next steps for a home in Gilchrist County

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

Where Gilchrist County's figures come from

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