Freestone County, TX: EPA's radon zone, explained

Freestone County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally, Freestone County ranks higher in radon potential than 14% of rated counties (the 14th percentile).

Freestone County by the numbers

Freestone County, Texas is home to about 20,645 people across 877.731 square miles. Averaged across its land area, Freestone County runs about 24 people per square mile. By population, Freestone County is the 601st largest of every county sharing its EPA zone — the 42nd percentile by population within that zone. Freestone County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

What this actually means for a house in Freestone County

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Freestone County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Freestone County — EPA's guidance to test every home makes no exception for counties predicted low.

Testing and mitigation in Freestone County

For a Freestone 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 Texas's state radon program

For Freestone County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Freestone 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 Freestone County's figures come from

Freestone County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Freestone County carries, the zone explainer covers what it does and doesn't tell you about any one house.