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

Hunt County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Nationally that's the 27th percentile for radon potential — Hunt County outranks 27% of every county EPA has rated.

Hunt County by the numbers

Hunt County, Texas is home to about 118,729 people across 840.424 square miles. Averaged across its land area, Hunt County runs about 141 people per square mile. By population, Hunt County is the 197th largest of every county sharing its EPA zone — the 81st percentile by population within that zone. EPA's geology-based Region 6 groups Hunt County with 502 other counties nationally sharing its underlying rock and soil profile.

What this actually means for a house in Hunt County

Hunt County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. A Zone 3 rating means Hunt County's county-wide average is predicted low, but EPA is explicit that a meaningful share of homes in low-potential zones still test above the action level — a low zone is not a reason to skip testing.

Testing and mitigation in Hunt County

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

Where Hunt County's figures come from

The methodology guide shows exactly which EPA and Census sources feed Hunt County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.