What EPA's radon map says about Wise County

EPA's own radon map rates Wise County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Wise County lands in the 25th percentile for radon potential.

Where Wise County sits nationally

About 81,275 people live in Wise County, Texas, spread over 904.454 square miles. Averaged across its land area, Wise County runs about 90 people per square mile. Among counties sharing Wise County's EPA zone, it outranks 76% of them by population. Geologically, Wise County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

Wise County's Zone 3 prediction undercuts the roughly 1.3 pCi/L most US homes average, nowhere near EPA's 4 pCi/L threshold for recommending mitigation. Don't read Zone 3 as a pass for Wise County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Wise County

Mitigation cost doesn't depend on Wise 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 Texas's state radon program

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

More on how this number was built

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