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

EPA's own radon map rates Wood County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Nationally that's the 22nd percentile for radon potential — Wood County outranks 22% of every county EPA has rated.

Where Wood County sits nationally

Wood County, Texas is home to about 48,742 people across 645.245 square miles. That works out to roughly 76 people per square mile. By population, Wood County is the 351st largest of every county sharing its EPA zone — the 66th percentile by population within that zone. Geologically, Wood County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Why the zone isn't the answer by itself

A Zone 3 county like Wood County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Wood County testing above the action level often enough that skipping a test isn't the safe assumption.

Next steps for a home in Wood County

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

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