Wharton County, TX radon potential

Wharton County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. That puts Wharton County in the 20th percentile nationally for radon potential — higher than 20% of the counties EPA has rated.

Wharton County by the numbers

Wharton County, Texas is home to about 42,035 people across 1,086.144 square miles. Averaged across its land area, Wharton County runs about 39 people per square mile. Within its own EPA zone, Wharton County is bigger by population than 62% of the counties that share it. Wharton 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 Wharton County

Wharton 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. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Wharton County testing above the action level often enough that skipping a test isn't the safe assumption.

If Wharton County tests above the action level

A short-term test kit is the standard first step and typically costs far less than mitigation itself. If a test comes back at or above 4 pCi/L, a radon mitigation system for a typical home runs roughly $800–$2,500 (around $1,200 for a common single-family install), driven mainly by foundation type, not by county.

Find Texas's state radon program

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

Where Wharton County's figures come from

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