Atascosa County, TX radon potential

Atascosa County is mapped as Zone 3 - Low Potential by EPA — meaning the county-wide average indoor level is predicted below 2 pCi/L. Rank it against the rest of the country and Atascosa County lands in the 22nd percentile for radon potential.

Atascosa County by the numbers

Atascosa County, Texas is home to about 52,783 people across 1,219.542 square miles. Population density there runs about 43 people per square mile. Within its own EPA zone, Atascosa County is bigger by population than 68% of the counties that share it. Geologically, Atascosa County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

What this actually means for a house in Atascosa County

A Zone 3 county like Atascosa County is predicted closer to the 0.4 pCi/L typical outdoors than to EPA's 4 pCi/L action level. A Zone 3 rating means Atascosa 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.

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

Where Atascosa County's figures come from

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Atascosa County carries, the zone explainer covers what it does and doesn't tell you about any one house.