What EPA's radon map says about Goliad County

Goliad 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 4th percentile for radon potential — Goliad County outranks 4% of every county EPA has rated.

Goliad County by the numbers

About 7,221 people live in Goliad County, Texas, spread over 852.011 square miles. Averaged across its land area, Goliad County runs about 8 people per square mile. Among counties sharing Goliad County's EPA zone, it outranks 13% of them by population. Geologically, Goliad County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

Well clear of both the 1.3 pCi/L national indoor average and EPA's 4 pCi/L action level, Goliad County's Zone 3 prediction is the low end of the scale. Don't read Zone 3 as a pass for Goliad County — EPA's guidance to test every home makes no exception for counties predicted low.

Next steps for a home in Goliad County

Mitigation cost doesn't depend on Goliad 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

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

More on how this number was built

Goliad County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.