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

EPA's own radon map rates Nueces County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. That puts Nueces County in the 31st percentile nationally for radon potential — higher than 31% of the counties EPA has rated.

Where Nueces County sits nationally

Nueces County, Texas is home to about 353,125 people across 839.374 square miles. That works out to roughly 421 people per square mile. By population, Nueces County is the 75th largest of every county sharing its EPA zone — the 93rd percentile by population within that zone. Geologically, Nueces County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

Nueces County's predicted average sits below the national indoor average of about 1.3 pCi/L, well under EPA's 4 pCi/L action level. Low doesn't mean zero: EPA's own data shows homes in Zone 3 counties like Nueces County testing above the action level often enough that skipping a test isn't the safe assumption.

If Nueces County tests above the action level

For a Nueces 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 Nueces County, an ongoing number beats a one-time test - a Airthings radon monitor tracks Nueces 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 Nueces 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. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.