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

Midland 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 Midland County in the 29th percentile nationally for radon potential — higher than 29% of the counties EPA has rated.

Where Midland County sits nationally

Midland County, Texas is home to about 183,587 people across 900.358 square miles. Averaged across its land area, Midland County runs about 204 people per square mile. By population, Midland County is the 138th largest of every county sharing its EPA zone — the 87th percentile by population within that zone. Geologically, Midland County is grouped into EPA Region 6 alongside 502 other counties that share its rock and soil setting.

Zone vs. an actual test

A Zone 3 county like Midland 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 Midland County testing above the action level often enough that skipping a test isn't the safe assumption.

If Midland County tests above the action level

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

Where Midland County's figures come from

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