What EPA's radon map says about Medina County

EPA's own radon map rates Medina County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Rank it against the rest of the country and Medina County lands in the 23rd percentile for radon potential.

Medina County by the numbers

About 55,619 people live in Medina County, Texas, spread over 1,325.366 square miles. Averaged across its land area, Medina County runs about 42 people per square mile. Among counties sharing Medina County's EPA zone, it outranks 69% of them by population. Geologically, Medina 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, Medina County's Zone 3 prediction is the low end of the scale. A Zone 3 label describes Medina County's average, not any one basement or slab in it — testing is still the only way an individual homeowner actually finds out.

Next steps for a home in Medina County

Mitigation cost doesn't depend on Medina 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

Medina County's test kit answers today; a Airthings radon monitor keeps answering for Medina 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

Medina County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.