What EPA's radon map says about Montague County

EPA's own radon map rates Montague County zone 3 - low potential, predicting a county-wide average indoor level below 2 pCi/L. Montague County sits at the 14th percentile nationally for radon potential — above 14 of every 100 rated counties.

Montague County by the numbers

About 21,890 people live in Montague County, Texas, spread over 930.906 square miles. Population density there runs about 24 people per square mile. Among counties sharing Montague County's EPA zone, it outranks 44% of them by population. Montague County falls in EPA Radon Region 6, one of 503 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Montague 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 Montague County testing above the action level often enough that skipping a test isn't the safe assumption.

Testing and mitigation in Montague County

Mitigation cost doesn't depend on Montague 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

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

Montague 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.