Is Montgomery County, AL a radon risk area?

EPA places Montgomery County in Zone 2 - Moderate Potential — a predicted county-wide average indoor radon level between 2 and 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Montgomery County ranks higher in radon potential than 63% of rated counties (the 63rd percentile).

Where Montgomery County sits nationally

About 225,894 people live in Montgomery County, Alabama, spread over 785.355 square miles. Population density there runs about 288 people per square mile. Rank 108 by population within its EPA zone puts Montgomery County at the 90th percentile among zone peers. EPA's geology-based Region 4 groups Montgomery County with 735 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Montgomery County's predicted average falls between EPA's 4 pCi/L action level and the national indoor average of about 1.3 pCi/L (outdoor air runs roughly 0.4 pCi/L). Middle-of-the-pack doesn't mean risk-free for any one Montgomery County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Montgomery County

Nothing about Montgomery County's EPA zone changes the mitigation number: $800–$2,500 nationally (around $1,200 typical), set by the house's foundation rather than the county it sits in — and only relevant once a test actually clears 4 pCi/L.

Find Alabama's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Montgomery County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.