Is Owen County, IN a radon risk area?

EPA's own radon map rates Owen County zone 2 - moderate potential, predicting a county-wide average indoor level between 2 and 4 pCi/L. Rank it against the rest of the country and Owen County lands in the 47th percentile for radon potential.

Owen County by the numbers

About 21,851 people live in Owen County, Indiana, spread over 385.295 square miles. Averaged across its land area, Owen County runs about 57 people per square mile. Rank 596 by population within its EPA zone puts Owen County at the 42nd percentile among zone peers. EPA's geology-based Region 5 groups Owen County with 523 other counties nationally sharing its underlying rock and soil profile.

Why the zone isn't the answer by itself

Owen 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 Owen County address — a moderate county average still leaves individual homes to test either side of it.

Next steps for a home in Owen County

Nothing about Owen 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 Indiana's state radon program

Owen County's test kit answers today; a Airthings radon monitor keeps answering for Owen County over time. Affiliate link, RadonZoneCheck earns a commission there, at no extra cost to you. Use code RADONZONE-10OFF at checkout for 10% off.

More on how this number was built

Owen 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.