Is Hancock County, IN a radon risk area?

Hancock County is mapped as Zone 1 - Highest Potential by EPA — meaning the county-wide average indoor level is predicted above 4 pCi/L. Hancock County sits at the 93rd percentile nationally for radon potential — above 93 of every 100 rated counties.

How Hancock County compares

About 88,810 people live in Hancock County, Indiana, spread over 305.957 square miles. Averaged across its land area, Hancock County runs about 290 people per square mile. Rank 211 by population within its EPA zone puts Hancock County at the 80th percentile among zone peers. Hancock County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Outdoor air nationally averages about 0.4 pCi/L, indoor air about 1.3 pCi/L — Hancock County's Zone 1 prediction clears both of those and EPA's fix-it threshold besides. Being in Zone 1 raises the odds Hancock County homes test above the action level, but it does not mean any specific house does — EPA recommends every home be tested, in every zone, because the only way to know is to test.

Next steps for a home in Hancock County

Nothing about Hancock 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.