Is Kenai Peninsula Borough, AK a radon risk area?

EPA's own radon map rates Kenai Peninsula Borough 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 Kenai Peninsula Borough lands in the 56th percentile for radon potential.

Where Kenai Peninsula Borough sits nationally

About 61,259 people live in Kenai Peninsula Borough, Alaska, spread over 16,017.65 square miles. Averaged across its land area, Kenai Peninsula Borough runs about 4 people per square mile. Rank 304 by population within its EPA zone puts Kenai Peninsula Borough at the 71st percentile among zone peers. Geologically, Kenai Peninsula Borough is grouped into EPA Region 10 alongside 141 other counties that share its rock and soil setting.

What this actually means for a house in Kenai Peninsula Borough

Call it a middle case: above the 1.3 pCi/L most US homes average, below the 4 pCi/L line EPA uses to recommend mitigation — that's Kenai Peninsula Borough's Zone 2 prediction. A county-wide moderate average, like Kenai Peninsula Borough's, can still hide a specific house well above or below it — testing is what actually answers the question.

Next steps for a home in Kenai Peninsula Borough

Nothing about Kenai Peninsula Borough'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 Alaska's state radon program

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

More on how this number was built

The methodology guide shows exactly which EPA and Census sources feed Kenai Peninsula Borough's numbers. Whatever zone Kenai Peninsula Borough carries, the zone explainer covers what it does and doesn't tell you about any one house.