What EPA's radon map says about Chautauqua County

EPA places Chautauqua 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 that's the 35th percentile for radon potential — Chautauqua County outranks 35% of every county EPA has rated.

Chautauqua County by the numbers

About 3,339 people live in Chautauqua County, Kansas, spread over 638.881 square miles. Averaged across its land area, Chautauqua County runs about 5 people per square mile. Among counties sharing Chautauqua County's EPA zone, it outranks 5% of them by population. Chautauqua County falls in EPA Radon Region 7, one of 412 counties nationally EPA assigns to that same geologic province.

Zone vs. an actual test

Chautauqua County's Zone 2 prediction clears the 1.3 pCi/L national indoor average without reaching EPA's own 4 pCi/L point for recommending a fix. A Zone 2 rating is a moderate county-wide average, not a guarantee about any one house in Chautauqua County — testing is the only way to know an individual home's actual level.

Next steps for a home in Chautauqua County

Mitigation cost doesn't depend on Chautauqua 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 Kansas's state radon program

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

Chautauqua County's zone, rank and region all trace back to named EPA and Census sources — the methodology guide lists exactly which ones. Whatever zone Chautauqua County carries, the zone explainer covers what it does and doesn't tell you about any one house.