Is Schuyler County, IL a radon risk area?

EPA's own radon map rates Schuyler County zone 1 - highest potential, predicting a county-wide average indoor level above 4 pCi/L. Rank it against the rest of the country and Schuyler County lands in the 73rd percentile for radon potential.

How Schuyler County compares

About 6,750 people live in Schuyler County, Illinois, spread over 437.3 square miles. Averaged across its land area, Schuyler County runs about 15 people per square mile. Rank 854 by population within its EPA zone puts Schuyler County at the 20th percentile among zone peers. EPA's geology-based Region 5 groups Schuyler County with 523 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Schuyler County carries a Zone 1 label because its predicted average clears 4 pCi/L outright — three-plus times the 0.4 pCi/L typical outdoors and above the 1.3 pCi/L most homes see. Some Schuyler County homes will test comfortably under the action level despite the county's Zone 1 rating — the only way to know which kind of home you have is an actual test.

Testing and mitigation in Schuyler County

Nothing about Schuyler 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 Illinois's state radon program

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

Schuyler 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.