Is Pike County, IL a radon risk area?

EPA places Pike County in Zone 1 - Highest Potential — a predicted county-wide average indoor radon level above 4 pCi/L, based on the geology, soil and aerial radioactivity data behind EPA's national map. Nationally, Pike County ranks higher in radon potential than 78% of rated counties (the 78th percentile).

Pike County by the numbers

About 14,258 people live in Pike County, Illinois, spread over 831.352 square miles. That works out to roughly 17 people per square mile. Rank 680 by population within its EPA zone puts Pike County at the 36th percentile among zone peers. EPA's geology-based Region 5 groups Pike County with 523 other counties nationally sharing its underlying rock and soil profile.

Zone vs. an actual test

Where the national indoor average runs about 1.3 pCi/L, Pike County's Zone 1 rating puts its predicted county average above EPA's 4 pCi/L action level itself. Being in Zone 1 raises the odds Pike 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.

Testing and mitigation in Pike County

Nothing about Pike 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

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

Every figure on this page traces to EPA's own Map of Radon Zones and Census data, documented in the methodology guide. Whatever zone Pike County carries, the zone explainer covers what it does and doesn't tell you about any one house.