What EPA's radon map says about Bond County

EPA places Bond 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. Rank it against the rest of the country and Bond County lands in the 44th percentile for radon potential.

How Bond County compares

About 16,576 people live in Bond County, Illinois, spread over 380.336 square miles. Population density there runs about 44 people per square mile. Among counties sharing Bond County's EPA zone, it outranks 34% of them by population. Bond County falls in EPA Radon Region 5, one of 524 counties nationally EPA assigns to that same geologic province.

Why the zone isn't the answer by itself

Neither at the 4 pCi/L action level nor down at the roughly 1.3 pCi/L national indoor norm, Bond County's Zone 2 prediction lands in the gap between the two. Nothing about a Zone 2 label lowers the case for testing in Bond County — EPA recommends it in every zone, moderate included.

Next steps for a home in Bond County

Mitigation cost doesn't depend on Bond 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 Illinois's state radon program

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

The methodology guide shows exactly which EPA and Census sources feed Bond County's numbers. If you're unsure why a low zone still deserves a test, the zone explainer covers that directly.