Is Caledonia County, VT a radon risk area?

Caledonia County is mapped as Zone 2 - Moderate Potential by EPA — meaning the county-wide average indoor level is predicted between 2 and 4 pCi/L. Nationally, Caledonia County ranks higher in radon potential than 51% of rated counties (the 51st percentile).

Where Caledonia County sits nationally

About 30,535 people live in Caledonia County, Vermont, spread over 649.214 square miles. Population density there runs about 47 people per square mile. Rank 480 by population within its EPA zone puts Caledonia County at the 54th percentile among zone peers. Geologically, Caledonia County is grouped into EPA Region 1 alongside 58 other counties that share its rock and soil setting.

What this actually means for a house in Caledonia County

EPA's Zone 2 rating for Caledonia County sits below its own 4 pCi/L action level but above the national indoor average of about 1.3 pCi/L. Middle-of-the-pack doesn't mean risk-free for any one Caledonia County address — a moderate county average still leaves individual homes to test either side of it.

Testing and mitigation in Caledonia County

Nothing about Caledonia 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 Vermont's state radon program

Caledonia County's test kit answers today; a Airthings radon monitor keeps answering for Caledonia 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 Caledonia County's numbers. The guide to what a radon zone actually means covers why testing matters in every zone, not just Zone 1.