Caledonia, IL Radon Levels

Q: What EPA Radon Zone is Caledonia in?

Caledonia is in Boone County, EPA Zone 1.

Q: How much does radon mitigation cost in Caledonia?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Caledonia radon levels and find certified testing and mitigation professionals to keep your home safe

Caledonia, IL Radon Facts

EPA Radon Zone Zone 1 — High Risk > 4.0 pCi/L (Zone 1)

County Boone County, IL

Zip Code 61011

Located in northern Boone County near the Wisconsin border, Caledonia sits on glacial till deposits that create high radon potential throughout the region. The area's predominantly single-family homes with full basements provide ideal conditions for radon accumulation from the underlying limestone bedrock. With no current testing data for zip code 61011, homeowners should prioritize radon testing given the geological risk factors.

5.75

pCi/L area average

Above EPA Action Level

Boone County average: 5.75 pCi/L, based on 4 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Caledonia itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Caledonia, IL Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon Readings Near Caledonia, IL

No homeowner tests have been submitted for Caledonia yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Poplar Grove	4.2 mi	7.00 pCi/L	2
Roscoe	4.7 mi	5.50 pCi/L	2
South Beloit	9.0 mi	4.00 pCi/L	1
Belvidere	9.2 mi	4.50 pCi/L	2
Rockton	10.0 mi	6.00 pCi/L	1
Harvard	16.2 mi	8.00 pCi/L	2
Marengo	18.6 mi	5.50 pCi/L	2
Kingston	20.7 mi	13.00 pCi/L	1

Boone County Radon Profile

Because of its underlying geology, Boone County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 2 cities in Boone County average 5.75 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Boone County home regardless of zone or a neighbor's results.

Radon FAQ for Caledonia, IL

What EPA Radon Zone is Caledonia in?

Caledonia and the 61011 zip code are in Boone County, which has an EPA assigned Radon Zone of 1. A zone of 1 predicts an average indoor radon screening level greater than 4 pCi/L.

Why are radon readings shown from areas near Caledonia?

No homeowner radon tests have been submitted for Caledonia yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Boone County average—are the best available indicator of local conditions until Caledonia homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Caledonia?

Radon mitigation in Caledonia typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Caledonia?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.