Windsor, IL Radon Levels

Q: What EPA Radon Zone is Windsor in?

Windsor is in Shelby County, EPA Zone 2.

Q: How much does radon mitigation cost in Windsor?

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

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

Windsor, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Shelby County, IL

Zip Code 61957

Found in Shelby County in central Illinois, Windsor sits on the glacial till deposits that characterize much of the Prairie State's landscape. Local housing includes both historic farmsteads and more recent residential construction, with many homes featuring the full basements common throughout Illinois. Since radon testing data for ZIP code 61957 is currently limited, homeowners are encouraged to test their properties to understand individual radon exposure potential.

12.00

pCi/L area average

Above EPA Action Level

Shelby County average: 12.00 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Windsor 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+

Windsor, 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 Windsor, IL

No homeowner tests have been submitted for Windsor 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
Mattoon	11.7 mi	9.33 pCi/L	3
Shelbyville	11.9 mi	17.00 pCi/L	1
Effingham	21.4 mi	4.33 pCi/L	3
Charleston	22.2 mi	8.00 pCi/L	1
Moweaqua	26.7 mi	7.00 pCi/L	1
Tuscola	30.2 mi	17.00 pCi/L	1
Taylorville	38.7 mi	2.00 pCi/L	1
Monticello	41.2 mi	4.50 pCi/L	2

Shelby County Radon Profile

EPA mapping assigns Shelby County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 2 cities in Shelby County average 12.00 pCi/L across 2 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 Shelby County home regardless of zone or a neighbor's results.

Radon FAQ for Windsor, IL

What EPA Radon Zone is Windsor in?

Windsor and the 61957 zip code are in Shelby County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Windsor?

No homeowner radon tests have been submitted for Windsor yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Shelby County average—are the best available indicator of local conditions until Windsor 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 Windsor?

Radon mitigation in Windsor 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 Windsor?

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.