Shirley, IL Radon Levels

Q: What EPA Radon Zone is Shirley in?

Shirley is in McLean County, EPA Zone 1.

Q: How much does radon mitigation cost in Shirley?

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

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

Shirley, IL Radon Facts

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

County McLean County, IL

Zip Code 61772

Located in McLean County within the Bloomington Metro area, Shirley sits in Illinois's central prairie region where deep glacial moraine deposits over limestone bedrock contribute to the area's EPA Zone 1 designation. The community features traditional downstate housing with many full-basement homes that can trap radon effectively. Given the absence of local testing data for ZIP code 61772, professional radon testing is strongly recommended for all residents.

8.50

pCi/L area average

Above EPA Action Level

McLean County average: 8.50 pCi/L, based on 8 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Shirley 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+

Shirley, 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 Shirley, IL

No homeowner tests have been submitted for Shirley 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
Bloomington	5.4 mi	11.33 pCi/L	3
Normal	8.2 mi	7.25 pCi/L	4
Mackinaw	16.2 mi	20.00 pCi/L	1
Le Roy	17.7 mi	5.00 pCi/L	1
East Peoria	30.3 mi	8.00 pCi/L	3
Metamora	31.3 mi	7.50 pCi/L	2
Peoria	34.7 mi	5.00 pCi/L	1
Mapleton	36.0 mi	8.00 pCi/L	1

McLean County Radon Profile

McLean County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 3 cities in McLean County average 8.50 pCi/L across 8 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in McLean County to test, as levels can differ between neighboring homes.

Radon FAQ for Shirley, IL

What EPA Radon Zone is Shirley in?

Shirley and the 61772 zip code are in McLean 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 Shirley?

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

Radon mitigation in Shirley 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 Shirley?

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.