Gridley, IL Radon Levels

Q: What EPA Radon Zone is Gridley in?

Gridley is in McLean County, EPA Zone 1.

Q: How much does radon mitigation cost in Gridley?

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

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

Gridley, IL Radon Facts

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

County McLean County, IL

Zip Code 61744

Located in McLean County within both the Bloomington and Peoria metro areas, Gridley sits on Illinois's deep glacial moraine deposits over limestone bedrock that create moderate-to-high radon potential. Testing data for zip code 61744 is currently limited, making individual home testing important for residents. Given the EPA Zone 1 classification and geological conditions that favor radon migration, homeowners should prioritize testing.

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 Gridley 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+

Gridley, 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 Gridley, IL

No homeowner tests have been submitted for Gridley 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
Pontiac	16.0 mi	10.50 pCi/L	2
Normal	16.9 mi	7.25 pCi/L	4
Fairbury	19.2 mi	4.00 pCi/L	1
Bloomington	20.3 mi	11.33 pCi/L	3
Ancona	20.7 mi	20.00 pCi/L	1
Streator	26.3 mi	7.00 pCi/L	1
Varna	27.6 mi	20.00 pCi/L	1
Mackinaw	28.0 mi	20.00 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 Gridley, IL

What EPA Radon Zone is Gridley in?

Gridley and the 61744 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 Gridley?

No homeowner radon tests have been submitted for Gridley 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 Gridley 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 Gridley?

Radon mitigation in Gridley 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 Gridley?

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.