Avon, IL Radon Levels

Q: What EPA Radon Zone is Avon in?

Avon is in Warren County, EPA Zone 1.

Q: Why are radon readings shown from areas near Avon?

No homeowner radon tests have been submitted for Avon yet, so readings from the closest cities and the Warren County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Avon?

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

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

Avon, IL Radon Facts

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

County Warren County, IL

Zip Code 61415

Small Warren County community Avon sits in western Illinois, classified as EPA Zone 1 where higher radon concentrations are possible. The area lies within the Illinois River valley region where alluvial soils over limestone bedrock can create variable radon conditions. Testing data for zip code 61415 is currently limited, making individual home testing the most reliable way to assess radon exposure levels.

8.00

pCi/L area average

Above EPA Action Level

Warren County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Avon 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+

Avon, 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 Avon, IL

No homeowner tests have been submitted for Avon 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
Cuba	17.6 mi	6.00 pCi/L	1
Knoxville	19.5 mi	8.00 pCi/L	1
Monmouth	20.5 mi	8.00 pCi/L	1
Stronghurst	26.0 mi	13.00 pCi/L	2
Dallas City	36.1 mi	9.00 pCi/L	1
New Windsor	37.6 mi	6.00 pCi/L	1
Mapleton	38.3 mi	8.00 pCi/L	1
Peoria	43.3 mi	5.00 pCi/L	1

Warren County Radon Profile

Warren 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 1 city in Warren County average 8.00 pCi/L across 1 test — 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 Warren County to test, as levels can differ between neighboring homes.

Radon FAQ for Avon, IL

What EPA Radon Zone is Avon in?

Avon and the 61415 zip code are in Warren 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 Avon?

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

Radon mitigation in Avon 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 Avon?

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.