Clayton, IL Radon Levels

Q: What EPA Radon Zone is Clayton in?

Clayton is in Adams County, EPA Zone 1.

Q: How much does radon mitigation cost in Clayton?

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

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

Clayton, IL Radon Facts

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

County Adams County, IL

Zip Code 62324

Situated along the Mississippi River in western Illinois's Adams County, Clayton lies in EPA Zone 1 where comprehensive radon testing data is not available. The area's river valley alluvial soils over limestone bedrock can create variable radon conditions, with some homes potentially exceeding expected levels for the zone classification. Residents in zip code 62324 should consider radon testing, particularly in homes with basements where radon gas can accumulate.

7.50

pCi/L area average

Above EPA Action Level

Adams County average: 7.50 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Clayton 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+

Clayton, 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 Clayton, IL

No homeowner tests have been submitted for Clayton 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
Quincy	20.9 mi	7.50 pCi/L	2
Griggsville	24.4 mi	4.00 pCi/L	1
Pittsfield	29.5 mi	5.00 pCi/L	1
Dallas City	39.6 mi	9.00 pCi/L	1
Jacksonville	43.1 mi	9.00 pCi/L	2
White Hall	50.0 mi	6.00 pCi/L	1

Adams County Radon Profile

The bedrock and soils beneath Adams County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 1 city in Adams County average 7.50 pCi/L across 2 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Adams County.

Radon FAQ for Clayton, IL

What EPA Radon Zone is Clayton in?

Clayton and the 62324 zip code are in Adams 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 Clayton?

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

Radon mitigation in Clayton 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 Clayton?

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.