Chesterfield, IL Radon Levels

Q: What EPA Radon Zone is Chesterfield in?

Chesterfield is in Macoupin County, EPA Zone 2.

Q: How much does radon mitigation cost in Chesterfield?

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

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

Chesterfield, IL Radon Facts

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

County Macoupin County, IL

Zip Code 62630

Chesterfield in Macoupin County sits within the St. Louis metropolitan area and EPA Zone 2, indicating moderate radon potential. This small Illinois community in zip code 62630 currently lacks specific radon testing data, making professional assessment crucial for homeowners. The area's prairie soils over limestone bedrock, typical of central Illinois geology, can create variable radon conditions that require individual property evaluation.

8.50

pCi/L area average

Above EPA Action Level

Macoupin County average: 8.50 pCi/L, based on 2 user-submitted tests across 2 cities in the county. No homeowner readings have been submitted for Chesterfield 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+

Chesterfield, 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 Chesterfield, IL

No homeowner tests have been submitted for Chesterfield 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
Carlinville	11.5 mi	9.00 pCi/L	1
Jerseyville	16.7 mi	3.50 pCi/L	2
White Hall	20.8 mi	6.00 pCi/L	1
Godfrey	22.8 mi	6.00 pCi/L	1
Staunton	23.2 mi	8.00 pCi/L	1
Grafton	26.1 mi	14.00 pCi/L	1
East Alton	26.3 mi	4.00 pCi/L	1
Auburn	29.0 mi	6.00 pCi/L	1

Macoupin County Radon Profile

EPA mapping assigns Macoupin 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 Macoupin County average 8.50 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 Macoupin County home regardless of zone or a neighbor's results.

Radon FAQ for Chesterfield, IL

What EPA Radon Zone is Chesterfield in?

Chesterfield and the 62630 zip code are in Macoupin 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 Chesterfield?

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

Radon mitigation in Chesterfield 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 Chesterfield?

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.