Sherman, IL Radon Levels

Q: What EPA Radon Zone is Sherman in?

Sherman is in Sangamon County, EPA Zone 1.

Q: How much does radon mitigation cost in Sherman?

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

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

Sherman, IL Radon Facts

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

County Sangamon County, IL

Zip Code 62684

Sherman sits in Sangamon County within central Illinois, where deep glacial moraine deposits over limestone bedrock create favorable conditions for radon production. The Springfield Metro community features a mix of mid-century ranch homes and newer construction, most with full basements that can trap radon gas. Although testing data for zip code 62684 is currently limited, the area's EPA Zone 1 status and geological characteristics warrant professional radon testing for all residents.

5.00

pCi/L area average

Above EPA Action Level

Sangamon County average: 5.00 pCi/L, based on 6 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Sherman 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+

Sherman, 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 Sherman, IL

No homeowner tests have been submitted for Sherman 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
Williamsville	3.6 mi	1.00 pCi/L	1
Springfield	9.0 mi	6.50 pCi/L	2
Lincolns New Salem	13.4 mi	8.00 pCi/L	1
Chatham	17.7 mi	3.00 pCi/L	1
Auburn	23.6 mi	6.00 pCi/L	1
Divernon	24.0 mi	7.00 pCi/L	1
Taylorville	29.5 mi	2.00 pCi/L	1
Moweaqua	36.1 mi	7.00 pCi/L	1

Sangamon County Radon Profile

Sangamon 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 5 cities in Sangamon County average 5.00 pCi/L across 6 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 Sangamon County to test, as levels can differ between neighboring homes.

Radon FAQ for Sherman, IL

What EPA Radon Zone is Sherman in?

Sherman and the 62684 zip code are in Sangamon 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 Sherman?

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

Radon mitigation in Sherman 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 Sherman?

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.