Sullivan, IL Radon Levels

Q: What EPA Radon Zone is Sullivan in?

Sullivan is in Moultrie County, EPA Zone 1.

Q: How much does radon mitigation cost in Sullivan?

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

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

Sullivan, IL Radon Facts

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

County Moultrie County, IL

Zip Code 61951

Sullivan in Moultrie County sits in EPA Zone 1 within central Illinois, where deep glacial moraine deposits over limestone bedrock contribute to moderate-to-high radon potential across the central Illinois prairie. The small town features predominantly older homes with full basements, creating the enclosed below-grade spaces where radon accumulates most readily. Given limited testing data for zip code 61951, homeowners should prioritize radon testing to understand their individual exposure risk.

8.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 8.00 pCi/L, based on 17 tests from 10 nearby cities. No readings have been submitted for Sullivan yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Sullivan, 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 Sullivan, IL

No homeowner tests have been submitted for Sullivan 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
Shelbyville	14.3 mi	17.00 pCi/L	1
Mattoon	14.4 mi	9.33 pCi/L	3
Moweaqua	22.2 mi	7.00 pCi/L	1
Tuscola	22.3 mi	17.00 pCi/L	1
Charleston	23.9 mi	8.00 pCi/L	1
Monticello	30.0 mi	4.50 pCi/L	2
Effingham	32.7 mi	4.33 pCi/L	3
Taylorville	36.9 mi	2.00 pCi/L	1

Moultrie County Radon Profile

Because of its underlying geology, Moultrie County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Direct test data for Moultrie County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Moultrie County home regardless of zone or a neighbor's results.

Radon FAQ for Sullivan, IL

What EPA Radon Zone is Sullivan in?

Sullivan and the 61951 zip code are in Moultrie 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 Sullivan?

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

Radon mitigation in Sullivan 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 Sullivan?

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.