Mansfield, IL Radon Levels

Q: What EPA Radon Zone is Mansfield in?

Mansfield is in Piatt County, EPA Zone 1.

Q: How much does radon mitigation cost in Mansfield?

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

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

Mansfield, IL Radon Facts

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

County Piatt County, IL

Zip Code 61854

Positioned in Piatt County within Illinois's central prairie region, Mansfield sits atop deep glacial moraine deposits over limestone bedrock that contribute to the area's moderate-to-high radon potential. Currently lacking specific radon testing data for zip code 61854, residents should prioritize home testing to understand their exposure levels.

4.50

pCi/L area average

Above EPA Action Level

Piatt County average: 4.50 pCi/L, based on 2 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Mansfield 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+

Mansfield, 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 Mansfield, IL

No homeowner tests have been submitted for Mansfield 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
Mahomet	6.7 mi	5.00 pCi/L	1
Monticello	13.3 mi	4.50 pCi/L	2
Champaign	14.8 mi	6.67 pCi/L	3
Le Roy	15.7 mi	5.00 pCi/L	1
Urbana	19.5 mi	15.00 pCi/L	1
Gifford	26.3 mi	10.00 pCi/L	1
Paxton	27.7 mi	4.00 pCi/L	1
Bloomington	30.6 mi	11.33 pCi/L	3

Piatt County Radon Profile

Piatt 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 Piatt County average 4.50 pCi/L across 2 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 Piatt County to test, as levels can differ between neighboring homes.

Radon FAQ for Mansfield, IL

What EPA Radon Zone is Mansfield in?

Mansfield and the 61854 zip code are in Piatt 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 Mansfield?

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

Radon mitigation in Mansfield 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 Mansfield?

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.