Seymour, IL Radon Levels

Q: What EPA Radon Zone is Seymour in?

Seymour is in Champaign County, EPA Zone 1.

Q: How much does radon mitigation cost in Seymour?

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

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

Seymour, IL Radon Facts

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

County Champaign County, IL

Zip Code 61875

Seymour in Champaign County lies within the Champaign Metro area in central Illinois' glacial moraine region, where deep glacial deposits over limestone bedrock contribute to moderate-to-high radon potential. The 61875 area features rural and small-town residential properties with various foundation types including full basements and crawl spaces. While comprehensive local radon data is currently unavailable, the area's geological characteristics strongly suggest homeowners should prioritize radon testing.

10.00

pCi/L area average

Above EPA Action Level

Champaign County average: 10.00 pCi/L, based on 7 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Seymour 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+

Seymour, 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 Seymour, IL

No homeowner tests have been submitted for Seymour 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	6.4 mi	5.00 pCi/L	1
Champaign	8.4 mi	6.67 pCi/L	3
Monticello	9.3 mi	4.50 pCi/L	2
Urbana	12.7 mi	15.00 pCi/L	1
Tuscola	22.6 mi	17.00 pCi/L	1
Le Roy	24.2 mi	5.00 pCi/L	1
Gifford	24.8 mi	10.00 pCi/L	1
Homer	25.0 mi	20.00 pCi/L	1

Champaign County Radon Profile

Because of its underlying geology, Champaign County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 5 cities in Champaign County average 10.00 pCi/L across 7 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 Champaign County home regardless of zone or a neighbor's results.

Radon FAQ for Seymour, IL

What EPA Radon Zone is Seymour in?

Seymour and the 61875 zip code are in Champaign 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 Seymour?

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

Radon mitigation in Seymour 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 Seymour?

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.