Rantoul, IL Radon Levels

Q: What EPA Radon Zone is Rantoul in?

Rantoul is in Champaign County, EPA Zone 1.

Q: How much does radon mitigation cost in Rantoul?

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

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

Rantoul, IL Radon Facts

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

County Champaign County, IL

Zip Code 61866

Situated in Champaign County within the central Illinois prairie region, Rantoul lies in zip code 61866 where deep glacial moraine deposits over limestone bedrock contribute to moderate-to-high radon potential. While comprehensive testing data is still being collected for this Champaign Metro community, homeowners should test their properties given the geological conditions favorable for radon accumulation.

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 Rantoul 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+

Rantoul, 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 Rantoul, IL

No homeowner tests have been submitted for Rantoul 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
Gifford	6.1 mi	10.00 pCi/L	1
Paxton	10.4 mi	4.00 pCi/L	1
Champaign	14.9 mi	6.67 pCi/L	3
Mahomet	15.2 mi	5.00 pCi/L	1
Urbana	15.3 mi	15.00 pCi/L	1
Homer	21.4 mi	20.00 pCi/L	1
Danville	28.6 mi	5.33 pCi/L	3
Monticello	29.7 mi	4.50 pCi/L	2

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 Rantoul, IL

What EPA Radon Zone is Rantoul in?

Rantoul and the 61866 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 Rantoul?

No homeowner radon tests have been submitted for Rantoul 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 Rantoul 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 Rantoul?

Radon mitigation in Rantoul 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 Rantoul?

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.