Chillicothe, IL Radon Levels

Q: What EPA Radon Zone is Chillicothe in?

Chillicothe is in Peoria County, EPA Zone 1.

Q: How much does radon mitigation cost in Chillicothe?

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

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

Chillicothe, IL Radon Facts

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

County Peoria County, IL

Zip Code 61523

Situated along the Illinois River in Peoria County, Chillicothe benefits from its location within the Peoria Metro area while sitting on river valley alluvial soils over limestone bedrock. The community's housing reflects both historic river town architecture and suburban development, many homes featuring full basements typical of Illinois construction. Testing data for zip code 61523 is currently limited, though the underlying geology suggests residents should pursue individual radon testing given the variable conditions in river valley settings.

6.67

pCi/L area average

Above EPA Action Level

Peoria County average: 6.67 pCi/L, based on 3 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Chillicothe 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+

Chillicothe, 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 Chillicothe, IL

No homeowner tests have been submitted for Chillicothe 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
Dunlap	8.0 mi	7.00 pCi/L	1
Metamora	9.0 mi	7.50 pCi/L	2
Peoria	14.7 mi	5.00 pCi/L	1
East Peoria	15.9 mi	8.00 pCi/L	3
Varna	16.3 mi	20.00 pCi/L	1
Mapleton	22.9 mi	8.00 pCi/L	1
Mackinaw	26.4 mi	20.00 pCi/L	1
Kewanee	32.1 mi	8.00 pCi/L	1

Peoria County Radon Profile

Because of its underlying geology, Peoria 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 3 cities in Peoria County average 6.67 pCi/L across 3 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 Peoria County home regardless of zone or a neighbor's results.

Radon FAQ for Chillicothe, IL

What EPA Radon Zone is Chillicothe in?

Chillicothe and the 61523 zip code are in Peoria 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 Chillicothe?

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

Radon mitigation in Chillicothe 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 Chillicothe?

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.