Waynesville, IL Radon Levels

Q: What EPA Radon Zone is Waynesville in?

Waynesville is in De Witt County, EPA Zone 1.

Q: How much does radon mitigation cost in Waynesville?

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

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

Waynesville, IL Radon Facts

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

County De Witt County, IL

Zip Code 61778

This central Illinois community in De Witt County sits on deep glacial deposits and prairie soils typical of the region's agricultural landscape. Local housing includes both rural farmsteads and small-town residential properties, many featuring full or partial basements common to Illinois construction practices. Limited testing data exists for Waynesville (61778), making individual home testing important given the glacial geology that can influence radon migration throughout central Illinois.

7.94

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 7.94 pCi/L, based on 18 tests from 10 nearby cities. No readings have been submitted for Waynesville 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+

Waynesville, 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 Waynesville, IL

No homeowner tests have been submitted for Waynesville 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
Bloomington	16.3 mi	11.33 pCi/L	3
Normal	19.7 mi	7.25 pCi/L	4
Le Roy	20.0 mi	5.00 pCi/L	1
Mackinaw	23.8 mi	20.00 pCi/L	1
Williamsville	30.5 mi	1.00 pCi/L	1
Monticello	32.5 mi	4.50 pCi/L	2
East Peoria	37.5 mi	8.00 pCi/L	3
Mahomet	38.2 mi	5.00 pCi/L	1

De Witt County Radon Profile

Because of its underlying geology, De Witt 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 De Witt 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 De Witt County home regardless of zone or a neighbor's results.

Radon FAQ for Waynesville, IL

What EPA Radon Zone is Waynesville in?

Waynesville and the 61778 zip code are in De Witt 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 Waynesville?

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

Radon mitigation in Waynesville 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 Waynesville?

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.