Wilmington, IL Radon Levels

Q: What EPA Radon Zone is Wilmington in?

Wilmington is in Will County, EPA Zone 2.

Q: How much does radon mitigation cost in Wilmington?

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

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

Wilmington, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Will County, IL

Zip Code 60481

Situated in Will County within the southern suburban reaches of the Chicago metro, Wilmington sits on glacial till deposits from the Wisconsin glaciation that create soil conditions highly favorable for radon gas production and migration. While radon testing data for zip code 60481 remains limited, the area's geological characteristics and typical Midwest housing with full basements suggest homeowners should conduct comprehensive testing. This historic river town's mix of 19th-century homes and newer residential development may show varying radon levels depending on construction era and foundation type.

8.00

pCi/L area average

Above EPA Action Level

Will County average: 8.00 pCi/L, based on 30 user-submitted tests across 16 cities in the county. No homeowner readings have been submitted for Wilmington 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+

Wilmington, 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 Wilmington, IL

No homeowner tests have been submitted for Wilmington 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
Manhattan	12.1 mi	8.00 pCi/L	1
Minooka	12.6 mi	11.00 pCi/L	1
Shorewood	14.3 mi	4.00 pCi/L	1
Joliet	14.6 mi	6.67 pCi/L	3
Manteno	16.1 mi	11.67 pCi/L	3
New Lenox	16.7 mi	10.14 pCi/L	7
Bourbonnais	17.0 mi	4.00 pCi/L	1
Crest Hill	17.2 mi	6.00 pCi/L	1

Will County Radon Profile

EPA mapping assigns Will County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Homeowner-submitted tests from 16 cities in Will County average 8.00 pCi/L across 30 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 Will County home regardless of zone or a neighbor's results.

Radon FAQ for Wilmington, IL

What EPA Radon Zone is Wilmington in?

Wilmington and the 60481 zip code are in Will County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Wilmington?

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

Radon mitigation in Wilmington 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 Wilmington?

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.