Winslow, IL Radon Levels

Q: What EPA Radon Zone is Winslow in?

Winslow is in Stephenson County, EPA Zone 1.

Q: How much does radon mitigation cost in Winslow?

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

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

Winslow, IL Radon Facts

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

County Stephenson County, IL

Zip Code 61089

Small-town Winslow in Stephenson County sits on glacial deposits over dolomite bedrock characteristic of northwestern Illinois geology. Testing data for this 61089 community is currently limited, making individual home assessment essential for residents. The area's rural setting and typical Midwest housing with full basements make radon testing especially important.

6.60

pCi/L area average

Above EPA Action Level

Stephenson County average: 6.60 pCi/L, based on 5 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Winslow 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+

Winslow, 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 Winslow, IL

No homeowner tests have been submitted for Winslow 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
Orangeville	8.2 mi	14.00 pCi/L	1
Freeport	15.5 mi	3.67 pCi/L	3
Davis	20.6 mi	8.00 pCi/L	1
Pecatonica	26.5 mi	11.00 pCi/L	1
Lanark	27.0 mi	12.00 pCi/L	3
Hanover	29.2 mi	5.00 pCi/L	1
Galena	31.6 mi	1.00 pCi/L	1
Mount Morris	35.6 mi	4.00 pCi/L	1

Stephenson County Radon Profile

Because of its underlying geology, Stephenson 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 Stephenson County average 6.60 pCi/L across 5 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 Stephenson County home regardless of zone or a neighbor's results.

Radon FAQ for Winslow, IL

What EPA Radon Zone is Winslow in?

Winslow and the 61089 zip code are in Stephenson 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 Winslow?

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

Radon mitigation in Winslow 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 Winslow?

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.