Harmon, IL Radon Levels

Q: What EPA Radon Zone is Harmon in?

Harmon is in Lee County, EPA Zone 1.

Q: Why are radon readings shown from areas near Harmon?

No homeowner radon tests have been submitted for Harmon yet, so readings from the closest cities and the Lee County average are used as the best available indicator of local conditions. The EPA recommends testing every individual home.

Q: How much does radon mitigation cost in Harmon?

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

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

Harmon, IL Radon Facts

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

County Lee County, IL

Zip Code 61042

Based in Lee County among northern Illinois's glacial landscape, Harmon sits on glacial till deposits that can contribute to elevated radon potential in some areas. With testing data limited for this 61042 zip code community, homeowners should consider professional radon testing to determine if their specific property requires attention, particularly in homes with full basements common to the region.

9.25

pCi/L area average

Above EPA Action Level

Lee County average: 9.25 pCi/L, based on 4 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Harmon 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+

Harmon, 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 Harmon, IL

No homeowner tests have been submitted for Harmon 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
Rock Falls	7.9 mi	6.00 pCi/L	2
Walnut	11.1 mi	5.00 pCi/L	1
Dixon	11.2 mi	14.00 pCi/L	2
Amboy	11.5 mi	5.00 pCi/L	1
Ashton	21.9 mi	4.00 pCi/L	1
Princeton	24.3 mi	11.50 pCi/L	2
Mount Morris	25.2 mi	4.00 pCi/L	1
Annawan	27.3 mi	10.00 pCi/L	1

Lee County Radon Profile

Lee County falls in EPA Radon Zone 1, meaning the local uranium-bearing geology is predicted to drive average indoor radon screening levels above the EPA's 4 pCi/L action threshold. Homeowner-submitted tests from 3 cities in Lee County average 9.25 pCi/L across 4 tests — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Lee County to test, as levels can differ between neighboring homes.

Radon FAQ for Harmon, IL

What EPA Radon Zone is Harmon in?

Harmon and the 61042 zip code are in Lee 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 Harmon?

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

Radon mitigation in Harmon 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 Harmon?

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.