Franklin Grove, IL Radon Levels

Q: What EPA Radon Zone is Franklin Grove in?

Franklin Grove is in Lee County, EPA Zone 1.

Q: How much does radon mitigation cost in Franklin Grove?

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

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

Franklin Grove, IL Radon Facts

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

County Lee County, IL

Zip Code 61031

Franklin Grove in north-central Illinois's Lee County sits on deep glacial deposits over limestone bedrock, creating geological conditions that can support radon migration. Though testing data for zip code 61031 is limited, the area's rural setting features predominantly single-family homes with full basement foundations. Individual radon testing remains important despite the EPA Zone 1 classification, as northern Illinois geology can produce unexpected elevated levels.

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 Franklin Grove 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+

Franklin Grove, 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 Franklin Grove, IL

No homeowner tests have been submitted for Franklin Grove 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
Ashton	5.6 mi	4.00 pCi/L	1
Dixon	8.9 mi	14.00 pCi/L	2
Amboy	10.7 mi	5.00 pCi/L	1
Rochelle	13.6 mi	13.00 pCi/L	1
Mount Morris	14.4 mi	4.00 pCi/L	1
Byron	18.9 mi	11.50 pCi/L	2
Stillman Valley	19.1 mi	5.00 pCi/L	1
Rock Falls	20.3 mi	6.00 pCi/L	2

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 Franklin Grove, IL

What EPA Radon Zone is Franklin Grove in?

Franklin Grove and the 61031 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 Franklin Grove?

No homeowner radon tests have been submitted for Franklin Grove 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 Franklin Grove 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 Franklin Grove?

Radon mitigation in Franklin Grove 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 Franklin Grove?

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.