Hillsdale, IL Radon Levels

Q: What EPA Radon Zone is Hillsdale in?

Hillsdale is in Rock Island County, EPA Zone 1.

Q: How much does radon mitigation cost in Hillsdale?

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

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

Hillsdale, IL Radon Facts

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

County Rock Island County, IL

Zip Code 61257

Found in Rock Island County along the Illinois River valley within the Davenport Metro area, Hillsdale sits on alluvial soils over limestone bedrock. Testing data for zip code 61257 remains limited, so residents should conduct individual radon testing to understand their exposure levels in this river valley community.

6.50

pCi/L area average

Above EPA Action Level

Rock Island County average: 6.50 pCi/L, based on 4 user-submitted tests across 3 cities in the county. No homeowner readings have been submitted for Hillsdale 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+

Hillsdale, 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 Hillsdale, IL

No homeowner tests have been submitted for Hillsdale 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
Geneseo	9.0 mi	6.00 pCi/L	1
Moline	15.7 mi	5.00 pCi/L	1
Coal Valley	16.5 mi	12.00 pCi/L	1
Orion	17.9 mi	4.00 pCi/L	1
Fulton	18.3 mi	4.00 pCi/L	1
Rock Island	18.9 mi	4.50 pCi/L	2
Annawan	21.1 mi	10.00 pCi/L	1
Kewanee	28.8 mi	8.00 pCi/L	1

Rock Island County Radon Profile

Rock Island 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 Rock Island County average 6.50 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 Rock Island County to test, as levels can differ between neighboring homes.

Radon FAQ for Hillsdale, IL

What EPA Radon Zone is Hillsdale in?

Hillsdale and the 61257 zip code are in Rock Island 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 Hillsdale?

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

Radon mitigation in Hillsdale 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 Hillsdale?

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.