Carbon Cliff, IL Radon Levels

Q: What EPA Radon Zone is Carbon Cliff in?

Carbon Cliff is in Rock Island County, EPA Zone 1.

Q: How much does radon mitigation cost in Carbon Cliff?

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

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

Carbon Cliff, IL Radon Facts

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

County Rock Island County, IL

Zip Code 61239

Situated along the Mississippi River in Rock Island County, Carbon Cliff benefits from the Davenport Metro area's mix of mid-century and newer construction. The community's Illinois River valley alluvial soils, combined with underlying Ordovician limestone, create variable radon conditions that can differ significantly from block to block. Limited testing data for zip code 61239 makes individual home testing essential for residents.

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 Carbon Cliff 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+

Carbon Cliff, 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 Carbon Cliff, IL

No homeowner tests have been submitted for Carbon Cliff 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
Moline	5.6 mi	5.00 pCi/L	1
Coal Valley	5.6 mi	12.00 pCi/L	1
Rock Island	9.0 mi	4.50 pCi/L	2
Orion	9.1 mi	4.00 pCi/L	1
Geneseo	11.5 mi	6.00 pCi/L	1
New Windsor	20.8 mi	6.00 pCi/L	1
Annawan	25.6 mi	10.00 pCi/L	1
Fulton	27.6 mi	4.00 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 Carbon Cliff, IL

What EPA Radon Zone is Carbon Cliff in?

Carbon Cliff and the 61239 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 Carbon Cliff?

No homeowner radon tests have been submitted for Carbon Cliff 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 Carbon Cliff 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 Carbon Cliff?

Radon mitigation in Carbon Cliff 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 Carbon Cliff?

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.