Cambridge, IL Radon Levels

Q: What EPA Radon Zone is Cambridge in?

Cambridge is in Henry County, EPA Zone 1.

Q: How much does radon mitigation cost in Cambridge?

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

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

Cambridge, IL Radon Facts

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

County Henry County, IL

Zip Code 61238

Situated in Henry County within the Davenport Metro area, Cambridge lies on Illinois River valley deposits over limestone bedrock typical of western Illinois. The community's housing stock reflects both historic small-town architecture and mid-century construction, with many properties featuring full basements. Testing data for the 61238 zip code area remains sparse, though the geological characteristics suggest residents should prioritize radon testing.

7.00

pCi/L area average

Above EPA Action Level

Henry County average: 7.00 pCi/L, based on 4 user-submitted tests across 4 cities in the county. No homeowner readings have been submitted for Cambridge 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+

Cambridge, 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 Cambridge, IL

No homeowner tests have been submitted for Cambridge 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	10.9 mi	6.00 pCi/L	1
Orion	11.2 mi	4.00 pCi/L	1
Kewanee	14.0 mi	8.00 pCi/L	1
Annawan	15.1 mi	10.00 pCi/L	1
New Windsor	16.5 mi	6.00 pCi/L	1
Coal Valley	17.1 mi	12.00 pCi/L	1
Moline	20.6 mi	5.00 pCi/L	1
Rock Island	23.5 mi	4.50 pCi/L	2

Henry County Radon Profile

Henry 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 4 cities in Henry County average 7.00 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 Henry County to test, as levels can differ between neighboring homes.

Radon FAQ for Cambridge, IL

What EPA Radon Zone is Cambridge in?

Cambridge and the 61238 zip code are in Henry 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 Cambridge?

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

Radon mitigation in Cambridge 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 Cambridge?

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.