Illinois City, IL Radon Levels

Q: What EPA Radon Zone is Illinois City in?

Illinois City is in Rock Island County, EPA Zone 1.

Q: How much does radon mitigation cost in Illinois City?

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

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

Illinois City, IL Radon Facts

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

County Rock Island County, IL

Zip Code 61259

Situated along the Mississippi River in Rock Island County, Illinois City sits on river valley alluvial soils combined with underlying Ordovician limestone that creates variable radon conditions. Testing data for zip code 61259 remains limited, making professional assessment crucial for homeowners. The area's proximity to limestone bluffs and variable soil conditions can produce significantly different radon levels from one property to another.

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 Illinois City 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+

Illinois City, IL Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Illinois City?

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Radon Readings Near Illinois City, IL

No homeowner tests have been submitted for Illinois City 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 Island	18.4 mi	4.50 pCi/L	2
Moline	21.6 mi	5.00 pCi/L	1
Coal Valley	22.4 mi	12.00 pCi/L	1
New Windsor	26.0 mi	6.00 pCi/L	1
Orion	26.4 mi	4.00 pCi/L	1
Monmouth	35.5 mi	8.00 pCi/L	1
Geneseo	37.8 mi	6.00 pCi/L	1
Stronghurst	44.0 mi	13.00 pCi/L	2

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 Illinois City, IL

What EPA Radon Zone is Illinois City in?

Illinois City and the 61259 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 Illinois City?

No homeowner radon tests have been submitted for Illinois City 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 Illinois City 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 Illinois City?

Radon mitigation in Illinois City 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 Illinois City?

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.