Carthage, IL Radon Levels

Q: What EPA Radon Zone is Carthage in?

Carthage is in Hancock County, EPA Zone 1.

Q: How much does radon mitigation cost in Carthage?

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

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

Carthage, IL Radon Facts

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

County Hancock County, IL

Zip Code 62321

Western Illinois community Carthage in Hancock County sits along the Mississippi River valley where alluvial deposits over limestone bedrock create variable radon conditions. While testing data for zip code 62321 is limited, the area's EPA Zone 1 status indicates significant potential for elevated radon levels. Local homeowners should prioritize testing, especially given the region's typical housing stock with full basements that can trap radon gas.

9.00

pCi/L area average

Above EPA Action Level

Hancock County average: 9.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Carthage 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+

Carthage, 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 Carthage, IL

No homeowner tests have been submitted for Carthage 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
Dallas City	11.1 mi	9.00 pCi/L	1
Stronghurst	25.2 mi	13.00 pCi/L	2
Quincy	34.7 mi	7.50 pCi/L	2
Monmouth	41.9 mi	8.00 pCi/L	1
Cuba	48.7 mi	6.00 pCi/L	1

Hancock County Radon Profile

Hancock 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 1 city in Hancock County average 9.00 pCi/L across 1 test — 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 Hancock County to test, as levels can differ between neighboring homes.

Radon FAQ for Carthage, IL

What EPA Radon Zone is Carthage in?

Carthage and the 62321 zip code are in Hancock 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 Carthage?

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

Radon mitigation in Carthage 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 Carthage?

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.