Galesburg, IL Radon Levels

Q: What EPA Radon Zone is Galesburg in?

Galesburg is in Knox County, EPA Zone 1.

Q: How much does radon mitigation cost in Galesburg?

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

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

Galesburg, IL Radon Facts

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

County Knox County, IL

Zip Code 61401

Knox County's county seat, Galesburg sits on deep glacial deposits over Pennsylvanian limestone bedrock that characterizes west-central Illinois geology. Testing data for the 61401 area remains limited, though homeowners should be aware of the region's EPA Zone 1 high radon potential. The city's historic housing stock, including many late-1800s and early-1900s homes with full basements, may be particularly susceptible to radon accumulation.

8.00

pCi/L area average

Above EPA Action Level

Knox County average: 8.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Galesburg 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+

Galesburg, 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 Galesburg, IL

No homeowner tests have been submitted for Galesburg 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
Knoxville	5.2 mi	8.00 pCi/L	1
Monmouth	14.6 mi	8.00 pCi/L	1
New Windsor	17.7 mi	6.00 pCi/L	1
Orion	28.4 mi	4.00 pCi/L	1
Kewanee	30.5 mi	8.00 pCi/L	1
Stronghurst	32.2 mi	13.00 pCi/L	2
Cuba	32.8 mi	6.00 pCi/L	1
Coal Valley	33.7 mi	12.00 pCi/L	1

Knox County Radon Profile

The bedrock and soils beneath Knox County are classified by the EPA as Radon Zone 1, the highest-risk tier, with predicted average indoor screening levels above 4 pCi/L. Homeowner-submitted tests from 1 city in Knox County average 8.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Knox County.

Radon FAQ for Galesburg, IL

What EPA Radon Zone is Galesburg in?

Galesburg and the 61401 zip code are in Knox 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 Galesburg?

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

Radon mitigation in Galesburg 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 Galesburg?

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.