Carrollton, IL Radon Levels

Q: What EPA Radon Zone is Carrollton in?

Carrollton is in Greene County, EPA Zone 1.

Q: How much does radon mitigation cost in Carrollton?

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

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

Carrollton, IL Radon Facts

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

County Greene County, IL

Zip Code 62016

Nestled in Greene County along the Illinois River valley, Carrollton sits within EPA Zone 1 territory known for significant radon potential. The community's alluvial soils over underlying limestone create conditions where radon levels can vary dramatically from property to property. With testing data for zip code 62016 currently limited, homeowners should prioritize professional radon testing, especially given the geological risk factors present throughout west-central Illinois.

6.00

pCi/L area average

Above EPA Action Level

Greene County average: 6.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Carrollton 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+

Carrollton, 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 Carrollton, IL

No homeowner tests have been submitted for Carrollton 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
White Hall	8.8 mi	6.00 pCi/L	1
Jerseyville	13.0 mi	3.50 pCi/L	2
Grafton	20.7 mi	14.00 pCi/L	1
Godfrey	26.8 mi	6.00 pCi/L	1
Carlinville	29.1 mi	9.00 pCi/L	1
Pittsfield	29.7 mi	5.00 pCi/L	1
Jacksonville	31.4 mi	9.00 pCi/L	2
Griggsville	32.8 mi	4.00 pCi/L	1

Greene County Radon Profile

Because of its underlying geology, Greene County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Homeowner-submitted tests from 1 city in Greene County average 6.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Greene County home regardless of zone or a neighbor's results.

Radon FAQ for Carrollton, IL

What EPA Radon Zone is Carrollton in?

Carrollton and the 62016 zip code are in Greene 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 Carrollton?

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

Radon mitigation in Carrollton 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 Carrollton?

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.