Versailles, IL Radon Levels

Q: What EPA Radon Zone is Versailles in?

Versailles is in Brown County, EPA Zone 1.

Q: How much does radon mitigation cost in Versailles?

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

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

Versailles, IL Radon Facts

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

County Brown County, IL

Zip Code 62378

Versailles in Brown County sits along the Illinois River valley region, where alluvial soils and underlying limestone create variable radon conditions. Testing data for the 62378 zip code remains limited, making individual home radon testing important for residents in this rural western Illinois community.

6.89

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.89 pCi/L, based on 9 tests from 7 nearby cities. No readings have been submitted for Versailles yet, so the closest recorded data is shown as a benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Versailles, 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 Versailles, IL

No homeowner tests have been submitted for Versailles 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
Griggsville	12.7 mi	4.00 pCi/L	1
Pittsfield	21.1 mi	5.00 pCi/L	1
Jacksonville	25.9 mi	9.00 pCi/L	2
White Hall	34.9 mi	6.00 pCi/L	1
Quincy	35.5 mi	7.50 pCi/L	2
Lincolns New Salem	48.0 mi	8.00 pCi/L	1
Cuba	49.6 mi	6.00 pCi/L	1

Brown County Radon Profile

Because of its underlying geology, Brown County is mapped as EPA Radon Zone 1 — the most elevated classification — where predicted indoor screening averages exceed 4 pCi/L. Direct test data for Brown County remains limited, so the closest neighboring readings are used here to represent the radon conditions homeowners are likely to encounter. As the second leading cause of lung cancer in the U.S., radon warrants testing in every Brown County home regardless of zone or a neighbor's results.

Radon FAQ for Versailles, IL

What EPA Radon Zone is Versailles in?

Versailles and the 62378 zip code are in Brown 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 Versailles?

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

Radon mitigation in Versailles 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 Versailles?

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.