Virginia, IL Radon Levels

Q: What EPA Radon Zone is Virginia in?

Virginia is in Cass County, EPA Zone 1.

Q: How much does radon mitigation cost in Virginia?

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

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

Virginia, IL Radon Facts

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

County Cass County, IL

Zip Code 62691

Situated in Cass County along the Illinois River valley, Virginia falls within EPA Zone 1 where high radon potential is expected. The combination of glacial deposits over limestone bedrock creates ideal conditions for radon gas migration into residential foundations. With testing data limited for zip code 62691, local homeowners should prioritize radon testing to understand their specific exposure levels.

6.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 6.00 pCi/L, based on 12 tests from 10 nearby cities. No readings have been submitted for Virginia 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+

Virginia, 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 Virginia, IL

No homeowner tests have been submitted for Virginia 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
Jacksonville	15.0 mi	9.00 pCi/L	2
Lincolns New Salem	23.2 mi	8.00 pCi/L	1
Springfield	31.6 mi	6.50 pCi/L	2
Griggsville	32.0 mi	4.00 pCi/L	1
Chatham	32.8 mi	3.00 pCi/L	1
Auburn	35.1 mi	6.00 pCi/L	1
Williamsville	35.1 mi	1.00 pCi/L	1
White Hall	37.5 mi	6.00 pCi/L	1

Cass County Radon Profile

Cass 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. Few homeowner tests have been logged inside Cass County so far, which is why this page draws on the nearest recorded readings to illustrate regional radon levels. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Cass County to test, as levels can differ between neighboring homes.

Radon FAQ for Virginia, IL

What EPA Radon Zone is Virginia in?

Virginia and the 62691 zip code are in Cass 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 Virginia?

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

Radon mitigation in Virginia 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 Virginia?

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.