Collison, IL Radon Levels

Q: What EPA Radon Zone is Collison in?

Collison is in Vermilion County, EPA Zone 1.

Q: How much does radon mitigation cost in Collison?

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

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

Collison, IL Radon Facts

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

County Vermilion County, IL

Zip Code 61831

This small Vermilion County community in the central Illinois prairie region sits atop deep glacial moraine deposits over limestone bedrock that contribute to moderate-to-high radon potential. Testing data for zip code 61831 remains limited, emphasizing the importance of individual home radon measurement. The area's loess and glacial drift soils over Pennsylvanian shale and limestone create conditions where radon levels can vary significantly between neighboring properties.

5.33

pCi/L area average

Above EPA Action Level

Vermilion County average: 5.33 pCi/L, based on 3 user-submitted tests across 1 city in the county. No homeowner readings have been submitted for Collison 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+

Collison, 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 Collison, IL

No homeowner tests have been submitted for Collison 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
Danville	9.4 mi	5.33 pCi/L	3
Gifford	13.5 mi	10.00 pCi/L	1
Homer	15.5 mi	20.00 pCi/L	1
Urbana	22.3 mi	15.00 pCi/L	1
Paxton	22.7 mi	4.00 pCi/L	1
Champaign	25.8 mi	6.67 pCi/L	3
Mahomet	31.4 mi	5.00 pCi/L	1
Tuscola	38.7 mi	17.00 pCi/L	1

Vermilion County Radon Profile

Because of its underlying geology, Vermilion 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 Vermilion County average 5.33 pCi/L across 3 tests — 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 Vermilion County home regardless of zone or a neighbor's results.

Radon FAQ for Collison, IL

What EPA Radon Zone is Collison in?

Collison and the 61831 zip code are in Vermilion 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 Collison?

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

Radon mitigation in Collison 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 Collison?

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.