Bismarck, IL Radon Levels

Q: What EPA Radon Zone is Bismarck in?

Bismarck is in Vermilion County, EPA Zone 1.

Q: How much does radon mitigation cost in Bismarck?

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

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

Bismarck, IL Radon Facts

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

County Vermilion County, IL

Zip Code 61814

Found in Vermilion County within central Illinois's glacial moraine region, Bismarck sits atop deep glacial drift over limestone bedrock that contributes to moderate-to-high radon potential. Although specific testing data for the 61814 zip code remains limited, the area's geological profile suggests homeowners should prioritize radon testing.

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 Bismarck 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+

Bismarck, 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 Bismarck, IL

No homeowner tests have been submitted for Bismarck 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	7.6 mi	5.33 pCi/L	3
Gifford	22.3 mi	10.00 pCi/L	1
Homer	23.9 mi	20.00 pCi/L	1
Paxton	29.1 mi	4.00 pCi/L	1
Urbana	32.3 mi	15.00 pCi/L	1
Champaign	35.8 mi	6.67 pCi/L	3
Mahomet	41.3 mi	5.00 pCi/L	1
Paris	44.6 mi	9.67 pCi/L	3

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 Bismarck, IL

What EPA Radon Zone is Bismarck in?

Bismarck and the 61814 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 Bismarck?

No homeowner radon tests have been submitted for Bismarck 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 Bismarck 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 Bismarck?

Radon mitigation in Bismarck 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 Bismarck?

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.