Saint Joseph, IL Radon Levels

Q: What EPA Radon Zone is Saint Joseph in?

Saint Joseph is in Champaign County, EPA Zone 1.

Q: How much does radon mitigation cost in Saint Joseph?

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

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

Saint Joseph, IL Radon Facts

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

County Champaign County, IL

Zip Code 61873

Situated in Champaign County within the central Illinois prairie region, Saint Joseph benefits from deep glacial moraine deposits over limestone bedrock that contribute to moderate-to-high radon potential. The area features a mix of historic homes and postwar ranch-style construction, many with full or partial basements. Testing data remains limited for this zip code 61873, making professional radon testing essential for local homeowners.

10.00

pCi/L area average

Above EPA Action Level

Champaign County average: 10.00 pCi/L, based on 7 user-submitted tests across 5 cities in the county. No homeowner readings have been submitted for Saint Joseph 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+

Saint Joseph, IL Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Need Radon Mitigation or Testing in Saint Joseph?

100% Free, No-Obligation Quotes
Matches You with State-Licensed Champaign County Pros

1-800-299-3578 217-717-8001 (local) Toll-free · Mon–Fri 8am–6pm ET

Radon Readings Near Saint Joseph, IL

No homeowner tests have been submitted for Saint Joseph 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
Homer	7.4 mi	20.00 pCi/L	1
Urbana	7.6 mi	15.00 pCi/L	1
Champaign	11.7 mi	6.67 pCi/L	3
Gifford	12.6 mi	10.00 pCi/L	1
Mahomet	19.0 mi	5.00 pCi/L	1
Danville	21.2 mi	5.33 pCi/L	3
Paxton	23.4 mi	4.00 pCi/L	1
Tuscola	25.4 mi	17.00 pCi/L	1

Champaign County Radon Profile

Because of its underlying geology, Champaign 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 5 cities in Champaign County average 10.00 pCi/L across 7 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 Champaign County home regardless of zone or a neighbor's results.

Radon FAQ for Saint Joseph, IL

What EPA Radon Zone is Saint Joseph in?

Saint Joseph and the 61873 zip code are in Champaign 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 Saint Joseph?

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

Radon mitigation in Saint Joseph 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 Saint Joseph?

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.