Coulterville, IL Radon Levels

Q: What EPA Radon Zone is Coulterville in?

Coulterville is in Perry County, EPA Zone 2.

Q: How much does radon mitigation cost in Coulterville?

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

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

Coulterville, IL Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Perry County, IL

Zip Code 62237

Southern Illinois community Coulterville in Perry County falls within EPA Zone 2 for moderate radon potential across the region. The area's coal-bearing shale and sandstone formations typical of the Illinois Basin create geological conditions that can facilitate radon gas movement, though levels are generally lower than northern Illinois. With testing data for zip code 62237 currently limited, homeowners should consider radon testing to establish their individual risk profile.

8.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 8.00 pCi/L, based on 21 tests from 10 nearby cities. No readings have been submitted for Coulterville 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+

Coulterville, 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 Coulterville, IL

No homeowner tests have been submitted for Coulterville 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
Marissa	7.4 mi	4.00 pCi/L	1
Campbell Hill	17.8 mi	1.00 pCi/L	1
Mascoutah	22.0 mi	6.50 pCi/L	2
Waterloo	29.0 mi	9.20 pCi/L	5
O Fallon	30.5 mi	6.00 pCi/L	1
Lebanon	30.8 mi	10.50 pCi/L	2
Belleville	31.1 mi	7.33 pCi/L	3
Carlyle	33.1 mi	13.00 pCi/L	1

Perry County Radon Profile

EPA mapping assigns Perry County to Radon Zone 2, indicating moderate predicted indoor screening levels in the 2 to 4 pCi/L range based on regional geology. Direct test data for Perry 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 Perry County home regardless of zone or a neighbor's results.

Radon FAQ for Coulterville, IL

What EPA Radon Zone is Coulterville in?

Coulterville and the 62237 zip code are in Perry County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Coulterville?

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

Radon mitigation in Coulterville 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 Coulterville?

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.