Marshall, IL Radon Levels

Q: What EPA Radon Zone is Marshall in?

Marshall is in Clark County, EPA Zone 2.

Q: How much does radon mitigation cost in Marshall?

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

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

Marshall, IL Radon Facts

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

County Clark County, IL

Zip Code 62441

Found in east-central Illinois's Clark County, Marshall sits above deep glacial moraine deposits over limestone bedrock that contribute to moderate-to-high radon potential across the region. Testing data for zip code 62441 remains sparse, making individual home testing essential for residents. The area's geological conditions typical of central Illinois prairie warrant careful attention to radon levels.

12.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 12.00 pCi/L, based on 12 tests from 7 nearby cities. No readings have been submitted for Marshall 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+

Marshall, 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 Marshall, IL

No homeowner tests have been submitted for Marshall 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
Paris	13.2 mi	9.67 pCi/L	3
Charleston	26.2 mi	8.00 pCi/L	1
Palestine	29.3 mi	18.50 pCi/L	2
Mattoon	36.7 mi	9.33 pCi/L	3
Tuscola	40.8 mi	17.00 pCi/L	1
Homer	44.7 mi	20.00 pCi/L	1
Bridgeport	49.6 mi	5.00 pCi/L	1

Clark County Radon Profile

Clark County is mapped as EPA Radon Zone 2, where the local geology is predicted to produce moderate indoor screening levels between 2 and 4 pCi/L. User-submitted readings are still sparse within Clark County itself, so the nearby measurements shown on this page provide the closest real-world picture of local radon conditions. Radon is the second leading cause of lung cancer in the United States, and a short-term test is the only way to confirm a specific home's level in Clark County.

Radon FAQ for Marshall, IL

What EPA Radon Zone is Marshall in?

Marshall and the 62441 zip code are in Clark 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 Marshall?

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

Radon mitigation in Marshall 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 Marshall?

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.