Marshall, MO Radon Levels

Q: What EPA Radon Zone is Marshall in?

Marshall is in Saline 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, MO Radon Facts

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

County Saline County, MO

Zip Code 65340

Located in central Missouri's Saline County, Marshall sits above limestone and shale formations that can contribute to moderate radon levels throughout the region. With no current testing data available for zip codes 65302 and 65340, residents should conduct baseline radon testing. Missouri's varied geology often produces readings that require individual property evaluation.

5.88

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 5.88 pCi/L, based on 8 tests from 8 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, MO 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, MO

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
Sedalia	16.4 mi	6.00 pCi/L	1
Boonville	26.4 mi	4.00 pCi/L	1
Warrensburg	28.8 mi	9.00 pCi/L	1
Carrollton	33.0 mi	6.00 pCi/L	1
Cole Camp	33.2 mi	5.00 pCi/L	1
Richmond	46.5 mi	5.00 pCi/L	1
Warsaw	48.3 mi	5.00 pCi/L	1
Oak Grove	48.8 mi	7.00 pCi/L	1

Saline County Radon Profile

Saline 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 Saline 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 Saline County.

Radon FAQ for Marshall, MO

What EPA Radon Zone is Marshall in?

Marshall and the 65340 zip code are in Saline 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 Saline 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.