Humphreys, MO Radon Levels

Q: What EPA Radon Zone is Humphreys in?

Humphreys is in Sullivan County, EPA Zone 2.

Q: How much does radon mitigation cost in Humphreys?

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

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

Humphreys, MO Radon Facts

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

County Sullivan County, MO

Zip Code 64646

Situated in Sullivan County in north-central Missouri, Humphreys sits atop glacial till deposits that can produce variable radon conditions throughout the region. With testing data limited for this 64646 area, homeowners should conduct individual radon tests to determine their specific risk levels. Rural communities like Humphreys often feature a mix of foundation types, making professional testing essential for accurate radon assessment.

18.00

pCi/L area average

Above EPA Action Level

Nearby homeowner readings average 18.00 pCi/L, based on 1 test from 1 nearby city. No readings have been submitted for Humphreys 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+

Humphreys, 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 Humphreys, MO

No homeowner tests have been submitted for Humphreys 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
Meadville	23.1 mi	18.00 pCi/L	1

Sullivan County Radon Profile

Sullivan 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 Sullivan 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 Sullivan County.

Radon FAQ for Humphreys, MO

What EPA Radon Zone is Humphreys in?

Humphreys and the 64646 zip code are in Sullivan 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 Humphreys?

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

Radon mitigation in Humphreys 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 Humphreys?

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.