Doniphan, MO Radon Levels

Q: What EPA Radon Zone is Doniphan in?

Doniphan is in Ripley County, EPA Zone 2.

Q: How much does radon mitigation cost in Doniphan?

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

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

Doniphan, MO Radon Facts

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

County Ripley County, MO

Zip Code 63935

Found in Ripley County in southeastern Missouri's Ozark region, Doniphan sits in EPA Zone 2 where dolomite and limestone bedrock can contribute to moderate radon levels in homes. Testing data for the 63935 area remains limited, making individual radon testing important for residents. The community's mix of older homes and mobile housing, many built on crawl spaces or pier foundations common to the region, may present varying radon entry pathways.

3.00

pCi/L area average

Below EPA Action Level

Nearby homeowner readings average 3.00 pCi/L, based on 1 test from 1 nearby city. No readings have been submitted for Doniphan 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+

Doniphan, 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 Doniphan, MO

No homeowner tests have been submitted for Doniphan 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
Ellsinore	20.7 mi	3.00 pCi/L	1

Ripley County Radon Profile

EPA mapping assigns Ripley 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 Ripley 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 Ripley County home regardless of zone or a neighbor's results.

Radon FAQ for Doniphan, MO

What EPA Radon Zone is Doniphan in?

Doniphan and the 63935 zip code are in Ripley 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 Doniphan?

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

Radon mitigation in Doniphan 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 Doniphan?

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.