Doniphan, MO Radon Mitigation and Testing

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.

Ripley County

EPA Zone 2

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.

Doniphan, MO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

Doniphan, MO Radon Testing

Finding qualified radon testing professionals is the first step toward protecting your home.

Doniphan Radon Facts

Key details about the radon risk profile for Doniphan and the 63935 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Ripley County, MO

Zip Code

63935

Predicted Screening Level

2–4 pCi/L (Zone 2)

Doniphan and the 63935 zip code are located in Ripley County, which has an EPA assigned Radon Zone of 2. A radon zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L. The EPA recommends testing every home regardless of zone classification.

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.

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.

Most Active Radon Markets in Missouri

Cities with the most user-submitted radon test data in the state.

City	Avg User Radon Level	Submissions
Troy	8.50 pCi/L	4
Lees Summit	7.00 pCi/L	3
Columbia	3.00 pCi/L	2
House Springs	7.00 pCi/L	1
Kansas City	7.00 pCi/L	1
Springfield	7.00 pCi/L	1
Independence	5.00 pCi/L	1
Wentzville	No submissions	0