Thompson, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Thompson in?

Thompson is in Audrain County, EPA Zone 2.

Q: How much does radon mitigation cost in Thompson?

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

Audrain County

EPA Zone 2

Found in Audrain County in north-central Missouri, Thompson occupies an area where Prairie Plains geology and glacial till deposits create moderate radon potential. The small community's housing consists primarily of rural residential properties and older farmsteads, many with partial basement foundations. Given the absence of local testing data for zip code 65285, homeowners should consider professional radon testing to assess individual property risk levels.

Thompson, MO Radon Mitigation

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

Thompson, MO Radon Testing

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

Thompson Radon Facts

Key details about the radon risk profile for Thompson and the 65285 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Audrain County, MO

Zip Code

65285

Predicted Screening Level

2–4 pCi/L (Zone 2)

Thompson and the 65285 zip code are located in Audrain 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 Thompson, MO

What EPA Radon Zone is Thompson in?

Thompson and the 65285 zip code are in Audrain 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 Thompson?

Radon mitigation in Thompson 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 Thompson?

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