Callao, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Callao in?

Callao is in Macon County, EPA Zone 2.

Q: How much does radon mitigation cost in Callao?

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

Macon County

EPA Zone 2

Found in north-central Missouri's Macon County, Callao (63534) sits in EPA Zone 2 over limestone and shale formations that can produce moderate radon concentrations. The area's mix of older farmhouses and newer rural homes features varying foundation types that influence radon entry potential. With limited local testing data available, residents should conduct individual home testing to determine their specific radon exposure levels.

Callao, MO Radon Mitigation

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

Callao, MO Radon Testing

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

Callao Radon Facts

Key details about the radon risk profile for Callao and the 63534 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Macon County, MO

Zip Code

63534

Predicted Screening Level

2–4 pCi/L (Zone 2)

Callao and the 63534 zip code are located in Macon 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 Callao, MO

What EPA Radon Zone is Callao in?

Callao and the 63534 zip code are in Macon 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 Callao?

Radon mitigation in Callao 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 Callao?

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