Saint Clair, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Saint Clair in?

Saint Clair is in Franklin County, EPA Zone 2.

Q: How much does radon mitigation cost in Saint Clair?

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

Franklin County

EPA Zone 2

Saint Clair, MO resides in Franklin 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. Testing is recommended for all homes in the 63077 zip code area.

Saint Clair, MO Radon Mitigation

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

Saint Clair, MO Radon Testing

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

Saint Clair Radon Facts

Key details about the radon risk profile for Saint Clair and the 63077 zip code area.

EPA Radon Zone

Zone 2 — Moderate Risk

County

Franklin County, MO

Zip Code

63077

Predicted Screening Level

2–4 pCi/L (Zone 2)

Saint Clair and the 63077 zip code are located in Franklin 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 Saint Clair, MO

What EPA Radon Zone is Saint Clair in?

Saint Clair and the 63077 zip code are in Franklin 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 Saint Clair?

Radon mitigation in Saint Clair 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 Saint Clair?

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