Saint Louis, MO Radon Mitigation and Testing

Q: What EPA Radon Zone is Saint Louis in?

Saint Louis is in St Louis City County, EPA Zone Unknown.

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

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

St Louis City County

EPA Zone Unknown

Spanning multiple zip codes (63101-63109) in St. Louis City, Missouri's historic urban core sits on Mississippi River bluff limestone and alluvial deposits. The city's diverse housing ranges from century-old brick buildings to modern developments, with basement configurations varying significantly by neighborhood. While comprehensive testing data is limited across these zip codes, the underlying limestone geology warrants radon testing for all property types throughout the metropolitan area.

Saint Louis, MO Radon Mitigation

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

Saint Louis, MO Radon Testing

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

Saint Louis Radon Facts

Key details about the radon risk profile for Saint Louis and the 63101 zip code area.

EPA Radon Zone

Unknown

County

St Louis City County, MO

Zip Code

63101

Predicted Screening Level

Unknown

Saint Louis and the 63101 zip code are located in St Louis City County, which has an EPA assigned Radon Zone of Unknown. A radon zone of Unknown does not have sufficient data for classification. The EPA recommends testing every home regardless of zone classification.

Radon FAQ for Saint Louis, MO

What EPA Radon Zone is Saint Louis in?

Saint Louis and the 63101 zip code are in St Louis City County, which has an EPA assigned Radon Zone of Unknown. A zone of Unknown does not have sufficient data for classification.

How much does radon mitigation cost in Saint Louis?

Radon mitigation in Saint Louis 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 Louis?

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