Radon Safety Squad
Verified Pro
12+ years online5.0
Radon Mitigation in St. Louis, MO
Compare 23 radon mitigation contractors near you in St. Louis and surrounding area with an average rating of 4.9/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 22, 2026
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Other Businesses in This Area
AAA Radon Services
9+ years onlineAAA Radon Services Inc
5.09+ years onlineAdvanced Radon Control
5.015+ years onlineAir Sense Environmental- Radon Mitigation & Testing
5.02½+ years onlineAmerican Environmental
5.025½+ years onlineAWA Environmental - Saint Louis Mold Inspectors
5.08½+ years onlineBuck Radon Inspection | Radon Testing
5.0EnviroTech Radon Solutions
5.08+ years onlineRadon Control Services
5.010+ years onlineSpotlight Radon Testing
5.06½+ years onlineSt. John Environmental Consulting, LLC
5.07½+ years onlineMiller Environmental Mitigation LLC
4.913½+ years onlineRadon Mitigation Masters
4.9~7 years onlineSt. Louis Radon
4.919½+ years onlineAdvanced Radon Mitigation LLC
4.86½+ years onlineAHIS Inspection & Radon Testing Services
4.8Less Radon
3.210 years onlineRadon Mitigation in Nearby MO Cities
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Radon Mitigation in St. Louis, MO
St. Louis radon mitigation specialists in this directory cover Central West End, the Hill, Soulard, U-City, and surrounding St. Louis County. Missouri falls in EPA Radon Zones 1 and 2 — St. Louis County is largely Zone 1. Sub-slab depressurization on a typical St. Louis basement home runs $1,400-$2,800 installed.
Missouri DHSS publishes county-by-county radon zone maps. Real-estate transactions in St. Louis almost universally include radon testing.
Frequently Asked Questions
- Do most St. Louis homes have radon?
- Yes — St. Louis County is largely EPA Zone 1, and the majority of homes test above 4 pCi/L.
- How long does STL radon mitigation take?
- Sub-slab depressurization is a 1-day job.
- What about radon in crawlspaces?
- Crawlspaces require sealed vapor barrier and active sub-membrane vent fan.
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