Air Sense Environmental, located at 5237 Old Alton Edwardsville Rd, provides expert radon testing and radon mitigation for homes and businesses across the St. Louis metro. As a trusted radon mitigation contractor, we design the right radon system and complete fast radon system installation using proven sub-slab depressurization. Need radon St Louis service, a radon contractor St Louis, or radon installation for a new or existing property? Owner-operated and NRPP-certified, we deliver clear results, free in-home estimates, and post-mitigation testing to help keep radon levels below EPA guidelines.