# Radon Mitigation in Edwardsville, IL

- **URL:** https://airsenseenvironmental.com/service-area/edwardsville-il/radon-mitigation/
- **Published:** 2026-07-20

Skip to content Radon Mitigation Services ▾ Radon Testing Commercial Radon Mitigation Commercial Radon Testing Indoor Air Quality Crawl Space Encapsulation Service Area Resources FAQ Blog Podcast Reviews & Projects About Us Contact 314-664-9807 Free Estimate Radon Mitigation Services Radon Testing Commercial Radon Mitigation Commercial Radon Testing Indoor Air Quality Crawl Space Encapsulation Company Service Area Resources FAQ Blog Podcast Reviews & Projects Case Studies Media Room About Us Contact Call 314-664-9807 Home › Service Area › Edwardsville, IL › Radon Mitigation Service Area · Edwardsville, IL Radon Mitigation in Edwardsville, IL Radon mitigation in Edwardsville, IL lowers indoor radon below the EPA action level of 4.0 pCi/L by drawing soil gas from beneath the foundation and venting it above the roofline. Air Sense Environmental designs and installs sub-slab depressurization systems for Edwardsville homes in Madison County, then proves the result with a post-mitigation test. IEMA-Certified Free In-Home Estimates Call 314-664-9807 Get a Free Estimate Does a Edwardsville home need radon mitigation? A Edwardsville home needs radon mitigation when a test comes back at or above 4.0 pCi/L, and the EPA suggests considering it between 2 and 4 pCi/L. Madison County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Edwardsville homes routinely test well above the 4.0 pCi/L action level. The Illinois Department of Public Health reports that about 41 percent of Illinois homes tested have come back at or above 4.0 pCi/L, and Illinois requires radon professionals to hold an IEMA license. Edwardsville is home to Air Sense Environmental's headquarters, and its housing mixes historic districts such as Leclaire and St. Louis Street, with stone foundations and crawl spaces, and newer subdivisions on poured basements. If the home has not been tested yet, start with radon testing in Edwardsville. Which radon mitigation system fits a Edwardsville home? The system follows the foundation: Basement slab: sub-slab depressurization, the most common system in Edwardsville Crawl space: sub-membrane depressurization under a sealed vapor barrier Sump pit: a sealed sump lid tied into the system, covered in the sump pump radon mitigation guide Slab-on-grade: a suction point routed through a garage, closet or exterior wall Mixed foundations: multiple suction points balanced on one fan The Edwardsville homes Air Sense Environmental mitigates most often: Historic homes in the Leclaire and St. Louis Street districts with stone foundations, cellars or crawl spaces Mid-century ranches and split-levels between downtown and the SIUE campus Newer subdivisions on the north and west sides with poured basements Rental homes and duplexes near SIUE, which landlords test between tenants How is a radon mitigation system installed in Edwardsville? Assessment and diagnostics. The foundation, sump, cracks and pipe route are checked during a free in-home estimate. Suction point. A core hole through the slab, or a sealed membrane in a crawl space, gives the fan something to pull from. Pipe and fan. PVC pipe runs to a fan mounted outside the living space, in the attic, garage or on an exterior wall, and vents above the roofline. Sealing. Cracks, the sump lid and other openings are sealed so the fan can hold suction. Manometer and verification. A U-tube manometer shows the system is running, and a post-mitigation test proves the result. Most Edwardsville installations are completed in a single day. The full walk-through is on the radon mitigation system installation page. How much does radon mitigation cost in Edwardsville, IL? The price depends on the foundation type, the number of suction points and the fan size, so every Edwardsville system is quoted after a free in-home assessment. Current price ranges are kept in one place, the St. Louis radon mitigation cost guide. How do you know the radon mitigation system worked? A post-mitigation radon test is the only proof. Air Sense Environmental includes it, designs Edwardsville systems to a target well below the 4.0 pCi/L action level, and recommends retesting every two years. When a fan eventually wears out, radon fan replacement restores the system. Edwardsville neighborhoods and nearby communities Air Sense Environmental works across Edwardsville, IL, including downtown Edwardsville, the Leclaire historic district and the neighborhoods around Southern Illinois University Edwardsville, in ZIP code 62025. Nearby communities with their own service pages: Radon mitigation and testing in Glen Carbon, IL Radon mitigation and testing in Maryville, IL Radon mitigation and testing in Troy, IL Radon mitigation and testing in Collinsville, IL All Air Sense Environmental service areas Explore More From Air Sense More in Edwardsville, IL Edwardsville, IL hubCrawl Space Encapsulation in Edwardsville, ILIndoor Air Quality in Edwardsville, ILRadon Testing in Edwardsville, IL Radon Mitigation Nearby Radon Mitigation in Eureka, MORadon Mitigation in Festus, MORadon Mitigation in Florissant, MORadon Mitigation in Glen Carbon, IL Learn More Radon Mitigation in St. Louis, MOAll Service AreasReviews & ProjectsGet a Free Estimate Get Your Number Radon under control. Air you can trust. Free in-home estimate, custom-designed system, 24-hour availability. Call 314-664-9807 5237 Old Alton Edwardsville Rd Edwardsville, IL 62025 314-664-9807 · Open 24 hours Jacob Lusby · Illinois IEMA RNM20232346 Services Radon Mitigation Radon Testing Commercial Radon Commercial Radon Testing Radon Fan Replacement Sub-Slab Depressurization Indoor Air Quality Crawl Space Encapsulation Company About Us Service Area Reviews & Projects Case Studies FAQ Blog Podcast Resources Media Room Contact © 2026 Air Sense Environmental. All rights reserved. Radon Mitigation & Testing · St. Louis, MO & Metro East, IL Call 314-664-9807 Free Estimate