# Radon Mitigation in Belleville, IL

- **URL:** https://airsenseenvironmental.com/service-area/belleville-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 › Belleville, IL › Radon Mitigation Service Area · Belleville, IL Radon Mitigation in Belleville, IL Radon mitigation in Belleville, IL fixes a home that tested at or above the EPA action level of 4.0 pCi/L. Air Sense Environmental installs sub-slab and sub-membrane depressurization systems across St. Clair County, routes the fan outside the living space, and retests to confirm the number came down. IEMA-Certified Free In-Home Estimates Call 314-664-9807 Get a Free Estimate Does a Belleville home need radon mitigation? Mitigation follows measurement. If a Belleville home tests at or above 4.0 pCi/L the EPA recommends a system, and readings between 2 and 4 pCi/L are worth discussing. St. Clair County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Belleville 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. Belleville is one of the oldest cities in the Metro East, and its housing runs from 19th-century brick near downtown to post-war ranches and newer subdivisions on the east side. If the home has not been tested yet, start with radon testing in Belleville. Which radon mitigation system fits a Belleville home? The system follows the foundation: Basement slab: sub-slab depressurization, the most common system in Belleville 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 Belleville homes Air Sense Environmental mitigates most often: Brick homes near downtown and the Belleville historic districts with stone or brick foundations and cellars Post-war ranch homes from the 1950s and 1960s with poured or block basements Homes near Scott Air Force Base built for the base community in the 1970s and 1980s Newer construction east of Green Mount Road, including slab-on-grade homes How is a radon mitigation system installed in Belleville? 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 Belleville 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 Belleville, IL? Air Sense Environmental quotes each Belleville job after seeing the foundation, because suction points and fan size drive the cost. For current ranges by system type, see 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 Belleville 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. Belleville neighborhoods and nearby communities Air Sense Environmental works across Belleville, IL, including downtown Belleville, the Signal Hill area and the neighborhoods toward Scott Air Force Base, in ZIP codes 62220, 62221, 62223 and 62226. Nearby communities with their own service pages: Radon mitigation and testing in O’Fallon, IL Radon mitigation and testing in Swansea, IL Radon mitigation and testing in Fairview Heights, IL Radon mitigation and testing in Collinsville, IL All Air Sense Environmental service areas Explore More From Air Sense More in Belleville, IL Belleville, IL hubIndoor Air Quality in Belleville, ILRadon Testing in Belleville, IL Radon Mitigation Nearby Radon Mitigation in Brentwood, MORadon Mitigation in Chesterfield, MORadon Mitigation in Clayton, MO 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