Radon Mitigation in St. Peters, MO

A radon mitigation system in St. Peters, MO is a sealed pipe and a continuously running fan that pull radon from under the house and release it outdoors, bringing the home below the EPA action level of 4.0 pCi/L. Air Sense Environmental, IEMA-licensed (#RNM20232346) and NRPP-certified, designs each St. Peters system around the foundation in front of it.

Does a St. Peters home need radon mitigation?

The trigger is the test result: at or above 4.0 pCi/L the EPA recommends fixing a St. Peters home, and between 2 and 4 pCi/L it suggests considering it. St. Charles County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual St. Peters homes routinely test well above the 4.0 pCi/L action level. Missouri’s Department of Health and Senior Services reports that roughly one in three homes tested through its statewide program between 2003 and 2023 came back at or above 4.0 pCi/L.

St. Peters was built out mainly between the 1970s and 1990s, so its ranch, split-level and two-story homes sit on poured basements that are now 30 to 50 years old, and the finished lower levels are where families spend their time. If the home has not been tested yet, start with radon testing in St. Peters.

Which radon mitigation system fits a St. Peters home?

The system follows the foundation:

• Basement slab: sub-slab depressurization, the most common system in St. Peters
• 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 St. Peters homes Air Sense Environmental mitigates most often:

• 1970s and 1980s ranch and split-level homes off Mexico Road and Jungermann Road
• Two-story homes from the 1990s with finished basements used as bedrooms or offices
• Homes near Mid Rivers Mall built during the city’s fastest growth
• Newer villas and townhomes on slab foundations

How is a radon mitigation system installed in St. Peters?

1. Assessment and diagnostics. The foundation, sump, cracks and pipe route are checked during a free in-home estimate.
2. Suction point. A core hole through the slab, or a sealed membrane in a crawl space, gives the fan something to pull from.
3. 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.
4. Sealing. Cracks, the sump lid and other openings are sealed so the fan can hold suction.
5. Manometer and verification. A U-tube manometer shows the system is running, and a post-mitigation test proves the result.

Most St. Peters 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 St. Peters, MO?

Foundation type, suction points and fan size set the price of a St. Peters system, which is why quotes follow a free in-home assessment. The St. Louis radon mitigation cost guide lists the current ranges by system type.

How do you know the radon mitigation system worked?

A post-mitigation radon test is the only proof. Air Sense Environmental includes it, designs St. Peters 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.

St. Peters neighborhoods and nearby communities

Air Sense Environmental works across St. Peters, MO, including the Mid Rivers Mall area, the Mexico Road corridor and the neighborhoods off Jungermann Road, in ZIP code 63376. Nearby communities with their own service pages:

• Radon mitigation and testing in St. Charles, MO
• Radon mitigation and testing in O’Fallon, MO
• Radon mitigation and testing in Wentzville, MO
• Radon mitigation and testing in Maryland Heights, MO
• All Air Sense Environmental service areas