Radon Testing & Mitigation in St. Peters, MO

In St. Peters, MO, Air Sense Environmental tests homes for radon, installs radon mitigation systems, tests indoor air quality and encapsulates crawl spaces. Every radon job in St. Charles County is measured against the EPA action level of 4.0 pCi/L, and the team is NRPP-certified and IEMA-licensed (#RNM20232346).

Is radon a problem in St. Peters, MO?

Yes. 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.

A St. Peters neighbor’s reading is a signal, not an answer. The soil under one lot, the cracks in one slab and the way one sump pit was sealed decide the number, which is why two similar homes a few doors apart can land on opposite sides of the action level.

Radon testing in St. Peters, MO

A St. Peters radon test runs 48 hours under closed-house conditions on a calibrated continuous monitor, and the report shows the hourly data as well as the average. Radon testing in St. Peters covers how the test works, and the radon testing cost guide holds current pricing.

Radon mitigation in St. Peters, MO

When a St. Peters home tests at or above 4.0 pCi/L, the same team designs and installs the radon mitigation system, usually in a single day, and retests to confirm the home is below the action level. See radon mitigation in St. Peters for the process, documented results and warranty.

Indoor air quality testing in St. Peters, MO

An indoor air quality assessment for a St. Peters home logs particulate matter, chemical vapors, CO2, CO and humidity at one-minute intervals for 48 hours or more, so the fix is based on data. Details are on indoor air quality in St. Peters.

Crawl space encapsulation in St. Peters, MO

For St. Peters homes with a crawl space, encapsulation lays a sealed vapor barrier over the soil and walls and adds humidity control, keeping damp air and soil gas out of the rooms above. Read more on the St. Louis crawl space encapsulation page.

Which St. Peters homes does Air Sense Environmental work on?

The St. Peters homes the team sees 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

What should St. Peters homeowners expect?

1. Test first. A 48-hour continuous monitor test gives the number everything else depends on.
2. Read the report together. You get the hourly data and a plain explanation of what it means for the house.
3. Design the fix. If the reading is at or above 4.0 pCi/L, the system is designed around your foundation during a free in-home estimate.
4. Install and verify. Most systems go in within a single day, and a post-mitigation test confirms the result.

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

From Our Work