Radon Testing & Mitigation in Maplewood, MO

Air Sense Environmental provides radon testing, radon mitigation, indoor air quality testing and crawl space encapsulation in Maplewood, MO. The company is IEMA-licensed (#RNM20232346) and NRPP-certified, works across St. Louis County from its Edwardsville, Illinois headquarters, and measures every radon job against the EPA action level of 4.0 pCi/L.

Is radon a problem in Maplewood, MO?

Yes. St. Louis County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Maplewood 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. Maplewood is an inner-ring suburb of early 1900s brick homes and four-squares, where stone and brick foundations, cellars and shared walls are the norm.

Radon varies house by house rather than neighborhood by neighborhood. Two homes on the same Maplewood street, built the same year by the same builder, can test at 1 pCi/L and 12 pCi/L because of what sits under each lot and how each foundation was sealed.

Radon testing in Maplewood, MO

Radon testing in Maplewood uses a calibrated continuous radon monitor for a 48-hour closed-house test, with hourly readings and tamper detection that hold up in a real estate transaction. The St. Louis radon testing page covers how the test works, and the radon testing cost guide holds current pricing.

Radon mitigation in Maplewood, MO

Radon mitigation in Maplewood means a sub-slab depressurization system designed around the specific foundation, with the fan outside the living space and a post-mitigation test to prove the result. See radon mitigation in Maplewood for the process, documented results and warranty.

Indoor air quality testing in Maplewood, MO

Indoor air quality testing in Maplewood measures particulates, VOCs, carbon dioxide, carbon monoxide, temperature and humidity over at least 48 hours, with radon as an optional add-on, and ends in a written report. Details are on the St. Louis indoor air quality testing page.

Crawl space encapsulation in Maplewood, MO

Crawl space encapsulation in Maplewood seals the floor and walls with a reinforced vapor barrier, closes the vents and controls humidity with a dehumidifier, which also cuts off a common radon pathway. Read more on the St. Louis crawl space encapsulation page.

Which Maplewood homes does Air Sense Environmental work on?

The Maplewood homes the team sees most often:

• Early 1900s brick homes and four-squares with stone or brick foundations
• Two-family flats, where the first-floor unit sits over the basement
• Bungalows with partial basements and crawl spaces
• Renovated homes with newly finished basements

What should Maplewood 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.

Maplewood neighborhoods and nearby communities

Air Sense Environmental works across Maplewood, MO, including the Manchester Road business district and the neighborhoods around Ryan Hummert Park, in ZIP code 63143. Nearby communities with their own service pages:

• Radon testing and mitigation in Brentwood, MO
• Radon testing and mitigation in Richmond Heights, MO
• Radon testing and mitigation in Webster Groves, MO
• Radon testing and mitigation in St. Louis, MO
• All Air Sense Environmental service areas

From Our Work