Radon Testing & Mitigation in Creve Coeur, MO

Air Sense Environmental provides radon testing, radon mitigation, indoor air quality testing and crawl space encapsulation in Creve Coeur, 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 Creve Coeur, 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 Creve Coeur 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. Creve Coeur grew in the 1950s to 1970s with ranch homes on large lots, and many of those lots now carry newer, tighter homes on deep poured basements.

Radon varies house by house rather than neighborhood by neighborhood. Two homes on the same Creve Coeur 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 Creve Coeur, MO

Radon testing in Creve Coeur 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 Creve Coeur, MO

Radon mitigation in Creve Coeur 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 the St. Louis radon mitigation services page for the process, documented results and warranty.

Indoor air quality testing in Creve Coeur, MO

Indoor air quality testing in Creve Coeur 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 Creve Coeur, MO

Crawl space encapsulation in Creve Coeur 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 Creve Coeur homes does Air Sense Environmental work on?

The Creve Coeur homes the team sees most often:

• 1950s to 1970s ranch homes with full basements
• Newer custom homes with finished lower levels
• Villas and condominiums with ground-level units
• Homes with walkout basements on sloped lots

What should Creve Coeur 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.

Creve Coeur neighborhoods and nearby communities

Air Sense Environmental works across Creve Coeur, MO, including the Olive Boulevard corridor and the neighborhoods off Ladue Road and Mason Road, in ZIP code 63141. Nearby communities with their own service pages:

• Radon testing and mitigation in Maryland Heights, MO
• Radon testing and mitigation in Chesterfield, MO
• Radon testing and mitigation in Des Peres, MO
• Radon testing and mitigation in University City, MO
• All Air Sense Environmental service areas

From Our Work