Radon Testing & Mitigation in Ellisville, MO

Ellisville, MO homeowners call Air Sense Environmental for four things: radon testing, radon mitigation, indoor air quality testing and crawl space encapsulation. The NRPP-certified, IEMA-licensed (#RNM20232346) team serves St. Louis County from Edwardsville, Illinois, and designs every radon system to bring the home below the EPA action level of 4.0 pCi/L.

Is radon a problem in Ellisville, 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 Ellisville 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. Ellisville is a west St. Louis County city of 1960s to 1980s subdivisions where Manchester Road meets Clarkson Road, built on the same clay-over-limestone upland as its neighbors.

Because radon depends on the ground under a single lot and the openings in a single foundation, Ellisville results change from address to address. Testing the specific house is the only way to know where it stands.

Radon testing in Ellisville, MO

For radon testing in Ellisville, Air Sense Environmental places a continuous monitor on the lowest livable level for 48 hours and delivers a documented report against the 4.0 pCi/L action level. The St. Louis radon testing page covers how the test works, and the radon testing cost guide holds current pricing.

Radon mitigation in Ellisville, MO

A Ellisville radon mitigation system pulls soil gas from beneath the slab or crawl space membrane and vents it above the roofline; every install ends with a verification test. See the St. Louis radon mitigation services page for the process, documented results and warranty.

Indoor air quality testing in Ellisville, MO

For indoor air quality in Ellisville, a continuous monitor tracks particulates, VOCs, carbon dioxide, carbon monoxide and humidity, and the report shows which readings sit outside healthy ranges. Details are on the St. Louis indoor air quality testing page.

Crawl space encapsulation in Ellisville, MO

A sealed, conditioned crawl space keeps ground moisture and soil gas from rising into a Ellisville home; Air Sense Environmental installs the barrier, seals the vents and sizes the dehumidifier. Read more on the St. Louis crawl space encapsulation page.

Which Ellisville homes does Air Sense Environmental work on?

The Ellisville homes the team sees most often:

• 1960s to 1980s two-story and split-level homes with basements
• Ranch homes with finished lower levels
• Walkout-basement homes on sloped lots near Bluebird Park
• Newer infill homes on poured foundations

What should Ellisville 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.

Ellisville neighborhoods and nearby communities

Air Sense Environmental works across Ellisville, MO, including the Manchester and Clarkson Road corridors and the neighborhoods around Bluebird Park, in ZIP codes 63011 and 63021. Nearby communities with their own service pages:

• Radon testing and mitigation in Ballwin, MO
• Radon testing and mitigation in Wildwood, MO
• Radon testing and mitigation in Chesterfield, MO
• Radon testing and mitigation in Valley Park, MO
• All Air Sense Environmental service areas

From Our Work