Radon Testing & Mitigation in Pacific, MO

In Pacific, MO, Air Sense Environmental tests homes for radon, installs radon mitigation systems, tests indoor air quality and encapsulates crawl spaces. Every radon job in Franklin 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 Pacific, MO?

Yes. Franklin County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Pacific 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. Pacific is an old railroad town in the Meramec valley beneath sandstone bluffs, straddling the Franklin and St. Louis county line.

A Pacific 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 Pacific, MO

A Pacific 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. The St. Louis radon testing page covers how the test works, and the radon testing cost guide holds current pricing.

Radon mitigation in Pacific, MO

When a Pacific 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 the St. Louis radon mitigation services page for the process, documented results and warranty.

Indoor air quality testing in Pacific, MO

An indoor air quality assessment for a Pacific 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 the St. Louis indoor air quality testing page.

Crawl space encapsulation in Pacific, MO

For Pacific 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 Pacific homes does Air Sense Environmental work on?

The Pacific homes the team sees most often:

• Older homes near downtown with stone foundations and cellars
• Homes near the Meramec River with crawl spaces or raised foundations
• Hillside homes with walkout basements
• Newer subdivision homes on poured basements toward Eureka

What should Pacific 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.

Pacific neighborhoods and nearby communities

Air Sense Environmental works across Pacific, MO, including downtown Pacific along Osage Street, the bluff neighborhoods and the subdivisions toward Eureka, in ZIP code 63069. Nearby communities with their own service pages:

• Radon testing and mitigation in Eureka, MO
• Radon testing and mitigation in Wildwood, MO
• Radon testing and mitigation in Ellisville, MO
• Radon testing and mitigation in Fenton, MO
• All Air Sense Environmental service areas

From Our Work