Radon Testing & Mitigation in Swansea, IL

Air Sense Environmental provides radon testing, radon mitigation, indoor air quality testing and crawl space encapsulation in Swansea, IL. The company is IEMA-licensed (#RNM20232346) and NRPP-certified, works across St. Clair 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 Swansea, IL?

Yes. St. Clair County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Swansea homes routinely test well above the 4.0 pCi/L action level. The Illinois Department of Public Health reports that about 41 percent of Illinois homes tested have come back at or above 4.0 pCi/L, and Illinois requires radon professionals to hold an IEMA license. Swansea is a St. Clair County village between Belleville and Fairview Heights, with mid-century homes near its older core and newer subdivisions on poured basements to the north.

Radon varies house by house rather than neighborhood by neighborhood. Two homes on the same Swansea 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 Swansea, IL

Radon testing in Swansea 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 Swansea, IL

Radon mitigation in Swansea 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 Swansea for the process, documented results and warranty.

Indoor air quality testing in Swansea, IL

Indoor air quality testing in Swansea 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 Swansea, IL

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

The Swansea homes the team sees most often:

• Mid-century ranch homes with basements
• 1990s and 2000s subdivision homes on poured basements
• Homes near Scott Air Force Base bought and sold on military timelines
• Villas on slab foundations

What should Swansea 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.

Swansea neighborhoods and nearby communities

Air Sense Environmental works across Swansea, IL, including the Route 159 corridor, the neighborhoods around Melvin Price Memorial Park and the subdivisions toward Fairview Heights, in ZIP code 62226. Nearby communities with their own service pages:

• Radon testing and mitigation in Belleville, IL
• Radon testing and mitigation in Fairview Heights, IL
• Radon testing and mitigation in O’Fallon, IL
• Radon testing and mitigation in Millstadt, IL
• All Air Sense Environmental service areas

From Our Work