Radon Testing & Mitigation in Maryville, IL

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

Yes. Madison County is in EPA Radon Zone 2, where the predicted average indoor radon level is 2 to 4 pCi/L, and individual Maryville 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. Maryville grew quickly from the 1990s onward between Collinsville and Glen Carbon, so most of its housing is newer subdivision construction on poured basements.

A Maryville 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 Maryville, IL

A Maryville 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 Maryville, IL

When a Maryville 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 Maryville, IL

An indoor air quality assessment for a Maryville 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 Maryville, IL

For Maryville 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 Maryville homes does Air Sense Environmental work on?

The Maryville homes the team sees most often:

• 1990s to 2010s two-story homes on poured basements
• Homes with finished basements used as bedrooms and offices
• Villas and townhomes on slab foundations
• Older homes in the original village along Route 159

What should Maryville 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.

Maryville neighborhoods and nearby communities

Air Sense Environmental works across Maryville, IL, including the Route 159 corridor, the neighborhoods near Anderson Hospital and the subdivisions toward Troy, in ZIP code 62062. Nearby communities with their own service pages:

• Radon testing and mitigation in Glen Carbon, IL
• Radon testing and mitigation in Collinsville, IL
• Radon testing and mitigation in Troy, IL
• Radon testing and mitigation in Edwardsville, IL
• All Air Sense Environmental service areas

From Our Work