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Find Mold & toxic material testers in Saint-Louis

Avatar for The Mold Consultant
The Mold Consultant
4.9(
22
)

Serving Saint-Louis, MO and surrounding areas

Approved

In business since 2017

Emergency services offered

Small jobs welcome

"Very quick to respond, went out and did testing same day. Steve was professional and personable! Recommend highly!!"
Response time6 hrs
Response rate97%
4 neighbors recently requested a quote
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Avatar for Mold Test Company MO
Mold Test Company MO
3.8(
83
)

Serving Saint-Louis, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"Mr Henry Smith was on time, very professional at what he does he not only expained to me what was going on he made sure he answered all of my questions and concerns talking to him about my experience in my home he understood me he was able too show me areas around the outside of my home and pin point the possibility of how and,where the problems occurred I learned a lot mist of all always have my home tested before moving in this would savee and my love ones alot of health issues pain and suffering in the future I would highly recommend the mold testing company to any and everyone who needs assistance with mold it is so worth it thanks Mr Henry Smith and the molding company"
Mold Testing
Mold Testing
Mold Testing
Mold Testing
Mold Testing

+70

25 neighbors recently requested a quote
Recommended by82%of homeowners
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Avatar for AC Environmental, Inc.
AC Environmental, Inc.
5.0(
14
)

Serving Saint-Louis, MO and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Given the awful circumstances (house fire), we had a great experience with AC Environmental. They were quick, courteous and professional. As with every service, problems can occur. How a company reacts to a problem says a lot to their commitment to the customer. There was a minor problem in removing our asbestos, I called AC Environmental and Dustin was out at our house resolving it within hours! I was surprised and very pleased."
Additional Photos
Additional Photos
Additional Photos
Response time10 hrs
Response rate99%
2 neighbors recently requested a quote
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Avatar for Mold Test Company IL
Mold Test Company IL
3.8(
105
)

Serving Saint-Louis, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"I love the quality of service. First call I made to Mold Test told me I was working with the right company. Reid who made all things come together. to the home inspector. Very informative on what they are doing and why. I will refer Mold Test Co. to all my friends ."
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection

+78

Response time1 day
260 neighbors recently requested a quote
Recommended by80%of homeowners
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Avatar for Allied Environmental, LLC
Allied Environmental, LLC
5.0(
5
)

Serving Saint-Louis, MO and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

Professional Environmental Consulting Services specializing in asbestos inspections/testing, mold inspections, and indoor air quality testing for residential, commercial, and demolition projects. Reliable, thorough, and compliant inspections to help keep your property safe and meet local and state regulations. Contact us today for fast scheduling and expert service.

Exterior of Home
Interior
Interior of Building
Interior of Building
Commercial Building

+9

3 neighbors recently requested a quote
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Showing 1-10 of 39
FAQs for mold & toxic material test projects in Saint-Louis, MO

Some companies offer a no‑cost phone or video consultation that screens for red flags. If the discussion points to a real issue, the pro will recommend a paid on‑site inspection. The complimentary call clarifies whether you need full testing, but it isn’t a substitute for samples, lab work, or a written report. Always confirm what the free service covers before you schedule.

A standard inspection, which includes basic air and surface samples, takes an average of two hours. If the pro needs to probe hidden spaces, such as wall cavities or ductwork, plan on up to six hours. Extra time allows the inspector to reach tight areas, collect additional samples, and document findings. Lab analysis is a separate process and often adds several business days to the overall timeframe before you receive the full report.

Mold thrives where moisture lingers and air flow is poor. Common hotspots include bathroom walls, kitchen backsplashes, window sills, HVAC vents, fireplaces, crawl spaces, and enclosed attics. Check these areas regularly—especially after leaks or high‑humidity weather—to catch growth early and avoid costly repairs.

Unchecked mold can knock 20% to 37% off a home’s market value because buyers worry about hidden damage and health risks. Even after remediation, visible staining or a history of major moisture issues can still lower offers and prolong the time on the market. Addressing mold quickly protects both your property’s structural integrity and its resale appeal.

The Saint-Louis, MO homeowners’ guide to mold & toxic material tests

From average costs to expert advice, get all the answers you need to get your job done.

See all articles