Top-rated mold & toxic material testers.

Get matched with top mold & toxic material testers in Saint-louis, MO

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

"They responded very quickly and sounded very knowledgeable. The test results were sent the following day. This is a minor thing but the inspector talked in technical terms which I did not understand. I wish he could have explained more. However, on the report I received all the technical terms were clearly defined in a way I could understand. A suggestion would be to provide the customer with the explanation of thes terms at the time if the inspection or talk to the customer in terms they can understand."
Response time6 hrs
Response rate97%
2 neighbors recently requested a quote
Avatar for Mold One Missouri
Mold One Missouri
4.8(
20
)

Serving Saint-louis, MO and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"The Mold One Missouri was very professional from the start to the end. They even came back to our house to redo a mold test in one of the rooms. All this happened September 2022."
Total Home sterilization
bedroom
bathroom drains
moisture intrusion
black mold

+4

Response time11 hrs
Response rate96%
132 neighbors recently requested a quote
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

"I thought he did a good job explaining what he did do but very disappointed they didn't explain that you had to pay a lot extra money to actually find out what kind of mold if any you had. The $199.00 fee they only looked for mold & tested the air quality. If they found any mold it cost a lot more to find out what type. He did say we had mold in our crawl space but not what kind, that cost more money. Overall good for what he did do."
Mold Testing
Mold Testing
Mold Testing
Mold Testing
Mold Testing

+70

16 neighbors recently requested a quote
Recommended by82%of homeowners
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

"Overall was good for what the service is. The technician was a postal worker and home inspector. So mold test company appears to be brokers. Their pricing was competitive from other quotes I received but I honestly think it was pricey for time spent and what they do. But like I said the price was pretty standard from the companies I called, in my opinion. But the technician was attentive and knowledgeable, and friendly."
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection

+78

Response time1 day
275 neighbors recently requested a quote
Recommended by80%of homeowners
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

Avatar for Scope Environmental
Scope Environmental
5.0(
15
)

Serving Saint-louis, MO and surrounding areas

In business since 2023

Free estimates

Small jobs welcome

"I used Scope Environmental recently to test floor tile and the underlying mastic to determine if either contained asbestos. I selected Scope because Jeff was very responsive, professional, independent of the abatement companies and his price was competitive. Jeff suggested testing both the tiles and mastic. The tiles tested positive for asbestos but the mastic contained no asbestos. As a result, I saved considerable expense by abating the tiles only and not the mastic so I also used Scope again for the post abatement air testing rather than the abatement company. I would hire Scope again for material and air testing for asbestos, mold or any other potentially toxic materials."
Black mold inside closet
Mold growth in HVAC Closet
Asbestos Flooring
Floor sample collection
Asbestos Adhesive

+10

Response time4 hrs
Response rate96%
Recommended by73%of homeowners
Showing 1-10 of 41
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.