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Top-Rated Mold and asbestos pros in O Fallon - Updated Nov 2026

Avatar for AC Environmental, Inc.
AC Environmental, Inc.
5.0(
14
)
Asbestos - TestingAsbestos - AbatementIndoor Air Quality Testing+4 more

Serving O Fallon, MO and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"The workers were punctual and worked hard throughout the entire project. They kept me informed of the progress as the project was being completed. We are very satisfied with their work. I highly recommend AC Environmental for asbestos abatement."
Additional Photos
Additional Photos
Additional Photos
Response time10 hrs
Response rate99%
1 neighbors recently requested a quote
Avatar for The Mold Consultant
The Mold Consultant
4.9(
22
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving O Fallon, MO and surrounding areas

Approved

In business since 2017

Emergency services offered

Small jobs welcome

"My inspection was performed by Steve. The inspection was done because I was smelling mold. Steve was professional, very thorough and arrived ahead of schedule. He provided information to us to take care of the issues that were discovered in the lab report. He continues to answer questions that we have. ð ð »ð ð »ð ð »"
Response time6 hrs
Response rate97%
4 neighbors recently requested a quote
Avatar for Claro Complete Mold Remediation - St. Louis
Claro Complete Mold Remediation - St. Louis
4.8(
71
)
Mold & Toxic Material Test - For BusinessToxicity and Mold - RemovalToxicity and Mold - Removal - For Business

Serving O Fallon, MO and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

At Claro - Complete Mold Remediation - St. Louis, we believe a healthy home starts with the air you breathe. We help families and businesses find mold, fix it at the source, and feel at home again. We serve St. Louis, Clayton, Ladue, Kirkwood, Webster Groves, Creve Coeur, Chesterfield, Ballwin, St. Charles, O’Fallon and surrounding areas. Our services include mold inspection, lab-based mold and air testing with same-day assessments, whole-home and crawlspace mold remediation, water damage cleanup, and commercial mold remediation. \n\nEvery job follows a source-first process: containment, moisture correction, physical removal of contaminated materials, structural drying, and a whole-home dry fog treatment that reaches hidden spores in walls, vents and crawlspaces. We work directly with your insurance company and build every plan around your home and the people living in it.

Recommended by91%of homeowners
Avatar for Mold Test Company MO
Mold Test Company MO
3.8(
83
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving O Fallon, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"The technician was very sweet and made us feel comfortable throughout the inspection. He was very knowledgeable in mold. He helped us understand the different types of mold and the possible causes. We would highly recommend them!!"
Mold Testing
Mold Testing
Mold Testing
Mold Testing
Mold Testing

+70

23 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Allied Environmental, LLC
Allied Environmental, LLC
5.0(
6
)
Asbestos - TestingMold & Toxic Material TestIndoor Air Quality Testing+1 more

Serving O Fallon, 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

6 neighbors recently requested a quote
Avatar for Mold Test Company IL
Mold Test Company IL
3.8(
106
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving O Fallon, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"Henry came to our house. He was very knowledgeable about mold and what to look for. He answered all my questions and was very helpful. Peter who called me with the results was very nice and answered my questions. He even called back the next day when he noticed that an email he sent me didn t go through. They gave me a lot of information to help me continue my search to get rid of my mold and poor air flow."
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection

+78

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