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Top-Rated Mold testing and remediation specialists in Saint Clair - Updated Nov 2026

Avatar for Claro Complete Mold Remediation - St. Louis
Claro Complete Mold Remediation - St. Louis
4.8(
76
)
Toxicity and Mold - RemovalMold & Toxic Material Test - For BusinessToxicity and Mold - Removal - For Business

Serving Saint Clair, 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.

4 neighbors recently requested a quote
Recommended by84%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 Saint Clair, 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

23 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Scope Environmental
Scope Environmental
5.0(
15
)
Indoor Air Quality TestingMold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Saint Clair, 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
Avatar for Advanced Foundation Repair & Replacement
Advanced Foundation Repair & Replacement
5.0(
30
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Saint Clair, MO and surrounding areas

Emergency services offered

"They were responsive to every call, did the work professionally and cleaned up nicely.  We would not hesitate to recommend them to friends and family.  We had two leaning columns in the back yard that are now straight and piered so they will never shift again.  They then removed a large area of cracked cement and relayed.  It looks fantastic!
"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Recommended by100%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Most mushrooms found on residential lawns are harmless. Certain varieties such as destroying angel, fly agaric, and vomiter mushrooms that can grow in grass will occasionally make their way onto residential lawn, but this is uncommon. Since mushrooms can be notoriously difficult to identify, if you suspect that your lawn mushrooms could be a poisonous type, consulting a professional is recommended.

While mold in the bathroom can appear black, it isn’t always the dangerous black mold strain Stachybotrys chartarum. This type of mold typically appears after a flood or a long-term leak. If you suspect black mold, you should get it tested by a local mold testing service to determine whether it’s safe to remove yourself.

Mold in air ducts releases spores into the air, which cause allergic reactions and respiratory issues. Common symptoms include coughing, sneezing, or itchy eyes. Prolonged mold exposure can lead to more serious health issues, especially for those with compromised immune systems.

It is common for mold to grow around air vents, especially in areas with high humidity or moisture problems. These vents provide a perfect environment for mold to thrive due to the condensation caused by the meeting of warm and cool air. Mold growth can be accelerated by the presence of dust and debris around the vents. Regular maintenance, proper ventilation, and addressing any water leaks or excess humidity can prevent the growth of mold around air vents.

Homes should be checked for mold annually, especially if you live in an area with high humidity or frequent rainfall. Inspections are crucial following flooding, roof leaks, or plumbing issues. More frequent checks are necessary if your home has a history of mold problems or water damage. Regular inspections help detect mold early, preventing costly remediation and minimizing health risks, especially in moisture-prone areas such as basements and bathrooms.

The Saint Clair, MO homeowners’ guide to mold testing and remediation services

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