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TRUSTED BY ARNOLD, MO HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon15
    Verified mold testing and remediation services reviews

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

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 Arnold, 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 The Mold Consultant
The Mold Consultant
4.9(
22
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Arnold, 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%
4 neighbors recently requested a quote
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 Arnold, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"Jeremiah came out and tested the air and moisture and other items to determine if I had mold in my basement. After getting the test results there was evidence of mold and he recommended a company that provides a do it yourself kit for mold remediation. (Not cheap). After getting the items and realizing that there was more work, it would have been better for me to let my insurance company handle this as I do have coverage for mold/fungi. Though having a professional do the work is expensive, from what Jeremiah mentioned, it does not guarantee that the work will be complete or the source of the problem taken care of. He mentioned most companies will take care of the mold but not necessarily the cause of the mold. For this I would have to contact another company."
Mold Testing
Mold Testing
Mold Testing
Mold Testing
Mold Testing

+70

21 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for MCC Cleaning & Restoration
MCC Cleaning & Restoration
4.4(
183
)
Toxicity and Mold - RemovalToxicity and Mold - Removal - For Business

Serving Arnold, MO and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"The whole experience was amazing! When Eric came to look at the house he explained everything to us so we would understand the process and what to expect. He let me know how common this happens and it even happened to him recently which made me feel better. They were super efficient, quick, and caring. They even use green products which is a plus having a pet. I would recommend them to friends family and anyone else who needs their help with the services they provide. Very affordable for us and money well spent! Thank you so much for making the house feel more comfortable and the air so much cleaner!"
Air Duct Cleaning
Air Duct Cleaning
Air Duct Cleaning
Air Duct Cleaning
Air Duct Cleaning

+22

Response time2 days
Recommended by87%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Yes. Over time, hidden moisture from a leak in your bathroom may lead to black mold, requiring a mold remediation company’s services and the removal of large wall sections, which can be costly. For example, 100 square feet of drywall can cost as much as $400 to replace, while mold remediation can run anywhere from $500 to $3,000.

Both an air purifier and a dehumidifier can help prevent future mold growth, but neither can remove existing mold. An air purifier will improve air quality and trap mold spores in the air, whereas a dehumidifier will reduce moisture in the environment. Keep in mind that you need to make sure your air purifier uses HEPA filters, which are rated for mold removal.

Iron sediments from rusty pipes are not likely to cause health problems. While a glass of yellow-hued water is off-putting, it is generally safe to drink yellow water in the short term. But you certainly want to address this problem. In the meantime, switching to bottled water until the yellow water issue is resolved is a good idea. 

Yes, mold can easily grow under your hardwood floors, especially if your house has recently flooded or if there is a leak from a pipe under the floor. Hardwood floors can trap moisture beneath them, creating the perfect environment for mold to grow. Similarly, mold can also grow under your wood floor’s surface paint.

Touching toxic mushrooms will generally not cause harm unless you consume them. It's important to thoroughly wash hands after handling any type of mushroom to prevent accidental ingestion.  

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

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