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Top-Rated Mold testing and remediation specialists in Waterloo - 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 Waterloo, IL 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.

Crawlspace Waterproofing
Crawlspace Waterproofing
Crawlspace Waterproofing
Crawlspace Waterproofing
4 neighbors recently requested a quote
Recommended by84%of homeowners
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 Waterloo, IL and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"My review is tiered because the overall service seems to run on tiers. The technician was great. Very personable and professional. 5 stars for his work. Your tests get sent to the lab. The lab explains the results and recommends a company for a DIY solution. This is where things start to fall apart. The company you get referred to has abysmal reviews and the sales pitch feels extremely predatory. That taints my opinion of the lab results which would be teamed up with a business they probably shouldn't recommend. We're planning on either an independent company locally to get a quote from for any remediations we will take or even see what home depot has to offer. In any event please read the reviews of BioCide, the company they will recommend you use. We're still not sure we even have a real problem if they are working together."
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection

+78

Response time1 day
267 neighbors recently requested a quote
Recommended by80%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 Waterloo, IL 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

23 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Safety Environmental Testing
Safety Environmental Testing
5.0(
1
)
Mold & Toxic Material Test

Serving Waterloo, IL and surrounding areas

Approved

In business since 2015

Credit card accepted

Customers say: Quick response

We are a locally owned and operated company that values honesty and integrity and treats your home improvement project as if it were our own. We offer a wide range of mold testing expertise and experience to meet the specific needs of our clients. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

Aspergillus/Pencillium Types of Mold
Water Damage and Mold Growth
Aspergillus/Pencillium Types of Mold
Response time40 mins
Recommended by100%of homeowners
Avatar for Absolute Clean
Absolute Clean
5.0(
25
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Waterloo, IL and surrounding areas

In business since 2010

Emergency services offered

Credit card accepted

"My water line broke to the hot water heater. My son contacted Absolute Clean. It was a pleasure working with Scott to get the mold taken care of and the rebuild. A few weeks later I found a problem and Scott didn't hesitate to take care of it also."
 Before
After
 After
 After
Tile before

+15

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

The duration of mildew smell in carpets depends on several factors, including the extent of moisture, cleanliness, and ventilation. If promptly addressed, the smell can diminish within a few days to a couple of weeks after thoroughly drying and cleaning the carpet. However, in severe cases or if not properly treated, the smell might persist. Persistent odors could indicate deeper mildew growth, requiring professional cleaning or, in extreme cases, carpet replacement to completely eliminate the smell.

Both wood-burning stoves and fireplaces can emit smoke and other combustion gases that are harmful to human health. According to the American Lung Association, wood smoke can lead to coughing and wheezing as well as long-term health impacts like increased risks for heart attacks and stroke. 

Newer models meet the modern efficiency standards set in 2020 by the Environmental Protection Agency for cleaner burning, more efficient wood stoves. Regular maintenance can also minimize smoke.

Yes, carpet mold can spread if not addressed properly or quickly. Mold can spread to underneath the carpet, impacting the subfloor or attached walls. Mold and mildew can spread within the first 72 hours, so it is important to address the problem quickly and remove any affected carpet. 

You probably have mold on your shower curtains because mold and mildew thrive and spread in warm, dark, wet, and unventilated spaces. Your shower is the perfect environment, especially the shower curtains, because they trap water in the folds and creases, plus they’re exposed to the most water spray. The best way to ensure mold stays off your shower curtains is to keep it dry so it doesn’t have a place to grow. Doing this can also help keep mold off your bathroom ceiling.

You can find the smell of mold in your house in two ways: following your nose, and using common sense tactics like looking anywhere there’s water first. Mold cannot form in a completely dry environment, which is why you see mold much more often under kitchen sinks than on garage floors. If you have looked everywhere and still can’t find the source, hire a pro, because you may have mold in your walls.

The Waterloo, IL homeowners’ guide to mold testing and remediation services

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