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Find Mold & toxic material testers in O Fallon

Avatar for Mold One Missouri
Mold One Missouri
4.9(
18
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"Mike at Mold One was incredibly helpful. He gave me great information and lined up an appointment quickly for mold remediation. My wife has struggled literally her entire life with being sick and unwell and having chronic headaches and fatigue and poor sleep and mood swings and food allergies and the list goes on. We've been to countless doctors, bought countless supplements, tried several diets, done allergy testing, been to chiropractors, done hormone replacement therapy, etc. We recently found mold in our home and began looking into mold as a possible cause for her poor health. All of a sudden, things started lining up. Mold sickness symptoms are myriad, so nearly any symptoms could fit under mold sickness as a possible cause. We did a TON of research, found Mold One, did more research on their paracetic acid dry fog technique and found research articles from 3rd party labs supporting the effectiveness as well as safety of the procedure. My wife was pregnant at the time of treatment, so we wanted to be 100% sure that the treatment would be safe for her and for our baby and other young children. Once we were satisfied with the safety of the process, we hired Mold One and they had us lined up within the week. We only had to be out of our home for about 5 hours for the process. Upon returning, there was a faint vinegar smell in the house. My wife slept better that night than she ever had, and within 2 days, she was feeling SO MUCH BETTER. In fact, over the coming days/weeks, even though she was 8 months pregnant, she felt better then that she or I ever remember her being. She had energy, her mood was better, she slept better and needed less sleep. This was truly miraculous. We had tested the house for mycotoxins through Mycometrics prior to hiring mold one and found very high levels of Aspergillus. About a month after the mold treatment, my wife did a urinalysis through Great Plains Lab for mycotoxins and she was off the charts for Aspergillus. The body can take up to several years of detox to get all that out of the system, so no surprise that a month later it wasn't all gone. This was just proof that that mycotoxin was present at very high levels in her body as well as our home. And here's another shout out to the customer service and generosity of Mike and Mold One. About 2 months after the mold treatment, I was working on replacing my roof. A micro-storm came out of nowhere while I had the roof open and absolutely SOAKED everything. We had water dripping through the light fixtures inside and huge water spots showing all over our ceilings. This was hugely discouraging. After the storm passed, I called Mike and explained the whole thing and asked his advice since now we're a pitri dish for mold. Mike offered to send his guys back out to re-treat our home for free and consider it covered by warranty, even though it would have been easy and obvious to consider this new water damage not covered by warranty. I can't say enough of how great Mold One and Mike have been, and what a life changing impact their mold treatment of our home has had on my wife. Thank God that he led us to this solution for my family's health."
Total Home sterilization
bedroom
bathroom drains
moisture intrusion
black mold

+4

Response time11 hrs
Response rate96%
129 neighbors recently requested a quote
Avatar for The Mold Consultant
The Mold Consultant
4.9(
22
)

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%
2 neighbors recently requested a quote
Avatar for Mold Test Company IL
Mold Test Company IL
4.1(
89
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 2008

Emergency services offered

Small jobs welcome

"Our technician, David was fabulous. I have changed my review because Jeremiah was able to make things right. The company definitely stood behind their work and I would highly recommend Mold Test Company for residential or business if you are having issues with mold. Thanks Jeremiah for everything"
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection
Mold Inspection

+78

Response time1 day
262 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Mold Test Company MO
Mold Test Company MO
4.2(
67
)

Serving O Fallon, 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

14 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Quacker's Waterproofing & Basement Repair, LLC
Quacker's Waterproofing & Basement Repair, LLC
4.9(
135
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Quacker's Waterproofing was wonderful. When they came for the estimate, they were fast and no nonsense. They weren't trying to convince me of things that needed doing or dramatizing the work for more money. When I had questions about the work, they didn't make me feel dumb but took extra time out of their day so that I had peace of mind with my foundation. I hope to never need their help again, but I will definitely call them if I do. Special kudos to Rob!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+1

4 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Voda Cleaning & Restoration of St. Louis
Voda Cleaning & Restoration of St. Louis
5.0(
7
)

Serving O Fallon, MO and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Your Cleaning & Restoration Sidekick. At Voda, our mission is to make life easier for those responsible for creating inviting, healthy spaces where people live, work, and do business. We specialize in a wide range of cleaning & restoration services to keep your home or business clean, fresh and free from damage including: carpet cleaning, floor cleaning, tile & grout cleaning, upholstery cleaning, odor removal, water damage restoration, storm damage restoration, mold mitigation and more!

Carpet Cleaning
Post Carpet Cleaning
Pre Carpet Cleaning
Grease Fire
Stained

+5

Response time3 hrs
42 neighbors recently requested a quote
Recommended by42%of homeowners
Avatar for MOLD SOLUTIONS
MOLD SOLUTIONS
4.9(
97
)

Serving O Fallon, MO and surrounding areas

In business since 2006

Free estimates

Warranties offered

"Rich was a good listener when he came to see what we were concerned about. We already had been tested for mold. He wrote up a proposal. Alan was the person who came after that, to work and to supervise the jobs. The company was always responsive to all our questions, and Alan was reachable by email when something came up that we needed to coordinate schedules, etc. After the mold remediation, we hired Mold Solutions to prepare for a new floor so that toxins would be not only HEPA vacuumed but also under negative pressure to protect the inside. We had been satisfied the first time around, so we used Mold Solutions for two more projects. Alan consistently lowered our anxiety, and even now I feel I could call and ask him something about it and he would be helpful. In modern terms, the opposite of a robot."
Recommended by97%of homeowners
Avatar for Rapid Dry
Rapid Dry
4.8(
122
)

Serving O Fallon, MO and surrounding areas

In business since 2013

Free estimates

Emergency services offered

"Grant was very helpful and told me the small patch of mold I had was not dangerous and could be treated with bleach and Dawn dish detergent. He also told me about a paint to use to keep it from coming back. The outside mold could also be easily handled. Grant eased my anxiety about the mold in my house. I would definitely refer this company."
Recommended by95%of homeowners
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FAQs for mold & toxic material test projects in O Fallon, 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 O Fallon, 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.