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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon31
    Verified mold testing and remediation services reviews

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

Avatar for Illinois Mold Eradicator
Illinois Mold Eradicator
5.0(
51
)
Toxicity and Mold - Removal

Serving Markham, IL and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"I contacted them yesterday for Mold Remediation services. I would recommend reaching out to this company for this type of service. I spoke to the owner and he was kind enough to talk me through my problem over the phone. He was completely honest up front and told me how to solve this issue on my own without spending any money. The other 2 companies I called for this service wanted to charge me a large amount upfront and I would have ended up wasting a lot of money if I hadn’t spoke to the owner of Illinois Mold Eradicator. It’s hard to find honest people now a days, I would highly recommend anyone to use this company as their first choice!"
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+67

Response time8 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for Southside Mold Testing & Cleanouts
Southside Mold Testing & Cleanouts
4.9(
74
)
Mold & Toxic Material TestMold & Toxic Material Test - For BusinessToxicity and Mold - Removal+1 more

Serving Markham, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2005

Free estimates

Emergency services offered

"Brian with Southside mold and testing is one of the best companies I have ever experienced. Discovering mold in your home for us was very unsettling and scary. From the first phone call with Brian to the mold remedy completion, we received service excellence and piece of mind. Brian is very talented, knowledgeable and professional. He explained in detail the what, how and why about the project in its entirety. Even with the price being great, I am still not one to hire service without having at least two or three professional quotes and opinions but this Company and Brian made it apparent to look no further. Thank you Southside Mold and testing and THANK YOU BRIAN!!"
Response time7 hrs
Response rate95%
Recommended by81%of homeowners
Avatar for Rapid Mold Services, LLC
Rapid Mold Services, LLC
4.8(
27
)
Indoor Air Quality TestingMold & Toxic Material Test

Serving Markham, IL and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

"Rapid mold services and Augustin were absolutely amazing!!! We had extensive mold in our kitchen and they worked endlessly to remediate it all while keeping costs as low as possible. They worked in a timely manner, kept us up to date and educated through everything they did, and had excellent communication. I would recommend them time and time again!"
Kitchen sealed off
Sink
Downtown Chicago
Downtown Chicago
Downtown Chicago

+2

Recommended by68%of homeowners
Avatar for MOLD REMOVAL & SOLUTIONS LLC
MOLD REMOVAL & SOLUTIONS LLC
5.0(
17
)
Toxicity and Mold - RemovalIndoor Air Quality TestingMold & Toxic Material Test+1 more

Serving Markham, IL and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Emergency services offered

Warranties offered

"We have a cold room for adhesive storage and had a horrible case of mold due to an incorrect build out. I called these guys and they came out very quickly. They removed all of the mold along with infested ceiling tiles and paint the fell off of the wall during the process. They left the walls looking new again and cleaned their mess. We have not had a mold issue since. I highly recommend these professionals!"
Response time3 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for GCPRO
GCPRO
4.7(
15
)
Toxicity and Mold - RemovalDry-rot, Water or Pest Damage - Major Repair

Serving Markham, IL and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"The HVAC unit in the condo above us leaked and caused extensive water damage in one of our bedrooms. The GCPRO Team came out and took care of everything! Their skill and professionalism really helped us dial down our anxiety over the entire situation! The attached picture: "No more moisture thumbs up!" We *highly* recommence GCPRO! ."
Helen Berkun – The Entire Facade Of The House
Green Oaks Apartments 🚧Reconstruction🚧 in Palos Hills
Helen Berkun – Bathroom Reveal
🚧Transforming🚧 spaces into modern and elegant interiors in St. Charles
Reconstruction After Water Damage on Montana Street, Chicago

+344

Response time11 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for HydroForce Cleaning Systems
HydroForce Cleaning Systems
4.5(
17
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Markham, IL and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"They came, they saw, and they conquered! I had a sewer back-up in the utility room of my home, and had put kitty-litter to help absorb backup. Although it initially helped, it created its own mess when even more had to be put down because of additional backup. To be honest, wasn't sure if HydroForce was up to the task, especially when they had to finish up on another day. But, HydroForce proved not only to be up to the task. but did an awesome job! They cleared, cleaned, and disinfected the floor and the surrounding appliances to the point they would be affected by the back-up. The only thing I did expect that wasn't done was the use of an air scrubber or purifier because of mold/mildew concerns with water backup. However, the job they did was impressive and I will recommend them for future use."
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+12

1 neighbors recently requested a quote
Recommended by100%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

While fiberglass dust is not generally considered toxic, inhaling the fibers can cause irritation to the respiratory system, eyes, and skin. Short-term exposure may lead to temporary discomfort, including coughing, throat irritation, and shortness of breath. However, prolonged or chronic exposure can result in more severe respiratory problems. Unlike asbestos, fiberglass is not associated with life-threatening illnesses. To minimize health risks when working with fiberglass materials, it is essential to use proper safety measures, such as wearing protective equipment like masks and goggles.

Frequently, fungi have a gray color with a powdery or fuzzy texture on a wall. In showers, fungi and mildew may resemble a pink slime. Meanwhile, toxic mold may resemble a fuzzy growth on walls that’s often black or green in color. Some toxic black mold will have specks of orange or white on it. However, not all dark-colored mold you find on a wall is toxic. An infestation of toxic mold often will spread faster than fungi on walls. If you are unsure whether you have toxic mold, reach out to a professional for help.

Most of the health problems associated with exposure to fiberglass insulation are short-term in nature. You may suffer from minor and temporary skin or eye irritation if you come into contact with it, and you may experience some sneezing, coughing, or breathing issues if you inhale fiberglass. Those with asthma and allergies may suffer more and longer. Though fiberglass was once a suspected carcinogen, there’s now no good evidence that exposure to fiberglass can cause lung cancer.

Costs depend on property size, test types, and additional services like mold sampling.

A stain from a water leak will usually be brown and concentrated in a single area where the water is originating from. You may find it under a damaged section of roof, under an upstairs bathroom, or beneath your HVAC system. Stains from condensation are more likely to be widespread since they don’t come from a single point of water intrusion. Condensation stains also look blotchy and may smell musty, and they won’t be concentrated in a single area on your ceiling.

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

From average costs to expert advice, get all the answers you need to get your job done.