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TRUSTED BY COMO, WI HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon14
    Verified mold testing and remediation services reviews

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

Avatar for Gardner Services
Gardner Services
4.7(
17
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business+2 more

Serving Como, WI and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"This is a high quality mold/fungi/fungus testing company, with excellent customer service and follow-up. The phones were picked up on the first call each time, and arranging for an appointment was very easy. They arrived on time, were efficient, informing, and friendly in their work, and brought commercial equipment to perform the test samples. The follow up phone call and email on the test results was good, and they provided a potential remediation plan for us to follow on the test results. The third party lab utilized by them had easy to understand numbers, graphs, and descriptions of what was tested. We will do business with Gardner Services again in the near future, and will recommend them to others."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+18

Response time7 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for Skeleton Key, LLC
Skeleton Key, LLC
4.9(
158
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Como, WI and surrounding areas

Approved

In business since 2016

Emergency services offered

Warranties offered

"He is very informative, thorough, helpful, professional, kind and totally understood why I needed this inspection and testing due to my husbands health as well as doing everything he possibly could to have the results to to take to my husband's pulmonologist appointment. I am very grateful to him for explaining so much to me in a manner that I understood as well as his recommendations, showing me examples and with thorough descriptions all without being forceful as what I must do. I am now waiting for the test results. As I could not be happier with professional I Highly recommend."
Metal Roof & 3 Chimneys
Response time2 hrs
Response rate88%
1 neighbors recently requested a quote
Avatar for Mold Test Company WI
Mold Test Company WI
4.0(
68
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Como, WI and surrounding areas

Approved

In business since 2018

Emergency services offered

Small jobs welcome

"Jeff did our mold testing and was extremely thorough. He took the time to sit down and talk with us, interview and explain everything. He made follow up calls to make sure our apartment complex was doing what needed to be done (which they weren't). He is caring and concerned. I would recommend him to everyone. Thank you Jeff and God bless you Carol Giusti Catherine Oels"
Drywall
Drywall
Drywall
Insulation
Insulation

+69

Response time1 day
49 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Elite Indoor Air
Elite Indoor Air
4.9(
34
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Como, WI and surrounding areas

Approved

In business since 2020

Warranties offered

Small jobs welcome

"I can't say enough how wonderful Damian is and all the help he provided me. He is very patient and has a heart of gold. He provided a demo for me to use while I was undergoing water damage. He explained how the air testing works and his air quality machine is amazing. He went above and beyond to accommodate me, providing his vendors to help assist me in my remodeling process. He has just been amazing in this whole process. There simply isn't enough good people who care for their customers like he does. There needs to be more Damian's around. Thank you so much for your guidance and support you provided me. I am so grateful that Angi provided me your business. You are simply a great person who shows compassion in all you do."
Digital test
Air quality digital test before
Digital test after active pure treatment
Air quality test
Windo seal

+15

Response time8 hrs
Response rate97%
80 neighbors recently requested a quote
Avatar for Emerald Build Group
Emerald Build Group
5.0(
7
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business+2 more

Serving Como, WI and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"I had an excellent experience working with this company for my basement and master bedroom renovations. Their team was professional, reliable, and highly skilled. The basement was transformed into a functional and modern space, while the master bedroom now feels like a luxurious retreat. They completed the work on time and within budget, paying attention to every detail to ensure the results exceeded my expectations. The communication throughout the process was clear and consistent, making the entire experience stress-free. I highly recommend them for anyone looking for top-quality construction and remodeling services!"
After Photos Condo
After Photos Condo
After Photos Condo
After Photos Condo
After Photos Condo

+68

Response time2 hrs
Response rate100%
1 neighbors recently requested a quote
Avatar for Bone Dry LLC
Bone Dry LLC
4.8(
45
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business+2 more

Serving Como, WI and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Todd is extremely knowledgeable and thorough, reveals defects in remarkable detail yet without undue emphasis over the gravity or urgency to remediate those that do not warrant it, and has a winning personality that one might suppose might even qualify him for his own TV show on home inspections."
Bathroom Mold
Basement Mold Restoration
Basement Mold Restoration
Basement Mold Restoration
Basement Mold Restoration

+2

Response time7 hrs
4 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for DJK Environmental, LLC
DJK Environmental, LLC
4.0(
28
)
Toxicity and Mold - RemovalToxicity and Mold - Removal - For Business

Serving Como, WI and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Every cent spent for this project went to the right company, DJK. The communication and guidance from beginning to end was superb, especially thanks to Brian (on-site consultant) and Vanessa (project coordinator). Should I ever find myself back in an asbestos concern, DJK will be my first and only call."
5 neighbors recently requested a quote
Recommended by78%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Mildew and mold are not different—mildew is a specific type of mold and yes, it can become dangerous if left untreated. It would be amazing if we were all biochemists but because we most likely aren’t, it isn’t wise to assume any mold is mildew on sight alone. Harmless mold and toxigenic mold (which can be deadly) look very similar, so if you see any new mold that looks even a little suspect, call a mold professional immediately.

Toxic mold doesn't have a specific color; instead, toxicity depends on the type of mold and the mycotoxins it produces. Stachybotrys chartarum (also known as black mold) is notorious for its potential toxicity. However, not all molds appearing black are Stachybotrys chartarum. Mold species that appear in various colors, such as green, gray, brown, or black, can also produce mycotoxins. Therefore, it's essential to focus on identifying the type of mold through professional testing rather than relying solely on color to determine its toxicity.

If you're wondering about black stains on brick at your home, the answer is that you're not looking at efflorescence. While efflorescence can be darker when certain types of salt are involved, black staining is caused by carbon staining, pollution from vehicles, and chimney soot. Black stains can also be caused by organic materials like lichen, algae, or mold.

In mild cases of mold growth, you can DIY mold remediation with a simple cleaning using safe and natural cleaning solutions like baking soda, hydrogen peroxide, vinegar, or lemon juice. However, if the mold is larger than 10 square feet or you suspect toxic black mold, you should not do mold remediation on your own. Instead, you should hire a professional mold removal company to handle the job.

Mold can begin to grow in as little as 12 to 24 hours, especially if the room is warm, so drying the area is the first thing you should do after water damage. Because mold and mildew can cause a range of health issues, make sure you clean up any water damage as soon as possible and run blower fans and dehumidifiers for 24 to 72 hours to dry out the room and reduce the risk of mold growth.

The Como, WI 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.