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Top-Rated Mold testing and remediation specialists in Beloit - 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 Beloit, WI and surrounding areas

Approved

In business since 1996

Free estimates

Emergency services offered

"David, at Gardner Environmental Services, professionally performed numerous air sample tests inside our home due to a minor smelling of mold in one spot.Fortunately, his lab resource came back with negative results on each location sample David tested. David was reassuring and pleasant to work with. I would recommend his company, to anyone."
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+18

Response time7 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for DJK Environmental, LLC
DJK Environmental, LLC
4.0(
28
)
Toxicity and Mold - RemovalToxicity and Mold - Removal - For Business

Serving Beloit, WI and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"We contacted this company based on the positive reviews. It seems as though that there aren't many companies who want to touch this type of work (so to speak). Or, if they do they are expensive. DJK wasn't much of an exception. They did respond rather quickly when I had first contacted them. They came out and inspected the suspected mold problem area in our bedroom. So finally about 3 weeks later, $1,330.00 and 2 hours of work AND for a 2' x 2' square hole cut out in our bedroom wall. And, they had sprayed a potent biocide chemical that hopefully killed our mold problem! They don't do any mold air quality testing at all. Hence, a lab is involved. DJK will come out in advance and use a moisture meter that is supposed to detect where the moisture sits. Then they zero in on the behind the walled suspect area. That problem was caused by another painting contractor who supposedly did caulk around our windows! Apparently not. Otherwise water wouldn't have seeped in and caused this issue. Oh well, another review and problem for another day. We think it's now gone. And we'll be happier for that part. They charge extra to repair the plaster wall with a drywall (NOT plaster). You'll have to hire someone else to do plaster repair if that is what you want. Don't forget about replacing the possibly contaminated wall insulation that they may take out and dispose of. Then figure either priming and painting it yourself after the plaster has cured. Or, hiring yet another darned contractor. In short, I think DJK does the job ok, but they ain't cheap. We will see."
5 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Property Services & Inspections, LLC
Property Services & Inspections, LLC
New to Angi
Indoor Air Quality TestingMold & Toxic Material Test

Serving Beloit, WI and surrounding areas

Approved

Free estimates

Credit card accepted

Property Services & Inspections, LLC is Wisconsin's trusted source for professional home inspection and environmental testing services. We help homeowners, buyers, sellers, and real estate professionals make informed decisions with thorough, unbiased inspections and accurate reporting.\n\nOur services include complete home inspections, indoor air quality testing, mold testing and radon gas testing. We use industry-standard methods and advanced equipment to identify potential issues affecting your properties safety, health, and value.\n\nAt Property Services & Inspections, LLC, we are committed to honesty, attention to detail, and exceptional customer service. Whether you're purchasing a new home, preparing to sell, or addressing concerns about air quality, mold, or radon, we provide the information and solutions you need for peace of mind.\n\nProudly serving southeastern Wisconsin and surrounding communities with reliable inspections and environmental services you can trust.

Avatar for Healthy Home Mold Services Inc
Healthy Home Mold Services Inc
5.0(
6
)
Indoor Air Quality TestingMold & Toxic Material TestMold & Toxic Material Test - For Business+2 more

Serving Beloit, WI and surrounding areas

In business since 2008

Emergency services offered

Warranties offered

"Fantastic! Highly recommended Tony and the team. Had a home inspection uncover basement "mold" issue. Had quote which seemed very high and included work that seemed unnecessary from another vendor for ~$3K. Healthy Home came out and quickly concluded there was NO mold but did offer to do a test for $250-$300 that would confirm this (if needed) or for peace of mind. They admitted the test would confirm what they were saying- mold was not present on the fiberglass insulation under the plastic. it was simply dirt and replacing the dirty insulation would take care of the black appearance. There was no danger and no mold. TONY you are fantastic, honest and dependable and you saved a senior citizen from spending $3K unnecessarily. It's great to see there are still dependable honest vendors out there! Call them for a FAIR and HONEST bid on your work."
Recommended by80%of homeowners
Avatar for WI MAIDS
WI MAIDS
4.5(
11
)
Indoor Air Quality TestingMold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Beloit, WI and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"I needed someone to test for mold as I had been diagnosed with a pulmonary mold disorder. When they arrived they immediately showed expertise in these matters and were concerned about my overall health and the state of my home. As it turns out one of my biggest issues was dust. To get better and be in remission so to speak the dust has to be reduced in my home first. They stated it would not pass a mold test right now there was no need to test and I needed a special cleaning. If I had the money I would have used them. I ended up getting some family together to get the job done as the price was out of my budget. However, if you have a mold or allergy issue, or any water damage at all I would not hesitate to call this company they care about you, your home, and your health. Thank You, Brandon and Tom."
WI-Mold
WI-Mold
WI-Mold
WI-Mold
WI-Mold

+9

Response time7 hrs
Recommended by80%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Pressure-treated wood offers some protection from the elements but doesn’t protect against mold. However, if you spot mold growing on pressure-treated wood, it doesn’t indicate rot or an interior fungal infection—the treatment process ensures that the mold stays on the exterior. Keep the wood dry, but if you spot some mold, remove it immediately and clean the area.

Some of the most common signs of sensitivity or illness from mold include congestion, eye irritation, difficulty breathing, and headaches. These symptoms may not lead to long-term health issues. However, some types of mold, like toxic black mold, can make you quite ill. You may experience respiratory issues, skin rashes, or neurological issues after exposure because of the toxicity. Infants, people with compromised immune systems, and older adults can suffer the most severe reactions.

The easiest way to know if it’s a leak or evaporation that’s causing low water levels in your pool is by conducting the bucket test. However, you can also monitor the chemicals in your pool for signs of imbalances or conduct a visual inspection of the areas around your pool in search of excessive moisture or cracks.

Before you start removing mold, turn off the furnace. Clean away any visible mold from accessible areas using a mixture of water and mild detergent. Change air filters and check for moisture sources like leaks. If the problem persists or it's widespread, hire a local HVAC company for professional cleaning.

Toxic drywall has a sulfur smell, similar to rotten eggs or poop. It’s often a sign that the drywall mud is expired, there’s mold or mildew growth, or there’s a leak in your home. Drywall can also absorb moisture during storage, transportation, or installation, resulting in a distinct musty odor.

The Beloit, WI homeowners’ guide to mold testing and remediation services

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