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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%
8 neighbors recently requested a quote
Avatar for Dry Source LLC
Dry Source LLC
4.6(
25
)
Indoor Air Quality TestingMold & Toxic Material TestToxicity and Mold - Removal

Serving Beloit, WI and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"I had a pipe burst in my home and ended up with quite a bit of water damage. The water removal team at Dry Source did an excellent job from start to finish. They responded quickly, were professional, and worked hard to get the water cleaned up and everything dried out properly. They kept me informed throughout the process about possible mold and what I can do in future and made a stressful situation much easier to deal with. I really appreciate their hard work, attention to detail, and the care they showed in my home."
Microbial growth
Jefferson ACM Abatement
Jefferson ACM Abatement
Madison Medical Equipment
Madison Medical Equipment

+1

Recommended by66%of homeowners
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
5.0(
2
)
Indoor Air Quality TestingMold & Toxic Material Test

Serving Beloit, WI and surrounding areas

Approved

Free estimates

Small jobs welcome

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.

AI image of Chris
Roof Inspection
Late 2025 HI
5 neighbors recently requested a quote
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 had a major water leak at one of my rentals. Honestly, if it was not for WI-MOLD Tom Neal and Brandon I dont know what I would of done. They guided me through the entire process. I am highly allergic to mold and I had it everywhere. Neal was so knowledgeable of it he got it tested ,removed, and retested when done. His crew did the remodeling They did insulation, drywall, painting, floors kitchen and bath. Just look at the photos . Its amazing . Hire them for any project honest trustworthy straight forward no bs. Good people whom understand water damage mold and insurance work. Jen Mi"
WI-Mold
WI-Mold
WI-Mold
WI-Mold
WI-Mold

+9

Response time7 hrs
Recommended by80%of homeowners
Showing 1-10 of 23
Mold Testing and Remediation FAQs, answered by experts

Black mold appears in areas with constant moisture and has a slightly fuzzy texture. It’ll have a primarily circular pattern. While it’s known to have a black color, it can also appear dark green, or dark brown, although a few types include orange or white flecks. Identifying black mold is important because people who inhale the spores could suffer respiratory issues or neurological problems. Black mold is a toxic material and requires a professional to remove it.

Mold is very likely if you do not take action to fully dry your home within around 24 to 48 hours after water damage occurs. This can happen even faster in warm, dark locations with extensive water damage. In areas of the home that receive ample sunlight and only have slight moisture issues, it can take weeks for mold to appear.

Since most mushrooms are beneficial for your grass, and otherwise harmless, it’s not a good idea to kill them with fungicide. If you suspect you have a poisonous type of mushroom in your grass, you should consult a professional concerning mitigation. There are lots of types of mushrooms and most are perfectly safe.

Mold can grow on garage ceiling insulation, which is why it’s important to install a vapor barrier behind the insulation and keep the space cooled and heated as you would your living area. Doing so will more or less eliminate the risk of mold growing on your garage ceiling insulation. You can also install a self-draining dehumidifier to help remove moisture, or opt for a foam board insulation or spray foam insulation that won’t harbor moisture and mold.

Yes, mold can easily grow under your hardwood floors, especially if your house has recently flooded or if there is a leak from a pipe under the floor. Hardwood floors can trap moisture beneath them, creating the perfect environment for mold to grow. Similarly, mold can also grow under your wood floor’s surface paint.

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

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