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TRUSTED BY WALNUT, CA HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon19
    Verified mold testing and remediation services reviews

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

Avatar for Pure Restoration Inc
Pure Restoration Inc
4.4(
84
)
Toxicity and Mold - RemovalDry-rot, Water or Pest Damage - Major RepairToxicity and Mold - Removal - For Business

Serving Walnut, CA and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"From the first day we started dealing with Tamir and the team at Pure Restoration we knew we were going to have a good experience - because he LISTENED. Issues were discussed and laid out before they became actual problems and Tamir's experience helped us to avoid many simple mistakes that are often made by homeowners. All of the work was done professionally. Permits were pulled and inspections were passed. Tamir communicated all of our needs to his subcontractors and our insurance company, and all of the crew working in our home were responsible and had very positive attitudes. Tamir also communicated his needs (code issues, etc.) to us. Throughout the job we all collaborated with a designer whose ideas were embraced by Tamir and his team (which is pretty rare). Progress was made on the job every day - and the workplace was kept clean and protected. We have already referred Tamir to our friends, and, based on having just passed our last inspection, we will continue to do so. Our house looks great and we are very happy."
Mold Remediation
Mold Remediation
Mold Remediation
Mold Remediation
Mold Remediation

+96

Response time1 day
Response rate100%
9 neighbors recently requested a quote
Avatar for Mold Solutionz 24/7
Mold Solutionz 24/7
4.2(
35
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Walnut, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"All work was completed on time with exceptionally high-quality work. All workers were introduced to me, making me comfortable with strangers in my home. All workers wore masks and used all health recommendations. I was brought into every step of the process and the process was explained. The total cost was as estimated. The price was about half of the estimate of other contractors. I was very satisfied. I recommend this business."
demo
pic 2
Response time11 hrs
Response rate89%
Recommended by89%of homeowners
Avatar for 911 Certified Mold Testing LLC
911 Certified Mold Testing LLC
5.0(
8
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Walnut, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"A few months ago I used 911 certified mold testing for my home they were referred to me by my plumber. I had a great experience dealing with this company they were very professional and knowledgeable about mold testing. They were also reasonable in their pricing! I highly recommend using this company for mold testing."
Response time4 hrs
Response rate93%
1 neighbors recently requested a quote
Avatar for Night And Day Restoration LLC
Night And Day Restoration LLC
5.0(
5
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Walnut, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

Night & Day Restoration LLC specializes in water damage restoration and professional mold testing. Whether you're dealing with a leak, flooding, moisture concerns, or suspected mold, our team will assess the situation, explain what we find, and recommend the right next step.\nWe provide water extraction, structural drying, moisture detection, HEPA air filtration, mold air and surface testing, odor treatment, and structural cleaning. Our team is IICRC Water Restoration Technician (WRT) certified, and we pride ourselves on fast communication, detailed documentation, honest recommendations, and treating your home like it’s our own.\n

47 neighbors recently requested a quote
Avatar for First Source Restoration, Inc.
First Source Restoration, Inc.
4.0(
41
)
Mold & Toxic Material TestToxicity and Mold - RemovalIndoor Air Quality Testing+2 more

Serving Walnut, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"First Source did a great job with mold remediation after flood. Edi and his assistant went above and beyond what I was expecting. Price was in line with other bids. I hope I don’t have to but I would hire them again."
Infrared light
got mold?
Equipment
mold removal
Plastic Containment

+9

Response time3 days
77 neighbors recently requested a quote
Recommended by88%of homeowners
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Mold Testing and Remediation FAQs, answered by experts

Yes. You should use this product in a well-ventilated area because the fumes can be harmful. In addition, the product is poisonous if swallowed, so keep it out of reach of children. Wood finishing products that are oil based can cause irritation to your skin, so you should always wear gloves when handling it.

While bathroom mold, commonly known as black mold, does not produce harmful mycotoxins, it can still pose health risks. If disturbed, mold spores can become airborne and potentially cause allergic reactions, respiratory problems, skin irritations, and other health issues. This is especially true for individuals with allergies or sensitivities. While bathroom molds are not as dangerous as other mold species, prompt action is crucial to mitigate health risks and prevent further spread. 

Knowing what to expect during a mold inspection can help make the process easier. Prepare by closing doors and windows for 48 hours, turning off HVAC systems for at least two hours, and avoiding disinfectant chemicals for at least 48 hours. 

The mold inspection process takes between 24 and 48 hours. Your professional will check walls, fireplaces, air ducts, vents, and windows for visible spores. They will also take an outdoor base air sample. Your pro will send these samples to a lab for testing and advise you on the findings.

If you own a stereo microscope, you should be able to see the fibers. The stereo microscope often can perform magnification up to 50x. But unless you have experience viewing asbestos fibers, you may not know exactly what you are seeing. Some fibers are curly, while others are long and straight. Blue, brown, white, and gray colored fibers are all possible.

Professionals use specialized equipment and techniques to detect asbestos, radon, and VOCs.

The Walnut, CA 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.