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TRUSTED BY CONCORD, CA HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon26
    Verified mold testing and remediation services reviews

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

Avatar for Mold Test Company Central CA
Mold Test Company Central CA
4.0(
90
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Concord, CA and surrounding areas

Approved

In business since 2015

Emergency services offered

Small jobs welcome

"This was not the first time using an Air Quality inspection company. They were help full, accessible, timely, accurate, and provided an analysis report that included a representative to review and answer questions. They also provided a referral to a remediation company that approached the issue in an efficient and cost effective manner."
Attic Ceiling
Drywall
Drywall
Insulation
Insulation

+66

Response time10 hrs
135 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Greenshield Solutions Remodeling Inc.
Greenshield Solutions Remodeling Inc.
4.5(
11
)
Toxicity and Mold - RemovalMold & Toxic Material Test

Serving Concord, CA and surrounding areas

Approved

In business since 2025

Free estimates

Small jobs welcome

"Brando came out and did great job estimating the job needed to be done then completed the work with great accuracy and care for the customer. I would highly recommend him for the work and care he had for my home."
Sewage Extraction
Sewage Extraction
After Photo
After Photo
Before Photo

+9

1 neighbors recently requested a quote
Recommended by44%of homeowners
Avatar for Isaacs Forensic Laboratories
Isaacs Forensic Laboratories
5.0(
5
)
Mold & Toxic Material TestMold & Toxic Material Test - For Business

Serving Concord, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

You can't manage everything that happens around your property, but you can keep your work environment safe for all employees and customers. \n \nHave peace of mind knowing that your property has clean indoor air quality and complies with structural safety standards set by the industry. Hire Isaac's Forensic Laboratories to get rid of dangerous elements that may be present in your home. We provide comprehensive environmental consulting services in Rio Vista, Fairfield, Stockton, CA and around the Bay Area. From asbestos and mold to radon and lead, we can check your building for a variety of volatile organic compounds and hidden dangers.

Photos
Mold Inspection
Mold Abatement
Asbestos Testing
Asbestos Removal

+1

Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Concord, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We decided to remodel our outdated bathroom, and McCormick Home Builders was a fantastic choice. Khaled and the team delivered high-quality work within the timeline and our budget. Every detail, from the tile work to the lighting, was beautifully done. They communicated well throughout, keeping us informed at every step, and the end result was truly a spa-like bathroom we can enjoy daily. We’d love to work with them again!"
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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Quality Air Environmental Consulting, LLC
Quality Air Environmental Consulting, LLC
4.9(
10
)
Mold & Toxic Material Test - For Business

Serving Concord, CA and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quality work

"Brad immediately called me back and was able to schedule an appointment within a few days. He was very knowledgeable about the potential of lead contamination in our old house. Great customer service and was very clean. I highly recommend!"
Asbestos Testing in skyscraper
Private Residence Floor Survey
Response time1 day
Recommended by100%of homeowners
Avatar for Ovation Restoration, LLC
Ovation Restoration, LLC
4.2(
102
)
Dry-rot, Water or Pest Damage - Major Repair

Serving Concord, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"We hired Ovation Restoration for a major home remodel, including adding a bathroom to the main floor, renovating three bathrooms, and installing a picture window in the family room. From start to finish, Ovation exceeded expectations with a clear, well-thought-out proposal, reasonable costs, and exceptional quality. The team, led by Juan and Chad, was professional, meticulous, and detail-oriented. Jessica ensured flawless material selection, ordering, and delivery with superb planning. Rick, the owner, provided excellent communication, accessibility, accountability, and flexibility, which made the process stress-free. The results were stunning and beyond our expectations. We’ve already recommended Ovation to friends—one has even signed a contract! We highly recommend Rick and the Ovation team for any remodeling project."
Breathtaking solid slab granite countertops
Walk-in shower with sliding glass door
Handicap accessible with style
New lighting
Antique white custom cabinets

+133

Response time10 hrs
Response rate96%
1 neighbors recently requested a quote
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Mold Testing and Remediation FAQs, answered by experts

Yes, drywall mud can get moldy—though the presence of moisture is required for this to happen. That’s why the best way to keep your powdered drywall mud fresh for as long as possible is to keep it in dry storage conditions. If you live in a humid area, it might not make sense to stockpile a lot of powdered drywall mud before you’re ready to use it. As for premixed drywall mud, avoid opening the container until you’re ready to use it—and don’t expect it to last longer than six months.

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.

Sewer gas in any location can cause eye and respiratory irritation if you’re exposed at low levels, or more severe symptoms if you’re exposed at high levels—but fortunately, the fresh air outside means it’s less likely to affect your physical health. However, sewer smells outside can still indicate significant plumbing problems that will need to be dealt with, such as a potentially damaged sewer line or roof vent pipe.

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.

Musty smells often indicate the presence of mold, which can lead to various health risks. Inhalation of mold spores may trigger allergic reactions, causing sneezing, a runny or stuffy nose, and itchy or watery eyes. People who suffer from mold allergies or asthma may experience more severe respiratory problems. Certain types of mold, like black mold, can lead to mycotoxicosis, a condition associated with serious health effects like respiratory problems, fatigue, headaches, and skin irritation if exposure continues for an extended period. Those with weakened immune systems, respiratory problems, or allergies may be more vulnerable to the health risks that come with musty smells. Therefore, it is crucial to address and eliminate the source of the odor promptly.

The Concord, 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.