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Find Mold & toxic material testers in San Francisco

Avatar for Moisture & Restoration Consultants, LLC
Moisture & Restoration Consultants, LLC
4.8(
59
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

Approved

In business since 1994

Emergency services offered

Warranties offered

"Mr. Osborn was very prompt in inspecting our water intrusion problems and testing for mold. We received the results of the testing within a short time and he made specific recommendations for correcting all of our issues. We appreciate his help very much."
Mold Remediation Project
Master Bathroom
Master Bathroom
Hall Bathroom
Hall Bathroom

+27

Response time4 hrs
9 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Mold Test Company Central CA
Mold Test Company Central CA
4.0(
89
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

Approved

In business since 2015

Emergency services offered

Small jobs welcome

"The inspector was professional and thorough. The report was timely and the company's representative called me to explain the results of the test. I've emailed him to request clarifications and am awaiting his reply. The only negative thing is that after our telephone conversation he transferred me to a 3rd party company who markets mold removal services. The rep there tried to sell me his product. I didn't buy it yet."
Attic Ceiling
Drywall
Drywall
Insulation
Insulation

+66

Response time10 hrs
177 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Bio 911
Bio 911
4.9(
92
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Easy and fast communication. Business owner came out quickly per our request, and tested the air quality in an around our home, and did mold testing. He was speedy and kind; very informative of what he was doing and what he would be looking for. Gave us his thoughts and recommendations on what we saw visually, and then put the tests in to the laboratory same day. Results came back within 3 days. I highly recommend them for your mold and air testing needs!"
Mold under window
mold on concrete foundation
after treatment
after remediation
Hoarding cleanup

+18

Response time5 hrs
Response rate98%
1 neighbors recently requested a quote
Avatar for Environmental Science Services
Environmental Science Services
4.5(
42
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

"Shane is very professional. I hired ESS because they offered indoor air quality tests for asbestos in addition to bulk sample tests. I also had an airborne mold test since they traveled to Santa Rosa, and the report was very thorough and tested for 27 types of mold spores including Stachybotrys (toxic black mold). I would recommend ESS to a friend seeking this service."
interior
IAQ
Clandestine Laboratory Investigation
Wipe Testing for Asbestos
Water Intrusion Mold Testing

+3

Response time8 hrs
6 neighbors recently requested a quote
Recommended by97%of homeowners
AT Environmental Solutions
New to Angi
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

Approved

In business since 1989

Free estimates

Credit card accepted

AT Environmental Solutions, has a single mission, which is to achieve complete customer satisfaction! We strongly believe in giving our customers the most for their money. We work with only the highest quality materials and experienced professionals. With over 20 years of experience, we have consistently focused on the needs of our customers, providing personalized attention and a stress free experience. This approach has set us apart from our competition and keep our customers coming back! Give us a call today!

2 neighbors recently requested a quote
A1 Certified Environmental
4.6(
422
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

In business since 2003

Credit card accepted

"I looked around for mold testing help for a few days; I threw all of my belongings out according to recommendations online. When Carl arrived, he put my worries to rest and I am so very glad I will have the right test in hand in just a few days. I feel like a huge weight is off of my shoulders. Praise God! -Jill"
Visible signs under sink
Damp crawlspace
Peeling paint (ceiling)
Air sampling
Response time3 hrs
Recommended by92%of homeowners
Avatar for Bay Area Mold Pros
Bay Area Mold Pros
4.6(
10
)
Mold & Toxic Material Test

Serving San Francisco, CA and surrounding areas

In business since 2017

Free estimates

Credit card accepted

"Rick was pretty knowledgeable about mold and the process that creates it and how it should be treated. Took no more than about 30 minutes and he answered all my questions thoroughly. Really appreciate the help."
Response time4 hrs
Recommended by100%of homeowners
Showing 1-10 of 49
FAQs for mold & toxic material test projects in San Francisco, CA

Some companies offer a no‑cost phone or video consultation that screens for red flags. If the discussion points to a real issue, the pro will recommend a paid on‑site inspection. The complimentary call clarifies whether you need full testing, but it isn’t a substitute for samples, lab work, or a written report. Always confirm what the free service covers before you schedule.

A standard inspection, which includes basic air and surface samples, takes an average of two hours. If the pro needs to probe hidden spaces, such as wall cavities or ductwork, plan on up to six hours. Extra time allows the inspector to reach tight areas, collect additional samples, and document findings. Lab analysis is a separate process and often adds several business days to the overall timeframe before you receive the full report.

Mold thrives where moisture lingers and air flow is poor. Common hotspots include bathroom walls, kitchen backsplashes, window sills, HVAC vents, fireplaces, crawl spaces, and enclosed attics. Check these areas regularly—especially after leaks or high‑humidity weather—to catch growth early and avoid costly repairs.

Unchecked mold can knock 20% to 37% off a home’s market value because buyers worry about hidden damage and health risks. Even after remediation, visible staining or a history of major moisture issues can still lower offers and prolong the time on the market. Addressing mold quickly protects both your property’s structural integrity and its resale appeal.

The San Francisco, CA homeowners’ guide to mold & toxic material tests

From average costs to expert advice, get all the answers you need to get your job done.