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Find Mold & toxic material testers in San Jose

Avatar for Mold Test Company Central CA
Mold Test Company Central CA
4.5(
73
)

Serving San Jose, 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
264 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Certified-Environmental
Certified-Environmental
4.8(
25
)

Serving San Jose, CA and surrounding areas

Approved

In business since 1990

Free estimates

Offers commercial services

"Richard Gray and his daughter Jayce, also a certified environmentalist, were punctual for our appointment and very thorough with sample testing and air quality testing. They were very patient in explaining their process and answered all my questions without hesitation. I would highly recommend them to anyone seeking air quality testing and mold abatement."
Response time4 hrs
Recommended by96%of homeowners
Avatar for Mold Remedies
Mold Remedies
4.6(
21
)

Serving San Jose, CA and surrounding areas

Approved

In business since 2002

Credit card accepted

Customers say: Super punctual

"These guys were professional, knew exactly where the mold was coming from and how to remove it. They were timely and did a great job!"
Areas of concern
 Dry Rot
Polluted Air
Clean air
We can make it happen

+15

Response time2 days
1 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Environmental Science Services
Environmental Science Services
4.8(
35
)

Serving San Jose, 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
3 neighbors recently requested a quote
Recommended by97%of homeowners
Z-CON Specialty Services, Inc.
New to Angi

Serving San Jose, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction!

Avatar for American Air Testing Inc
American Air Testing Inc
4.8(
12
)

Serving San Jose, CA and surrounding areas

In business since 2001

Free estimates

Warranties offered

"I suspected the presence of mold in our first floor due to an allergic reaction and a previous leak in the area.  John Riera and his son came, took moisture readings and air samples.  In addition, John was able to troubleshoot and provide other possible causes/solutions to the allergies.  He produced a detailed report with good advice.  The service is pricier than other mold inspection companies, but I like that there is no potential conflict as he does not do remediation, and that his expertise extends to other chemical contaminants."
Recommended by83%of homeowners
Avatar for Environmental Mold Sampling LLC
Environmental Mold Sampling LLC
5.0(
4
)

Serving San Jose, CA and surrounding areas

In business since 2000

Free estimates

Warranties offered

We are an indoor environmental testing company with 15 years in the industry, we maintain an A+ rating with the better business bureau at all times, We do not perform mold abatement as it is a conflict of interest to perform both. We are ACAC certified, fully insured and we keep up with industry standards. We recommend only qualified licensed remediation companies to perform abatement. We are also Infra red certified level 1 We can infra red scan your entire home for hidden moisture, heat and air conditioning loss through openings and lack of insulation. We can also detect leaking or disconnected HVAC ducting in walls and ceilings.

Recommended by100%of homeowners
Avatar for Green Planet Mold & Restoration
Green Planet Mold & Restoration
5.0(
26
)

Serving San Jose, CA and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Great! We found Green Planet on Angie's List, and we were able to schedule an appointment right away. Nir and his team were fantastic - punctual, thorough, friendly, and know their stuff. Very detailed. I even texted Nir after 9pm one night with a question, and he called me right away. Top notch care during a not-so-pleasant situation of having mold."
Recommended by100%of homeowners
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FAQs for mold & toxic material test projects in San Jose, 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 Jose, 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.