Top-rated mold & toxic material testers.

Get matched with top mold & toxic material testers in West Covina, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Mold & toxic material testers in West Covina

Avatar for 911 Certified Mold Testing LLC
911 Certified Mold Testing LLC
5.0(
8
)

Serving West Covina, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"Kayla is so wonderful to work with. She is so professional and knows her stuff. Iâ ve used her in 2 projects already and my clients and I are extremely satisfied with her service. Her turn around mold air testing is fast. I will definitely recommend her and will continue to use her service."
Response time4 hrs
Response rate93%
Recommended by87%of homeowners
Request Quote
Avatar for Hippo Home Inspections
Hippo Home Inspections
4.9(
152
)

Serving West Covina, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Emergency services offered

Small jobs welcome

"They were knowledgeable and thorough about mold testing and removal"
Response time4 hrs
Response rate89%
147 neighbors recently requested a quote
Request Quote
Avatar for First Source Restoration, Inc.
First Source Restoration, Inc.
4.0(
41
)

Serving West Covina, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Karla did a good job detecting the mold behind my walls. I will be breaking my lease. I want to thank you for all your help."
Infrared light
got mold?
Equipment
mold removal
Plastic Containment

+9

Response time2 days
81 neighbors recently requested a quote
Recommended by88%of homeowners
Request Quote
Avatar for One Pro Restoration
One Pro Restoration
5.0(
3
)

Serving West Covina, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"The work went great. They were very fast and very professional. They did an excellent job on something we've needed done for years."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+7

Response time1 day
Response rate90%
6 neighbors recently requested a quote
Request Quote
Avatar for Bio Safe Air
Bio Safe Air
New to Angi

Serving West Covina, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

We take pride in delivering expert mold testing with accuracy, professionalism, and top-quality service. Our certified team is committed to identifying mold issues quickly and clearly, helping you protect your home or business with confidence.\n\nOur reputation is built on reliability, safety, and honest results—no matter the size of the job.\nNot sure if you have mold? We offer a free consultation to help you understand your situation and make the right decision before it becomes a bigger problem.

Mold behind walls
Mold inside home
23 neighbors recently requested a quote
Request Quote
Avatar for Socal Express Restoration and Construction Inc.
Socal Express Restoration and Construction Inc.
New to Angi

Serving West Covina, CA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

We are an ethical, honest and professional company. We are easy to communicate with. Always working with you until the job is done right and to your specifications. When working with our company you can expect integrity, prompt service and superior customer service. Always leaving the job site clean . We take pride in our services and enjoy making clients repeat clients. You can count on us to get the job done right the first time. We will meet with you at your convenience and will not keep you waiting. \n\nCall us today for your free estimate. You'll be pleased you did. Thank you

Response time2 days
Request Quote
...
Showing 1-10 of 113
FAQs for mold & toxic material test projects in West Covina, 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 West Covina, 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.

See all articles