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TRUSTED BY WALNUT, CA HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon18
    Verified mold testing and remediation services reviews

Find Mold testing and remediation specialists in Walnut

Avatar for Hippo Home Inspections

Hippo Home Inspections

4.90(
143
)
Approved Pro

Hippo Home Inspections

4.90(
143
)
Approved Pro
Customers say: True professional
5 years of experience
Emergency services offered

Hippo Home Inspections is the solution to all of your home inspection needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed, there will be no question on who to call.

"The inspector was on time, professional, knowledgeable and prepared a very precise report."

John H on December 2025

Hippo Home Inspections is the solution to all of your home inspection needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed, there will be no question on who to call.

"The inspector was on time, professional, knowledgeable and prepared a very precise report."

John H on December 2025


Avatar for All Clear Environmental Inc

All Clear Environmental Inc

4.91(
141
)
Approved Pro

All Clear Environmental Inc

4.91(
141
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
23 years of experience

All Clear Environmental is Southern California's one-stop solution for asbestos removal, lead abatement and mold remediation. Our team of licensed professionals has over 100 years of combined experience in the thorough, discrete and environmentally responsible removal of hazardous materials. If you think that your property may be at risk for containing asbestos, lead or mold, we can provide you with the most cost-effective solution. And you can be sure that when we're finished, it will be All Clear.

"Abatement and Remediation are not for the weak or weary - whether managing a personal or professional project, proper containment practices and efforts are essential. I will forever recommend and promote All Clear Environmental - a family-run business with hands-on customer relations. Larry Enos and his son, Beckett, put forth great effort to communicate, assess, and manage the process in good faith. All Clear's team of Rigo et al, handled the physical abatement and remediation, in our home. Rigo and his team made us feel 100% safe, confident, and secure throughout each stage - which was no easy feat with children and pets, in a home. And while there are no accolades for being second-round mold recipients, we hit the jackpot in working with All Clear. We have worked with other companies only to be left with poor communication, a tendency to be overcharged, and dishonesty. Beckett was available almost 24/7 to answer questions via text and live calls. When I felt doubt, Beckett made time to discuss alternative avenues and ensure our best interests were at the forefront of every decision. I recommend All Clear Environmental to friends, neighbors, and strangers with 6/5 stars. Your house is your home - and mold is personal. A company that recognizes the need to love your home well, is a gem beyond measure. Thank you, All Clear Environmental - good people attract good people! Gratefully, Jackie"

Jackie D on August 2024

All Clear Environmental is Southern California's one-stop solution for asbestos removal, lead abatement and mold remediation. Our team of licensed professionals has over 100 years of combined experience in the thorough, discrete and environmentally responsible removal of hazardous materials. If you think that your property may be at risk for containing asbestos, lead or mold, we can provide you with the most cost-effective solution. And you can be sure that when we're finished, it will be All Clear.

"Abatement and Remediation are not for the weak or weary - whether managing a personal or professional project, proper containment practices and efforts are essential. I will forever recommend and promote All Clear Environmental - a family-run business with hands-on customer relations. Larry Enos and his son, Beckett, put forth great effort to communicate, assess, and manage the process in good faith. All Clear's team of Rigo et al, handled the physical abatement and remediation, in our home. Rigo and his team made us feel 100% safe, confident, and secure throughout each stage - which was no easy feat with children and pets, in a home. And while there are no accolades for being second-round mold recipients, we hit the jackpot in working with All Clear. We have worked with other companies only to be left with poor communication, a tendency to be overcharged, and dishonesty. Beckett was available almost 24/7 to answer questions via text and live calls. When I felt doubt, Beckett made time to discuss alternative avenues and ensure our best interests were at the forefront of every decision. I recommend All Clear Environmental to friends, neighbors, and strangers with 6/5 stars. Your house is your home - and mold is personal. A company that recognizes the need to love your home well, is a gem beyond measure. Thank you, All Clear Environmental - good people attract good people! Gratefully, Jackie"

Jackie D on August 2024


Avatar for Pure Air Mold Testing

Pure Air Mold Testing

5.00(
13
)
Approved Pro

Pure Air Mold Testing

5.00(
13
)
Approved Pro
1 years of experience
Free onsite estimate

Pure Air Mold Testing is here to help! We offer professional mold testing services. We are based out of the Los Angeles, CA area. We provide mold inspections, air quality testing, and moisture assessments for homes and businesses. we use certified lab analysis and advanced equipment to detect mold accurately and identify hidden moisture issues. our team delivers fast, reliable results and clear explanations so you know exactly what's affecting your indoor environment. Whether your'e dealing with allergies, odors, or recent water damage, Pureair Mold Testing helps you create a cleaner, healthier space, with honest, high quality service you can trust.

"Excellent service and clear communication throughout the mold testing process. They were knowledgeable, efficient, and easy to work with."

Melvin L on December 2025

Pure Air Mold Testing is here to help! We offer professional mold testing services. We are based out of the Los Angeles, CA area. We provide mold inspections, air quality testing, and moisture assessments for homes and businesses. we use certified lab analysis and advanced equipment to detect mold accurately and identify hidden moisture issues. our team delivers fast, reliable results and clear explanations so you know exactly what's affecting your indoor environment. Whether your'e dealing with allergies, odors, or recent water damage, Pureair Mold Testing helps you create a cleaner, healthier space, with honest, high quality service you can trust.

"Excellent service and clear communication throughout the mold testing process. They were knowledgeable, efficient, and easy to work with."

Melvin L on December 2025


Avatar for Pure Restoration Inc

Pure Restoration Inc

4.95(
65
)
Approved Pro

Pure Restoration Inc

4.95(
65
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
25 years of experience

Quality Service You Can Count On! If you are experiencing water damage, mold or fire damage problems, or simply are just looking to remodel your kitchen or bathroom, Pure Restoration can help you! Our experts are highly knowledgeable with mold testing, structural restoration & remediation, including reconstruction for water damage or fire damage, water extraction and services. Pure can deal with virtually any project and takes pride in leaving our customers satisfied! We offer FREE inspections and estimates for your residential home or commercial property. With over 20 years of experience in the industry, Pure Restoration delivers advanced and reliable professional restoration services including mold inspections and testing throughout Los Angeles.

"Very pleased with the work they provided. Susan, the Administrative Assistant/Production Assistant helpful with all my concerns and questions. I’ve received many compliments on the completed project."

Roberta A on November 2025

Quality Service You Can Count On! If you are experiencing water damage, mold or fire damage problems, or simply are just looking to remodel your kitchen or bathroom, Pure Restoration can help you! Our experts are highly knowledgeable with mold testing, structural restoration & remediation, including reconstruction for water damage or fire damage, water extraction and services. Pure can deal with virtually any project and takes pride in leaving our customers satisfied! We offer FREE inspections and estimates for your residential home or commercial property. With over 20 years of experience in the industry, Pure Restoration delivers advanced and reliable professional restoration services including mold inspections and testing throughout Los Angeles.

"Very pleased with the work they provided. Susan, the Administrative Assistant/Production Assistant helpful with all my concerns and questions. I’ve received many compliments on the completed project."

Roberta A on November 2025


Avatar for 911 Certified Mold Testing LLC

911 Certified Mold Testing LLC

5.00(
8
)
Approved Pro

911 Certified Mold Testing LLC

5.00(
8
)
Approved Pro
Customers say: Quick response
31 years of experience
Free onsite estimate

Show that you Care and Test the Air! 911 Certified Mold Testing LLC has 30 years of experience. Don't risk your health, have the air tested. Certified and Qualified, Fast Results with Same Day Testing (if needed), Free Consultation and Evaluation. Fair and Reasonable Industry Pricing. Accredited Lab Results

"Very professional and knowledgeable"

Theodore T on March 2025

Show that you Care and Test the Air! 911 Certified Mold Testing LLC has 30 years of experience. Don't risk your health, have the air tested. Certified and Qualified, Fast Results with Same Day Testing (if needed), Free Consultation and Evaluation. Fair and Reasonable Industry Pricing. Accredited Lab Results

"Very professional and knowledgeable"

Theodore T on March 2025


Avatar for Pure Mold Masters

Pure Mold Masters

5.00(
7
)
Approved Pro

Pure Mold Masters

5.00(
7
)
Approved Pro
Super Service Award
Customers say: Quick response
15 years of experience
Free onsite estimate

Demolition-Free Mold Removal - FREE Inspections - Lab Certified Results. No Tear-outs- Your Mold Issue Resolved in 1 Day! We are Orange County?s premier solution for expert mold removal & air quality testing. With our unique process, your home or office will be mold-free, guaranteed! Pure Mold Masters, introduces revolutionary mold treatment using our patented Dry Fog cold sterilant technology. Unlike traditional methods, our process requires no demolitions and leaves zero residue, providing lasting protection from mold spores, bacteria, viruses, and odors on contact. We guarantee successful outcomes supported by air quality testing from a third-party lab, making the process less invasive, cost-effective, and timely, allowing for same-day occupancy. Over 50,000 spaces treated with our patented dry-fog EPA verified, non-toxic, child safe, pet safe and food safe treatment that leaves no residue and is completed in just a few hours. Call for Same Day Free Inspections!

"Not only did Matt and his crew do an excellent job but they went above and beyond their excellent service."

Jacques C on June 2025

Demolition-Free Mold Removal - FREE Inspections - Lab Certified Results. No Tear-outs- Your Mold Issue Resolved in 1 Day! We are Orange County?s premier solution for expert mold removal & air quality testing. With our unique process, your home or office will be mold-free, guaranteed! Pure Mold Masters, introduces revolutionary mold treatment using our patented Dry Fog cold sterilant technology. Unlike traditional methods, our process requires no demolitions and leaves zero residue, providing lasting protection from mold spores, bacteria, viruses, and odors on contact. We guarantee successful outcomes supported by air quality testing from a third-party lab, making the process less invasive, cost-effective, and timely, allowing for same-day occupancy. Over 50,000 spaces treated with our patented dry-fog EPA verified, non-toxic, child safe, pet safe and food safe treatment that leaves no residue and is completed in just a few hours. Call for Same Day Free Inspections!

"Not only did Matt and his crew do an excellent job but they went above and beyond their excellent service."

Jacques C on June 2025


Avatar for Envirotech Restoration

Envirotech Restoration

4.94(
8
)
Approved Pro

Envirotech Restoration

4.94(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

When interacting with Envirotech Restoration, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Very approachable and the work performed was top notch."

Zach L on June 2022

When interacting with Envirotech Restoration, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.

"Very approachable and the work performed was top notch."

Zach L on June 2022


Avatar for Mold Solutionz 24/7

Mold Solutionz 24/7

4.47(
29
)
Approved Pro

Mold Solutionz 24/7

4.47(
29
)
Approved Pro
Customers say: Quality work
31 years of experience
Free onsite estimate

With over 20 years of experience in the industry, we are the experts you need to take care of your home or business. We handle everything from removal to testing. We will treat your home as we would treat our own. Give Mold Solutionz 24/7 a call today. We look forward to working with you! We handle emergencies!

"Friendly servicer. However, had a bit of sticker shock with air sampling. Was told it was $160 per sample but it wasn?t clear until she finished that the total would be $320 (a control sample target sample). It would have been better to clearly quote the expected total. "

Christine N on February 2025

With over 20 years of experience in the industry, we are the experts you need to take care of your home or business. We handle everything from removal to testing. We will treat your home as we would treat our own. Give Mold Solutionz 24/7 a call today. We look forward to working with you! We handle emergencies!

"Friendly servicer. However, had a bit of sticker shock with air sampling. Was told it was $160 per sample but it wasn?t clear until she finished that the total would be $320 (a control sample target sample). It would have been better to clearly quote the expected total. "

Christine N on February 2025


Avatar for Mold Test Company NO CA

Mold Test Company NO CA

4.29(
95
)
Approved Pro

Mold Test Company NO CA

4.29(
95
)
Approved Pro
Customers say: Super punctual
8 years of experience
Emergency services offered

At Mold Test Company NOCA, we take great pride in the experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"- Great work, very happy with it "

Suha K on September 2025

At Mold Test Company NOCA, we take great pride in the experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship, and complete customer satisfaction from start to completion of a project. In order to understand the needs, and expectations of our customers, we take great care to work, and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"- Great work, very happy with it "

Suha K on September 2025


Avatar for First Source Restoration, Inc.

First Source Restoration, Inc.

4.22(
34
)
Approved Pro

First Source Restoration, Inc.

4.22(
34
)
Approved Pro
Customers say: True professional
20 years of experience
Free onsite estimate

It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, First Source Restoration takes great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Thank you for choosing First Source Restoration!

"Great service and quick turnaround!"

Flor F on October 2024

It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, First Source Restoration takes great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. Thank you for choosing First Source Restoration!

"Great service and quick turnaround!"

Flor F on October 2024

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Mold Testing and Remediation questions, answered by experts

If you suspect black mold is inside your walls, do not punch a hole in the drywall yourself to look. Call a mold inspection expert to help you. Some signs of a potential black mold infestation inside the wall include an unexplained musty, damp smell. Some people liken it to rotting vegetables. You may smell it most strongly through a wall outlet. If you and your family are experiencing constant coughing or symptoms that feel like an unexplained allergy, it could indicate black mold behind a wall.

Yes, a refrigerant leak is dangerous to breathe. Refrigerants can push oxygen out of a room, which can lead to suffocation, serious health issues, and even death. You may also suffer from refrigerant poisoning, which can cause swelling of the throat or sinuses, vision loss, a burning sensation in your eyes, ears, nose, lips, and tongue, and more. You should seek medical attention immediately if you experience any of these symptoms.

Frequently, fungi have a gray color with a powdery or fuzzy texture on a wall. In showers, fungi and mildew may resemble a pink slime. Meanwhile, toxic mold may resemble a fuzzy growth on walls that’s often black or green in color. Some toxic black mold will have specks of orange or white on it. However, not all dark-colored mold you find on a wall is toxic. An infestation of toxic mold often will spread faster than fungi on walls. If you are unsure whether you have toxic mold, reach out to a professional for help.

While home mold tests can provide a simple identification of mold presence, they lack accuracy and reliability. These kits may detect mold spores but can't pinpoint the source or identify the type. Professional testing, combined with an inspection, is more comprehensive and leads to actionable next steps. 

If high moisture levels have led to mold growth on your drywall, mold remediation may be your best bet. The average cost of mold remediation is $2,400 , but the total price depends on how much you need to repair and the location. Removing mold from drywall may cost you between $300 and $825 , but the overall price could be higher if you need to fully replace several walls in your home.

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.

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