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TRUSTED BY RIVERSIDE, CA HOMEOWNERS

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    Average homeowner rating
  • Verified reviews icon18
    Verified mold testing and remediation services reviews

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

Avatar for 911 Certified Mold Testing LLC
911 Certified Mold Testing LLC
5.0(
8
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business

Serving Riverside, CA and surrounding areas

Approved

In business since 1995

Free estimates

Emergency services offered

"A few months ago I used 911 certified mold testing for my home they were referred to me by my plumber. I had a great experience dealing with this company they were very professional and knowledgeable about mold testing. They were also reasonable in their pricing! I highly recommend using this company for mold testing."
Response time4 hrs
Response rate93%
1 neighbors recently requested a quote
Avatar for Express Dry
Express Dry
5.0(
12
)
Mold & Toxic Material TestIndoor Air Quality TestingDry-rot, Water or Pest Damage - Major Repair+3 more

Serving Riverside, CA and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Noah scheduled an estimator to come to my house 30 minutes after my phone call. Moises came and gave me a reasonable price. He was prompt and courteous. The next day Hiram and Orge came to do the work. They were prompt and friendly. They did an excellent job removing the mold. Brian called me to keep me appraised of what they did and how long they will be leaving the dehumidifier and other drying equipment in the garage. This company is prompt, professional, and courteous and did an excellent job. I would definitely use them again."
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+9

Response time1 day
Response rate100%
5 neighbors recently requested a quote
Pacific Environmental & Abatement Solutions Inc
4.6(
10
)
Mold & Toxic Material TestIndoor Air Quality TestingMold & Toxic Material Test - For Business+2 more

Serving Riverside, CA and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"The tester was well versed in this area even showing the areas that were high in moisture. Very friendly and informative as well as professional. Made me comfortable with the experience she had. When the owner and maintenance worker failed she made me comfortable. Fae who had the credentials as well experience explained everything in detail. Definitely use Fae!!!"
1 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for NexGen Property Restoration
NexGen Property Restoration
5.0(
9
)
Toxicity and Mold - RemovalToxicity and Mold - Removal - For Business

Serving Riverside, CA and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"We had a water damage issue at our home and when Nexgen Property Restoration opened up the walls it turned into a much bigger problem than expected. They found mold and other issues we had no idea were there. Their team handled everything from remediation to drying out the house and made the whole process smooth. They worked directly with our insurance company and got everything covered which was a huge relief. They even helped us out by waiving our $2,500 deductible which says a lot about how they take care of their customers. They may be a newer company but they clearly have years of experience behind them. Highly recommend Nexgen Property Restoration you won?t regret it."
26 neighbors recently requested a quote
Sav-on Home Improvement
3.3(
211
)
Mold & Toxic Material TestIndoor Air Quality Testing

Serving Riverside, CA and surrounding areas

Approved

In business since 1982

Free estimates

Emergency services offered

"SavOn/Ivan came out immediately and tested the area in question. I had mold in my dining room ceiling, not airborne thank God; but mold none the less needing remediation. SavOn completed the remediation in about 4 days and were very thorough, professional and attentive. Taylor in the office and Ivan in the field provided excellent service. SavOn was a little pricey but not as astronomical as the other companies. My project is not yet completed due to a lack of funds on my part but the cosmetic repairs will be completed soon and I'll keep you posted on the progress. Angel A"
grey hawk shower
val vista lakes shower
Response time9 hrs
45 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for HOME RESTORATION LLC
HOME RESTORATION LLC
5.0(
3
)
Toxicity and Mold - Removal

Serving Riverside, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"I recently hired Home Restoration for mold remediation, and I couldn?t be happier with the results. The team was friendly, professional, and really cared about making sure everything was done right. They made a stressful situation so much easier?highly recommend them!"
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 (BURST WATER HEATER)

+4

Response time5 hrs
Response rate100%
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Mold Testing and Remediation FAQs, answered by experts

Several factors affect the color of mold, including humidity levels, age of the mold, and amount of light it receives. A patch of mold that starts out green may darken and turn black as it ages. A species of mold may be green if growing in one environment, but be black in another environment. Color usually isn't a reliable way to determine mold species or risk.

Yes, exposure to fiberglass insulation can cause harm to your skin and eyes. However, this typically refers to the fiberglass insulation that is mostly used in walls and attics. Fiberglass doors don’t pose risks for fiberglass exposure because they're fully encased in polymer cladding.

In most cases, it is safe to return home after mold remediation is complete. You should follow your mold remediation technician’s recommendations, but most pros request that homeowners wait one day after the process is complete to move back in.

After returning home, be sure to carefully inspect the exposed areas for any remaining signs of mold spores. Contact the mold remediation company if you detect any lingering mold.

White mold is generally considered less harmful than black mold, which can be more toxic due to the mycotoxins it produces. However, white mold can still be harmful, particularly for individuals with mold allergies, asthma, or other respiratory conditions. Exposure can cause symptoms like nasal stuffiness, throat irritation, coughing, or skin irritation, and it can exacerbate existing health issues. Because any type of mold can pose health risks, all mold infestations should be treated seriously. Prompt remediation is necessary, and you should take proper precautions, such as wearing protective gear and using appropriate cleaning agents, when dealing with it.

Mold doesn’t take long to form, especially in dark, isolated areas like under the floorboards, where you’re less likely to know it’s wet in the first place. Mold can take root and proliferate in just 24 to 48 hours, but it can be up to a week before you start to notice funky smells. 

The Riverside, 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.