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Learn about our screening process

34 Years In Business

Company Details


PO BOX 1754


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Service Details

  • Residential Work
  • Commercial Work

Areas of Expertise

  • Air Quality Testing
  • Mold and Bacteria Testing
View All Offerings and Cities Served

Cost Information

  • Free Estimates


25 Verified Reviews
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
Showing 1-10 of 25 results
5.0 Kevin I. Los Altos, CA


5.0 Shiroy C. Sunnyvale, CA

Had a good experience with David from Certified-Environmental. He was on time, did the test according to industry standards and got the results back on time as promised. I only wish it was less expensive!

4.0 Loen A. Los Altos, CA

I was expecting the agent to get under my house and check for mold where I had had a previous and severe water break last winter. His samples were taken only around the exterior and a couple of spots on the interior of my house.

Response from Company:

We do not use agents, ALL of our inspectors are Board Certified Indoor Environmentalist. We rarely inspect crawl spaces, however access is needed and in this case there was no access. Several locations were identified with prior water damage but the homeowner agreed to have one location tested. We are sorry our client was unhappy with our service, but we did everything necessary to provide a complete inspection and indoor air quality report.

4.5 Ali A. Sunnyvale, CA

5.0 Mary A. Gilroy, CA

5.0 Sue L.

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.

3.0 Farzad T. Los Altos, CA

The testing procedure seemed very perfunctory.

Response from Company:

There is always a person that is not happy, we are sorry. We do every inspection and test in order to certify the home healthy. Nothing perfunctory.

5.0 Michelle V. San Jose, CA

5.0 Lisa L. Dublin, CA

5.0 Leslie K. Gilroy, CA

Great service!!



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Seal of Approval

What is the screening process that Service Professionals go through in order to become members of the HomeAdvisor network?

  1. Verify Trade License
    HomeAdvisor checks to see if the business carries the appropriate state-level license.
  2. Verify Insurance
    As a part of our screening process, we encourage professionals to carry general liability insurance. We require coverage for hundreds of services.
  3. Verification of State Business Filings
    For business types that require a Secretary of State filing, we confirm that the business is in good standing in the state in which it is located.
  4. Criminal Records Search
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  5. Sex Offender Search
    We confirm that the owner/principal is not listed on the official state Sex Offender web site in the state in which the owner/principal of the company is located.
  6. Bankruptcy Search
    We use 3rd party data sources to check the history of the principal/owner of the business for bankruptcy filings by or against them.
  7. Legal Search for Civil Judgments
    We use 3rd party data sources to check the principal/owner of the business for state level civil legal judgments entered against them.
  8. Liens Search
    We use 3rd party data sources to check the principal/owner of the business for liens placed against them.
  9. Identity Verification (SSN)
    HomeAdvisor verifies the social security number(s) of the owner/principal for identity check purposes. This check applies primarily to smaller business entities.
  10. Identity Verification (Reverse Phone Lookup)
    We conduct a reverse business phone lookup to identify records matching the phone number information provided by the business.

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