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Environmental Health
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Call the Customer Call Center at:

(888) 700-9995

Telephone agents are available on Monday - Friday, 8:00AM - 5:00PM
Or visit our Environmental Health Online Complaint System
How to Find Us
County of Los Angeles
Department of Public Health
Environmental Health
5050 Commerce Drive
Baldwin Park, CA 91706
(888) 700-9995

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Certified Backflow Testers

Important Info:
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Any individual in Los Angeles County engaged in the business or occupation of testing, repairing or installing backflow prevention devices must become a Certified Backflow Tester. The certification process and monitoring of testers is performed by the Cross Connection and Water Pollution Control Program.

To become a Certified Backflow Tester, an individual must take and pass a practical examination every two years. They are required to demonstrate their ability to test double check valve assemblies, test reduced pressure principle backflow prevention devices, inspect pressure type vacuum breakers, and evaluate spill resistant pressure vacuum breakers. Upon successful completion of the examination, the certification is valid for a two year period. To qualify for the examination, an applicant must have the necessary knowledge to test backflow prevention devices and either be employed by a California State Licensed Contractor or possess a State Contractor’s License.

Upon receipt of backflow tester application and fee payment, an examination date will be scheduled. Exams are administered approximately three times per month, on Wednesdays, in the Backflow Testing Laboratory at the Environmental Health administrative headquarters in Baldwin Park.

The fee for taking the Certified Backflow Tester Examination is $296.

The biennial review fee is $296.

The menu above contains numerous documents and information relating to backflow prevention. You will need Adobe Acrobat Reader to view the documents.
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Permit or License
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A convenience fee per transaction will apply. The convenience fees for Credit Card, Debit Card, and Electronic Check are 2.25% of payment, $1.49, and $0.95 respectively. Please have your Account ID and your Facility ID numbers from your billing statement ready. Payment will only be accepted online for the total amount owed on an account. Terms and Conditions apply. For more information about Permit and License Billing, please vist our Payment information page .
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Director of Environmental Health
Angelo J. Bellomo
Director's Biography
Los Angeles County Seal: Enriching lives through effective and caring services