What is a Backflow?
The definition of backflow is the undesired reversal of flow in a water system. Commercial and other high risk water users must install and maintain a backflow prevention device to prevent used or contaminated water from re-entering the water system. This device must be tested annually by a certified tester.

Public Works maintains an up-to-date list of qualified testers and includes this information to assist the property owner in choosing a tester who meets all requirements. All backflow preventer test information is then maintained at the Public Works office for Health Department inspection. If you have any questions regarding this program, please contact the Public Works Department at 858-755-3294.

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1. What is included on my bill?
2. Why is my bill so high?
3. I have questions about my utility bill. What do I do?
4. How do I sign up for auto pay?
5. Does the City of Del Mar accept credit card payments for utilities?
6. What is a Backflow?