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Question 1

WHAT IS BACKFLOW AND HOW DOES IT OCCUR?

Answer

Backflow is the undesirable reversal of flow of water or mixtures of water and other substances back into the public drinking water system. This is usually caused by backpressure, which occurs when downstream pressure rises above the supply pressure. (Manual of Cross-Connection Control. Foundation for Cross-Connection Control and Hydraulic Research, University of Southern California, 2017.)

Question 2

WHAT IS CROSS-CONNECTION?

Answer

A cross-connection is a temporary or permanent connection between the public potable drinking water system and a consumer's water system that could potentially introduce contamination or pollution into the public or private drinking water system. (Manual of Cross-Connection Control. Foundation for Cross-Connection Control and Hydraulic Research, University of Southern California, 2017.)

Question 3

WHAT HAPPENS IF I DO NOT HAVE MY BACKFLOW ASSEMBLY TESTED AND MAINTAINED AS REQUIRED?

Answer

To comply with California Administrative Code Title 17, your Water District requires that all backflow assemblies are tested as soon as they are installed or relocated, and annually. If the backflow assembly is not tested, maintained, or removed from its approved location, the district maY discontinue water service to the premises.