A Backflow Prevention Device is required when there is a possible danger of contamination to the water distribution system, such as an auxiliary water supply on a property. Auxiliary water supplies include, but are not limited to, wells, springs, storage tanks, or water in pipes under pressure (other than the public water system).
State water quality control regulations require strict enforcement of California’s public health regulations regarding backflow prevention. The presence of any auxiliary water supply is sufficient cause for requiring installation of a Backflow Prevention Device, regardless of the actual use of such auxiliary supply.
Property owners who are required to have such a device on their water service can comply with the cross connection regulations (backflow prevention) by installing a District-approved device, such as a double check valve assembly or a Reduced Pressure Principal device (RP). Plans for installation of Backflow Prevention Devices must be approved by the District prior to installation.
Property owners are responsible for installation, inspection, and maintenance of Backflow Prevention Devices, and all associated costs. Backflow Prevention Devices must be inspected and tested on an annual basis by a District approved technician with a Backflow Testing Certification issued by an independent agency. Proof of testing must be submitted to the District each year. Please contact the District by phone or email for a list of local technicians with the necessary certification.
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