San Mateo County Cross Control Program
San Mateo County Backflow Testing
Cross Connection Control Program
The Health System’s Environmental Health Services contracts with water purveyors to implement a cross-connection program as mandated by the State Resources Control Board, Drinking Water Division (formerly under the California Department of Public Health), Title 17 of the California Code of Regulations, and the State Health and Safety Code.
The following water purveyors are a part of the San Mateo County Cross Connection Control Program as illustrated in this map:
O’Connor Tract Co-op Water Company (East Palo Alto)
The Cross Connection Control Program protects the public drinking water supply in San Mateo County. As a part of the San Mateo County Cross Connection Control Program, surveys and/or inspections are conducted at facilities or services that may pose a threat to public health and safety. To eliminate the cross connection or threat to public health, the installation of a backflow prevention assembly may be required in order to abate the public health hazard.
In addition to conducting inspections and certifying testers, Cross Connection Control Program staff work with large water suppliers in the following ways:
Ensure that the potable water supply is protected by the installation of backflow prevention assemblies and verify the annual maintenance/testing of these assemblies
Certify and audit Backflow Prevention Assembly Testers
Consult with varying agencies and the public on how to prevent backflow
A cross-connection refers to an unprotected actual or potential connection between a potable water system used to supply water for drinking purposes and any source or system containing unapproved water or a substance that is not, or cannot be, approved as safe, wholesome and potable.