A Cross Connection is defined as any actual or potential physical connection between a public water system, or the customer's water system, and a source of non-potable liquid, solid or gas that could contaminate the public water system by backflow.
Cross Connection Control protects public health by requiring the installation of backflow prevention assemblies at all actual or potential cross connections. These assemblies must be registered with the District and tested annually by a certified backflow assembly tester (BAT).
Cross connections can exist in all plumbing systems; therefore the District operates and maintains a Cross Connection Control Program. This program helps reduce the risk of contaminates entering into the public water supply by monitoring cross connections and backflow protection.