The City of Bonney Lake operates and maintains a cross connection control program, in accordance with the Department of Health requirements per Washington Administrative Code (WAC) 246-290-490 which states, "Purveyors have the responsibility to protect the public water systems from contamination due to cross connection. Cross connections which can be eliminated shall be eliminated. The Purveyors shall work cooperatively with the local authorities to eliminate or control potential cross connections."

A Cross Connection is defined as any actual or potential connection between a potable water supply and any body of water, pipe, vessel, tank, plumbing fixture, equipment or device through which it is possible for used, polluted or contaminated water, or any other substance to enter into the potable water system.

Cross Connection Control protects public health by requiring the installation of backflow prevention assembly's at all actual or potential cross connections per the City's residential and commercial backflow prevention requirements. These assemblies must be registered with the City and tested annually by a Certified Backflow Assembly Tester (BAT).

The City of Bonney Lake is no longer accepting paper or emailed test reports. We have migrated to a new system for digital test report entry called SwiftComply, and will only be accepting reports submitted thought the new software. Please navigate to the SwiftComply Tester Registration to create an account. 

Cross connections can exist in all plumbing systems; therefore the City operates and maintains a Cross Connection Control Program. This program helps reduce the risk of contaminants entering into the public water supply by eliminating cross connections and ensuring backflow protection devices are installed and functioning correctly. For more information about our Cross Connection Control Program please email our Cross Connection Email.

Commercial Connections
Type of Connection Required Assembly
Requirements vary on the degree of potential hazard. Reduced Pressure Backflow Assembly

Nonresidential/Multi-Dwelling Fire Sprinkler System
Type of Connection Required Assembly
Systems with no chemicals added Double Check Valve Assembly
Systems with chemicals added or utilizing secondary sources of water Reduced Pressure Backflow Assembly

Residential Fire Sprinkler Systems
Type of Connection Required Assembly
Systems with no chemicals added Double Check Valve Assembly
Systems with chemicals added or utilizing secondary sources of water Reduced Pressure Backflow Assembly

Irrigation Systems
Type of Connection Required Assembly
Systems with no chemicals added Double Check Valve Assembly
Systems with chemicals added or utilizing secondary sources of water Reduced Pressure Backflow Assembly

Auxiliary Water Sources

Include but are not limited to lakes, streams, ponds, well and tanks. Because the City of Bonney Lake has no control over the quality of the auxiliary water source and because there is a potential for that water line to be connected to the City supplied water, the presence of these auxiliary water sources requires the installation of a reduced pressure backflow assembly on the customer's supply line behind the meter. Taking water from these sources is regulated by the Department of Ecology and is illegal.