It is our commitment to provide you with the highest quality drinking water and to protect the water distribution system from contamination. You can help us fulfill this commitment by complying with Local and State Department of Health regulations regarding the installation and annual testing of backflow prevention devices. The greatest public health risk lies in the introduction of a contaminant into the public water supply system through a cross-connection.
A cross-connection is any physical connection whereby the drinking water supply (PUD water system) is connected, directly or indirectly, with any non-drinkable water supply (sprinkler system, boiler, fire suppression system or private well), which contains, or may contain, contaminated water. Non-drinkable water can potentially contaminate the water supply as a result of backflow. Backflow occurs when the normal direction of flow is reversed, generally through the loss of pressure from a water main break or the use of a fire hydrant for fire fighting.
In order to prevent the occurrence of backflow, the PUD, City of Clarkston, Asotin County, and the State of Washington Department of Health regulations require the installation of backflow prevention devices on all non-drinking water systems. Backflow devices help prevent potentially contaminated water from entering the public drinking water supply.
If you have a system connected to the public drinking water supply but do not have a backflow prevention device, one must be installed. Backflow devices must be those approved by the State of Washington for installation. Backflow devices are installed and owned by the homeowner and it is the homeowner’s responsibility to ensure that the backflow prevention devices are in satisfactory operating condition at all times.
If you have a Backflow device installed, Washington State Department of Health regulations require the testing backflow devices annually by a Washington State Certified to ensure proper operation. Click here for a list of Washington State certified Backflow Assembly Testers.
We appreciate your cooperation in this effort to protect the public drinking water supply.
Please contact the PUD at (509) 758-1010 if you have any questions.