The Water Quality staff monitors and tests the source waters for the groundwater system, and operates water production facilities. We sample and test for water purity daily throughout the entire distribution system to assure compliance with federal, state, and local requirements. We also handle all cross connection control and backflow prevention issues.  A cross connection is a physical connection between fresh drinking water piping and any piping containing undesirable or contaminated liquids.  This issue is resolved by installing a backflow preventer.  Backflow devices must be tested upon installation, and annually thereafter.  The City of Redmond’s Cross Connection Control Program mails out reminder letters annually to all homeowners that need to have their devices tested.  This is a simple procedure performed by any State Certified Backflow Tester. We will provide a list of local certified testers if requested.  You can verify a tester’s certification by name or certification number on the following website:  Backflow Assembly Tester Certification Verification.  If you have any questions about cross connection, backflow devices or testing, please call Kathy Caldwell, Cross Connection Program Administrator at 425-556-2847.
 
For more information see our annual Water Quality Report or call Tom Fix, Senior Water Quality Analyst at 425-556-2847 for questions about drinking water safety, chemical make up, and taste and odor concerns. For ideas on water conservation visit our Drinking Water pages.