Cross Connection Control

Cross Connection control is a vital part of protecting our drinking water. As the water passes through the distribution system to all the buildings in the City, it is important to ensure its safe. A cross - connection, or the opportunity for substances other than drinking water to enter the plumbing, can threaten the quality of our drinking water in the distribution system. The City of Bainbridge Island requires that all cross-connections or potential cross-connections have a backflow preventer installed and tested annually.  

General Information
What is a cross-connection and backflow?
Backflow Preventer Choices and Requirements
Types of backflow preventers and specific applications
Regulations & Forms
State regulations, required permits, state certified testers, backflow assembly test report form.
---View Forms for 1) Partial List of Local Certified BAT's, 2) COBI Backflow Assembly Test Report Form, 3) Hold Harmless Agreement.

 City Hired Backflow Testing Program 
 - - - Cross Connection Control Program Letter (Outline)
 - - - Backflow Program Cost Increase Letter 5/4/16 

Testing Questions & Answers
Frequently asked questions

Contact Us

  1. Operations & Maintenance

    7305 Hidden Cove Road

    Bainbridge Island, WA 98110

    Ph: 206-842-1212
    Fx: 206-780-5104

    Staff Directory

    --Report Pollution (Kitsap) 360-337-5777
    --Call Before you Dig: 811

More Information
For answers to specific cross-connection control questions, contact the cross connection control specialists at the Operations Division of the Public Works Department at (206) 842-1212 or email.