Cross-connection control is a vital part of protecting our drinking water quality as the water passes through the distribution system to all the buildings in the city. 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 Bellingham requires that all cross-connections or potential cross-connections have a backflow preventer installed and tested annually.
What is cross-connection and backflow?
Choices and Requirements
Types of backflow preventers and specific applications
Questions and Answers
State certified testers, Backflow Assembly Test Report form, and answers to frequently asked questions
State regulations, required permits, and City municipal codes
For answers to specific cross-connection control questions, contact the Cross-Connection Control Specialists at the Operations Division of the Public Works Department.