What is Cross Connection and Backflow Prevention?

Cross Connection

A Cross Connection is a physical connection (piping configuration) between the public drinking water system and anything else, including another water supply, that can allow pollutants or contaminants to backflow into the public water system.

Backflow Prevention

Backflow occurs when a reverse flow of contaminated water or other substances from a customer's water system flows back into the public drinking water system. Not only is it the law to install backflow prevention mechanisms, it's important to make sure we protect our drinking water.

A backflow incident can seriously affect the quality and safety of our drinking water supply. Common examples of possible cross connections include landscape sprinkler systems, hose attachments for utility sinks, and garden hoses used for pools or other chemical contact purposes. Backflow prevention assemblies provide the public water system with protection against contamination or pollution.  Learn how to help prevent cross connection with proper connection assemblies.


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2. Who supplies my water?
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5. Why does the City flush Fire Hydrants?
6. Is my water safe to drink?
7. What is Cross Connection and Backflow Prevention?