What is backflow?

Backflow is the undesirable reversal of flow of non-potable water or other substance into the public water system or consumer's potable water system.

What is cross-connection?

Any connection between a public water system or consumer's potable water system and non-potable water or other substance.  An example is the public water system and a homeowner's landscape irrigation system.

Why the concern about cross-connection and backflow prevention?

Only through cross-connection controls and backflow prevention can we be assured that other sources are not contaminating our water system.

More information about backflow preventers and cross-connection control (84.6 kb)

Waterworks Backflow Test Form - official document (71.3 kb)

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