Water purveyors ensure that the water delivered to their customers meets or exceeds all drinking water requirements. However, once the water flows past the customer meter, the purveyor typically no longer has control over the use and subsequently the quality of the water.

Under certain hydraulic conditions, water can flow in the opposite direction from the intended direction of flow. If a cross-connection exists or is created, chemicals, water from another source, gases, solids or substances other than potable water may be introduced into the water distribution system or public or private water system. This can cause the water quality to be compromised and, in some cases, cause illness, injury and even death. 

What are Cross-Connections?

A cross-connection is any actual or potential connection between a potable water supply and any pipe, vessel, tank, plumbing fixture, equipment or device through which it is possible for used, polluted or contaminated water or any other substance to enter the potable water system.

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