What is a cross connection?

Water distribution systems are designed so that water flows in one direction from the treatment plant to the customer. Cross connections are any unprotected actual or potential connection or structural arrangement between a public or a consumer’s potable water system and any other source or system through which it is possible to introduce into any part of the potable system any used water or substance other than the intended potable water. Bypass arrangements, jumper connections or any other temporary or permanent connections through which backflow can occur are considered to be cross connections. Federal and state laws require Water Purveyors to protect their system from cross connections and backflow.

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1. What is a cross connection?
2. What is a backflow?
3. What can I do to help prevent a cross-connection?