Cross Connection Control and Backflow Prevention

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Town of Leesburg Utilities Department strives to continuously ensure the safety of your drinking water. A vital link in this effort is the Town’s Cross Connection and Backflow Prevention Control Program (pdf). The Commonwealth of Virginia’s Department of Health Waterworks Regulations requires drinking water suppliers to establish and enforce a cross-connection and backflow prevention program. The goal of the program is to prevent contamination of the Town’s drinking water supply caused by backflow or backsiphonage.


Cross connection is a connection that occurs between a potable water supply and a non-potable or unapproved source.  This type of connection constitutes a serious public health hazard. 

Backflow is an undesirable flow reversal of water and other substances into the Town’s distribution system. Even though the water that reaches your home or business is safe, it can be contaminated by a backflow incident within your own piping and could contaminate or otherwise degrade water quality in the Town’s water distribution system.

The Town takes every precaution possible to prevent cross connections by working closely with consumers, contractors, engineers, and regulators to ensure that all those who are required to comply with cross-connection control and backflow prevention know the requirements.

Note that all backflow preventer devices shall be American Society of Safety Engineers' (ASSE) approved.

If you have any questions concerning backflow installations, certified testers, Backflow Test Report Form, or approved backflow prevention devices, please contact the Town's Environmental Compliance Inspector at (703) 737-7592.

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