Backflow Prevention Program

The City of Marietta Water Treatment & Distribution Department administers the Backflow Prevention Program as defined in the Codified Ordinance No. 927.08 (1990).
The purpose of Backflow Prevention Program is to prevent backflow and cross-connections of the public water supply after it has entered the water customer’s piping system.
Our requirements and guidelines were adopted as recommended by the Ohio Environmental Protection Agency.
drinking waterBackflow Prevention devices are required to be tested annually to make sure the devices are in proper working condition. It is the customers/property owners responsibility to install (as per City of Marietta specifications) and have backflow devices tested by a qualified tester; backflow prevention devices will also be required on residential service connections. The type of device required will depend on the degree of hazard your service connection exposes our water system to.
Examples of hazards: lawn irrigation, swimming pools, fire suppression, residential boilers, etc.

Before you do water service changes, new projects, plumbing renovations, please call our Backflow Prevention Department at 740-374-6864 for information on what is required..

Removing or relocating an existing backflow device without the approval of the City of Marietta Backflow Department will result in the loss of your water services.

If you have any questions or concerns, please contact the Backflow Department at 740-374-6864 or E-mail This email address is being protected from spambots. You need JavaScript enabled to view it.