No Discharge Zones (NDZs)

Boat sewage discharge is banned in all Massachusetts waters.

Boat sewage can contain bacteria and viruses, nutrients, and chemicals that can be harmful to water quality and public health. No Discharge Zones, or NDZs, are designated bodies of water where the discharge of all boat sewage, whether treated or not, is prohibited. In 2014, the U.S. Environmental Protection Agency (EPA) approved the state’s designation of all of Massachusetts waters as an NDZ—capping 22 years of extensive work by the Massachusetts Office of Coastal Zone Management (CZM) and coastal communities and their partners to ensure the necessary waste pumpout facilities are available for boaters to use.

Index of NDZ Information

The following information is available on No Discharge Zones in Massachusetts:

For information on clean boating, see:

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