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If you have a recreational vessel with installed toilet facilities, it must have an operable marine sanitation device (MSD) on board.

The types of MSDs are:

  • Type III MSD, the simplest and most common, consists of holding tanks or portable toilets. It requires only a small storage space and is simple to operate. Type III MSDs have the least effect on the environment since the waste is to be discharged on shore into a local sewage treatment facility.
  • Types I and II MSDs are usually found on large vessels. Waste is treated with special chemicals to kill bacteria before the waste is discharged. Types I and II MSDs with “Y” valves that direct the waste overboard must be secured so that the valve cannot be opened. This can be done by placing a lock or non-reusable seal on the “Y” valve or by taking the handle off the “Y” valve.

All installed MSDs must be U.S. Coast Guard–certified.

A vessel may not be operated on Utah waters if it has a marine toilet that discharges any inadequately treated human body waste into the waters.

  • Pump-Out Station
  • Marine Sanitation Device diagram

It is illegal for the owner or operator of a vessel with a marine toilet to use, or permit the use of, a toilet unless equipped to adequately treat, hold, incinerate, or handle waste in a manner that prevents pollution of Utah waters.

It is illegal to discharge any human waste, whether treated or untreated, into Utah waters or lands adjacent to the waters.