Marine Sanitation Devices
Human sewage from boats is a source of pollution that poses environmental and health problems. It is important that you dispose of your sewage properly while boating. It is unlawful to place, leave, or discharge sewage into waters of this state.
If you have a recreational vessel with installed toilet facilities, it must have on board an operable marine sanitation device (MSD) that is self contained and incapable of discharging directly into the water. Any MSD with a "Y" valve that could direct waste overboard must be secured so that the valve cannot be opened.