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Pollution Prevention

Pollution Prevention > Clean Vessel Act (CVA) Grant Program > Clean Vessel Act: Are You In Compliance? Clean Vessel Act: Are You In Compliance?

Equipment on Boat:

  • Installed toilet without MSD
    • Legal: No
    • Restrictions and Comments: USCG regulations require that all installed toilets have an attached MSD
  • Installed toilet with macerator
    • Legal: No
    • Restrictions and Comments: USCG regulations require that all installed toilets have an attached MSD
  • Installed toilet with Type I MSD *
    • Legal: Yes (but not in "No Discharge Areas")
    • Restrictions and Comments: Acceptable on boats <65'. Discharge is <1000 per 100 milliliters of fecal coliform bacteria with no visibly identifiable floating solids
  • Installed toilet with Type II MSD *
    • Legal: Yes (but not in "No Discharge Areas")
    • Restrictions and Comments: Acceptable on any size boat. Found on larger boats because of electricity and space requirements. Discharge is <200 per 100 milliliters of fecal coliform bacteria with <150 milligrams of suspended solids per liter.
  • Installed toilet with Type III MSD *
    • Legal: Yes
    • Restrictions and Comments: Keeps waste out of water by using a holding tank. Discharge at onshore pumpout facility or via "Y" valve when more than 3 miles offshore in the ocean.
  • Portable toilet
    • Legal: Legal on any Boat
    • Restrictions and Comments: Doesn't fall under USCG regulations of MSDs
  • No installed toilet
    • Legal: Yes
    • Restrictions and Comments: Remember No Discharge Area rules

The U.S. Coast Guard provides additional information on MSDs.