Discharge of Sewage and Waste
It is illegal to discharge untreated waste into any state or federally controlled waters.
If you have a recreational vessel with installed toilet facilities, it must have an operable marine sanitation device (MSD) on board that is approved by the Indiana Department of Environmental Management. You may get more information on treatment systems by contacting them at 1-800-451-6027.
There are three types of MSDs.
- 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 would 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. A Type I or II MSD can be operated lawfully on Lake Michigan only if maintained according to U.S. Coast Guard regulations.
- Type III MSDs provide no treatment and are either holding tanks or portable toilets. Collected waste should be taken ashore and disposed of in a pump-out station or onshore toilet.
Vessels 65 feet or less in length may use a Type I, II, or III MSD. Vessels more than 65 feet in length must install a Type II or III MSD.
All installed devices must be U.S. Coast Guard–certified.