Ohio Rev. Code Ann. § 1547.33

Except on the waters of Lake Erie, the Muskingum River, or the Ohio River, no person shall launch, moor, dock, use, operate, or permit to be operated on any of the waters in this state any vessel that contains a sink, toilet, or sanitary system that is capable of discharging urine, fecal matter, contents of a chemical commode, kitchen wastes, laundry wastes, slop sink drainage, or other household wastes into the waters in this state. Such a sink, toilet, or sanitary system shall be removed, sealed, or made to drain into a tank or reservoir that can be carried or pumped ashore for disposal in a sewage treatment works approved by the director of environmental protection.