No person shall place, deposit, or dump any human excreta in or upon the navigable waters of this state, that are within any marina, yacht harbor, fresh water lake, or fresh water impoundment, from any vessel tied to any dock, slip, or wharf that has toilet facilities available for the use of persons on the vessel.
Source:
Section 117515, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=117515..