Code of Federal Regulations Title 43. Public Lands:  Interior § 43.423.34 Sanitation

(a) You must not bring or improperly dispose of refuse on Reclamation facilities, lands, and waterbodies. Both the owner and the person bringing or disposing refuse may be issued a citation for violating this provision.

(b) Campers, picnickers, and all other persons using Reclamation lands must keep their sites free of trash and litter during the period of occupancy and must remove all personal equipment and clean their sites before departure.

(c) You must not place or construct a toilet or latrine such that its lowest point is lower than the high water mark of any Reclamation waterbody, or within 150 feet horizontally of the high water mark of any Reclamation waterbody.