The district board shall have authority to fix and charge tolls for the sale or lease and/or distribution of electric power or water, as herein provided, and to collect said tolls from all persons using such service. All tolls shall be collected by such officer as the board shall designate and shall be deposited monthly with the county treasurer of the county in which the organization of the reclamation district was effected, and shall be credited to such fund of the district as the district board shall designate.