It shall be unlawful for any person to deposit, or cause to be deposited, or to permit to accumulate in any watercourse any litter, brush, stumps, earth, household trash, rubbish, or garbage or any other material or matter which can or may obstruct, divert, or interfere with the natural flow of water or to discharge any pollutant as defined in Larkspur Municipal Code Chapter 9.11. It shall be unlawful for any person to discharge, deposit, or cause to be deposited, or to permit to accumulate any of the aforementioned material in, or on, any bank adjacent to the watercourse. (Ord. 1030 § 2(7), 2018; Ord. 1005 § 3, 2015; Ord. 344 § 1 (part), 1967; Ord. 186 § 4, 1948)