California Code, Penal Code - PEN § 374.7

(a) A person who litters or causes to be littered, or dumps or causes to be dumped, waste matter into a bay, lagoon, channel, river, creek, slough, canal, lake, or reservoir, or other stream or body of water, or upon a bank, beach, or shore within 150 feet of the high water mark of a stream or body of water, is guilty of a misdemeanor.

(b) A person convicted of a violation of subdivision (a) shall be punished by a mandatory fine of not less than two hundred fifty dollars ($250) nor more than one thousand dollars ($1,000) upon a first conviction, by a mandatory fine of not less than five hundred dollars ($500) nor more than one thousand five hundred dollars ($1,500) upon a second conviction, and by a mandatory fine of not less than seven hundred fifty dollars ($750) nor more than three thousand dollars ($3,000) upon a third or subsequent conviction.

(c) The court may, in addition to the fine imposed upon a conviction, require as a condition of probation, in addition to any other condition of probation, that any person convicted of a violation of subdivision (a), pick up litter at a time and place within the jurisdiction of the court for not less than eight hours.