Cal. Water Code § 31144.6

Any violation of a regulation of the district adopted pursuant to Section 31144 is a misdemeanor punishable by a fine not to exceed five hundred dollars ($500), or imprisonment in the county jail not to exceed 60 days, or by both that fine and imprisonment. Each day of the violation shall constitute a separate offense. Any violation or threatened violation of a regulation of the district may also be enjoined by civil suit.