California Code, Health and Safety Code - HSC § 4733

(a) The district board may fix the amount of compensation per meeting to be paid each member of the board for services for each meeting attended by the member.  Subject to subdivision (b), the compensation shall not exceed one hundred dollars ($100) for each meeting of the district board attended by the member or for each day's service rendered as a member by request of the board, not exceeding a total of six days in any calendar month, together with any expenses incident thereto.

(b) The district board, by ordinance adopted pursuant to Chapter 2 (commencing with Section 20200) of Division 10 of the Water Code, may increase the compensation received by the district board members above the amount of one hundred dollars ($100) per day.

(c) For purposes of this section, the determination of whether a director's activities on any specific day are compensable shall be made pursuant to Article 2.3 (commencing with Section 53232) of Chapter 2 of Part 1 of Division 2 of Title 5 of the Government Code.

(d) Reimbursement for these expenses is subject to Sections 53232.2 and 53232.3 of the Government Code.