Cal. WAT § 12878.22

Any local agency obligated by Chapters 2 (commencing at Section 12639) and 4 (commencing at Section 12850) of this part, or by Section 8370 of this code, or by any other law of the State, to operate and maintain any unit, any part of whose territory has been incorporated in a maintenance area, or any local agency desirous of assuming the obligation of operating and maintaining any unit concerning which unit a maintenance area has been formed pursuant to this article, may petition the board or department to dissolve such maintenance area, and the board or department, after a hearing, may dissolve such maintenance area if in its discretion it finds it to be in the best interest of the State to do so.