Cal. Health & Saf. Code § 6960.4
Prior to any decision on the question of the formation of the proposed zone, the board shall obtain approval for the proposed plan for wastewater disposal from the affected regional water quality control board if such plan involves the disposal of wastewater to a wastewater treatment facility. For any other method of wastewater disposal, and prior to any decision, the board shall obtain approval for the proposed plan from the local health officer and the affected regional water quality control board. The affected regional water quality control board or the local health officer shall not approve any plan which does not comply with applicable requirements of federal, state, regional, or local law, order, regulation, or rule relating to water pollution, the disposal of waste, or public health.
Ca. Health and Saf. Code § 6960.4