Cal. Wat. Code § 75630
The superior court of the county in which a water-producing facility within the district lies may issue a temporary restraining order upon the filing by the district of a petition or complaint setting forth that the person named therein as defendant is the operator of a water-producing facility which has not been registered with the district, or that such defendant is delinquent in the payment of a ground water charge.
Such temporary restraining order shall be returnable to the court on or before 10 days after its issuance.
Service of process is completed by posting a copy of the summons and complaint upon the water-producing facility or the parcel of land upon which it is located and by personal service upon the named defendant.
Ca. Water Code § 75630