Cal. Water Code § 75637.5

Following the issuance of an injunction restraining the operation of a water-producing facility in accordance with Section 75631 and the termination of any stay, as a condition of allowing future operation of the facility, the district may require the operator to post a cash deposit or bond with the district providing future assurance of payment of delinquent groundwater charges. The district may require the cash deposit or bond to be in an amount equal to the amount of delinquent groundwater charges due for the preceding six-month period.