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Santa Ana 2020 Water Shortage Contingency Plan <br />ii <br />Contents <br />Acronyms and Abbreviations ................................................................................................................................. v <br />1 INTRODUCTION AND WSCP OVERVIEW ................................................................................................... 1-1 <br />1.1 Water Shortage Contingency Plan Requirements and Organization .............................................. 1-1 <br />1.2 Integration with Other Planning Efforts ............................................................................................. 1-2 <br />2 BACKGROUND INFORMATION ................................................................................................................... 2-1 <br />2.1 City Service Area .................................................................................................................................. 2-1 <br />2.2 Relationship to Wholesalers ............................................................................................................... 2-3 <br />2.3 Relationship with Wholesaler Water Shortage Planning .................................................................. 2-5 <br />2.3.1 MET Water Surplus and Drought Management Plan .................................................................... 2-5 <br />2.3.2 MET Water Supply Allocation Plan ................................................................................................. 2-6 <br />3 WATER SHORTAGE CONTINGENCY PREPAREDNESS AND RESPONSE PLANNING ........................ 3-1 <br />3.1 Water Supply Reliability Analysis ....................................................................................................... 3-1 <br />3.2 Annual Water Supply and Demand Assessment Procedures.......................................................... 3-1 <br />3.2.1 Decision-Making Process ................................................................................................................ 3-2 <br />City Steps to Approve the Annual Assessment Determination ........................................... 3-2 <br />3.2.2 Data and Methodologies .................................................................................................................. 3-3 <br />Assessment Methodology ....................................................................................................... 3-3 <br />Locally Applicable Evaluation Criteria ................................................................................... 3-4 <br />Water Supply ............................................................................................................................. 3-4 <br />Unconstrained Customer Demand ......................................................................................... 3-5 <br />Planned Water Use for Current Year Considering Dry Subsequent Year ........................... 3-5 <br />Infrastructure Considerations ................................................................................................. 3-6 <br />Other Factors ............................................................................................................................ 3-6 <br />3.3 Six Standard Water Shortage Levels .................................................................................................. 3-7 <br />3.4 Shortage Response Actions ................................................................................................................ 3-9 <br />3.4.1 Demand Reduction ........................................................................................................................... 3-9 <br />3.4.2 Supply Augmentation ..................................................................................................................... 3-10 <br />3.4.3 Operational Changes ...................................................................................................................... 3-10 <br />3.4.4 Additional Mandatory Restrictions ............................................................................................... 3-10 <br />3.4.5 Emergency Response Plan (Hazard Mitigation Plan) ................................................................. 3-10 <br />MET’s WSDM and WSAP ........................................................................................................ 3-10