Draft 2025 Urban Water Management Plan

Table of Contents

6.6 Desalinated Water and Opportunities..…………………………...……………….6-17 6.7 Transfers and Exchanges……………...……………………………………………6-18 6.8 Supply From Storage…………………………………………………………….….6-19 6.9 Other………………………………………………………………………………….6-19 6.10 Future Water Projects and Supplies……………………………………………….6-19 6.11 Water Portfolio Summary: Existing and Planned Sources………………………6-21 Existing Sources……………………………………………………………………..6-21 Planned Sources…………………………………………………………………….6-22 6.12 Energy Intensity……………………………………………………………………….6-23 Section 7 | Water Supply Reliability and Drought Risk Assessment………………………………7-1 7.1 Constraints on Water Sources Considerations…………………………………….7-1 A. Recent IRWD Water Reliability Studies and Evaluations……………………….7-2 B. Historic Drought Analysis…………………………………………………………7-4 C. Water Supply Reliability Projections……………………………………………..7-4 7.2 Water Service Reliability Assessment………………………………………………7-8 A. Imported Water…………………………………………………………………….7-8 B. Groundwater Supply………………………………………………………………7-8 C. Non-Potable Water Management………………………………………………...7-9 D. Climate Change Considerations………………………………………………….7-9 E. Reduced Reliance on the Delta…………………………………………………7-10 7.3 Water Quality…………………………………………………………………………7-10 Groundwater Quality………………………………………………………………...7-11 Other Water Quality Considerations……………………………………………….7-11 Imported Water Quality……………………………………………………………..7-12 7.4 Drought Risk Assessment…………………………………………………………..7-12 Drought Risk Assessment Data Inputs and Methods…………………………….7-13 Drought Risk Assessment Data Inputs and Methods…………………………….7-15

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IRWD – 2025 Urban Water Management Plan – Table of Contents

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