Table 7 - 5.A DWR Submittal Table Five-Year Drought Risk Assessment Table – Potable
DWR Submittal Table 7-5 Retail: Five-Year Drought Risk Assessment - Potable 2026 Total Total Water Use 55,418 Total Supplies 99,623 Surplus/Shortfall w/o WSCP Action 44,205 2027 Total Total Water Use 55,972 Total Supplies 100,183 Surplus/Shortfall w/o WSCP Action 44,211 2028 Total Total Water Use 56,532 Total Supplies 100,743 Surplus/Shortfall w/o WSCP Action 44,211 2029 Total Total Water Use 55,967 Total Supplies 101,303 Surplus/Shortfall w/o WSCP Action 45,336 2030 Total Total Water Use 53,168 Total Supplies 101,863 Surplus/Shortfall w/o WSCP Action 48,695 NOTE : [1] Use totals are based on: 5% increase in Year 1; 1% increase in Year 2 and Year 3; 1% decrease in Year 4; and a 5% decrease in Year 5 .
Drought Risk Assessment Conclusions A. Surplus and Shortfall without WSCP Actions
The Surplus and Shortfall without WSCP Action calculations shown in DWR Table 7-5 A compare the difference between the projected supply and projected demand in each year of drought without any WSCP actions or responses. In IRWD’s DRA, the results indicate a water supply surplus in each of the five years. B. Planned WSCP Actions IRWD projects a surplus in each of the five years and therefore does not anticipate that any WSCP response actions would be required during the five-year drought risk assessment period. IRWD has ongoing conservation programs in effect and at its discretion the IRWD Board could trigger the WSCP in response to regional shortages. As described further in Section 8 and WSCP Appendix E , when Metropolitan declares a shortage and implements its Water Supply Allocation Plan, IRWD would only be in a Level 1 shortage condition (less than 10%, see Appendix E – IRWD 2025 WSCP ). This high level of water supply reliability is due to IRWD’s diverse local water supply portfolio, reduced reliance on imported supplies, and water banking programs.
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IRWD – 2025 Urban Water Management Plan
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