the current year and one dry year pursuant to factors in the code. Define six standard water shortage levels of 10%, 20%, 30%, 40%, 50% shortage, and greater than 50% shortage. These levels shall be based on supply conditions, including percent reductions in supply, changes in groundwater levels, changes in surface elevation, or other conditions. The shortage levels shall also apply to a catastrophic interruption of supply. Suppliers with an existing WSCP that uses different water shortage levels must
Water shortage contingency planning
Section 8 and Appendix E (WSCP Section 3)
10632(a)(3)(A)
Water shortage contingency planning
Appendix D ( Table 8-1)
10632(a)(3)(B)
cross reference their categories with the six standard categories.
Suppliers with WSCPs that align with the defined shortage levels must specify locally appropriate supply augmentation actions. Specify locally appropriate demand reduction actions to adequately respond to shortages.
Section 8, Appendix D (Table 8-2), Appendix E (WSCP Sections 3 and 4) Section 9, Appendix D (Table 8-3), Appendix E (WSCP Sections 3 and 4) Section 9, Appendix D (Table 8-2), Appendix E (WSCP Sections 3, 4, and 5) Section 9, Appendix D (Table 8-3), Appendix E (WSCP Section 4) Section 7, Appendix D (Table 8-2, 8-3), Appendix E (WSCP Sections 3 and 4)
Water shortage contingency planning
10632(a)(4)(A)
Water shortage contingency planning Water shortage contingency planning
10632(a)(4)(B)
Specify locally appropriate operational changes.
10632(a)(4)(C)
Specify additional mandatory prohibitions against specific water use practices that are in addition to State-mandated prohibitions are appropriate to local conditions. Estimate the extent to which the gap between supplies and demand will be reduced by implementation of the action.
Water shortage contingency planning
10632(a)(4)(D)
Water shortage contingency planning
10632(a)(4)(E)
Appendix A - 10
IRWD – 2025 Urban Water Management Plan – DWR Checklist
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