OCWD Management Area
Figure 1-2: Groundwater Elevation Contours for the Principal Aquifer, June 2021
GROUNDWATER STORAGE
The groundwater basin contains an estimated 66 million acre-feet when full. However, OCWD manages the basin within an established operating range of up to 500,000 acre-feet below full condition. This operating range was established to designate the levels of groundwater storage within which the basin that can be maintained without causing adverse impacts. In order to manage the basin within this operating range, OCWD calculates the amount of groundwater in storage on an annual basis. Long-term groundwater storage levels based on OCWD’s water year (July 1 to June 30) are shown in Figure 1-3 .
BASIN 8-1 ALTERNATIVE 2022 UPDATE
Executive Summary 1-4
Appendix F - 70
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