1 Drought Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
February 21, 2023
February 21, 2023 Reservoir Storage
Reservoir
Current
Storage1,2,3
Maximum
Storage4
Available
Capacity
Percent of
Maximum
Storage
Normal
Percent of
Maximum
Storage5
(AF) (AF) (AF)
Tuolumne System
Hetch Hetchy 292,700 360,360 67,660 81.2% 66.6%
Cherry 210,600 273,345 62,745 77.0% -
Eleanor 19,500 27,100 7,600 72.0% -
Water Bank 570,000 570,000 0 100.0% 99.1%
Total Tuolumne Storage 1,092,800 1,230,805 138,005 88.8% - Local System
Calaveras 90,609 96,670 6,061 93.7% -
San Antonio 52,355 53,266 911 98.3% -
Crystal Springs 54,349 68,953 14,604 78.8% -
San Andreas 15,907 19,027 3,120 83.6% -
Pilarcitos 2,586 3,125 539 82.7% -
Total Local Storage 215,806 241,042 25,236 89.5% -
Total System Storage 1,308,606 1,471,847 163,241 88.9% 80.5% Total without water bank 738,606 901,847 163,241 81.9% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
February 20, 2023
Avg Annual Total: 36.68 inches
YTD Total: 37.45 inches
Bay Area 7-station Precipitation Index
as of February 20, 2023
Avg Annual Total: 22.80 inches
YTD Total: 29.66 inches
Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
National Precipitation Forecast
Total Deliveries
Governor Newsom’s February 13th Executive Order
• Continued the State Emergency Drought Declaration
• Key provisions of significance for the SFPUC:
• “To ensure adequate water supplies for purposes of health, safety, the environment, or drought resilient water supplies, the Water Board shall consider modifying requirements for reservoir releases or diversion limitations in Central Valley Project or State Water Project facilities to: (i) conserve water upstream later in the year in order to protect cold water pools for salmon and steelhead, (ii) enhance instream conditions for fish and wildlife, (iii) improve water quality, (iv) protect carry-over storage, (v) ensure minimum health and safety water supplies, or (vi) provide opportunities to maintain or to expand water supplies north and south of the Delta.” • “No later than April 28, 2023, state agencies shall send me their recommendations for what further actions, if any, are necessary for on-going emergency drought response, and their views on whether any existing provisions in my proclamations and executive orders related to the drought emergency are no longer needed to prepare for and mitigate the effects of the drought conditions.”
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