1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
November 20, 2023
November 20, 2023 Reservoir Storage
2 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 309,300 360,360 51,060 85.8% 70.2%
Cherry 250,400 273,345 22,945 91.6% -
Eleanor 17,110 27,100 9,990 63.1% -
Water Bank 568,075 570,000 1,925 99.7% 98.2%
Total Tuolumne Storage 1,144,885 1,230,805 85,920 93.0% - Local System
Calaveras 85,964 96,670 10,706 88.9% -
San Antonio 49,134 53,266 4,132 92.2% -
Crystal Springs 49,541 68,953 19,412 71.8% -
San Andreas 16,086 18,675 2,589 86.1% -
Pilarcitos 2,558 3,125 567 81.8% -
Total Local Storage 203,283 240,689 37,406 84.5% -
Total System Storage 1,348,168 1,471,494 123,326 91.6% 78.0% Total without water bank 780,093 901,494 121,401 86.5% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
November 19, 2023
Avg Annual Total: 36.68 inches
YTD Total: 2.10 inches
6 Bay Area 7-station Precipitation Index
as of November 19, 2023
Avg Annual Total: 22.80 inches
YTD Total: 1.80 inches
7 Water Available to the City
8 9
National Precipitation Forecast
Total Deliveries
10