1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
November 6, 2023
November 6, 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 316,500 360,360 43,860 87.8% 72.8%
Cherry 249,800 273,345 23,545 91.4% -
Eleanor 18,220 27,100 8,880 67.2% -
Water Bank 570,000 570,000 0 100.0% 98.2%
Total Tuolumne Storage 1,154,520 1,230,805 76,285 93.8% - Local System
Calaveras 86,455 96,670 10,215 89.4% -
San Antonio 49,286 53,266 3,980 92.5% -
Crystal Springs 50,762 68,953 18,191 73.6% -
San Andreas 13,757 18,675 4,918 73.7% -
Pilarcitos 2,577 3,125 548 82.5% -
Total Local Storage 202,837 240,689 37,852 84.3% -
Total System Storage 1,357,357 1,471,494 114,137 92.2% 78.5% Total without water bank 787,357 901,494 114,137 87.3% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
November 5, 2023
Avg Annual Total: 36.68 inches
YTD Total: 0.23 inches
6 Bay Area 7-station Precipitation Index
as of November 5, 2023
Avg Annual Total: 22.80 inches
YTD Total: 0.71 inches
7 Water Available to the City
8 9
National Precipitation Forecast
Total Deliveries
10