1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
January 21, 2025
January 21, 2025 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 246,200 360,360 114,160 68.3% 68.2%
Cherry 253,100 273,345 20,245 92.6% -
Eleanor 21,250 27,100 5,850 78.4% -
Water Bank 545,748 570,000 24,252 95.7% 98.1%
Total Tuolumne Storage 1,066,298 1,230,805 164,507 86.6% - Local System
Calaveras 71,681 96,670 24,989 74.2% -
San Antonio 47,052 53,266 6,214 88.3% -
Crystal Springs 47,429 68,953 21,524 68.8% -
San Andreas 15,591 18,675 3,084 83.5% -
Pilarcitos 2,272 3,125 853 72.7% -
Total Local Storage 184,025 240,689 56,664 76.5% -
Total System Storage 1,250,323 1,471,494 221,171 85.0% 80.8% Total without water bank 704,575 901,494 196,919 78.2% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
January 20, 2025
12-Month Median Total: 30.92 inches
Current Year Total: 9.75 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of January 20, 2025
12-Month Median Total: 23.35 inches
Current Year Total: 10.78 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries