1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
January 6, 2025
January 6, 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 244,000 360,360 116,360 67.7% 66.8%
Cherry 254,000 273,345 19,345 92.9% -
Eleanor 23,210 27,100 3,890 85.6% -
Water Bank 545,331 570,000 24,669 95.7% 98.1%
Total Tuolumne Storage 1,066,541 1,230,805 164,264 86.7% - Local System
Calaveras 74,503 96,670 22,167 77.1% -
San Antonio 48,111 53,266 5,155 90.3% -
Crystal Springs 50,365 68,953 18,588 73.0% -
San Andreas 15,910 18,675 2,765 85.2% -
Pilarcitos 2,341 3,125 784 74.9% -
Total Local Storage 191,230 240,689 49,459 79.5% -
Total System Storage 1,257,771 1,471,494 213,723 85.5% 78.9% Total without water bank 712,440 901,494 189,054 79.0% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
January 5, 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 5, 2025
12-Month Median Total: 23.35 inches
Current Year Total: 10.77 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries