1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
December 2, 2024
December 2, 2024 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 240,800 360,360 119,560 66.8% 68.3%
Cherry 246,700 273,345 26,645 90.3% -
Eleanor 16,250 27,100 10,850 60.0% -
Water Bank 567,216 570,000 2,784 99.5% 98.0%
Total Tuolumne Storage 1,070,966 1,230,805 159,839 87.0% - Local System
Calaveras 78,842 96,670 17,828 81.6% -
San Antonio 48,380 53,266 4,886 90.8% -
Crystal Springs 52,445 68,953 16,508 76.1% -
San Andreas 15,846 18,675 2,829 84.9% -
Pilarcitos 2,327 3,125 798 74.5% -
Total Local Storage 197,840 240,689 42,849 82.2% -
Total System Storage 1,268,806 1,471,494 202,688 86.2% 78.1% Total without water bank 701,590 901,494 199,904 77.8% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
December 1, 2024
12-Month Median Total: 30.92 inches
Current Year Total: 4.58 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of December 1, 2024
12-Month Median Total: 23.35 inches
Current Year Total: 4.27 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries