1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
April 15, 2024
April 15, 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 290,400 360,360 69,960 80.6% 60.2%
Cherry 242,500 273,345 30,845 88.7% -
Eleanor 23,890 27,100 3,210 88.2% -
Water Bank 570,000 570,000 0 100.0% 99.0%
Total Tuolumne Storage 1,126,790 1,230,805 104,015 91.5% - Local System
Calaveras 94,512 96,670 2,158 97.8% -
San Antonio 50,961 53,266 2,305 95.7% -
Crystal Springs 47,292 68,953 21,661 68.6% -
San Andreas 13,927 18,675 4,748 74.6% -
Pilarcitos 2,562 3,125 563 82.0% -
Total Local Storage 209,254 240,689 31,435 86.9% -
Total System Storage 1,336,044 1,471,494 135,450 90.8% 79.7% Total without water bank 766,044 901,494 135,450 85.0% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
April 14, 2024
Normal Annual Total: 36.68 inches
YTD Total: 30.03 inches
6 Bay Area 7-station Precipitation Index
as of April 14, 2024
Normal Annual Total: 22.80 inches
YTD Total: 28.39 inches
7 Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
10 11
National Precipitation Forecast
Total Deliveries