Water Supply Conditions Update
Ellen Levin
Acting Assistant General Manager, Water
March 31, 2025
March 31, 2025 Reservoir Storage
2 Storage as of:
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 269,700 360,360 90,660 74.8% 60.9%
Cherry 244,800 273,345 28,545 89.6% -
Eleanor 23,700 27,100 3,400 87.5% -
Water Bank 570,000 570,000 0 100.0% 99.0%
Total Tuolumne Storage 1,108,200 1,230,805 122,605 90.0% - Local System
Calaveras 78,385 96,670 18,285 81.1% -
San Antonio 45,024 53,266 8,242 84.5% -
Crystal Springs 43,284 68,953 25,669 62.8% -
San Andreas 15,757 18,675 2,918 84.4% -
Pilarcitos 1,910 3,125 1,215 61.1% -
Total Local Storage 184,360 240,689 56,329 76.6% -
Total System Storage 1,292,560 1,471,494 178,934 87.8% 80.3% Total without water bank 722,560 901,494 178,934 80.2% -
31-Mar-2025
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
March 30, 2025
12-Month Median Total: 30.92 inches
Current Year Total: 26.04 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of March 30, 2025
12-Month Median Total: 23.35 inches
Current Year Total: 21.50 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
10 National Precipitation Forecast
11 Total Deliveries