1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
July 14, 2025
July 14, 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 352,800 360,360 7,560 97.9% 98.6%
Cherry 261,200 273,345 12,145 95.6% -
Eleanor 26,290 27,100 810 97.0% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,210,290 1,230,805 20,515 98.3% - Local System
Calaveras 74,037 96,670 22,633 76.6% -
San Antonio 49,168 53,266 4,098 92.3% -
Crystal Springs 44,723 68,953 24,230 64.9% -
San Andreas 15,672 18,675 3,003 83.9% -
Pilarcitos 1,899 3,125 1,226 60.8% -
Total Local Storage 185,499 240,689 55,190 77.1% -
Total System Storage 1,395,789 1,471,494 75,705 94.9% 89.6% Total without water bank 825,789 901,494 75,705 91.6% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
July 13, 2025
12-Month Median Total: 30.92 inches
Current Year Total: 28.87 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of July 13, 2025
12-Month Median Total: 23.35 inches
Current Year Total: 22.63 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
10 11
California Precipitation Forecast
Total Deliveries
12