1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
June 02, 2025
June 2, 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 362,100 360,360 0 100.0% 89.7%
Cherry 271,200 273,345 2,145 99.2% -
Eleanor 26,760 27,100 340 98.7% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,230,060 1,230,805 2,485 99.9% - Local System
Calaveras 76,633 96,670 20,037 79.3% -
San Antonio 47,325 53,266 5,941 88.8% -
Crystal Springs 44,619 68,953 24,334 64.7% -
San Andreas 16,047 18,675 2,628 85.9% -
Pilarcitos 1,959 3,125 1,166 62.7% -
Total Local Storage 186,583 240,689 54,106 77.5% -
Total System Storage 1,416,643 1,471,494 56,591 96.3% 84.0% Total without water bank 846,643 901,494 56,591 93.9% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
June 1, 2025
12-Month Median Total: 30.92 inches
Current Year Total: 28.85 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of June 1, 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
National Precipitation Forecast
Total Deliveries
12