1 San Francisco Public Utilities Commission
Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
March 02, 2026
March 02, 2026, 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 317,700 360,360 42,660 88.2% 65.2%
Cherry 242,600 273,345 30,745 88.8% -
Eleanor 23,970 27,100 3,130 88.5% -
Water Bank 570,000 570,000 0 100.0% 98.8%
Total Tuolumne Storage 1,154,270 1,230,805 76,535 93.8% - Local System
Calaveras 65,899 96,670 30,771 68.2% -
San Antonio 44,490 53,266 8,776 83.5% -
Crystal Springs 49,804 68,953 19,149 72.2% -
San Andreas 14,664 18,675 4,011 78.5% -
Pilarcitos 1,878 3,125 1,247 60.1% -
Total Local Storage 176,735 240,689 63,954 73.4% -
Total System Storage 1,331,005 1,471,494 140,489 90.5% 80.6% Total without water bank 761,005 901,494 140,489 84.4% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
March 1, 2026
12-Month Median Total: 30.92 inches
Current Year Total: 23.56 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of March 1, 2026
12-Month Median Total: 23.35 inches
Current Year Total: 20.78 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
California Precipitation Forecast
11 Upcountry Precipitation Forecast
Total Deliveries
12