1 San Francisco Public Utilities Commission
Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
January 20, 2026
January 20, 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 325,400 360,360 34,960 90.3% 68.1%
Cherry 245,500 273,345 27,845 89.8% -
Eleanor 23,710 27,100 3,390 87.5% -
Water Bank 562,628 570,000 7,372 98.7% 97.9%
Total Tuolumne Storage 1,157,238 1,230,805 73,567 94.0% - Local System
Calaveras 62,401 96,670 34,269 64.6% -
San Antonio 48,132 53,266 5,134 90.4% -
Crystal Springs 52,774 68,953 16,179 76.5% -
San Andreas 14,082 18,675 4,593 75.4% -
Pilarcitos 1,775 3,125 1,350 56.8% -
Total Local Storage 179,164 240,689 61,525 74.4% -
Total System Storage 1,336,402 1,471,494 135,092 90.8% 80.6% Total without water bank 773,774 901,494 127,720 85.8% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
January 19, 2026
12-Month Median Total: 30.92 inches
Current Year Total: 17.85 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of January 19, 2026
12-Month Median Total: 23.35 inches
Current Year Total: 15.62 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
California Precipitation Forecast
11 Upcountry Precipitation Forecast
Total Deliveries
12