1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
March 06, 2023
March 6, 2023 Reservoir Storage
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 283,200 360,360 77,160 78.6% 64.5%
Cherry 194,300 273,345 79,045 71.1% -
Eleanor 20,350 27,100 6,750 75.1% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,067,850 1,230,805 162,955 86.8% - Local System
Calaveras 96,444 96,670 226 99.8% -
San Antonio 53,198 53,266 68 99.9% -
Crystal Springs 52,324 68,953 16,629 75.9% -
San Andreas 16,518 18,572 2,054 88.9% -
Pilarcitos 2,585 3,125 540 82.7% -
Total Local Storage 221,069 240,586 19,517 91.9% -
Total System Storage 1,288,919 1,471,391 182,472 87.6% 80.2% Total without water bank 718,919 901,391 182,472 79.8% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
March 4, 2023
Avg Annual Total: 36.68 inches
YTD Total: 44.16 inches
Bay Area 7-station Precipitation Index
as of March 4, 2023
Avg Annual Total: 22.80 inches
YTD Total: 33.51 inches
Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
National Precipitation Forecast
Total Deliveries