Steven R. Ritchie
Assistant General Manager, Water
June 20, 2023
Water Supply Update
June 20, 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 324,500 360,360 35,860 90.0% 99.1%
Cherry 235,500 273,345 37,845 86.2% -
Eleanor 24,570 27,100 2,530 90.7% -
Water Bank 570,000 570,000 0 100.0% 95.0%
Total Tuolumne Storage 1,154,570 1,230,805 76,235 93.8% - Local System
Calaveras 94,706 96,670 1,964 98.0% -
San Antonio 52,917 53,266 349 99.3% -
Crystal Springs 54,518 68,953 14,435 79.1% -
San Andreas 16,485 18,572 2,087 88.8% -
Pilarcitos 2,705 3,125 420 86.6% -
Total Local Storage 221,331 240,586 19,255 92.0% -
Total System Storage 1,375,901 1,471,391 95,490 93.5% 87.9% Total without water bank 805,901 901,391 95,490 89.4% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
June 19, 2023
Avg Annual Total: 36.68 inches
YTD Total: 60.52 inches
Bay Area 7-station Precipitation Index
as of June 19, 2023
Avg Annual Total: 22.80 inches
YTD Total: 44.21 inches
Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
National Precipitation Forecast
Total Deliveries