1 Drought Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
September 6, 2022
September 6, 2022 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 301,000 360,360 59,360 83.5% 86.2%
Cherry 237,900 273,345 35,445 87.0% -
Eleanor 23,340 27,100 3,760 86.1% -
Water Bank 252,134 570,000 317,866 44.2% 97.4%
Total Tuolumne Storage 814,374 1,230,805 416,431 66.2% - Local System
Calaveras 58,764 96,670 37,906 60.8% -
San Antonio 45,309 53,266 7,957 85.1% -
Crystal Springs 51,265 58,309 7,044 87.9% -
San Andreas 16,251 19,027 2,776 85.4% -
Pilarcitos 2,418 3,030 612 79.8% -
Total Local Storage 174,007 230,302 56,295 75.6% -
Total System Storage 988,381 1,461,107 472,726 67.6% 84.2% Total without water bank 736,247 891,107 154,860 82.6% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
September 5, 2022
Avg Annual Total: 36.68 inches
YTD Total: 23.79 inches
Bay Area 7-station Precipitation Index
as of September 5, 2022
Avg Annual Total: 22.80 inches
YTD Total: 23.52 inches
Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
National Precipitation Forecast
Total Deliveries
Drought Tracker