1 Drought Update
Steven R. Ritchie
Assistant General Manager, Water
April 18, 2022
April 18, 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 320,600 360,360 39,760 89.0% 61.2%
Cherry 249,200 273,345 24,145 91.2% -
Eleanor 25,810 27,100 1,290 95.2% -
Water Bank 327,367 570,000 242,633 57.4% 98.4%
Total Tuolumne Storage 922,977 1,230,805 307,828 75.0% - Local System
Calaveras 63,248 96,670 33,422 65.4% -
San Antonio 41,104 53,266 12,162 77.2% -
Crystal Springs 45,900 58,309 12,409 78.7% -
San Andreas 15,494 19,027 3,533 81.4% -
Pilarcitos 2,834 3,030 196 93.5% -
Total Local Storage 168,580 230,302 61,722 73.2% -
Total System Storage 1,091,557 1,461,107 369,550 74.7% 80.5% Total without water bank 764,190 891,107 126,917 85.8% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
Upcountry 6-station Precipitation Index as of
April 17, 2022
Avg Annual Total: 36.68 inches
YTD Total: 21.94 inches
Bay Area 7-station Precipitation Index
as of April 17, 2022
Avg Annual Total: 22.80 inches
YTD Total: 22.39 inches
National Precipitation Forecast
Total Deliveries
Drought Tracker
Water Savings by Season