1 Drought Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
June 21, 2022
June 21, 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 359,800 360,360 560 100.0% 99.0%
Cherry 266,500 273,345 6,845 97.5% -
Eleanor 26,480 27,100 620 97.7% -
Water Bank 230,923 570,000 339,077 40.5% 94.9%
Total Tuolumne Storage 883,703 1,230,805 347,102 71.8% - Local System
Calaveras 61,459 96,670 35,211 63.6% -
San Antonio 47,342 53,266 5,924 88.9% -
Crystal Springs 50,693 58,309 7,616 86.9% -
San Andreas 13,297 19,027 5,730 69.9% -
Pilarcitos 2,767 3,030 263 91.3% -
Total Local Storage 175,558 230,302 54,744 76.2% -
Total System Storage 1,059,261 1,461,107 401,846 72.5% 88.8% Total without water bank 828,338 891,107 62,769 93.0% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
Monthly Hetch Hetchy Generation Totals With and
Without Threat of Water Rights Curtailments
Upcountry 6-station Precipitation Index as of
June 20, 2022
Avg Annual Total: 36.68 inches
YTD Total: 23.62 inches
Bay Area 7-station Precipitation Index
as of June 20, 2022
Avg Annual Total: 22.80 inches
YTD Total: 23.46 inches
National Precipitation Forecast
Total Deliveries