1 Drought Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
February 6, 2023
February 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 301,700 360,360 58,660 83.7% 68.0%
Cherry 225,000 273,345 48,345 82.3% -
Eleanor 19,540 27,100 7,560 72.1% -
Water Bank 563,258 570,000 6,742 98.8% 98.5%
Total Tuolumne Storage 1,109,498 1,230,805 121,307 90.1% - Local System
Calaveras 92,806 96,670 3,864 96.0% -
San Antonio 52,947 53,266 319 99.4% -
Crystal Springs 59,933 68,953 9,020 86.9% -
San Andreas 16,026 19,027 3,001 84.2% -
Pilarcitos 2,602 3,030 428 85.9% -
Total Local Storage 224,314 240,946 16,632 93.1% -
Total System Storage 1,333,812 1,471,751 137,939 90.6% 80.1% Total without water bank 770,554 901,751 131,197 85.5% -
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
February 5, 2023
Avg Annual Total: 36.68 inches
YTD Total: 37.41 inches
Bay Area 7-station Precipitation Index
as of February 5, 2023
Avg Annual Total: 22.80 inches
YTD Total: 29.45 inches
Upcountry Snowpack
Tuolumne River Water Available to the City
Tuolumne River Water Available to the City
National Precipitation Forecast
Total Deliveries