1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
December 4, 2023
December 4, 2023 Reservoir Storage
2 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 302,700 360,360 57,660 84.0% 68.0%
Cherry 250,100 273,345 23,245 91.5% -
Eleanor 17,980 27,100 9,120 66.3% -
Water Bank 566,814 570,000 3,186 99.4% 98.5%
Total Tuolumne Storage 1,137,594 1,230,805 93,211 92.4% - Local System
Calaveras 85,217 96,670 11,453 88.2% -
San Antonio 48,824 53,266 4,442 91.7% -
Crystal Springs 48,773 68,953 20,180 70.7% -
San Andreas 15,544 18,675 3,131 83.2% -
Pilarcitos 2,569 3,125 556 82.2% -
Total Local Storage 200,927 240,689 39,762 83.5% -
Total System Storage 1,338,521 1,471,494 132,973 91.0% 78.0% Total without water bank 771,707 901,494 129,787 85.6% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
December 3, 2023
Avg Annual Total: 36.68 inches
YTD Total: 2.21 inches
6 Bay Area 7-station Precipitation Index
as of December 3, 2023
Avg Annual Total: 22.80 inches
YTD Total: 2.31 inches
7 Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries
11