1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
January 2, 2024
January 2, 2024 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 303,000 360,360 57,360 84.1% 66.6%
Cherry 253,100 273,345 20,245 92.6% -
Eleanor 22,350 27,100 4,750 82.5% -
Water Bank 558,488 570,000 11,512 98.0% 97.7%
Total Tuolumne Storage 1,136,938 1,230,805 93,867 92.4% - Local System
Calaveras 81,635 96,670 15,035 84.4% -
San Antonio 45,576 53,266 7,690 85.6% -
Crystal Springs 45,415 68,953 23,538 65.9% -
San Andreas 15,560 18,675 3,115 83.3% -
Pilarcitos 2,575 3,125 550 82.4% -
Total Local Storage 190,761 240,689 49,928 79.3% -
Total System Storage 1,327,699 1,471,494 143,795 90.2% 79.0% Total without water bank 769,211 901,494 132,283 85.3% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
January 1, 2024
Avg Annual Total: 36.68 inches
YTD Total: 4.45 inches
6 Bay Area 7-station Precipitation Index
as of January 1, 2024
Avg Annual Total: 22.80 inches
YTD Total: 6.77 inches
7 Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries