1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
January 16, 2024
January 16, 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 304,200 360,360 56,160 84.4% 67.8%
Cherry 253,400 273,345 19,945 92.7% -
Eleanor 23,400 27,100 3,700 86.3% -
Water Bank 559,376 570,000 10,624 98.1% 97.7%
Total Tuolumne Storage 1,140,376 1,230,805 90,429 92.7% - Local System
Calaveras 79,636 96,670 17,034 82.4% -
San Antonio 45,581 53,266 7,685 85.6% -
Crystal Springs 43,731 68,953 25,222 63.4% -
San Andreas 15,583 18,675 3,092 83.4% -
Pilarcitos 2,664 3,125 461 85.2% -
Total Local Storage 187,195 240,689 53,494 77.8% -
Total System Storage 1,327,571 1,471,494 143,923 90.2% 79.7% Total without water bank 768,195 901,494 133,299 85.2% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
January 15, 2024
Avg Annual Total: 36.68 inches
YTD Total: 7.85 inches
6 Bay Area 7-station Precipitation Index
as of January 15, 2024
Avg Annual Total: 22.80 inches
YTD Total: 9.93 inches
7 Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries