1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
March 18, 2024
March 18, 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 306,400 360,360 53,960 85.0% 61.9%
Cherry 237,500 273,345 35,845 86.9% -
Eleanor 23,670 27,100 3,430 87.3% -
Water Bank 570,000 570,000 0 100.0% 99.0%
Total Tuolumne Storage 1,137,570 1,230,805 93,235 92.4% - Local System
Calaveras 91,459 96,670 5,211 94.6% -
San Antonio 50,072 53,266 3,194 94.0% -
Crystal Springs 43,665 68,953 25,288 63.3% -
San Andreas 14,331 18,675 4,344 76.7% -
Pilarcitos 2,551 3,125 574 81.6% -
Total Local Storage 202,078 240,689 38,611 84.0% -
Total System Storage 1,339,648 1,471,494 131,846 91.0% 80.0% Total without water bank 769,648 901,494 131,846 85.4% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
March 17, 2024
Avg Annual Total: 36.68 inches
YTD Total: 24.10 inches
6 Bay Area 7-station Precipitation Index
as of March 17, 2024
Avg Annual Total: 22.80 inches
YTD Total: 24.04 inches
7 Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
11 National Precipitation Forecast
Total Deliveries