1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
June 3, 2024
June 3, 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 325,600 360,360 34,760 90.4% 90.6%
Cherry 267,200 273,345 6,145 97.8% -
Eleanor 25,410 27,100 1,690 93.8% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,188,210 1,230,805 42,595 96.5% - Local System
Calaveras 94,627 96,670 2,043 97.9% -
San Antonio 50,915 53,266 2,351 95.6% -
Crystal Springs 51,795 68,953 17,158 75.1% -
San Andreas 11,923 18,675 6,752 63.8% -
Pilarcitos 2,325 3,125 800 74.4% -
Total Local Storage 211,585 240,689 29,104 87.9% -
Total System Storage 1,399,795 1,471,494 71,699 95.1% 83.9% Total without water bank 829,795 901,494 71,699 92.0% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
June 2, 2024
12-Month Median Total: 30.92 inches
Current Year Total: 31.78 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of June 2, 2024
12-Month Median Total: 23.35 inches
Current Year Total: 29.87 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
10 11
National Precipitation Forecast
Total Deliveries