1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
June 17, 2024
June 17, 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 357,300 360,360 3,060 99.2% 99.2%
Cherry 269,700 273,345 3,645 98.7% -
Eleanor 26,620 27,100 480 98.2% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,223,620 1,230,805 7,185 99.4% - Local System
Calaveras 94,215 96,670 2,455 97.5% -
San Antonio 50,716 53,266 2,550 95.2% -
Crystal Springs 51,820 68,953 17,133 75.2% -
San Andreas 11,359 18,675 7,316 60.8% -
Pilarcitos 2,321 3,125 804 74.3% -
Total Local Storage 210,431 240,689 30,258 87.4% -
Total System Storage 1,434,051 1,471,494 37,443 97.5% 86.6% Total without water bank 864,051 901,494 37,443 95.8% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
June 16, 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 16, 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