1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
May 6, 2024
May 6, 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 313,100 360,360 47,260 86.9% 70.8%
Cherry 254,400 273,345 18,945 93.1% -
Eleanor 23,960 27,100 3,140 88.4% -
Water Bank 570,000 570,000 0 100.0% 95.4%
Total Tuolumne Storage 1,161,460 1,230,805 69,345 94.4% - Local System
Calaveras 94,718 96,670 1,952 98.0% -
San Antonio 51,229 53,266 2,037 96.2% -
Crystal Springs 48,811 68,953 20,142 70.8% -
San Andreas 13,620 18,675 5,055 72.9% -
Pilarcitos 2,640 3,125 485 84.5% -
Total Local Storage 211,018 240,689 29,671 87.7% -
Total System Storage 1,372,478 1,471,494 99,016 93.3% 82.1% Total without water bank 802,478 901,494 99,016 89.0% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
May 5, 2024
12-Month Median Total: 30.92 inches
Current Year Total: 31.77 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of May 5, 2024
12-Month Median Total: 23.35 inches
Current Year Total: 29.84 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