1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
August 5, 2024
August 5, 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 342,200 360,360 18,160 95.0% 94.9%
Cherry 256,200 273,345 17,145 93.7% -
Eleanor 25,840 27,100 1,260 95.4% -
Water Bank 570,000 570,000 0 100.0% 99.8%
Total Tuolumne Storage 1,194,240 1,230,805 36,565 97.0% - Local System
Calaveras 90,401 96,670 6,269 93.5% -
San Antonio 49,802 53,266 3,464 93.5% -
Crystal Springs 52,817 68,953 16,136 76.6% -
San Andreas 11,234 18,675 7,441 60.2% -
Pilarcitos 2,315 3,125 810 74.1% -
Total Local Storage 206,569 240,689 34,120 85.8% -
Total System Storage 1,400,809 1,471,494 70,685 95.2% 87.3% Total without water bank 830,809 901,494 70,685 92.2% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
August 4, 2024
12-Month Median Total: 30.92 inches
Current Year Total: 32.24 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of August 4, 2024
12-Month Median Total: 23.35 inches
Current Year Total: 29.88 inches
7 Annual Comparison:
Upcountry Snowpack
8 Water Available to the City
9 10
National Precipitation Forecast
Total Deliveries