1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
August 19, 2024
August 19, 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 328,900 360,360 31,460 91.3% 91.2%
Cherry 249,500 273,345 23,845 91.3% -
Eleanor 25,130 27,100 1,970 92.7% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,173,530 1,230,805 57,275 95.3% - Local System
Calaveras 89,736 96,670 6,934 92.8% -
San Antonio 49,509 53,266 3,757 92.9% -
Crystal Springs 52,130 68,953 16,823 75.6% -
San Andreas 11,637 18,675 7,038 62.3% -
Pilarcitos 2,314 3,125 811 74.0% -
Total Local Storage 205,326 240,689 35,363 85.3% -
Total System Storage 1,378,856 1,471,494 92,638 93.7% 85.7% Total without water bank 808,856 901,494 92,638 89.7% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
August 18, 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 18, 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