Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
September ϯ, 2024
1 September 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 312,600 360,360 47,760 86.7% 87.0%
Cherry 243,000 273,345 30,345 88.9% -
Eleanor 24,410 27,100 2,690 90.1% -
Water Bank 570,000 570,000 0 100.0% 100.0%
Total Tuolumne Storage 1,150,010 1,230,805 80,795 93.4% - Local System
Calaveras 89,111 96,670 7,559 92.2% -
San Antonio 49,280 53,266 3,986 92.5% -
Crystal Springs 51,949 68,953 17,004 75.3% -
San Andreas 11,607 18,675 7,068 62.2% -
Pilarcitos 2,324 3,125 801 74.4% -
Total Local Storage 204,271 240,689 36,418 84.9% -
Total System Storage 1,354,281 1,471,494 117,213 92.0% 83.7% Total without water bank 784,281 901,494 117,213 87.0% - Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
September 2, 2024
12-Month Median Total: 30.92 inches
Current Year Total: 32.25 inches
6 Annual Comparison:
Bay Area 7-station Precipitation Index
as of September 2, 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 National Precipitation Forecast
10 Total Deliveries