1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
October 16, 2023
October 16, 2023 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 329,900 360,360 30,460 91.5% 76.1%
Cherry 249,200 273,345 24,145 91.2% -
Eleanor 19,590 27,100 7,510 72.3% -
Water Bank 569,946 570,000 54 100.0% 98.0%
Total Tuolumne Storage 1,168,636 1,230,805 62,169 94.9% - Local System
Calaveras 88,216 96,670 8,454 91.3% -
San Antonio 50,232 53,266 3,034 94.3% -
Crystal Springs 50,705 68,953 18,248 73.5% -
San Andreas 14,609 18,675 4,066 78.2% -
Pilarcitos 2,668 3,125 457 85.4% -
Total Local Storage 206,430 240,689 34,259 85.8% -
Total System Storage 1,375,066 1,471,494 96,428 93.4% 78.6% Total without water bank 805,120 901,494 96,374 89.3% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
October 15, 2023
Avg Annual Total: 36.68 inches
YTD Total: 0.02 inches
6 Bay Area 7-station Precipitation Index
as of October 15, 2023
Avg Annual Total: 22.80 inches
YTD Total: 0.04 inches
7 Water Available to the City
8 National Precipitation Forecast
Total Deliveries
10