1 Water Supply Conditions Update
Steven R. Ritchie
Assistant General Manager, Water
April 1, 2024
April 1, 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 292,200 360,360 68,160 81.1% 60.7%
Cherry 241,400 273,345 31,945 88.3% -
Eleanor 22,710 27,100 4,390 83. 8% -
Water Bank 570,000 570,000 0 100.0% 99.8%
Total Tuolumne Storage 1,126,310 1,230,805 104,495 91.5% - Local System
Calaveras 92,703 96,670 3,967 95.9% -
San Antonio 50,522 53,266 2,744 94.8% -
Crystal Springs 45,615 68,953 23,338 66.2% -
San Andreas 13,804 18,675 4,871 73.9% -
Pilarcitos 2,613 3,125 512 83.6% -
Total Local Storage 205,257 240,689 35,432 85.3% -
Total System Storage 1,331,567 1,471,494 139,927 90.5% 80.6% Total without water bank 761,567 901,494 139,927 84.5% -
Other
California
Reservoirs
3 California Drought Monitor
4 Hetch Hetchy Precipitation
5 Upcountry 6-station Precipitation Index as of
March 31, 2024
Avg Annual Total: 36.68 inches
YTD Total: 27.60 inches
6 Bay Area 7-station Precipitation Index
as of March 31, 2024
Avg Annual Total: 22.80 inches
YTD Total: 26.77 inches
7 Upcountry Snowpack
8 Water Available to the City
9 Tuolumne River Water Available
to the City
10 11
National Precipitation Forecast
Total Deliveries