1 Drought Update
Steven R. Ritchie
Assistant General Manager, Water
January 3, 2022
January 3, 2022 Reservoir Storage
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 275,300 340,830 65,530 80.8% 70.4%
Cherry 246,000 268,800 22,800 91.5% -
Eleanor 23,290 21,495 0 100.0% -
Water Bank 348,682 570,000 221,318 61.2% 98.7%
Total Tuolumne Storage 893,272 1,201,125 309,648 74.4% - Local System
Calaveras 68,732 96,670 27,938 71.1% -
San Antonio 51,336 53,266 1,930 96.4% -
Crystal Springs 55,948 58,309 2,361 96.0% -
San Andreas 17,180 19,027 1,847 90.3% -
Pilarcitos 3,126 3,030 0 100.0% -
Total Local Storage 196,322 230,302 34,076 85.2% -
Total System Storage 1,089,594 1,431,427 343,724 76.1% 81.2% Total without water bank 740,912 861,427 122,406 86.0% -
Hetch Hetchy is 28% above last year
Cherry is 27% above last year
Eleanor is 209% above last year
Other
California
Reservoirs
California Drought Monitor
Hetch Hetchy Precipitation
5 Upcountry Snowpack
Water Available to the City
Tuolumne River Water Available
to the City
Upcountry 6-station Precipitation Index as of
January 02, 2022
Avg Annual Total: 36.68 inches
YTD Total: 18.61 inches
(51% of Avg Annual Total)
Bay Area 7-station Precipitation Index
as of January 02, 2022
Avg Annual Total: 22.80 inches
YTD Total: 19.14 inches
(84% of Avg Annual Total)
National Precipitation Forecast
Total Deliveries
Regional Water System Water Use Reductions
From FY19/20
For the Period July 1 - December 31 (From Weekly Delivery Reports) CUSTOMER GROUPS FY19/20 AVG.
MGD
FY21/22 AVG.
MGD % REDUCTION
San Francisco Customers 64.9 55.2 14.9%
Wholesale Customers* 145.2 135.3 6.8%
TOTAL 210.1 190.5 9.3%
*Data are for Regional Water System Deliveries only and do not include reductions in other sources of supply.