Reservoir Storage Levels
Current Reservoir Storage
An acre foot is the volume of
one acre of surface area (150 by
290 feet — 10 feet shorter than
a football field) to a depth of one
foot, also equal to approximately
325,851 gallons.
On average, 1 acre foot of water
is enough to meet the demands
of 4 people for a year. Tuolumne
System storage includes Hetch
Hetchy, Cherry (Lloyd), and
Eleanor Reservoirs.
Local system includes Crystal
Springs, Calaveras, San
Antonio, San Andreas, and
Pilarcitos Reservoirs.
San Francisco Water
As of midnight on:
Current
Reservoir
Tuolumne System
Hetch Hetchy
Cherry
Eleanor
Water Bank
Total Tuolumne Storage
Local System
Calaveras
San Antonio
Crystal Springs
San Andreas
Pilarcitos
Total Local Storage
Total System Storage
Total without water bank
Storage 1,2,3
(AF)
27-May-2019
Normal
Percent
of
Percent of
Maximum Available Maximum Maximum
Storage 5
Storage
Storage 3,4 Capacity
(AF)
(AF)
360,360
273,500
27,113
570,000
1,230,973 120,950
48,550
3,453
0
172,953 66.4%
82.2%
87.3%
100.0%
85.9% 67,404
47,660
51,205
17,108
2,834
186,211 96,670
50,637
58,309
19,027
3,030
227,673 29,266
2,977
7,104
1,919
196
41,462 69.7%
94.1%
87.8%
89.9%
93.5%
81.8% -
-
-
-
-
-
1,244,231
674,231 1,458,646
888,646 214,415
214,415 85.3%
75.9% 84.5%
-
1 Upcountry storage is average of previous day's storage from USGS website
2 Water bank storage reported by HHWP for 05/27/2019
3 Local data from Daily Water Report
4 Upcountry maximum storage is with flashboards, taken from rating curve
5
80.8%
-
-
94.8%
-
239,410
224,950
23,660
570,000
1,058,020
The ratio of median storage for this day over maximum storage capacity. Median storage for this
day is based on historical storage data from years 1982 - 2014