Don Pedro Res — storage

Storage now, against this reservoir's own record

2,061.79 Mm³

Stored, August 2026

77th

Percentile among 96 Augs on record

+9.5%

Against the Aug 1991–2020 average

-1.3%

Change over the 12 months to 2026-08

Storage in August 2026 was higher than most Augs on record, ranked against 96 other Augs held for this reservoir.

Storage, 1930–2026

Monthly mean storage

1,151 monthly values, 1930 to 2026

Monthly means of the publisher's daily record. Volume, not percentage of capacity: without a capacity whose definition is stated, fullness cannot be computed.

View the data behind this chart

Underlying data
Period	Don Pedro Res Nr La Grange CA (Mm³)
October 1930	94.0
November 1930	78.6
December 1930	63.7
January 1931	63.5
February 1931	69.1
March 1931	67.0
April 1931	62.8
May 1931	95.0
June 1931	87.8
July 1931	70.9
August 1931	50.2
September 1931	47.7
October 1931	45.5
November 1931	45.2
December 1931	54.1
January 1932	151
February 1932	214
March 1932	234
April 1932	257
May 1932	252
June 1932	313
July 1932	349
August 1932	310
September 1932	253
October 1932	181
November 1932	123
December 1932	125
January 1933	146
February 1933	162
March 1933	180
April 1933	183
May 1933	196
June 1933	329
July 1933	340
August 1933	277
September 1933	199
October 1933	119
November 1933	98.3
December 1933	99.5
January 1934	117
February 1934	156
March 1934	235
April 1934	262
May 1934	263
June 1934	230
July 1934	146
August 1934	63.6
September 1934	37.9
October 1934	42.4
November 1934	53.7
December 1934	64.4
January 1935	98.6
February 1935	172
March 1935	253
April 1935	326
May 1935	328
June 1935	334
July 1935	351
August 1935	280
September 1935	185
October 1935	120
November 1935	108
December 1935	87.2
January 1936	121
February 1936	251
March 1936	286
April 1936	291
May 1936	322
June 1936	342
July 1936	349
August 1936	281
September 1936	191
October 1936	135
November 1936	110
December 1936	71.8
January 1937	81.8
February 1937	221
March 1937	297
April 1937	301
May 1937	315
June 1937	345
July 1937	325
August 1937	258
September 1937	167
October 1937	101
November 1937	83.2
December 1937	208
January 1938	305
February 1938	320
March 1938	327
April 1938	306
May 1938	304
June 1938	336
July 1938	358
August 1938	336
September 1938	275
October 1938	213
November 1938	163
December 1938	153
January 1939	175
February 1939	210
March 1939	230
April 1939	322
May 1939	350
June 1939	314
July 1939	236
August 1939	164
September 1939	125
October 1939	106
November 1939	95.4
December 1939	92.1
January 1940	182
February 1940	320
March 1940	329
April 1940	329
May 1940	330
June 1940	342
July 1940	337
August 1940	260
September 1940	173
October 1940	121
November 1940	91.3
December 1940	84.3
January 1941	190
February 1941	295
March 1941	328
April 1941	328
May 1941	332
June 1941	336
July 1941	354
August 1941	309
September 1941	235
October 1941	151
November 1941	121
December 1941	145
January 1942	166
February 1942	280
March 1942	264
April 1942	300
May 1942	330
June 1942	337
July 1942	354
August 1942	301
September 1942	209
October 1942	120
November 1942	107
December 1942	99.1
January 1943	164
February 1943	327
March 1943	330
April 1943	329
May 1943	331
June 1943	335
July 1943	352
August 1943	288
September 1943	187
October 1943	99.7
November 1943	70.3
December 1943	65.3
January 1944	84.6
February 1944	141
March 1944	231
April 1944	235
May 1944	306
June 1944	332
July 1944	328
August 1944	232
September 1944	139
October 1944	78.2
November 1944	85.0
December 1944	97.0
January 1945	128
February 1945	317
March 1945	326
April 1945	328
May 1945	326
June 1945	339
July 1945	348
August 1945	265
September 1945	169
October 1945	99.2
November 1945	120
December 1945	156
January 1946	258
February 1946	253
March 1946	295
April 1946	327
May 1946	332
June 1946	346
July 1946	306
August 1946	197
September 1946	153
October 1946	109
November 1946	83.9
December 1946	91.8
January 1947	108
February 1947	154
March 1947	246
April 1947	298
May 1947	283
June 1947	259
July 1947	233
August 1947	143
September 1947	68.2
October 1947	66.3
November 1947	82.3
December 1947	63.7
January 1948	69.3
February 1948	91.7
March 1948	118
April 1948	241
May 1948	325
June 1948	347
July 1948	327
August 1948	211
September 1948	94.3
October 1948	49.3
November 1948	50.6
December 1948	47.5
January 1949	57.1
February 1949	94.3
March 1949	192
April 1949	214
May 1949	275
June 1949	344
July 1949	284
August 1949	179
September 1949	112
October 1949	73.0
November 1949	68.6
December 1949	62.6
January 1950	86.6
February 1950	188
March 1950	213
April 1950	233
May 1950	250
June 1950	315
July 1950	328
August 1950	243
September 1950	149
October 1950	95.8
November 1950	189
December 1950	279
January 1951	237
February 1951	236
March 1951	238
April 1951	281
May 1951	337
June 1951	356
July 1951	327
August 1951	244
September 1951	159
October 1951	106
November 1951	107
December 1951	126
January 1952	194
February 1952	229
March 1952	234
April 1952	223
May 1952	217
June 1952	222
July 1952	329
August 1952	329
September 1952	268
October 1952	221
November 1952	188
December 1952	157
January 1953	166
February 1953	185
March 1953	186
April 1953	224
May 1953	316
June 1953	345
July 1953	353
August 1953	277
September 1953	187
October 1953	118
November 1953	109
December 1953	124
January 1954	140
February 1954	201
March 1954	247
April 1954	268
May 1954	301
June 1954	345
July 1954	295
August 1954	184
September 1954	101
October 1954	61.3
November 1954	76.4
December 1954	103
January 1955	134
February 1955	140
March 1955	162
April 1955	123
May 1955	232
June 1955	310
July 1955	259
August 1955	176
September 1955	86.0
October 1955	65.1
November 1955	77.9
December 1955	166
January 1956	263
February 1956	237
March 1956	227
April 1956	224
May 1956	246
June 1956	281
July 1956	344
August 1956	330
September 1956	223
October 1956	177
November 1956	162
December 1956	113
January 1957	102
February 1957	145
March 1957	259
April 1957	240
May 1957	261
June 1957	323
July 1957	323
August 1957	324
September 1957	251
October 1957	193
November 1957	154
December 1957	107
January 1958	95.8
February 1958	180
March 1958	235
April 1958	232
May 1958	238
June 1958	319
July 1958	356
August 1958	330
September 1958	327
October 1958	321
November 1958	236
December 1958	145
January 1959	155
February 1959	200
March 1959	235
April 1959	240
May 1959	252
June 1959	245
July 1959	224
August 1959	161
September 1959	96.5
October 1959	82.5
November 1959	74.5
December 1959	60.3
January 1960	59.3
February 1960	129
March 1960	183
April 1960	165
May 1960	219
June 1960	215
July 1960	157
August 1960	76.9
September 1960	51.4
October 1960	65.7
November 1960	81.2
December 1960	89.6
January 1961	98.9
February 1961	147
March 1961	184
April 1961	188
May 1961	159
June 1961	154
July 1961	137
August 1961	111
September 1961	71.4
October 1961	58.4
November 1961	54.8
December 1961	50.6
January 1962	43.4
February 1962	146
March 1962	217
April 1962	208
May 1962	188
June 1962	238
July 1962	321
August 1962	210
September 1962	126
October 1962	102
November 1962	105
December 1962	93.6
January 1963	108
February 1963	240
March 1963	263
April 1963	266
May 1963	297
June 1963	347
July 1963	350
August 1963	284
September 1963	224
October 1963	197
November 1963	146
December 1963	87.2
January 1964	94.9
February 1964	179
March 1964	236
April 1964	261
May 1964	300
June 1964	307
July 1964	253
August 1964	186
September 1964	146
October 1964	107
November 1964	102
December 1964	148
January 1965	203
February 1965	232
March 1965	236
April 1965	249
May 1965	320
June 1965	356
July 1965	352
August 1965	324
September 1965	260
October 1965	161
November 1965	122
December 1965	107
January 1966	126
February 1966	172
March 1966	187
April 1966	197
May 1966	218
June 1966	260
July 1966	224
August 1966	154
September 1966	113
October 1966	108
November 1966	111
December 1966	127
January 1967	118
February 1967	204
March 1967	229
April 1967	224
May 1967	220
June 1967	289
July 1967	346
August 1967	329
September 1967	243
October 1967	182
November 1967	141
December 1967	95.2
January 1968	119
February 1968	202
March 1968	239
April 1968	248
May 1968	205
June 1968	209
July 1968	169
August 1968	111
September 1968	103
October 1968	105
November 1968	103
December 1968	94.3
January 1969	184
February 1969	245
March 1969	211
April 1969	211
May 1969	230
June 1969	297
July 1969	351
August 1969	308
September 1969	195
October 1969	103
November 1969	84.6
December 1969	81.2
January 1970	168
February 1970	213
March 1970	221
April 1970	224
May 1970	259
June 1970	348
July 1970	334
August 1970	244
September 1970	151
October 1970	148
November 1970	236
December 1970	340
January 1971	358
February 1971	377
March 1971	395
April 1971	446
May 1971	486
June 1971	526
July 1971	575
August 1971	490
September 1971	443
October 1971	428
November 1971	446
December 1971	496
January 1972	591
February 1972	675
March 1972	702
April 1972	657
May 1972	684
June 1972	658
July 1972	587
August 1972	494
September 1972	453
October 1972	429
November 1972	430
December 1972	468
January 1973	584
February 1973	766
March 1973	975
April 1973	1,138
May 1973	1,235
June 1973	1,410
July 1973	1,380
August 1973	1,237
September 1973	1,148
October 1973	1,113
November 1973	1,159
December 1973	1,257
January 1974	1,389
February 1974	1,482
March 1974	1,606
April 1974	1,761
May 1974	1,891
June 1974	2,137
July 1974	2,177
August 1974	2,027
September 1974	1,878
October 1974	1,764
November 1974	1,701
December 1974	1,653
January 1975	1,589
February 1975	1,626
March 1975	1,740
April 1975	1,859
May 1975	1,953
June 1975	2,178
July 1975	2,239
August 1975	2,105
September 1975	2,017
October 1975	1,930
November 1975	1,874
December 1975	1,815
January 1976	1,747
February 1976	1,670
March 1976	1,623
April 1976	1,498
May 1976	1,398
June 1976	1,296
July 1976	1,132
August 1976	955
September 1976	871
October 1976	832
November 1976	816
December 1976	794
January 1977	774
February 1977	760
March 1977	737
April 1977	684
May 1977	652
June 1977	611
July 1977	522
August 1977	428
September 1977	380
October 1977	375
November 1977	386
December 1977	415
January 1978	564
February 1978	812
March 1978	1,126
April 1978	1,373
May 1978	1,504
June 1978	1,813
July 1978	2,045
August 1978	1,988
September 1978	1,937
October 1978	1,926
November 1978	1,901
December 1978	1,869
January 1979	1,888
February 1979	1,892
March 1979	1,958
April 1979	1,998
May 1979	2,112
June 1979	2,311
July 1979	2,246
August 1979	2,089
September 1979	1,998
October 1979	1,945
November 1979	1,933
December 1979	1,945
January 1980	2,081
February 1980	2,094
March 1980	2,078
April 1980	1,967
May 1980	2,042
June 1980	2,167
July 1980	2,363
August 1980	2,339
September 1980	2,210
October 1980	2,083
November 1980	2,024
December 1980	1,948
January 1981	1,863
February 1981	1,840
March 1981	1,826
April 1981	1,827
May 1981	1,813
June 1981	1,761
July 1981	1,627
August 1981	1,486
September 1981	1,393
October 1981	1,378
November 1981	1,419
December 1981	1,503
January 1982	1,758
February 1982	1,927
March 1982	2,074
April 1982	2,193
May 1982	2,153
June 1982	2,337
July 1982	2,478
August 1982	2,395
September 1982	2,241
October 1982	2,059
November 1982	2,051
December 1982	2,066
January 1983	2,028
February 1983	2,117
March 1983	2,283
April 1983	2,195
May 1983	1,904
June 1983	1,991
July 1983	2,426
August 1983	2,469
September 1983	2,238
October 1983	1,987
November 1983	1,942
December 1983	2,100
January 1984	2,068
February 1984	1,935
March 1984	1,821
April 1984	1,746
May 1984	1,843
June 1984	2,095
July 1984	2,099
August 1984	1,959
September 1984	1,878
October 1984	1,854
November 1984	1,864
December 1984	1,854
January 1985	1,841
February 1985	1,872
March 1985	1,895
April 1985	1,917
May 1985	1,916
June 1985	1,851
July 1985	1,710
August 1985	1,572
September 1985	1,505
October 1985	1,480
November 1985	1,480
December 1985	1,502
January 1986	1,562
February 1986	1,835
March 1986	2,167
April 1986	1,999
May 1986	2,044
June 1986	2,228
July 1986	2,267
August 1986	2,157
September 1986	2,079
October 1986	2,016
November 1986	1,980
December 1986	1,918
January 1987	1,874
February 1987	1,877
March 1987	1,886
April 1987	1,829
May 1987	1,711
June 1987	1,588
July 1987	1,457
August 1987	1,296
September 1987	1,182
October 1987	1,132
November 1987	1,100
December 1987	1,078
January 1988	1,116
February 1988	1,192
March 1988	1,190
April 1988	1,126
May 1988	1,173
June 1988	1,215
July 1988	1,210
August 1988	1,148
September 1988	1,131
October 1988	1,169
November 1988	1,205
December 1988	1,241
January 1989	1,283
February 1989	1,328
March 1989	1,414
April 1989	1,458
May 1989	1,481
June 1989	1,568
July 1989	1,509
August 1989	1,375
September 1989	1,321
October 1989	1,337
November 1989	1,380
December 1989	1,419
January 1990	1,467
February 1990	1,525
March 1990	1,595
April 1990	1,588
May 1990	1,556
June 1990	1,534
July 1990	1,423
August 1990	1,280
September 1990	1,223
October 1990	1,204
November 1990	1,227
December 1990	1,256
January 1991	1,258
February 1991	1,228
March 1991	1,265
April 1991	1,349
May 1991	1,356
June 1991	1,398
July 1991	1,352
August 1991	1,240
September 1991	1,176
October 1991	1,153
November 1991	1,165
December 1991	1,191
January 1992	1,224
February 1992	1,276
March 1992	1,385
April 1992	1,443
May 1992	1,400
June 1992	1,312
July 1992	1,187
August 1992	1,052
September 1992	975
October 1992	936
November 1992	929
December 1992	970
January 1993	1,165
February 1993	1,408
March 1993	1,645
April 1993	1,918
May 1993	2,047
June 1993	2,338
July 1993	2,448
August 1993	2,316
September 1993	2,145
October 1993	2,026
November 1993	1,979
December 1993	1,970
January 1994	1,945
February 1994	1,951
March 1994	2,004
April 1994	1,989
May 1994	2,022
June 1994	2,007
July 1994	1,864
August 1994	1,703
September 1994	1,597
October 1994	1,556
November 1994	1,582
December 1994	1,685
January 1995	1,909
February 1995	2,026
March 1995	2,183
April 1995	2,124
May 1995	2,140
June 1995	2,161
July 1995	2,427
August 1995	2,464
September 1995	2,288
October 1995	2,079
November 1995	1,991
December 1995	1,995
January 1996	2,034
February 1996	2,120
March 1996	2,136
April 1996	2,111
May 1996	2,206
June 1996	2,366
July 1996	2,382
August 1996	2,228
September 1996	2,117
October 1996	2,037
November 1996	2,024
December 1996	2,132
January 1997	2,281
February 1997	2,167
March 1997	1,933
April 1997	1,992
May 1997	2,074
June 1997	2,266
July 1997	2,222
August 1997	2,077
September 1997	1,979
October 1997	1,928
November 1997	1,900
December 1997	1,898
January 1998	1,963
February 1998	2,083
March 1998	2,009
April 1998	2,016
May 1998	2,080
June 1998	2,231
July 1998	2,457
August 1998	2,392
September 1998	2,199
October 1998	2,053
November 1998	2,024
December 1998	2,041
January 1999	2,027
February 1999	2,063
March 1999	2,035
April 1999	2,046
May 1999	2,079
June 1999	2,320
July 1999	2,380
August 1999	2,199
September 1999	2,065
October 1999	1,987
November 1999	1,930
December 1999	1,901
January 2000	1,894
February 2000	2,040
March 2000	2,118
April 2000	2,132
May 2000	2,249
June 2000	2,419
July 2000	2,395
August 2000	2,234
September 2000	2,120
October 2000	2,059
November 2000	2,034
December 2000	2,021
January 2001	2,010
February 2001	2,043
March 2001	2,061
April 2001	2,049
May 2001	2,060
June 2001	1,964
July 2001	1,793
August 2001	1,628
September 2001	1,510
October 2001	1,445
November 2001	1,413
December 2001	1,473
January 2002	1,664
February 2002	1,765
March 2002	1,843
April 2002	1,890
May 2002	1,919
June 2002	1,950
July 2002	1,843
August 2002	1,685
September 2002	1,580
October 2002	1,519
November 2002	1,521
December 2002	1,562
January 2003	1,648
February 2003	1,725
March 2003	1,752
April 2003	1,805
May 2003	1,952
June 2003	2,244
July 2003	2,188
August 2003	2,007
September 2003	1,897
October 2003	1,819
November 2003	1,781
December 2003	1,800
January 2004	1,869
February 2004	1,935
March 2004	2,049
April 2004	2,078
May 2004	2,068
June 2004	2,106
July 2004	1,974
August 2004	1,796
September 2004	1,671
October 2004	1,603
November 2004	1,610
December 2004	1,659
January 2005	1,839
February 2005	1,988
March 2005	2,070
April 2005	2,046
May 2005	2,128
June 2005	2,411
July 2005	2,468
August 2005	2,275
September 2005	2,111
October 2005	2,041
November 2005	2,006
December 2005	2,017
January 2006	2,093
February 2006	2,026
March 2006	2,057
April 2006	2,240
May 2006	2,302
June 2006	2,437
July 2006	2,451
August 2006	2,279
September 2006	2,112
October 2006	2,022
November 2006	1,977
December 2006	1,970
January 2007	1,988
February 2007	1,993
March 2007	2,036
April 2007	2,004
May 2007	1,981
June 2007	1,945
July 2007	1,801
August 2007	1,658
September 2007	1,574
October 2007	1,542
November 2007	1,517
December 2007	1,507
January 2008	1,546
February 2008	1,635
March 2008	1,700
April 2008	1,693
May 2008	1,682
June 2008	1,664
July 2008	1,585
August 2008	1,433
September 2008	1,330
October 2008	1,278
November 2008	1,273
December 2008	1,278
January 2009	1,316
February 2009	1,405
March 2009	1,604
April 2009	1,705
May 2009	1,948
June 2009	2,171
July 2009	2,093
August 2009	1,929
September 2009	1,814
October 2009	1,757
November 2009	1,739
December 2009	1,748
January 2010	1,788
February 2010	1,868
March 2010	1,987
April 2010	2,087
May 2010	2,252
June 2010	2,419
July 2010	2,430
August 2010	2,246
September 2010	2,098
October 2010	2,017
November 2010	2,037
December 2010	2,054
January 2011	2,058
February 2011	2,022
March 2011	2,069
April 2011	2,042
May 2011	2,008
June 2011	2,224
July 2011	2,466
August 2011	2,348
September 2011	2,078
October 2011	1,979
November 2011	1,945
December 2011	1,948
January 2012	1,911
February 2012	1,872
March 2012	1,859
April 2012	1,943
May 2012	2,063
June 2012	2,015
July 2012	1,851
August 2012	1,676
September 2012	1,554
October 2012	1,478
November 2012	1,460
December 2012	1,561
January 2013	1,664
February 2013	1,716
March 2013	1,715
April 2013	1,792
May 2013	1,818
June 2013	1,774
July 2013	1,624
August 2013	1,466
September 2013	1,358
October 2013	1,286
November 2013	1,263
December 2013	1,270
January 2014	1,280
February 2014	1,295
March 2014	1,326
April 2014	1,339
May 2014	1,337
June 2014	1,288
July 2014	1,171
August 2014	1,052
September 2014	981
October 2014	940
November 2014	937
December 2014	958
January 2015	999
February 2015	1,052
March 2015	1,088
April 2015	1,061
May 2015	1,028
June 2015	980
July 2015	891
August 2015	824
September 2015	796
October 2015	782
November 2015	794
December 2015	824
January 2016	929
February 2016	1,089
March 2016	1,351
April 2016	1,602
May 2016	1,804
June 2016	1,919
July 2016	1,866
August 2016	1,736
September 2016	1,652
October 2016	1,618
November 2016	1,655
December 2016	1,769
January 2017	2,142
February 2017	2,388
March 2017	2,307
April 2017	2,089
May 2017	2,072
June 2017	2,342
July 2017	2,468
August 2017	2,350
September 2017	2,138
October 2017	2,042
November 2017	1,975
December 2017	2,020
January 2018	2,044
February 2018	2,067
March 2018	2,117
April 2018	2,248
May 2018	2,340
June 2018	2,326
July 2018	2,188
August 2018	2,024
September 2018	1,905
October 2018	1,805
November 2018	1,713
December 2018	1,749
January 2019	1,797
February 2019	1,986
March 2019	2,072
April 2019	2,021
May 2019	2,228
June 2019	2,365
July 2019	2,450
August 2019	2,336
September 2019	2,138
October 2019	2,044
November 2019	1,968
December 2019	1,992
January 2020	2,004
February 2020	2,018
March 2020	2,013
April 2020	2,075
May 2020	2,140
June 2020	2,140
July 2020	2,001
August 2020	1,859
September 2020	1,782
October 2020	1,723
November 2020	1,683
December 2020	1,682
January 2021	1,688
February 2021	1,726
March 2021	1,748
April 2021	1,734
May 2021	1,686
June 2021	1,597
July 2021	1,482
August 2021	1,368
September 2021	1,283
October 2021	1,220
November 2021	1,242
December 2021	1,279
January 2022	1,374
February 2022	1,434
March 2022	1,493
April 2022	1,562
May 2022	1,630
June 2022	1,657
July 2022	1,552
August 2022	1,431
September 2022	1,338
October 2022	1,265
November 2022	1,239
December 2022	1,299
January 2023	1,772
February 2023	1,881
March 2023	2,097
April 2023	2,019
May 2023	1,868
June 2023	2,067
July 2023	2,369
August 2023	2,317
September 2023	2,171
October 2023	2,067
November 2023	2,012
December 2023	2,007
January 2024	2,006
February 2024	2,049
March 2024	2,072
April 2024	2,106
May 2024	2,266
June 2024	2,389
July 2024	2,251
August 2024	2,069
September 2024	1,937
October 2024	1,809
November 2024	1,734
December 2024	1,724
January 2025	1,720
February 2025	1,807
March 2025	1,961
April 2025	2,163
May 2025	2,288
June 2025	2,386
July 2025	2,251
August 2025	2,088
September 2025	1,970
October 2025	1,898
November 2025	1,892
December 2025	1,918
January 2026	2,023
February 2026	2,099
March 2026	2,128
April 2026	2,209
May 2026	2,354
June 2026	2,356
July 2026	2,209
August 2026	2,062

The reservoir's year

Seasonal storage profile

Each calendar month's reference average, against the most recent year

1991–2020 average
Most recent 12 months

Twelve separate averages, one per calendar month. A January average describes Januaries only. Months are plotted 1–12.

View the data behind this chart

Underlying data
Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	1,743	2,023
Feb	1,808	2,099
Mar	1,860	2,128
Apr	1,898	2,209
May	1,959	2,354
Jun	2,050	2,356
Jul	2,024	2,209
Aug	1,884	2,062
Sep	1,758	1,970
Oct	1,685	1,898
Nov	1,661	1,892
Dec	1,688	1,918

Rate and persistence

-2.22 Mm³

Mean drawdown per month over 12 months

0 of 24

Months in the last two years below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Don Pedro Res Nr La Grange CA

Gauge location

Where this comes from

1,151 monthly observations 1930–2026 Mm³

Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 11287500. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 25 August 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.