HydrionisGlobal Water Intelligence
Monitored reservoir

Atoka Reservoir Near Stringtown, OK

United States Geological Survey reservoir gauge 07333010 in OK, with published storage from 1999.

Storage record07333010

Storage now, against this reservoir's own record

133.79 Mm³
Stored, August 2026
46th
Percentile among 27 Augs on record
+3.3%
Against the Aug 1991–2020 average
-7.4%
Change over the 12 months to 2026-08

Storage in August 2026 was around the middle of the Aug record, ranked against 27 other Augs held for this reservoir.

Storage, 1999–2026

Monthly mean storage
323 monthly values, 1999 to 2026
Monthly mean storageMonthly mean storage: Atoka Reservoir Near Stringtown, OK in Mm³, from 1999.75 to 2026.5833333333333.050100150200Mm³1999.752003.16666666666672006.583333333333320102013.41666666666672016.83333333333332020.252023.6666666666667Year

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
PeriodAtoka Reservoir Near Stringtown, OK (Mm³)
October 1999128
November 1999122
December 1999118
January 2000113
February 2000108
March 2000106
April 2000105
May 2000112
June 2000118
July 2000128
August 2000122
September 2000111
October 2000103
November 2000113
December 2000129
January 2001150
February 2001161
March 2001159
April 2001157
May 2001154
June 2001155
July 2001148
August 2001138
September 2001135
October 2001138
November 2001136
December 2001142
January 2002150
February 2002154
March 2002156
April 2002161
May 2002153
June 2002151
July 2002147
August 2002139
September 2002130
October 2002121
November 2002115
December 2002108
January 2003111
February 2003104
March 2003105
April 2003107
May 2003108
June 2003111
July 2003114
August 2003112
September 2003111
October 2003104
November 200395.1
December 200385.9
January 200478.6
February 200477.7
March 200479.7
April 200481.5
May 200496.6
June 2004101
July 2004110
August 2004109
September 2004107
October 2004113
November 2004156
December 2004157
January 2005159
February 2005158
March 2005155
April 2005158
May 2005152
June 2005147
July 2005140
August 2005132
September 2005124
October 2005116
November 2005108
December 200599.7
January 200692.4
February 200685.9
March 200681.7
April 200682.6
May 2006117
June 2006113
July 2006102
August 200694.9
September 200693.9
October 200694.5
November 2006101
December 2006120
January 2007155
February 2007156
March 2007152
April 2007152
May 2007158
June 2007158
July 2007160
August 2007154
September 2007153
October 2007146
November 2007139
December 2007134
January 2008128
February 2008126
March 2008149
April 2008161
May 2008153
June 2008150
July 2008142
August 2008133
September 2008129
October 2008121
November 2008113
December 2008105
January 200997.9
February 200994.0
March 200987.5
April 200982.8
May 2009134
June 2009156
July 2009150
August 2009148
September 2009146
October 2009160
November 2009156
December 2009152
January 2010156
February 2010160
March 2010160
April 2010158
May 2010160
June 2010156
July 2010157
August 2010148
September 2010141
October 2010134
November 2010132
December 2010131
January 2011132
February 2011133
March 2011130
April 2011125
May 2011145
June 2011141
July 2011129
August 2011117
September 2011109
October 2011104
November 2011101
December 201198.9
January 2012102
February 2012120
March 2012128
April 2012141
May 2012133
June 2012124
July 2012114
August 2012107
September 2012101
October 201295.8
November 201290.4
December 201284.9
January 201379.8
February 201376.4
March 201373.6
April 201385.5
May 2013108
June 2013156
July 2013143
August 2013131
September 2013118
October 2013106
November 201397.4
December 201394.1
January 201491.9
February 201488.0
March 201488.1
April 201492.7
May 201496.4
June 2014109
July 2014112
August 2014112
September 2014108
October 2014107
November 2014104
December 2014103
January 2015102
February 2015101
March 2015113
April 2015131
May 2015164
June 2015161
July 2015158
August 2015154
September 2015152
October 2015151
November 2015158
December 2015163
January 2016158
February 2016156
March 2016159
April 2016156
May 2016160
June 2016159
July 2016149
August 2016141
September 2016132
October 2016123
November 2016118
December 2016114
January 2017108
February 2017106
March 2017104
April 2017102
May 2017110
June 2017135
July 2017152
August 2017151
September 2017146
October 2017139
November 2017130
December 2017119
January 2018108
February 2018107
March 2018135
April 2018146
May 2018153
June 2018146
July 2018136
August 2018126
September 2018122
October 2018133
November 2018128
December 2018133
January 2019135
February 2019139
March 2019141
April 2019133
May 2019139
June 2019130
July 2019123
August 2019116
September 2019111
October 2019109
November 2019134
December 2019136
January 2020138
February 2020142
March 2020143
April 2020153
May 2020162
June 2020154
July 2020143
August 2020135
September 2020145
October 2020137
November 2020132
December 2020129
January 2021132
February 2021131
March 2021130
April 2021130
May 2021160
June 2021156
July 2021146
August 2021142
September 2021140
October 2021137
November 2021133
December 2021129
January 2022130
February 2022126
March 2022134
April 2022152
May 2022157
June 2022156
July 2022144
August 2022136
September 2022129
October 2022117
November 2022110
December 2022112
January 2023112
February 2023124
March 2023152
April 2023156
May 2023158
June 2023157
July 2023157
August 2023146
September 2023138
October 2023134
November 2023134
December 2023129
January 2024136
February 2024144
March 2024144
April 2024152
May 2024161
June 2024158
July 2024148
August 2024143
September 2024136
October 2024127
November 2024154
December 2024154
January 2025156
February 2025158
March 2025156
April 2025159
May 2025164
June 2025160
July 2025156
August 2025145
September 2025136
October 2025128
November 2025124
December 2025120
January 2026116
February 2026113
March 2026116
April 2026126
May 2026127
June 2026136
July 2026141
August 2026134

The reservoir's year

Seasonal storage profile
Each calendar month's reference average, against the most recent year
Seasonal storage profileSeasonal storage profile: 1991–2020 average, Most recent 12 months in Mm³, from 1 to 12.050100150Mm³123456789101112Month1991–2020 average 1: 121 Mm³1991–2020 average 2: 122 Mm³1991–2020 average 3: 124 Mm³1991–2020 average 4: 127 Mm³1991–2020 average 5: 137 Mm³1991–2020 average 6: 140 Mm³1991–2020 average 7: 136 Mm³1991–2020 average 8: 130 Mm³1991–2020 average 9: 125 Mm³1991–2020 average 10: 122 Mm³1991–2020 average 11: 122 Mm³1991–2020 average 12: 121 Mm³Most recent 12 months 1: 116 Mm³Most recent 12 months 2: 113 Mm³Most recent 12 months 3: 116 Mm³Most recent 12 months 4: 126 Mm³Most recent 12 months 5: 127 Mm³Most recent 12 months 6: 136 Mm³Most recent 12 months 7: 141 Mm³Most recent 12 months 8: 134 Mm³Most recent 12 months 9: 136 Mm³Most recent 12 months 10: 128 Mm³Most recent 12 months 11: 124 Mm³Most recent 12 months 12: 120 Mm³
  • 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
Period1991–2020 average (Mm³)Most recent 12 months (Mm³)
Jan121116
Feb122113
Mar124116
Apr127126
May137127
Jun140136
Jul136141
Aug130134
Sep125136
Oct122128
Nov122124
Dec121120

Rate and persistence

-0.90 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

Atoka Reservoir Near Stringtown, OK
Gauge location
Atoka Reservoir Near Stringtown, OKAtoka Reservoir Near Stringtown, OK — 133.79 Mm³Atoka Reservoir Near Stringtown, OK — 133.79 Mm³

Where this comes from

323 monthly observations 1999–2026 Mm³
Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 07333010. 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.

Hydrionis would like to measure which pages are read, using Google Analytics. It stores an identifier on your device, so we only do it if you agree. Nothing is stored if you decline, and the site works identically either way. See cookies for what is set and how to change your mind.