HydrionisGlobal Water Intelligence
Monitored reservoir

Lake Eucha Near Eucha, OK

United States Geological Survey reservoir gauge 07191285 in OK, with published storage from 2001.

Storage record07191285

Storage now, against this reservoir's own record

81.06 Mm³
Stored, August 2026
17th
Percentile among 25 Augs on record
+0.3%
Change over the 12 months to 2026-08

Storage in August 2026 was lower than most Augs on record, ranked against 25 other Augs held for this reservoir.

Storage, 2001–2026

Monthly mean storage
299 monthly values, 2001 to 2026
Monthly mean storageMonthly mean storage: Lake Eucha Near Eucha, OK in Mm³, from 2001.75 to 2026.5833333333333.0255075100Mm³2001.752004.91666666666672008.08333333333332011.252014.41666666666672017.58333333333332020.752023.9166666666667Year

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
PeriodLake Eucha Near Eucha, OK (Mm³)
October 200170.3
November 200171.5
December 200179.1
January 200288.2
February 200293.3
March 200294.1
April 200294.5
May 200294.9
June 200294.3
July 200291.3
August 200285.7
September 200279.2
October 200272.8
November 200269.7
December 200269.0
January 200369.9
February 200370.2
March 200378.9
April 200385.1
May 200390.7
June 200394.0
July 200391.7
August 200384.6
September 200379.5
October 200374.9
November 200371.4
December 200373.2
January 200480.0
February 200491.1
March 200494.8
April 200494.7
May 200494.6
June 200493.9
July 200494.6
August 200493.8
September 200491.6
October 200486.7
November 200494.2
December 200494.2
January 200594.7
February 200593.7
March 200594.3
April 200594.5
May 200593.9
June 200593.9
July 200591.0
August 200584.8
September 200579.9
October 200573.8
November 200568.1
December 200563.5
January 200662.7
February 200662.5
March 200661.2
April 200659.8
May 200669.9
June 200672.5
July 200667.1
August 200660.4
September 200660.1
October 200661.5
November 200662.8
December 200673.0
January 200790.8
February 200793.8
March 200793.7
April 200793.8
May 200794.2
June 200794.0
July 200793.7
August 200789.1
September 200782.9
October 200790.2
November 200793.2
December 200793.3
January 200894.4
February 200894.9
March 200895.6
April 200895.8
May 200894.6
June 200895.1
July 200894.3
August 200893.7
September 200893.6
October 200893.8
November 200893.8
December 200893.9
January 200991.4
February 200993.6
March 200993.8
April 200994.4
May 200994.8
June 200993.9
July 200991.6
August 200989.3
September 200992.6
October 200994.9
November 200994.3
December 200993.9
January 201094.0
February 201094.3
March 201094.6
April 201094.0
May 201094.2
June 201093.5
July 201092.3
August 201086.8
September 201081.1
October 201077.4
November 201073.5
December 201074.0
January 201172.7
February 201175.1
March 201185.1
April 201189.8
May 201194.8
June 201193.8
July 201188.5
August 201181.0
September 201173.0
October 201168.2
November 201170.9
December 201183.1
January 201289.5
February 201293.8
March 201294.2
April 201293.8
May 201292.9
June 201289.7
July 201281.0
August 201269.0
September 201262.3
October 201259.7
November 201257.3
December 201255.7
January 201359.6
February 201370.1
March 201385.4
April 201394.7
May 201394.7
June 201394.0
July 201390.3
August 201393.5
September 201392.4
October 201388.5
November 201389.9
December 201392.0
January 201493.9
February 201493.7
March 201494.0
April 201493.3
May 201493.8
June 201494.1
July 201493.4
August 201491.8
September 201486.0
October 201490.5
November 201493.8
December 201494.0
January 201594.0
February 201593.9
March 201594.7
April 201594.1
May 201594.9
June 201594.8
July 201594.9
August 201593.9
September 201593.7
October 201592.3
November 201593.0
December 201595.9
January 201694.5
February 201693.9
March 201694.1
April 201694.0
May 201694.2
June 201693.6
July 201693.2
August 201691.7
September 201688.8
October 201687.3
November 201686.2
December 201683.0
January 201781.5
February 201783.7
March 201784.7
April 201789.9
May 201793.6
June 201794.0
July 201793.3
August 201792.1
September 201787.7
October 201784.7
November 201783.0
December 201781.8
January 201884.5
February 201889.7
March 201894.6
April 201894.2
May 201894.3
June 201893.0
July 201888.6
August 201885.1
September 201881.8
October 201878.6
November 201878.4
December 201879.4
January 201993.3
February 201994.1
March 201994.1
April 201994.4
May 201995.5
June 201994.9
July 201993.6
August 201993.7
September 201993.4
October 201994.1
November 201994.9
December 201994.3
January 202094.8
February 202083.2
March 202080.0
April 202089.8
May 202095.3
June 202094.3
July 202093.8
August 202093.6
September 202091.9
October 202091.0
November 202093.8
December 202094.0
January 202194.5
February 202194.2
March 202193.7
April 202194.6
May 202194.6
June 202194.3
July 202194.4
August 202193.8
September 202191.8
October 202188.7
November 202193.0
December 202194.3
January 202294.1
February 202293.9
March 202294.4
April 202294.7
May 202293.5
June 202293.5
July 202291.6
August 202293.0
September 202289.6
October 202282.5
November 202280.6
December 202290.4
January 202390.0
February 202394.6
March 202395.3
April 202394.1
May 202394.0
June 202393.6
July 202392.9
August 202392.8
September 202390.5
October 202393.3
November 202393.6
December 202394.0
January 202494.1
February 202494.1
March 202493.8
April 202493.5
May 202494.8
June 202493.0
July 202487.6
August 202482.0
September 202476.3
October 202469.3
November 202467.6
December 202467.0
January 202565.8
February 202564.6
March 202566.1
April 202578.6
May 202580.8
June 202582.1
July 202581.2
August 202580.8
September 202582.5
October 202582.4
November 202581.7
December 202581.9
January 202682.3
February 202683.9
March 202683.7
April 202684.9
May 202683.5
June 202683.5
July 202683.2
August 202681.1

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 12.0255075100Mm³123456789101112Month1991–2020 average 10: 81.6 Mm³1991–2020 average 11: 81.7 Mm³1991–2020 average 12: 83.0 Mm³Most recent 12 months 1: 82.3 Mm³Most recent 12 months 2: 83.9 Mm³Most recent 12 months 3: 83.7 Mm³Most recent 12 months 4: 84.9 Mm³Most recent 12 months 5: 83.5 Mm³Most recent 12 months 6: 83.5 Mm³Most recent 12 months 7: 83.2 Mm³Most recent 12 months 8: 81.1 Mm³Most recent 12 months 9: 82.5 Mm³Most recent 12 months 10: 82.4 Mm³Most recent 12 months 11: 81.7 Mm³Most recent 12 months 12: 81.9 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)
Jan—82.3
Feb—83.9
Mar—83.7
Apr—84.9
May—83.5
Jun—83.5
Jul—83.2
Aug—81.1
Sep—82.5
Oct81.682.4
Nov81.781.7
Dec83.081.9

Rate and persistence

+0.02 Mm³
Mean change per month over 12 months
18 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

Lake Eucha Near Eucha, OK
Gauge location
Lake Eucha Near Eucha, OKLake Eucha Near Eucha, OK — 81.06 Mm³Lake Eucha Near Eucha, OK — 81.06 Mm³

Where this comes from

299 monthly observations 2001–2026 Mm³
Spatially aggregatedHigh confidenceAugust 2026

Source: USGS — National Water Information System, 07191285. 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.

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