Statistical Resources

Comprehensive data library and statistical analysis for Lake Powell water data

Historical Trends

Elevation Trend

364 data points

Water Year Summaries

Water YearTotal InflowTotal OutflowNet FlowAvg Elevation (ft)Min Elevation (ft)Max Elevation (ft)Days
2026
1.36M acre-ft
(687,148 cfs-days)
1.66M acre-ft
(835,167 cfs-days)
-0.29M acre-ft
3543.093538.053545.65106
2025
5.13M acre-ft
(2,589,013 cfs-days)
6.99M acre-ft
(3,525,996 cfs-days)
-1.86M acre-ft
3563.013544.693578.01365
2024
8.13M acre-ft
(4,098,517 cfs-days)
6.80M acre-ft
(3,429,261 cfs-days)
+1.33M acre-ft
3571.233558.213587.17366
2023
12.04M acre-ft
(6,071,616 cfs-days)
8.49M acre-ft
(4,280,495 cfs-days)
+3.55M acre-ft
3543.933519.923584.68365
2022
6.11M acre-ft
(3,079,013 cfs-days)
7.00M acre-ft
(3,528,554 cfs-days)
-0.89M acre-ft
3533.683522.243545.35365
2021
4.06M acre-ft
(2,048,959 cfs-days)
8.23M acre-ft
(4,148,865 cfs-days)
-4.16M acre-ft
3569.413545.363595.83365
2020
6.54M acre-ft
(3,298,515 cfs-days)
8.23M acre-ft
(4,149,169 cfs-days)
-1.69M acre-ft
3605.793595.983615.27366
2019
11.78M acre-ft
(5,942,224 cfs-days)
8.92M acre-ft
(4,499,126 cfs-days)
+2.86M acre-ft
3590.853568.513621.68365
2018
5.46M acre-ft
(2,751,850 cfs-days)
9.00M acre-ft
(4,537,293 cfs-days)
-3.54M acre-ft
3613.733592.273628.41365
2017
11.39M acre-ft
(5,745,413 cfs-days)
8.87M acre-ft
(4,473,585 cfs-days)
+2.52M acre-ft
3612.113593.853635.80365
2016
9.91M acre-ft
(4,995,579 cfs-days)
9.00M acre-ft
(4,537,355 cfs-days)
+0.91M acre-ft
3604.313591.143621.45366
2015
9.42M acre-ft
(4,748,770 cfs-days)
8.87M acre-ft
(4,470,906 cfs-days)
+0.55M acre-ft
3600.953589.823614.32365
2014
9.28M acre-ft
(4,681,789 cfs-days)
7.33M acre-ft
(3,698,687 cfs-days)
+1.95M acre-ft
3590.183574.213609.68365
2013
5.36M acre-ft
(2,701,246 cfs-days)
8.15M acre-ft
(4,110,968 cfs-days)
-2.80M acre-ft
3602.923589.103621.48365
2012
5.96M acre-ft
(3,006,544 cfs-days)
9.46M acre-ft
(4,772,243 cfs-days)
-3.50M acre-ft
3636.563621.563652.89366
2011
15.49M acre-ft
(7,813,462 cfs-days)
12.51M acre-ft
(6,311,120 cfs-days)
+2.98M acre-ft
3631.893609.703660.90365
2010
8.46M acre-ft
(4,268,312 cfs-days)
8.23M acre-ft
(4,151,279 cfs-days)
+0.23M acre-ft
3628.683618.623638.82365
2009
9.70M acre-ft
(4,892,137 cfs-days)
8.23M acre-ft
(4,152,010 cfs-days)
+1.47M acre-ft
3624.283609.703642.30365
2008
12.16M acre-ft
(6,130,097 cfs-days)
8.88M acre-ft
(4,479,376 cfs-days)
+3.27M acre-ft
3606.533588.243633.72366
2007
8.61M acre-ft
(4,343,576 cfs-days)
8.23M acre-ft
(4,149,465 cfs-days)
+0.38M acre-ft
3604.133597.383611.68365
2006
8.57M acre-ft
(4,319,222 cfs-days)
8.23M acre-ft
(4,148,299 cfs-days)
+0.34M acre-ft
3599.713588.663610.87365
2005
11.54M acre-ft
(5,821,347 cfs-days)
8.13M acre-ft
(4,101,614 cfs-days)
+3.41M acre-ft
3577.543555.103608.38365
2004
5.38M acre-ft
(2,711,990 cfs-days)
8.23M acre-ft
(4,149,853 cfs-days)
-2.85M acre-ft
3587.993570.573603.72366
2003
6.07M acre-ft
(3,061,515 cfs-days)
8.23M acre-ft
(4,148,641 cfs-days)
-2.16M acre-ft
3613.623603.573626.55365
2002
3.67M acre-ft
(1,851,940 cfs-days)
8.23M acre-ft
(4,149,603 cfs-days)
-4.56M acre-ft
3647.233626.533664.73365
2001
6.85M acre-ft
(3,456,353 cfs-days)
8.23M acre-ft
(4,151,952 cfs-days)
-1.38M acre-ft
3668.743662.393677.74365
2000
7.77M acre-ft
(3,919,273 cfs-days)
9.38M acre-ft
(4,728,082 cfs-days)
-1.60M acre-ft
3681.153675.533691.52366
1999
12.48M acre-ft
(6,293,574 cfs-days)
11.20M acre-ft
(5,647,822 cfs-days)
+1.28M acre-ft
3685.223677.203694.73365
1998
13.72M acre-ft
(6,917,328 cfs-days)
13.51M acre-ft
(6,811,330 cfs-days)
+0.21M acre-ft
3685.293672.813697.06365
1997
16.22M acre-ft
(8,177,827 cfs-days)
13.78M acre-ft
(6,949,747 cfs-days)
+2.44M acre-ft
3678.163663.083695.09365
1996
10.89M acre-ft
(5,490,299 cfs-days)
11.26M acre-ft
(5,675,861 cfs-days)
-0.37M acre-ft
3680.683671.793688.31366
1995
14.69M acre-ft
(7,408,852 cfs-days)
9.29M acre-ft
(4,684,457 cfs-days)
+5.40M acre-ft
3661.303644.593693.75365
1994
7.68M acre-ft
(3,874,891 cfs-days)
8.21M acre-ft
(4,140,868 cfs-days)
-0.53M acre-ft
3658.983653.543665.75365
1993
13.70M acre-ft
(6,910,485 cfs-days)
8.17M acre-ft
(4,120,962 cfs-days)
+5.53M acre-ft
3634.323612.463668.70365
1992
7.77M acre-ft
(3,916,939 cfs-days)
8.23M acre-ft
(4,149,410 cfs-days)
-0.46M acre-ft
3625.573619.283634.01366
1991
7.46M acre-ft
(3,763,935 cfs-days)
8.15M acre-ft
(4,109,928 cfs-days)
-0.69M acre-ft
3632.763627.123639.02365
1990
4.91M acre-ft
(2,474,437 cfs-days)
8.18M acre-ft
(4,123,523 cfs-days)
-3.27M acre-ft
3652.633637.583665.20365
1989
5.46M acre-ft
(2,755,627 cfs-days)
8.16M acre-ft
(4,116,016 cfs-days)
-2.70M acre-ft
3676.823665.203685.58365
1988
8.40M acre-ft
(4,235,234 cfs-days)
8.18M acre-ft
(4,123,676 cfs-days)
+0.22M acre-ft
3686.483681.653693.31366
1987
13.80M acre-ft
(6,958,420 cfs-days)
13.20M acre-ft
(6,654,360 cfs-days)
+0.60M acre-ft
3687.773677.473698.47365
1986
18.14M acre-ft
(9,146,530 cfs-days)
15.72M acre-ft
(7,926,672 cfs-days)
+2.42M acre-ft
3688.033680.683700.02365
1985
18.04M acre-ft
(9,096,220 cfs-days)
18.05M acre-ft
(9,101,348 cfs-days)
-0.01M acre-ft
3688.313674.823700.12365
1984
16.55M acre-ft
(8,346,605 cfs-days)
18.42M acre-ft
(9,287,948 cfs-days)
-1.87M acre-ft
3688.523672.993702.46366
1983
18.61M acre-ft
(9,383,378 cfs-days)
13.80M acre-ft
(6,956,791 cfs-days)
+4.81M acre-ft
3691.913682.013708.34365
1982
11.30M acre-ft
(5,700,608 cfs-days)
8.14M acre-ft
(4,103,828 cfs-days)
+3.17M acre-ft
3673.373661.893687.47365
1981
6.41M acre-ft
(3,232,528 cfs-days)
8.01M acre-ft
(4,039,302 cfs-days)
-1.60M acre-ft
3679.333671.963687.76365
1980
12.85M acre-ft
(6,478,018 cfs-days)
10.82M acre-ft
(5,457,526 cfs-days)
+2.02M acre-ft
3682.063672.363700.59366
1979
14.20M acre-ft
(7,159,872 cfs-days)
8.44M acre-ft
(4,258,343 cfs-days)
+5.75M acre-ft
3651.173626.933684.77365
1978
9.45M acre-ft
(4,765,466 cfs-days)
8.44M acre-ft
(4,258,605 cfs-days)
+1.01M acre-ft
3635.003622.293652.75365
1977
5.48M acre-ft
(2,763,512 cfs-days)
8.35M acre-ft
(4,208,454 cfs-days)
-2.87M acre-ft
3652.643636.703663.88365
1976
8.71M acre-ft
(4,393,012 cfs-days)
8.47M acre-ft
(4,271,586 cfs-days)
+0.24M acre-ft
3667.243664.003672.27366
1975
12.36M acre-ft
(6,234,484 cfs-days)
9.37M acre-ft
(4,725,071 cfs-days)
+2.99M acre-ft
3655.393645.343674.93365
1974
9.99M acre-ft
(5,035,922 cfs-days)
8.41M acre-ft
(4,241,319 cfs-days)
+1.58M acre-ft
3653.213645.683667.35365
1973
15.39M acre-ft
(7,762,630 cfs-days)
10.06M acre-ft
(5,074,418 cfs-days)
+5.33M acre-ft
3615.283590.603646.19365
1972
8.80M acre-ft
(4,435,201 cfs-days)
9.33M acre-ft
(4,704,943 cfs-days)
-0.53M acre-ft
3611.793603.403619.71366
1971
11.04M acre-ft
(5,566,614 cfs-days)
8.89M acre-ft
(4,482,805 cfs-days)
+2.15M acre-ft
3607.023598.803622.34365
1970
11.75M acre-ft
(5,927,853 cfs-days)
8.67M acre-ft
(4,371,334 cfs-days)
+3.09M acre-ft
3580.393566.623601.77365
1969
11.51M acre-ft
(5,802,012 cfs-days)
8.82M acre-ft
(4,445,326 cfs-days)
+2.69M acre-ft
3555.923539.293581.18365
1968
9.92M acre-ft
(5,002,998 cfs-days)
8.41M acre-ft
(4,243,011 cfs-days)
+1.51M acre-ft
3531.113513.303550.38366
1967
8.25M acre-ft
(4,162,675 cfs-days)
7.60M acre-ft
(3,832,033 cfs-days)
+0.66M acre-ft
3521.063502.233532.85365
1966
8.55M acre-ft
(4,309,400 cfs-days)
8.27M acre-ft
(4,170,399 cfs-days)
+0.28M acre-ft
3536.603529.463545.68365
1965
13.70M acre-ft
(6,909,385 cfs-days)
6.46M acre-ft
(3,256,255 cfs-days)
+7.24M acre-ft
3501.433490.763533.90365
1964
5.95M acre-ft
(2,998,817 cfs-days)
0.14M acre-ft
(71,105 cfs-days)
+5.81M acre-ft
3440.223394.503491.72278

Monthly Averages

YearMonthAvg Elevation (ft)Avg Inflow (cfs)Total Inflow (acre-ft)
2026January3539.124,747.0710.13M
2025December3541.685,086.9350.31M
2025November3544.426,130.80.36M
2025October3545.029,002.2580.55M
2025September3546.265,816.1670.35M
2025August3551.584,355.290.27M
2025July3558.384,693.7740.29M
2025June3561.1314,843.3330.88M
2025May3558.3211,350.6770.70M
2025April3558.508,514.40.51M
2025March3560.886,011.5810.37M
2025February3564.725,929.5360.33M
2025January3568.034,508.6880.14M

Seasonal Trends

SeasonAvg Elevation (ft)Avg Inflow (cfs)Total Inflow (acre-ft)
spring3614.4418,348.518207.54M
summer3631.1820,047.459226.76M
fall3625.988,678.97697.10M
winter3617.657,988.8888.94M