Garrison Reservoir water level history

Daily records since 1989 · Level today: 1,823.98 ft

Highest on record

1,854.54 ft

Jul 4, 2011

Lowest on record

1,805.80 ft

May 12, 2005

Today

1,823.98 ft

Oct 21, 2026

Years of data

since 1989

In short

Across 36 complete years, 2005 had the lowest average level (1,811.77 ft) and 1997 the highest (1,845.37 ft).

On average the lake is lowest in February (1,829.26 ft) and highest in July (1,837.40 ft).

Garrison Reservoir level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years) Full pool

Lowest years

Years ranked by their lowest daily level.

20051,805.80 ft on May 12
20071,806.70 ft on Feb 22
20081,807.28 ft on May 1
20061,807.83 ft on Dec 28
20041,810.16 ft on Dec 30

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (293 days)	1,826.94	1,823.94	Oct 19	1,829.18	Jan 1
2025	1,832.20	1,829.19	Dec 31	1,835.22	Jun 30
2024	1,837.95	1,835.07	Mar 10	1,842.97	Jul 15
2023	1,834.90	1,824.63	Apr 1	1,842.66	Aug 11
2022	1,831.65	1,827.40	Apr 19	1,838.57	Jul 19
2021	1,834.20	1,828.26	Dec 31	1,839.03	Jan 14
2020	1,840.20	1,837.90	Feb 26	1,844.36	Jul 13
2019	1,844.22	1,836.93	Mar 18	1,852.35	Jul 19
2018	1,843.40	1,837.43	Mar 17	1,853.26	Jul 4
2017	1,841.78	1,837.47	Feb 15	1,846.68	Jul 11
2016	1,839.18	1,837.03	Apr 23	1,842.25	Jun 25
2015	1,840.86	1,838.21	May 12	1,844.97	Jul 28
2014	1,839.88	1,831.36	Mar 9	1,846.68	Jul 26
2013	1,831.85	1,827.19	Mar 13	1,836.62	Jul 18
2012	1,835.40	1,829.49	Dec 31	1,839.58	Jan 1
2011	1,844.49	1,837.69	Mar 16	1,854.54	Jul 4
2010	1,843.36	1,837.14	Mar 16	1,851.08	Aug 14
2009	1,834.78	1,823.32	Mar 7	1,842.64	Aug 20
2008	1,817.40	1,807.28	May 1	1,826.54	Oct 26
2007	1,811.94	1,806.70	Feb 22	1,818.34	Jul 10
2006	1,811.81	1,807.83	Dec 28	1,817.42	Jun 30
2005	1,811.77	1,805.80	May 12	1,817.66	Jul 17
2004	1,814.69	1,810.16	Dec 30	1,818.41	Jan 2
2003	1,822.04	1,818.44	Dec 31	1,827.38	Jul 10
2002	1,827.92	1,822.51	Dec 31	1,831.88	Jul 10
2001	1,831.14	1,828.23	Mar 11	1,834.53	Aug 5
2000	1,835.65	1,829.06	Dec 31	1,840.69	Jan 3
1999	1,842.65	1,838.84	Feb 28	1,847.43	Jul 16
1998	1,840.84	1,838.89	Mar 23	1,843.41	Jul 20
1997	1,845.37	1,837.91	Feb 5	1,854.39	Jul 2
1996	1,842.51	1,837.45	Feb 9	1,849.59	Jul 21
1995	1,841.57	1,835.08	Mar 11	1,852.02	Aug 9
1994	1,840.54	1,836.23	Mar 4	1,845.26	Jun 25
1993	1,828.17	1,816.78	Mar 2	1,837.69	Nov 19
1992	1,822.11	1,818.91	Dec 31	1,825.11	Jul 16
1991	1,822.21	1,815.07	May 18	1,829.29	Jul 22
1990	1,820.79	1,819.14	May 24	1,823.42	Jul 17
1989 (1 days)	1,821.05	1,821.05	Dec 31	1,821.05	Dec 31

Levels in feet. Partial years show the number of days with data.

Monthly averages

Month	Average	Lowest	Highest
January	1,830.32	1,807.03	1,841.58
February	1,829.26	1,806.70	1,839.89
March	1,829.31	1,806.93	1,844.25
April	1,830.66	1,806.70	1,847.56
May	1,831.36	1,805.80	1,853.45
June	1,834.63	1,808.95	1,854.49
July	1,837.40	1,815.00	1,854.54
August	1,836.36	1,812.06	1,852.27
September	1,834.41	1,809.55	1,850.33
October	1,833.56	1,809.37	1,848.19
November	1,832.94	1,808.88	1,845.39
December	1,831.78	1,807.83	1,842.35

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Daily levels as CSV (13,443 rows; credit the original agencies listed below)