Waterbury Reservoir water level history

Daily records since 1938 · Level today: 589.59 ft

Highest on record

613.44 ft

May 4, 1940

Lowest on record

501.30 ft

Jul 12, 1981

Today

589.59 ft

Oct 21, 2026

Years of data

since 1938

In short

Across 86 complete years, 1985 had the lowest average level (532.25 ft) and 2018 the highest (591.37 ft).

On average the lake is lowest in March (562.28 ft) and highest in May (586.54 ft).

Waterbury Reservoir level, all years

Loading chart…

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

Lowest years

Years ranked by their lowest daily level.

1981501.30 ft on Jul 12
1984501.53 ft on Aug 19
1985501.70 ft on Jul 25
1986502.07 ft on Aug 29
1941504.60 ft on Apr 5

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (281 days)	590.04	581.76	Mar 7	594.69	Jun 20
2025	589.82	574.43	Mar 5	596.24	May 19
2024	589.88	583.87	Apr 22	600.85	Jul 12
2023	589.51	579.64	Mar 14	604.24	Jul 11
2022	588.49	578.07	Feb 17	593.70	Apr 19
2021	587.67	572.72	Mar 10	593.49	May 1
2020	589.01	580.56	Feb 26	594.16	Apr 14
2019	587.57	571.28	Feb 28	603.04	Apr 21
2018	591.37	588.80	Dec 20	599.28	Dec 22
2017	590.18	573.91	Feb 22	596.18	Jul 1
2016	589.76	583.04	Feb 24	593.51	Mar 11
2015 (272 days)	590.36	588.70	Sep 28	594.35	Jun 10
2014	587.66	572.01	Mar 28	600.22	Apr 16
2013	588.55	580.10	Mar 5	595.71	Jul 4
2012	589.82	586.14	Mar 7	593.98	Mar 19
2011	589.57	580.41	Feb 14	605.28	Apr 28
2010	588.37	578.45	Mar 12	598.17	Oct 1
2009	589.44	570.98	Mar 11	594.14	Dec 3
2008	585.03	548.68	Mar 17	598.00	Jul 25
2007	588.78	573.52	Mar 13	596.61	Jan 6
2006	561.33	548.45	Jun 6	594.29	Dec 23
2005	552.03	548.98	Feb 4	576.94	Oct 19
2004	551.13	548.46	Feb 17	558.93	Mar 28
2003	551.50	548.30	Jan 27	566.37	Nov 20
2002	543.03	517.33	Aug 4	571.32	Apr 17
2001	550.45	537.56	Apr 7	575.99	Apr 24
2000	569.20	548.72	Oct 22	598.31	May 11
1999	584.36	553.33	Mar 17	594.92	Sep 17
1998	585.11	550.68	Mar 24	596.49	Apr 3
1997	580.81	550.86	Mar 28	592.29	Nov 2
1996	585.35	552.34	Mar 14	597.23	May 12
1995	584.79	557.00	Mar 13	599.36	Aug 6
1994	581.05	532.90	Mar 22	594.57	Apr 27
1993	582.70	544.44	Mar 11	593.34	Apr 26
1992	582.92	560.86	Mar 6	593.02	May 3
1991	583.45	543.42	Mar 1	593.20	Jan 1
1990	585.62	553.57	Mar 12	598.20	Dec 24
1989	583.17	541.13	Mar 14	597.61	May 7
1988	583.27	549.30	Mar 9	598.53	Nov 21
1987	584.40	548.61	Mar 19	592.28	Sep 13
1986	579.68	502.07	Aug 29	593.95	Aug 25
1985	532.25	501.70	Jul 25	578.11	May 28
1984	538.21	501.53	Aug 19	579.26	Jun 8
1983	544.86	526.26	Jan 10	591.03	May 11
1982	538.73	523.22	Jun 26	588.54	May 3
1981	533.38	501.30	Jul 12	570.97	Feb 26
1980	583.79	556.91	Mar 17	591.87	Sep 23
1979	587.17	567.42	Mar 3	593.89	Nov 27
1978	580.87	534.33	Apr 4	592.81	Jan 10
1977	590.92	586.65	Dec 23	601.00	Mar 15
1976	588.52	570.33	Mar 20	601.70	Apr 4
1975	581.59	536.80	Apr 11	593.60	Oct 21
1974	583.53	540.00	Apr 3	595.20	Jan 1
1973	588.26	562.03	Mar 11	601.31	Jul 1
1972	583.64	540.74	Apr 12	597.92	May 7
1971	583.06	540.56	Apr 10	594.23	May 11
1970	582.93	524.10	Apr 6	593.88	May 1
1969	583.00	541.80	Mar 24	598.57	May 20
1968	585.98	554.78	Mar 15	593.09	Nov 29
1967	585.57	549.56	Mar 27	592.76	Dec 13
1966	583.72	554.54	Apr 13	593.33	May 20
1965	581.80	534.38	Apr 4	592.80	Nov 17
1964	582.68	545.40	Apr 6	591.69	Aug 24
1963	584.19	560.14	Mar 20	592.24	Nov 19
1962	579.70	544.22	Mar 14	596.55	Jul 31
1961	575.85	551.22	Feb 17	593.62	Jun 22
1960	580.58	534.68	Mar 29	593.36	Apr 25
1959	579.31	541.13	Mar 30	597.34	Nov 28
1958	581.43	546.27	Mar 21	600.03	Apr 23
1957	573.42	538.04	Mar 24	593.61	Jul 5
1956	573.90	535.36	Mar 30	594.95	May 28
1955	581.31	550.09	Apr 1	593.76	Apr 25
1954	583.15	542.20	Apr 3	597.41	Apr 23
1953	584.81	567.59	Oct 5	600.74	Mar 27
1952	588.69	553.00	Mar 23	600.90	Jun 2
1951	585.02	554.63	Mar 28	594.60	Apr 27
1950	581.66	535.95	Mar 22	596.18	Dec 6
1949	582.91	543.52	Mar 22	597.68	Jan 1
1948	581.32	552.31	Mar 15	597.56	Dec 31
1947	570.71	529.94	Mar 29	598.38	Jun 4
1946	584.63	553.87	Mar 5	595.37	May 21
1945	586.28	556.95	Mar 3	600.50	Oct 3
1944	577.28	543.82	Mar 24	603.04	May 1
1943	584.92	551.90	Mar 11	604.09	May 3
1942	585.79	543.41	Mar 6	611.73	Jun 15
1941	574.92	504.60	Apr 5	592.97	Apr 28
1940	568.05	509.60	Mar 28	613.44	May 4
1939	563.02	512.10	Mar 23	595.88	Apr 28
1938 (92 days)	523.68	501.40	Nov 7	569.97	Dec 31

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

Monthly averages

Month	Average	Lowest	Highest
January	577.58	519.17	598.80
February	569.40	520.69	598.29
March	562.28	509.60	601.00
April	576.65	504.60	605.28
May	586.54	512.32	613.44
June	585.48	503.10	611.73
July	582.91	501.30	604.24
August	580.98	501.53	600.28
September	579.39	505.15	596.72
October	579.17	504.00	600.50
November	581.34	501.40	601.96
December	581.43	512.40	603.83

Download

Daily levels as CSV (32,018 rows; credit the original agencies listed below)