Echo Reservoir, UT — storage

Storage now, against this reservoir's own record

14.84 Mm³

Stored, September 1990

24th

Percentile among 60 Seps on record

-38.5%

Change over the 12 months to 1990-09

Storage in September 1990 was lower than most Seps on record, ranked against 60 other Seps held for this reservoir.

Storage, 1930–1990

Monthly mean storage

719 monthly values, 1930 to 1990

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
Period	Echo Reservoir At Echo, UT (Mm³)
October 1930	4.58
November 1930	10.3
December 1930	7.68
January 1931	7.72
February 1931	8.03
March 1931	9.13
April 1931	11.6
May 1931	19.6
June 1931	20.1
July 1931	5.93
August 1931	0.327
September 1931	0.077
October 1931	0
November 1931	0
December 1931	0.362
January 1932	0.869
February 1932	0.947
March 1932	4.31
April 1932	28.9
May 1932	62.8
June 1932	72.8
July 1932	70.0
August 1932	42.8
September 1932	25.4
October 1932	20.7
November 1932	20.8
December 1932	21.8
January 1933	22.6
February 1933	23.3
March 1933	25.2
April 1933	39.7
May 1933	62.8
June 1933	84.7
July 1933	74.2
August 1933	43.0
September 1933	19.6
October 1933	14.2
November 1933	13.9
December 1933	15.3
January 1934	22.0
February 1934	29.1
March 1934	39.5
April 1934	44.6
May 1934	36.5
June 1934	25.3
July 1934	11.2
August 1934	3.70
September 1934	0.216
October 1934	0
November 1934	1.45
December 1934	5.35
January 1935	11.1
February 1935	17.3
March 1935	26.3
April 1935	40.5
May 1935	67.3
June 1935	90.0
July 1935	71.6
August 1935	39.4
September 1935	16.1
October 1935	3.23
November 1935	1.16
December 1935	1.15
January 1936	1.18
February 1936	3.91
March 1936	12.3
April 1936	30.5
May 1936	67.0
June 1936	89.8
July 1936	79.7
August 1936	67.1
September 1936	49.1
October 1936	39.4
November 1936	39.0
December 1936	39.2
January 1937	39.1
February 1937	42.7
March 1937	51.9
April 1937	66.3
May 1937	82.0
June 1937	89.6
July 1937	80.3
August 1937	64.6
September 1937	46.9
October 1937	36.2
November 1937	35.8
December 1937	37.0
January 1938	39.0
February 1938	42.9
March 1938	57.4
April 1938	73.6
May 1938	81.4
June 1938	89.8
July 1938	79.9
August 1938	53.4
September 1938	32.6
October 1938	21.2
November 1938	20.8
December 1938	22.1
January 1939	22.6
February 1939	22.8
March 1939	29.3
April 1939	60.7
May 1939	88.3
June 1939	81.9
July 1939	54.1
August 1939	27.3
September 1939	7.81
October 1939	2.00
November 1939	2.05
December 1939	2.01
January 1940	3.61
February 1940	9.04
March 1940	19.3
April 1940	32.1
May 1940	51.7
June 1940	57.8
July 1940	36.7
August 1940	15.7
September 1940	5.50
October 1940	3.07
November 1940	3.13
December 1940	3.48
January 1941	3.70
February 1941	6.50
March 1941	17.0
April 1941	29.1
May 1941	50.5
June 1941	84.7
July 1941	70.3
August 1941	46.8
September 1941	26.3
October 1941	20.3
November 1941	22.2
December 1941	22.8
January 1942	21.5
February 1942	21.7
March 1942	22.8
April 1942	54.1
May 1942	81.7
June 1942	89.7
July 1942	77.2
August 1942	50.3
September 1942	27.9
October 1942	20.0
November 1942	19.9
December 1942	20.9
January 1943	21.1
February 1943	23.6
March 1943	34.6
April 1943	56.4
May 1943	85.2
June 1943	91.6
July 1943	80.0
August 1943	53.6
September 1943	31.6
October 1943	25.1
November 1943	25.0
December 1943	24.6
January 1944	24.5
February 1944	24.6
March 1944	27.5
April 1944	49.4
May 1944	82.2
June 1944	91.1
July 1944	74.6
August 1944	41.1
September 1944	13.0
October 1944	0.636
November 1944	0.141
December 1944	2.49
January 1945	6.60
February 1945	12.2
March 1945	17.8
April 1945	36.3
May 1945	72.4
June 1945	90.3
July 1945	76.2
August 1945	57.3
September 1945	45.2
October 1945	40.9
November 1945	42.8
December 1945	46.7
January 1946	51.0
February 1946	51.5
March 1946	57.8
April 1946	80.4
May 1946	90.8
June 1946	88.0
July 1946	73.1
August 1946	51.7
September 1946	30.5
October 1946	22.8
November 1946	30.5
December 1946	41.5
January 1947	43.9
February 1947	45.4
March 1947	54.3
April 1947	76.5
May 1947	89.8
June 1947	91.3
July 1947	72.6
August 1947	47.4
September 1947	28.9
October 1947	26.6
November 1947	28.2
December 1947	29.2
January 1948	30.0
February 1948	30.0
March 1948	39.4
April 1948	60.2
May 1948	86.4
June 1948	89.7
July 1948	72.0
August 1948	40.3
September 1948	14.4
October 1948	9.95
November 1948	14.6
December 1948	15.8
January 1949	15.6
February 1949	15.4
March 1949	15.2
April 1949	28.8
May 1949	77.1
June 1949	91.1
July 1949	78.1
August 1949	48.8
September 1949	28.0
October 1949	25.9
November 1949	29.1
December 1949	29.5
January 1950	30.2
February 1950	34.3
March 1950	44.9
April 1950	68.7
May 1950	84.1
June 1950	89.3
July 1950	88.2
August 1950	66.9
September 1950	48.1
October 1950	48.4
November 1950	49.3
December 1950	54.6
January 1951	54.4
February 1951	55.1
March 1951	56.6
April 1951	64.5
May 1951	74.1
June 1951	90.2
July 1951	81.5
August 1951	68.5
September 1951	54.2
October 1951	47.4
November 1951	47.6
December 1951	47.6
January 1952	47.4
February 1952	46.6
March 1952	29.4
April 1952	25.3
May 1952	74.6
June 1952	89.1
July 1952	85.5
August 1952	66.9
September 1952	52.0
October 1952	48.2
November 1952	48.0
December 1952	47.9
January 1953	48.5
February 1953	49.7
March 1953	51.5
April 1953	65.7
May 1953	86.4
June 1953	90.6
July 1953	76.7
August 1953	53.2
September 1953	28.8
October 1953	16.7
November 1953	18.3
December 1953	27.0
January 1954	35.1
February 1954	37.3
March 1954	40.5
April 1954	52.6
May 1954	62.6
June 1954	61.7
July 1954	44.2
August 1954	22.0
September 1954	5.43
November 1954	1.33
December 1954	8.01
January 1955	14.4
February 1955	20.4
March 1955	28.2
April 1955	42.9
May 1955	67.0
June 1955	86.1
July 1955	61.5
August 1955	30.6
September 1955	8.25
October 1955	5.11
November 1955	10.1
December 1955	21.8
January 1956	36.6
February 1956	40.5
March 1956	39.2
April 1956	53.9
May 1956	83.8
June 1956	90.5
July 1956	66.2
August 1956	33.9
September 1956	14.6
October 1956	10.0
November 1956	11.1
December 1956	15.4
January 1957	22.0
February 1957	24.2
March 1957	41.8
April 1957	49.4
May 1957	67.2
June 1957	89.0
July 1957	82.9
August 1957	50.4
September 1957	29.9
October 1957	28.4
November 1957	36.4
December 1957	38.2
January 1958	41.9
February 1958	45.7
March 1958	53.1
April 1958	57.7
May 1958	72.5
June 1958	86.4
July 1958	54.1
August 1958	21.2
September 1958	13.3
October 1958	12.1
November 1958	11.6
December 1958	16.1
January 1959	23.6
February 1959	30.9
March 1959	40.2
April 1959	55.0
May 1959	57.2
June 1959	39.0
July 1959	40.3
August 1959	24.2
September 1959	12.7
October 1959	11.7
November 1959	16.3
December 1959	21.6
January 1960	25.8
February 1960	31.2
March 1960	39.9
April 1960	57.6
May 1960	66.2
June 1960	57.6
July 1960	43.7
August 1960	22.1
September 1960	9.72
October 1960	8.24
November 1960	14.1
December 1960	19.9
January 1961	24.9
February 1961	29.3
March 1961	36.5
April 1961	45.5
May 1961	40.4
June 1961	29.0
July 1961	15.6
August 1961	7.11
September 1961	0.853
October 1961	4.44
November 1961	8.85
December 1961	13.0
January 1962	17.6
February 1962	26.3
March 1962	33.5
April 1962	45.8
May 1962	65.4
June 1962	73.0
July 1962	63.1
August 1962	39.6
September 1962	20.3
October 1962	18.7
November 1962	27.7
December 1962	27.7
January 1963	32.2
February 1963	41.8
March 1963	51.1
April 1963	62.3
May 1963	74.6
June 1963	77.2
July 1963	60.3
August 1963	31.2
September 1963	16.5
October 1963	21.0
November 1963	29.8
December 1963	35.2
January 1964	40.2
February 1964	45.0
March 1964	50.6
April 1964	60.1
May 1964	77.5
June 1964	91.9
July 1964	83.5
August 1964	55.4
September 1964	29.3
October 1964	21.3
November 1964	32.2
December 1964	47.1
January 1965	57.6
February 1965	64.8
March 1965	65.7
April 1965	58.4
May 1965	65.2
June 1965	90.2
July 1965	90.1
August 1965	78.6
September 1965	65.2
October 1965	58.5
November 1965	63.9
December 1965	77.4
January 1966	74.0
February 1966	75.2
March 1966	77.4
April 1966	82.2
May 1966	89.3
June 1966	84.3
July 1966	65.5
August 1966	38.5
September 1966	21.1
October 1966	22.4
November 1966	35.6
December 1966	44.8
January 1967	52.1
February 1967	59.3
March 1967	63.2
April 1967	68.6
May 1967	75.1
June 1967	90.9
July 1967	86.3
August 1967	59.8
September 1967	36.2
October 1967	31.8
November 1967	27.8
December 1967	24.9
January 1968	29.9
February 1968	36.2
March 1968	49.6
April 1968	62.7
May 1968	76.0
June 1968	89.5
July 1968	80.3
August 1968	53.1
September 1968	37.7
October 1968	39.2
November 1968	54.8
December 1968	68.4
January 1969	69.5
February 1969	66.0
March 1969	42.4
April 1969	36.8
May 1969	69.0
June 1969	89.9
July 1969	88.2
August 1969	64.1
September 1969	36.9
October 1969	29.4
November 1969	41.8
December 1969	48.0
January 1970	53.7
February 1970	67.3
March 1970	76.4
April 1970	76.6
May 1970	86.7
June 1970	91.1
July 1970	77.4
August 1970	55.5
September 1970	41.5
October 1970	42.5
November 1970	53.3
December 1970	64.3
January 1971	74.0
February 1971	76.9
March 1971	76.0
April 1971	72.1
May 1971	77.9
June 1971	90.7
July 1971	82.9
August 1971	59.1
September 1971	46.8
October 1971	45.0
November 1971	51.4
December 1971	59.9
January 1972	70.1
February 1972	71.2
March 1972	70.3
April 1972	81.7
May 1972	80.1
June 1972	90.7
July 1972	76.7
August 1972	53.5
September 1972	37.7
October 1972	36.7
November 1972	49.5
December 1972	61.3
January 1973	73.9
February 1973	76.0
March 1973	61.4
April 1973	55.9
May 1973	81.5
June 1973	90.6
July 1973	81.5
August 1973	64.8
September 1973	51.6
October 1973	46.8
November 1973	44.0
December 1973	52.7
January 1974	62.4
February 1974	64.5
March 1974	64.8
April 1974	59.5
May 1974	76.4
June 1974	90.0
July 1974	77.0
August 1974	56.6
September 1974	36.4
October 1974	33.8
November 1974	48.7
December 1974	61.9
January 1975	70.4
February 1975	79.4
March 1975	81.1
April 1975	68.1
May 1975	48.9
June 1975	77.7
July 1975	89.9
August 1975	75.3
September 1975	59.2
October 1975	50.7
November 1975	49.9
December 1975	52.8
January 1976	51.5
February 1976	54.1
March 1976	59.2
April 1976	70.8
May 1976	79.5
June 1976	81.2
July 1976	61.5
August 1976	39.4
September 1976	20.3
October 1976	17.4
November 1976	31.6
December 1976	44.1
January 1977	47.5
February 1977	56.3
March 1977	60.6
April 1977	65.0
May 1977	64.9
June 1977	65.7
July 1977	49.8
August 1977	33.3
September 1977	24.4
October 1977	32.3
November 1977	42.4
December 1977	46.3
January 1978	49.8
February 1978	53.5
March 1978	58.7
April 1978	71.5
May 1978	84.5
June 1978	90.5
July 1978	79.5
August 1978	55.1
September 1978	42.8
October 1978	42.5
November 1978	52.4
December 1978	64.7
January 1979	75.9
February 1979	79.9
March 1979	79.4
April 1979	74.0
May 1979	81.8
June 1979	87.1
July 1979	64.0
August 1979	40.7
September 1979	21.1
October 1979	9.26
November 1979	18.1
December 1979	31.2
January 1980	46.6
February 1980	59.7
March 1980	67.0
April 1980	57.3
May 1980	70.6
June 1980	90.0
July 1980	85.1
August 1980	60.4
September 1980	44.2
October 1980	42.4
November 1980	52.1
December 1980	62.0
January 1981	67.0
February 1981	69.7
March 1981	73.7
April 1981	80.1
May 1981	89.2
June 1981	89.1
July 1981	63.2
August 1981	36.5
September 1981	22.7
October 1981	25.7
November 1981	40.0
December 1981	51.0
January 1982	57.1
February 1982	61.6
March 1982	66.2
April 1982	29.6
May 1982	54.7
June 1982	88.7
July 1982	88.6
August 1982	72.5
September 1982	53.1
October 1982	64.9
November 1982	64.5
December 1982	58.3
January 1983	59.8
February 1983	63.1
March 1983	63.3
April 1983	52.3
May 1983	60.2
June 1983	91.7
July 1983	90.6
August 1983	77.4
September 1983	65.7
October 1983	32.9
November 1983	49.5
December 1983	55.3
January 1984	26.7
February 1984	21.4
March 1984	37.9
April 1984	39.5
May 1984	52.5
June 1984	89.1
July 1984	90.6
August 1984	82.6
September 1984	59.2
October 1984	37.7
November 1984	51.8
December 1984	73.5
January 1985	76.0
February 1985	55.0
March 1985	55.1
April 1985	61.4
May 1985	86.3
June 1985	90.2
July 1985	74.4
August 1985	52.3
September 1985	32.9
October 1985	37.3
November 1985	55.1
December 1985	70.6
January 1986	71.7
February 1986	67.6
March 1986	39.1
April 1986	32.1
May 1986	53.0
June 1986	82.6
July 1986	89.5
August 1986	73.5
September 1986	60.3
October 1986	58.0
November 1986	72.5
December 1986	76.9
January 1987	77.2
February 1987	77.7
March 1987	81.0
April 1987	84.0
May 1987	86.0
June 1987	82.8
July 1987	62.9
August 1987	45.2
September 1987	27.5
October 1987	21.3
November 1987	33.7
December 1987	47.4
January 1988	60.3
February 1988	68.3
March 1988	73.9
April 1988	81.4
May 1988	88.6
June 1988	77.7
July 1988	50.6
August 1988	25.5
September 1988	9.83
October 1988	16.9
November 1988	34.0
December 1988	48.6
January 1989	54.6
February 1989	59.1
March 1989	67.5
April 1989	78.4
May 1989	88.5
June 1989	81.0
July 1989	53.0
August 1989	33.7
September 1989	24.1
October 1989	14.4
November 1989	22.0
December 1989	32.1
January 1990	42.9
February 1990	52.9
March 1990	65.5
April 1990	77.8
May 1990	80.5
June 1990	76.7
July 1990	63.8
August 1990	40.9
September 1990	14.8

Rate and persistence

-0.77 Mm³

Mean drawdown per month over 12 months

2 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

Echo Reservoir At Echo, UT

Gauge location

Where this comes from

719 monthly observations 1930–1990 Mm³

Spatially aggregatedHigh confidenceSeptember 1990

Source: USGS — National Water Information System, 10131500. 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.