Cochiti Lake, NM — storage

Storage now, against this reservoir's own record

58.94 Mm³

Stored, September 2017

32nd

Percentile among 45 Seps on record

-6.2%

Against the Sep 1991–2020 average

+5.5%

Change over the 12 months to 2017-09

Storage in September 2017 was around the middle of the Sep record, ranked against 45 other Seps held for this reservoir.

Storage, 1973–2017

Monthly mean storage

537 monthly values, 1973 to 2017

Monthly means of the publisher's daily record. Volume, not percentage of capacity — see below for why.

What the shaded periods are (0 events)

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

240 of 537 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 537 would be longer than this page and unusable with a screen reader.
Period	Cochiti Lake Near Cochiti Pueblo, NM (Mm³)
January 1973	0
March 1973	0
May 1973	0
August 1973	0
October 1973	0
December 1973	7.03
February 1974	5.00
May 1974	5.58
July 1974	4.67
September 1974	4.44
November 1974	5.71
February 1975	4.81
April 1975	15.4
June 1975	35.5
August 1975	47.2
November 1975	57.5
January 1976	64.9
March 1976	58.7
May 1976	58.8
August 1976	58.7
October 1976	58.7
December 1976	58.6
February 1977	58.6
May 1977	58.6
July 1977	58.7
September 1977	58.7
November 1977	58.7
February 1978	58.6
April 1978	58.7
June 1978	58.5
August 1978	72.6
November 1978	72.6
January 1979	70.5
March 1979	70.5
May 1979	74.1
July 1979	148
October 1979	57.0
December 1979	57.3
February 1980	57.1
April 1980	61.3
July 1980	56.9
September 1980	57.1
November 1980	57.3
January 1981	57.1
April 1981	58.1
June 1981	57.0
August 1981	57.2
October 1981	57.1
January 1982	50.1
March 1982	50.1
May 1982	50.9
July 1982	52.2
October 1982	51.6
December 1982	51.9
February 1983	52.5
April 1983	55.3
July 1983	56.2
September 1983	57.0
November 1983	56.6
January 1984	57.2
April 1984	57.6
June 1984	64.7
August 1984	58.8
October 1984	58.4
January 1985	59.9
March 1985	64.1
May 1985	185
July 1985	264
October 1985	218
December 1985	279
February 1986	198
April 1986	147
June 1986	334
September 1986	74.4
November 1986	66.7
January 1987	62.8
March 1987	92.9
June 1987	462
August 1987	203
October 1987	292
December 1987	323
March 1988	185
May 1988	85.0
July 1988	60.1
September 1988	66.6
December 1988	62.5
February 1989	62.8
April 1989	69.2
June 1989	60.7
September 1989	61.9
November 1989	70.6
January 1990	62.4
March 1990	62.7
June 1990	61.4
August 1990	61.7
October 1990	61.2
December 1990	60.9
March 1991	62.8
May 1991	91.2
July 1991	61.2
September 1991	61.0
December 1991	60.5
February 1992	63.2
April 1992	104
June 1992	59.1
August 1992	61.0
November 1992	61.8
January 1993	63.0
March 1993	64.1
May 1993	74.8
August 1993	62.3
October 1993	62.4
December 1993	63.9
February 1994	66.2
May 1994	90.9
July 1994	66.9
September 1994	65.9
November 1994	66.8
February 1995	67.5
April 1995	67.9
June 1995	91.0
August 1995	68.7
November 1995	68.4
January 1996	70.6
March 1996	71.2
May 1996	70.8
August 1996	70.5
October 1996	69.9
December 1996	69.9
February 1997	70.9
May 1997	81.8
July 1997	71.0
September 1997	70.2
November 1997	70.2
February 1998	73.9
April 1998	74.5
June 1998	73.1
August 1998	72.0
October 1998	71.1
January 1999	62.4
March 1999	59.0
May 1999	61.2
July 1999	58.8
October 1999	58.9
December 1999	60.8
February 2000	63.6
April 2000	62.9
July 2000	60.5
September 2000	59.8
November 2000	61.6
January 2001	63.3
April 2001	62.1
June 2001	61.7
August 2001	60.4
October 2001	59.4
January 2002	61.6
March 2002	65.6
May 2002	63.9
July 2002	61.7
October 2002	60.3
December 2002	60.6
February 2003	62.2
April 2003	63.4
July 2003	61.2
September 2003	59.9
November 2003	59.2
January 2004	59.3
April 2004	64.1
June 2004	63.0
August 2004	61.6
October 2004	61.2
December 2004	60.8
March 2005	61.8
May 2005	74.5
July 2005	60.4
September 2005	59.7
December 2005	59.9
February 2006	62.4
April 2006	62.6
June 2006	60.7
September 2006	60.3
November 2006	60.2
January 2007	61.2
March 2007	64.9
June 2007	65.1
August 2007	62.7
October 2007	61.6
December 2007	62.4
March 2008	62.9
May 2008	62.1
July 2008	62.9
September 2008	62.1
December 2008	63.2
February 2009	62.7
April 2009	62.1
June 2009	64.2
September 2009	64.8
November 2009	65.6
January 2010	65.6
March 2010	65.6
June 2010	64.8
August 2010	64.9
October 2010	64.7
December 2010	65.4
March 2011	64.7
May 2011	63.2
July 2011	61.9
September 2011	61.5
November 2011	63.8
February 2012	62.9
April 2012	63.3
June 2012	60.9
August 2012	64.3
November 2012	64.7
January 2013	59.4
March 2013	59.6
May 2013	59.5
August 2013	58.1
October 2013	76.4
December 2013	57.5
February 2014	61.2
May 2014	61.2
July 2014	59.2
September 2014	58.5
November 2014	57.8
February 2015	60.2
April 2015	59.5
June 2015	59.8
August 2015	58.8
November 2015	58.4
January 2016	57.9
March 2016	58.0
May 2016	59.5
August 2016	56.4
October 2016	55.3
December 2016	55.9
February 2017	57.3
May 2017	59.3
July 2017	58.0
September 2017	58.9

The reservoir's year

Seasonal storage profile

Each calendar month's reference average, against the most recent year

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
Period	1991–2020 average (Mm³)	Most recent 12 months (Mm³)
Jan	62.7	55.3
Feb	63.5	57.3
Mar	64.4	58.1
Apr	66.2	57.8
May	68.4	59.3
Jun	69.1	57.6
Jul	65.1	58.0
Aug	62.7	59.3
Sep	62.9	58.9
Oct	63.1	55.3
Nov	62.5	55.6
Dec	62.8	55.9

Why this page shows a volume and not a percentage

Percentage full is a division, and the denominator is missing

“Percentage full” is the figure a drought is discussed in, and it is stored volume divided by capacity. Capacity is published on several different bases — gross, usable, live, and the figure at a particular spillway or licence condition — and dividing a stored volume by the wrong one produces a percentage confidently wrong by the ratio between them, at exactly the moment the number matters most.

Hydrionis holds storage measurements for this reservoir and does not hold a compatible authoritative capacity figure for it, so percentage full is not calculated. The volume above is what was actually measured. Where you need a percentage, take the publisher’s own capacity on its own stated basis and divide it yourself — the source is linked below, and knowing which basis you used is the whole point.

Rate and persistence

+0.26 Mm³

Mean change per month over 12 months

16 of 24

Recent months 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

Cochiti Lake Near Cochiti Pueblo, NM

Gauge location

About this data

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Measured
Period held	1973–2017
Completeness	99.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	Storage is a managed quantity. A falling line can be a rule curve, a scheduled release or a transfer to another system rather than a shortage of water, and nothing here distinguishes them. No capacity figure on a stated basis is held for this reservoir, so no percentage of capacity is computed.
Continuity	99% of the months between 1973 and 2017 are held. Monthly means of the publisher's own daily record.
Last read from the publisher	2026-10-01
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

Use this data

Machine-readable JSON /api/v1/observations/by-subject/reservoir-usgs-08317300.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Suggested citation for Hydrionis

Hydrionis (2026), Cochiti Lake Near Cochiti Pueblo, NM reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-08317300/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Cochiti Lake Near Cochiti Pueblo, NM record changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where this comes from

537 monthly observations 1973–2017 Mm³

Spatially aggregatedHigh confidenceSeptember 2017

Source: USGS — National Water Information System, 08317300. 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 1 October 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.