Nichols Reservoir — storage

Storage now, against this reservoir's own record

0.42 Mm³

Stored, September 2026

22nd

Percentile among 46 Seps on record

+181.9%

Change over the 12 months to 2026-09

Storage in September 2026 was lower than most Seps on record, ranked against 46 other Seps held for this reservoir.

No percentage departure from the Sep average is published here. No long-term average is held for this month, so there is nothing to compare with.

Storage, 1965–2026

Monthly mean storage

552 monthly values, 1965 to 2026

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 552 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 552 would be longer than this page and unusable with a screen reader.
Period	Nichols Reservoir Near Santa Fe N Mex (Mm³)
October 1965	0.834
December 1965	0.857
March 1966	0.774
May 1966	0.861
July 1966	0.556
October 1966	0.355
December 1966	0.406
February 1967	0.380
April 1967	0.374
July 1967	0.432
September 1967	0.567
November 1967	0.490
February 1968	0.409
April 1968	0.629
June 1968	0.522
September 1968	0.533
November 1968	0.370
January 1969	0.388
March 1969	0.526
June 1969	0.801
August 1969	0.608
October 1969	0.592
January 1970	0.425
March 1970	0.497
May 1970	0.332
August 1970	0.495
October 1970	0.341
December 1970	0.420
March 1971	0.486
May 1971	0.421
July 1971	0.364
September 1971	0.625
December 1971	0.696
February 1972	0.618
April 1972	0.349
July 1972	0.359
September 1972	0.399
November 1972	0.370
February 1973	0.353
April 1973	0.788
June 1973	0.874
September 1973	0.560
November 1973	0.635
January 1974	0.501
March 1974	0.412
June 1974	0.363
August 1974	0.389
October 1974	0.388
January 1975	0.377
March 1975	0.322
May 1975	0.771
August 1975	0.487
October 1975	0.797
December 1975	0.695
February 1976	0.425
May 1976	0.466
July 1976	0.429
September 1976	0.287
December 1976	0.289
February 1977	0.320
April 1977	0.282
July 1977	0.258
September 1977	0.181
November 1977	0.211
February 1978	0.137
April 1978	0.205
June 1978	0.462
August 1978	0.420
November 1978	0.341
January 1979	0.361
March 1979	0.530
June 1979	0.874
August 1979	0.472
October 1979	0.643
January 1980	0.565
March 1980	0.393
May 1980	0.828
August 1980	0.629
October 1980	0.530
December 1980	0.348
February 1981	0.385
May 1981	0.273
July 1981	0.450
September 1981	0.315
December 1981	0.496
February 1982	0.416
April 1982	0.314
July 1982	0.500
September 1982	0.488
November 1982	0.669
January 1983	0.580
April 1983	0.681
June 1983	0.867
August 1983	0.769
November 1983	0.538
January 1984	0.463
March 1984	0.441
June 1984	0.830
August 1984	0.660
October 1984	0.577
January 1985	0.603
March 1985	0.798
May 1985	0.877
July 1985	0.742
October 1985	0.801
December 1985	0.549
February 1986	0.382
May 1986	0.550
July 1986	0.862
September 1986	0.663
December 1986	0.718
February 1987	0.567
April 1987	0.853
July 1987	0.690
September 1987	0.562
November 1987	0.285
January 1988	0.407
April 1988	0.185
June 1988	0.297
August 1988	0.556
November 1988	0.364
January 1989	0.249
March 1989	0.391
June 1989	0.241
August 1989	0.361
October 1990	0.589
December 1990	0.352
March 1991	0.329
May 1991	0.452
July 1991	0.787
October 2005	0.629
December 2005	0.330
February 2006	0.251
May 2006	0.361
July 2006	0.407
September 2006	0.800
December 2006	0.511
February 2007	0.310
April 2007	0.780
June 2007	0.819
September 2007	0.433
November 2007	0.301
January 2008	0.210
April 2008	0.386
June 2008	0.633
August 2008	0.532
November 2008	0.646
January 2009	0.304
March 2009	0.552
June 2009	0.690
August 2009	0.470
October 2009	0.552
December 2009	0.466
March 2010	0.593
May 2010	0.852
July 2010	0.789
October 2010	0.683
December 2010	0.504
February 2011	0.323
May 2011	0.624
July 2011	0.493
September 2011	0.553
November 2011	0.693
February 2012	0.544
April 2012	0.291
June 2012	0.575
September 2012	0.533
November 2012	0.434
January 2013	0.539
April 2013	0.624
June 2013	0.293
August 2013	0.087
November 2013	0
January 2014	0
March 2014	0
May 2014	0.012
August 2014	0.504
October 2014	0.376
December 2014	0.552
March 2015	0.410
May 2015	0.694
July 2015	0.495
October 2015	0.173
December 2015	0.601
February 2016	0.420
May 2016	0.424
July 2016	0.621
September 2016	0.424
November 2016	0.437
February 2017	0.418
April 2017	0.539
June 2017	0.521
September 2017	0.450
November 2017	0.497
January 2018	0.395
April 2018	0.382
June 2018	0.354
August 2018	0.528
October 2018	0.512
January 2019	0.513
March 2019	0.592
May 2019	0.748
August 2019	0.657
October 2019	0.552
December 2019	0.428
March 2020	0.576
May 2020	0.602
July 2020	0.614
October 2020	0.615
December 2020	0.468
February 2021	0.397
April 2021	0.156
July 2021	0.466
September 2021	0.576
November 2021	0.582
February 2022	0.565
April 2022	0.542
June 2022	0.623
September 2022	0.596
November 2022	0.610
January 2023	0.554
April 2023	0.546
June 2023	0.783
August 2023	0.666
October 2023	0.604
January 2024	0.580
March 2024	0.489
May 2024	0.455
August 2024	0
October 2024	0
December 2024	0
March 2025	0
May 2025	0
July 2025	0.0001
September 2025	0.148
December 2025	0.798
February 2026	0.749
April 2026	0.658
July 2026	0.587
September 2026	0.416

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

+0.02 Mm³

Mean change per month over 12 months

12 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

Nichols Reservoir Near Santa Fe N Mex

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	1965–2026
Completeness	74.2% 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	74% of the months between 1965 and 2026 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-08316500.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), Nichols Reservoir Near Santa Fe N Mex reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-08316500/

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 Nichols Reservoir Near Santa Fe N Mex 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

552 monthly observations 1965–2026 Mm³

Spatially aggregatedHigh confidenceSeptember 2026

Source: USGS — National Water Information System, 08316500. 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.