The monitoring network within this area

Hydrionis holds 1,612 values from 5 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

Gauges

1,612

Values held

1911–2026

Record spans

Gauges within the Chicopee River huc8 subbasin

5 monitoring points, positioned as the publisher records them.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at SWIFT RIVER AT WEST WARE, MA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1911–2025.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

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

Underlying data
Period	SWIFT RIVER AT WEST WARE, MA (m³/s)
1911	39.1
1912	67.7
1913	53.8
1914	44.2
1915	63.4
1916	55.8
1917	51.0
1918	31.1
1919	38.2
1920	66.3
1921	64.6
1922	55.5
1923	67.7
1924	51.5
1925	45.3
1926	35.4
1927	38.2
1929	46.2
1930	20.4
1931	34.5
1932	56.1
1933	62.3
1934	50.1
1935	43.6
1936	215
1938	157
1940	4.67
1941	2.21
1942	2.61
1943	3.26
1944	3.82
1945	2.52
1946	2.41
1947	18.5
1948	27.4
1949	16.6
1950	4.42
1951	20.6
1952	23.1
1953	50.1
1954	4.98
1955	25.6
1956	53.0
1957	5.21
1958	5.04
1959	6.37
1960	23.9
1961	20.4
1962	4.87
1963	8.47
1964	4.45
1965	4.16
1966	3.60
1968	3.79
1970	4.22
1971	5.35
1972	5.01
1973	4.28
1975	4.25
1976	10.4
1977	3.82
1978	11.4
1979	31.1
1980	8.72
1981	4.16
1982	4.45
1983	34.3
1984	86.9
1985	5.38
1987	3.62
1988	3.91
1989	4.30
1990	3.94
1991	9.54
1992	7.36
1993	16.3
1994	13.0
1996	20.3
1997	35.4
1998	9.77
1999	4.62
2000	6.43
2001	6.31
2002	3.57
2003	4.53
2004	4.19
2005	21.9
2006	37.9
2007	37.4
2008	11.6
2009	22.0
2010	29.2
2011	9.77
2013	4.84
2014	5.49
2015	6.23
2016	3.65
2017	3.51
2018	7.31
2019	46.2
2020	8.86
2021	5.44
2022	14.6
2024	34.5
2025	4.47

About this series

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	1911–2025
Completeness	91.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	10 separate periods inside 1911–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 115 years separate the first value from the last, and 91% of the years between them are held. The span is not the 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

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above QUABOAG RIVER AT WEST BRIMFIELD, MA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1913–2025.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

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

Underlying data
Period	QUABOAG RIVER AT WEST BRIMFIELD, MA (mm)
1913	486
1914	481
1915	442
1916	679
1917	492
1918	425
1919	684
1920	842
1921	533
1922	608
1923	632
1924	563
1925	376
1926	371
1927	679
1928	590
1929	492
1930	223
1931	394
1932	489
1933	633
1934	663
1935	506
1936	745
1937	636
1938	1,047
1939	442
1940	578
1941	260
1942	457
1943	576
1944	395
1945	680
1946	559
1947	469
1948	660
1949	349
1950	424
1951	694
1952	597
1953	746
1954	716
1955	988
1956	594
1957	348
1958	659
1959	621
1960	645
1961	525
1962	498
1963	416
1964	373
1965	235
1966	286
1967	527
1968	503
1969	584
1970	553
1971	451
1972	916
1973	696
1974	651
1975	716
1976	526
1977	616
1978	541
1979	854
1980	438
1981	497
1982	686
1983	832
1984	762
1985	474
1986	562
1987	576
1988	433
1989	660
1990	685
1991	632
1992	498
1993	580
1994	614
1995	487
1996	1,039
1997	548
1998	621
1999	477
2000	582
2001	473
2002	362
2003	775
2004	600
2005	982
2006	763
2007	597
2008	994
2009	651
2010	583
2011	1,095
2012	393
2013	621
2014	607
2015	407
2016	310
2017	505
2018	939
2019	793
2020	549
2021	709
2022	516
2023	912
2024	656
2025	474

About this series

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Derived Computed by Hydrionis
Period held	1913–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1913 to 2025 is held.
Inputs last read	2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date	2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
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

Every gauge Hydrionis holds within this area

Gauges within the Chicopee River and what each holds
Gauge	Measures	Values	Record
QUABOAG RIVER AT WEST BRIMFIELD, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	376	1912–2026
WARE RIVER AT GIBBS CROSSING, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	338	1913–2026
SWIFT RIVER AT WEST WARE, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	324	1911–2026
CHICOPEE RIVER AT INDIAN ORCHARD, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	321	1928–2026
WARE RIVER AT INTAKE WORKS NEAR BARRE, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	253	1928–2026

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 01080204. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
QUABOAG RIVER AT WEST BRIMFIELD, MA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
WARE RIVER AT GIBBS CROSSING, MA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
SWIFT RIVER AT WEST WARE, MA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
CHICOPEE RIVER AT INDIAN ORCHARD, MA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
WARE RIVER AT INTAKE WORKS NEAR BARRE, MA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 5 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	5	yes, 3 or more
Years spanned	116	yes, 20 or more
Values held	1,612	yes, 1000 or more
Distinct measurements	5	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-01176000.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), Chicopee River gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-chicopee-river/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

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 Chicopee River gauge records 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 these figures come from

MeasuredHigh confidence2025-05-10

Source: USGS — National Water Information System, USGS site 01176000, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 1 October 2026.