The monitoring network within this area

Hydrionis holds 728 values from 3 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

728

Values held

1913–2026

Record spans

Gauges within the Farmington River huc8 subbasin

3 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 WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, MA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1913–2025.

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	WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, MA (m³/s)
1913	90.6
1915	73.6
1917	53.8
1918	28.6
1919	71.9
1920	67.7
1921	71.4
1922	62.3
1923	51.0
1924	112
1925	58.0
1926	49.3
1927	51.5
1929	73.3
1930	31.1
1931	41.1
1932	56.1
1934	63.7
1935	86.6
1936	257
1937	92.9
1938	524
1939	62.9
1940	64.6
1941	41.1
1942	70.8
1943	73.9
1945	69.4
1946	42.5
1947	52.7
1948	90.0
1950	36.0
1952	115
1953	91.7
1954	120
1955	971
1957	42.8
1959	69.1
1960	94.6
1961	83.3
1962	71.1
1963	40.8
1965	16.8
1966	27.6
1967	45.3
1968	64.8
1969	121
1970	41.1
1971	37.9
1972	73.3
1973	51.8
1975	89.5
1976	106
1977	92.9
1978	92.0
1979	95.7
1980	170
1981	134
1982	66.3
1983	113
1984	219
1985	154
1986	45.3
1987	244
1988	41.3
1989	143
1990	94.6
1992	43.9
1993	73.3
1994	57.2
1996	127
1998	49.3
1999	103
2000	66.5
2002	33.7
2003	65.7
2004	95.7
2005	98.3
2007	215
2008	70.5
2009	108
2010	68.8
2011	490
2013	56.4
2014	45.3
2016	51.5
2017	32.8
2018	92.0
2019	52.7
2021	119
2023	115
2025	47.9

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	1913–2025
Completeness	81.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	21 separate periods inside 1913–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1913 and is not continuous from it: 113 years separate the first value from the last, and 81% 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 WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, 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. 1914–2025.

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	WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, MA (mm)
1914	582
1915	620
1916	728
1917	538
1918	535
1919	644
1920	921
1921	593
1922	659
1923	696
1924	697
1925	572
1926	693
1927	1,108
1928	906
1929	761
1930	398
1931	517
1932	593
1933	696
1934	751
1935	586
1936	740
1937	835
1938	980
1939	602
1940	616
1941	407
1942	701
1943	714
1944	506
1945	969
1946	526
1947	588
1948	801
1949	551
1950	629
1951	831
1952	768
1953	752
1954	743
1955	1,152
1956	716
1957	394
1958	733
1959	646
1960	783
1961	640
1962	420
1963	480
1964	430
1965	257
1966	458
1967	602
1968	648
1969	829
1970	590
1971	690
1972	1,008
1973	931
1974	742
1975	927
1976	727
1977	901
1978	663
1979	1,002
1980	498
1981	480
1982	713
1983	910
1984	895
1985	506
1986	654
1987	720
1988	611
1989	763
1990	816
1991	565
1992	638
1993	778
1994	736
1995	616
1996	1,245
1997	607
1998	709
1999	715
2000	725
2001	541
2002	487
2003	918
2004	770
2005	846
2006	859
2007	647
2008	1,120
2009	844
2010	791
2011	1,234
2012	508
2013	722
2014	865
2015	551
2016	434
2017	577
2018	1,109
2019	722
2020	590
2021	936
2022	615
2023	975
2024	682
2025	501

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	1914–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1914 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 Farmington River and what each holds
Gauge	Measures	Values	Record
WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, MA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	373	1913–2026
NEPAUG R NR NEPAUG, CT.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	190	1921–2026
CLEAR BK NR COLLINSVILLE, CT.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	165	1921–2026

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 — 01080207. 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
WEST BRANCH FARMINGTON RIVER NEAR NEW BOSTON, 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
NEPAUG R NR NEPAUG, CT.	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
CLEAR BK NR COLLINSVILLE, CT.	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 4 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	3	yes, 3 or more
Years spanned	114	yes, 20 or more
Values held	728	no
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-01185500.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), Farmington River gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-farmington-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 Farmington 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 confidence2025-05-06

Source: USGS — National Water Information System, USGS site 01185500, 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.