The monitoring network within this area

Hydrionis holds 1,382 values from 4 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

1,382

Values held

1893–2026

Record spans

Gauges within the Lower Androscoggin River huc8 subbasin

4 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 Androscoggin River at Rumford, Maine

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1893–2024.

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	Androscoggin River at Rumford, Maine (m³/s)
1893	1,237
1894	722
1895	1,792
1896	1,266
1897	745
1898	544
1899	782
1900	796
1901	1,062
1903	869
1904	592
1905	569
1906	501
1907	773
1909	767
1910	464
1911	487
1912	552
1913	620
1914	776
1915	555
1916	634
1917	985
1919	473
1920	603
1921	547
1922	711
1923	1,099
1924	850
1926	663
1927	377
1929	714
1930	668
1931	657
1932	779
1933	796
1934	776
1935	617
1936	2,095
1937	866
1938	827
1939	750
1940	1,045
1941	470
1942	864
1943	725
1944	770
1945	847
1946	521
1947	728
1948	504
1949	396
1950	1,085
1952	844
1953	1,716
1954	937
1955	694
1956	501
1957	425
1958	1,056
1959	510
1961	481
1962	646
1963	1,022
1964	264
1966	428
1968	997
1969	915
1971	881
1972	753
1973	1,189
1974	496
1976	926
1978	663
1979	1,365
1980	872
1981	909
1982	767
1983	691
1984	1,331
1985	357
1986	1,144
1987	1,809
1988	569
1989	1,322
1990	742
1991	643
1993	1,127
1994	765
1995	326
1996	852
1998	1,008
1999	1,099
2000	988
2002	903
2003	524
2005	949
2006	903
2008	850
2010	796
2011	1,152
2012	937
2014	1,263
2015	685
2016	524
2017	787
2019	1,181
2020	702
2021	470
2023	1,150
2024	597

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	1893–2024
Completeness	84.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	21 separate periods inside 1893–2024 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1893 and is not continuous from it: 132 years separate the first value from the last, and 84% 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 Androscoggin River at Rumford, Maine, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1900–2025.

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	Androscoggin River at Rumford, Maine (mm)
1900	646
1901	709
1902	736
1906	507
1907	658
1908	532
1909	548
1910	482
1911	367
1912	563
1913	645
1914	488
1915	427
1916	652
1917	688
1918	559
1919	553
1920	612
1921	494
1922	629
1923	541
1924	588
1925	623
1926	544
1927	618
1928	698
1929	607
1930	578
1931	513
1932	651
1933	663
1934	610
1935	613
1936	813
1937	809
1938	675
1939	597
1940	578
1941	391
1942	564
1943	735
1944	595
1945	794
1946	630
1947	755
1948	507
1949	464
1950	649
1951	733
1952	644
1953	670
1954	967
1955	645
1956	551
1957	483
1958	735
1959	720
1960	736
1961	538
1962	634
1963	630
1964	506
1965	379
1966	542
1967	507
1968	578
1969	902
1970	677
1971	574
1972	629
1973	909
1974	816
1975	545
1976	777
1977	726
1978	705
1979	623
1980	450
1981	650
1982	647
1983	749
1984	784
1985	515
1986	660
1987	617
1988	566
1989	701
1990	796
1991	735
1992	572
1993	611
1994	602
1995	589
1996	1,074
1997	736
1998	816
1999	720
2000	752
2001	503
2002	564
2003	680
2004	627
2005	983
2006	863
2007	784
2008	1,002
2009	830
2010	814
2011	921
2012	699
2013	733
2014	756
2015	624
2016	546
2017	811
2018	684
2019	831
2020	735
2021	453
2022	618
2023	975
2024	734
2025	611

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	1900–2025
Completeness	97.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1900–2025 holds no value: 1903 to 1905, 3 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1900 and is not continuous from it: 126 years separate the first value from the last, and 98% of the years between them are held. The span is not the record.
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 Lower Androscoggin River and what each holds
Gauge	Measures	Values	Record
Androscoggin River at Rumford, Maine	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	417	1893–2026
Little Androscoggin River near South Paris, Maine	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	349	1913–2026
Swift River near Roxbury, Maine	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	325	1929–2026
Androscoggin River near Auburn, Maine	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	291	1929–2026

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 — 01040002. 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
Androscoggin River at Rumford, Maine	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
Little Androscoggin River near South Paris, Maine	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 near Roxbury, Maine	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
Androscoggin River near Auburn, Maine	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	4	yes, 3 or more
Years spanned	134	yes, 20 or more
Values held	1,382	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-01054500.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), Lower Androscoggin River gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lower-androscoggin-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 Lower Androscoggin 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 confidence2024-12-12

Source: USGS — National Water Information System, USGS site 01054500, 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.