North Brook — monitoring and records

The monitoring network on this water

Hydrionis holds 1,443 values from 4 gauges on this water. Discharge is a property of a gauge and its reach, not of this water as a whole, so this page reports the network and its records rather than a single figure.

Gauges

1,443

Values held

1969–2026

Record spans

Gauges on the North Brook

4 monitoring points, positioned as the publisher records them.

The seasonal shape

An annual mean says how much water a river carried. A monthly record says when — and on most rivers the difference between a wet winter and a dry summer is larger than the difference between one year and the next.

Monthly mean flow at North Brook at North Brook

Each month's mean discharge as the publisher computed it, which shows the seasonal shape an annual mean flattens away. 1969–2026.

Show relevant events (4 events)Shading marks when something was recorded, not what caused the line.

Taken as the publisher computes it rather than recomputed by Hydrionis from daily values: the publisher knows which of its readings passed validation. Months the gauge did not cover are absent rather than interpolated, and the line breaks where they fall.

What the shaded periods are (4 events)

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
The 1976 drought	Drought declaration	1975-05-01 – 1976-08-31	Documented record	Compiled record
Yorkshire drought	Drought declaration	1995-04-01 – 1996-03-31	Documented record	Compiled record
The 2022 drought	Drought declaration	2022-03-01 – 2022-10-31	Documented record	Compiled record
European drought	Drought declaration	2022-05-01 – 2022-10-31	Documented record	Compiled record

Not shown on this chart

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.
Hurricane Katrina water and sanitation collapse — 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	North Brook at North Brook (m³/s)
1969	0.519
1970	0.352
1971	0.219
1972	0.202
1973	0.153
1974	0.110
1975	0.296
1976	0.061
1977	0.432
1978	0.172
1979	0.376
1980	0.346
1981	0.241
1982	0.326
1983	0.279
1984	0.154
1985	0.205
1986	0.406
1987	0.365
1988	0.485
1989	0.107
1990	0.258
1991	0.142
1992	0.175
1993	0.536
1994	0.774
1995	0.336
1996	0.133
1997	0.201
1998	0.832
1999	0.615
2000	0.323
2001	0.717
2002	0.205
2003	0.964
2004	0.255
2005	0.199
2006	0.124
2007	0.297
2008	0.513
2009	0.346
2010	0.320
2011	0.194
2012	0.067
2013	0.829
2014	0.623
2015	0.331
2016	0.311
2017	0.196
2018	0.166
2019	0.129
2020	0.634
2021	0.887
2022	0.181
2023	0.426
2024	1.10
2025	0.607
2026	0.618

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	Environment Agency — Hydrology Data Explorer API · Open Government Licence v3.0
How the values came to exist	Measured
Period held	1969–2026
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1969 to 2026 is held.
Last read from the publisher	2026-08-24
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 here

Gauges on the North Brook and what each holds
Gauge	Measures	Values	Record
North Brook at North Brook	mean river flow, mean monthly river flow	718	1969–2026
NORTH BROOK	ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa	335	1989–2026
NORTH BROOK	ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa	225	1989–2017
NORTH BROOK	ept family richness, life flow index (family level), proportion of sediment-sensitive invertebrates, whpt average score per taxon, whpt number of scoring taxa	165	2006–2021

How these gauges were attached to this water

Named by the publisher Each gauge here names this water in the publisher’s own station record. Hydrionis has not inferred the connection from station names.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
North Brook at North Brook	Stated by the publisher — Environment Agency hydrology station register, riverName field — https://environment.data.gov.uk/hydrology/id/stations	2026-08-26
NORTH BROOK	Stated by the publisher on the record this gauge’s observations came from.	With the observations
NORTH BROOK	Stated by the publisher on the record this gauge’s observations came from.	With the observations
NORTH BROOK	Stated by the publisher on the record this gauge’s observations came from.	With the observations

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	58	yes, 20 or more
Values held	1,443	yes, 1000 or more
Distinct measurements	7	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-ea-eb97fa6f-d2c5-49db-8829-7b994b0a68be.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

Attribution you are required to give

These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.

Contains public sector information licensed under the Open Government Licence v3.0.

Environment Agency — Open Government Licence v3.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), North Brook gauge records, accessed 2026-09-02, hydrionis.com/waters/england-north-brook/

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 North Brook 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.

Where these figures come from

Spatially aggregatedHigh confidence2025

Source: EA — Hydrology Data Explorer API, EA measure eb97fa6f-d2c5-49db-8829-7b994b0a68be-flow-m-86400-m3s-qualified. Licence: Open — attribution required (attribution required).

Method: Mean of the twelve monthly means for the year. Computed from months rather than from daily readings directly, so that a year with uneven observation is not weighted toward its best-observed months. Years with any month missing are not published.

Aggregated by Hydrionis from daily mean flow published by the Environment Agency under the Open Government Licence v3.0.

Retrieved 24 August 2026.