Colnebrook
- EA ecology area
- Hertfordshire and North London
- Waterbody IDs
- GB106039023010
- Catchments
- Colne
Colnebrook fishing evidence · Hertfordshire and North London
What fish are in the Colnebrook?
Monitoring has recorded 22 species across 8 surveyed sites on this water, between 1986 and 2025. These are survey records with dates. They do not establish what is present today, that the water is fishable, or that you have permission to fish it.
River evidence passport
Four signals, kept deliberately separate.
The passport shows identity, survey breadth, evidence freshness and trip constraints without turning unlike facts into an opaque “best river” score.
8 sites · 41 events
22 positive taxa aggregates are shown. More survey coverage is not a fishing-quality verdict.
Latest 3 Jun 2025
- Within 2 years
- 1 sites
- 3–5 years
- 1 sites
- 6–10 years
- 0 sites
- Older
- 6 sites
Permission is not established
Survey evidence carries no access boundary, permit, opening status, catch forecast or live safety signal. Resolve each before travelling.
Search current river conditions & alerts → Compare this evidence with another river → England coarse close season →Recorded species
What monitoring has found here
Ordered by how many sites on this water recorded the species. A species not listed has not been recorded by these surveys — which is not the same as being absent.
- European eelAnguilla anguilla7 siteslatest 14 Jun 2018
- PerchPerca fluviatilis7 siteslatest 3 Jun 2025
- RoachRutilus rutilus7 siteslatest 4 Jun 2024
- ChubLeuciscus cephalus6 siteslatest 3 Jun 2025
- GudgeonGobio gobio6 siteslatest 3 Jun 2025
- BarbelBarbus barbus5 siteslatest 3 Jun 2025
- DaceLeuciscus leuciscus5 siteslatest 4 Jun 2024
- BleakAlburnus alburnus4 siteslatest 3 Jun 2015
- Pike varietiesEsox lucius4 siteslatest 14 Jun 2011
- European eels > elversAnguilla anguilla3 siteslatest 3 Jun 2025
- PikeEsox lucius3 siteslatest 3 Jun 2025
- TenchTinca tinca3 siteslatest 3 Jun 2025
- Common breamAbramis brama2 siteslatest 24 Apr 2010
- MinnowPhoxinus phoxinus2 siteslatest 20 Jun 2023
- BullheadCottus gobio1 sitelatest 20 Jun 2023
- Common [wild] carpCyprinus carpio1 sitelatest 14 Aug 2002
- Common carp varietiesCyprinus carpio1 sitelatest 23 Apr 2010
- European glass eelsAnguilla anguilla1 sitelatest 24 Apr 2010
- Mirror carpCyprinus carpio1 sitelatest 14 Aug 2002
- Silver breamAbramis bjoerkna1 sitelatest 24 Apr 2010
- Stone loachBarbatula barbatula1 sitelatest 12 Jun 2008
- Tench varietiesTinca tinca1 sitelatest 8 Jun 2010
Surveyed sites on this water
8 shown, newest survey first
Wraysbury
- Survey events
- 8
- Observed taxa
- 11
- Latest survey
- 3 Jun 2025
Thorney Golf Course
- Survey events
- 15
- Observed taxa
- 14
- Latest survey
- 20 Jun 2023
Hythe End
- Survey events
- 13
- Observed taxa
- 17
- Latest survey
- 6 Jun 2014
Horton U/S Backloop
- Survey events
- 1
- Observed taxa
- 3
- Latest survey
- 24 Apr 2010
Horton U/S Site
- Survey events
- 1
- Observed taxa
- 6
- Latest survey
- 24 Apr 2010
Horton D/S site
- Survey events
- 1
- Observed taxa
- 10
- Latest survey
- 23 Apr 2010
Horton Middle Site
- Survey events
- 1
- Observed taxa
- 4
- Latest survey
- 23 Apr 2010
Iver
- Survey events
- 1
- Observed taxa
- 7
- Latest survey
- 15 May 1986
Provenance
Source and licence
- SourceEnvironment Agency Ecology & Fish Data
- LicenceOpen Government Licence v3.0
- Source copy retrieved23 Jul 2026
- Waterbody nameAs published by the Environment Agency
- Not assertedCurrent presence, access, permission, fishing quality or safety