Roach · Rutilus rutilus

Roach in the Old River Lea

Largest measured roach: 25.9 cm

The largest roach measured in Environment Agency surveys of the Old River Lea was 25.9 cm, recorded at Cornmill Meadows 3 (Mile Nursery) on 6 May 2009.

Across 2,278 measured roach, the median measured length was 9.7 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the Old River Lea.

See roach records across England →

Most recent observation21 May 2026Cornmill Meadows 3 (Mile Nursery) · 40 fish

Largest measured roach: 25.9 cm
Median length: 9.7 cm
Fish measured: 2,278
Survey locations: 2

Individual EA measurements

Largest measured roach

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

Length	Survey date	Survey location	Survey ID
25.9 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
24.6 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
23.2 cm	9 May 2008	Cornmill Meadows 3 (Mile Nursery)	110971
23.2 cm	17 Dec 2004	Cornmill Meadows 3 (Mile Nursery)	83744
22.3 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
21.9 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
21.6 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396
21.5 cm	6 May 2009	Cornmill Meadows 3 (Mile Nursery)	117205
21.2 cm	17 Dec 2004	Cornmill Meadows 3 (Mile Nursery)	83744
20.3 cm	1 May 2007	Cornmill Meadows 3 (Mile Nursery)	105396

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where roach were found

Each point marks a survey location with at least one roach record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyed	First recorded	Last recorded	Visits finding roach
Cornmill Meadows 3 (Mile Nursery)	17 Dec 2004	21 May 2026	15
Cornmill Meadows restoration	10 Apr 2014	10 Apr 2014	1

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

2004–2026

Survey records by year

Each bar shows how many survey visits recorded roach that year.

104

005

006

107

108

109

110

011

012

113

114

115

116

117

118

119

020

021

022

123

124

125

126

Fish measured by surveyors

Measured length distribution

See how the 2,278 measured fish were spread across different length ranges.

Smallest: 2.2 cm
Lower quarter: 7.6 cm
Median: 9.7 cm
Upper quarter: 12.2 cm
Largest: 25.9 cm

0–99 mm

1216

100–199 mm

1049

200–299 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Old River Lea

Compare other species with enough survey and measurement data for a detailed page.

Perch Chub Pike Tench Minnow European eel

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →