Live levels from 19 monitoring stations across Bournemouth, Christchurch and Poole, Dorset, Essex, Kent, Staffordshire…, updated every 15 minutes.
⚠️ Several distinct UK rivers share the name “River Stour” — sections below are grouped by catchment.
Gauges
River Stour — Dorset Stour
6 stations in this catchment
| Station | Town | Level now | Status | Trend |
|---|
| Gillingham Le Neubourg Way | Gillingham | 0.39 m 1h ago | Normal | — |
| ↓ 33.8 km by river |
| Hammoon | Hammoon | 0.16 m 1h ago | Normal | — |
| ↓ 17.3 km by river |
| Blandford | Blandford St Mary | 0.07 mASD 1h ago | Low | — |
| ↓ 24.7 km by river |
| Wimborne | Oakley | 0.40 m 1h ago | Low | — |
| ↓ 16.2 km by river |
| Throop | Throop | 0.34 m 1h ago | Low | — |
| ↓ 5.9 km by river |
| Iford Bridgetidal | Pokesdown | 0.14 mAOD 1h ago | Normal | ▼ |
River Stour — Essex
5 stations in this catchment
| Station | Town | Level now | Status | Trend |
|---|
| Kedington | Sturmer | 0.13 mASD 1h ago | Normal | — |
| ↓ 19.0 km by river |
| Westmill | Pentlow | 0.27 mASD 1h ago | Normal | — |
| ↓ downstream, distance by river not measured |
| Lamarsh | Lamarsh | 0.35 mASD 1h ago | Normal | — |
| ↓ 3.1 km by river |
| Bures Bridge | Bures | 0.27 mASD 1h ago | Normal | — |
| ↓ 15.8 km by river |
| Langham | Thorington Street | 0.22 mASD 1h ago | Normal | — |
River Stour — Stour and Worcestershire Middle Severn
6 stations in the Stour and Worcestershire Middle Severn catchments, one river on the river map, so one list.
| Station | Town | Level now | Status | Trend |
|---|
| Halesowen Dogkennel Lane | Halesowen Dogkennel Lane | 0.09 mASD 1h ago | Normal | — |
| ↓ 2.8 km by river |
| Halesowen | Halesowen | 0.52 mASD 1h ago | Normal | — |
| ↓ 7.2 km by river |
| Stourbridge | Stourbridge | 0.17 mASD 1h ago | Normal | — |
| ↓ 7.9 km by river |
| Stourton | Stourton | 0.08 mASD 1h ago | Low | ▽ |
| ↓ 14.3 km by river |
| Puxton | Kidderminster | 0.70 mASD 1h ago | Normal | ▽ |
| Sandwich Quaytidalplace estimated | Sandwich | 1.17 mAOD 1h ago | Normal | ▼ |
River Stour — Warwickshire Avon
2 stations in this catchment
| Station | Town | Level now | Status | Trend |
|---|
| Shipston | Shipston-On-Stour | 0.33 mASD 1h ago | Normal | ▲ |
| ↓ 18.3 km by river |
| Wimpstone | Wimpstone, Stratford-upon-Avon | 0.68 mASD 1h ago | Normal | — |
Also on the Stour by the river map, but filed under another river name: KEDINGTON FGS.
Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.
Contains OS data © Crown copyright and database rights 2026.
Gauged tributaries
Streams and rivers with a gauge whose water joins the Stour above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
River Stour — Dorset Stour
7 gauged tributaries, 15 gauges
Joins the Stour between Gillingham Le Neubourg Way and Hammoon, no more than 31.1 km by river above Hammoon.
Its water passes Hammoon and every gauge below it on the Stour. It does not pass Gillingham Le Neubourg Way or the gauges above it.
Joins the Stour between Gillingham Le Neubourg Way and Hammoon, no more than 34.7 km by river above Hammoon.
Its water passes Hammoon and every gauge below it on the Stour. It does not pass Gillingham Le Neubourg Way or the gauges above it.
Gauged streams joining the Lodden
Shreen Water name from the river map
Joins the Stour between Gillingham Le Neubourg Way and Hammoon, no more than 35.8 km by river above Hammoon.
Its water passes Hammoon and every gauge below it on the Stour. It does not pass Gillingham Le Neubourg Way or the gauges above it.
Joins the Stour between Hammoon and Blandford, no more than 5.9 km by river above Blandford.
Its water passes Blandford and every gauge below it on the Stour. It does not pass Hammoon or the gauges above it.
Joins the Stour between Blandford and Wimborne, no more than 3.0 km by river above Wimborne.
Its water passes Wimborne and every gauge below it on the Stour. It does not pass Blandford or the gauges above it.
River Winterborne name from the river map
Joins the Stour between Blandford and Wimborne, no more than 13.4 km by river above Wimborne.
Its water passes Wimborne and every gauge below it on the Stour. It does not pass Blandford or the gauges above it.
Joins the Stour between Throop and Iford Bridge, no more than 4.8 km by river above Iford Bridge.
Its water passes Iford Bridge and every gauge below it on the Stour. It does not pass Throop or the gauges above it.
Gauged streams joining the Moors River
Where the Stour goes
Below Iford Bridge, its water next reaches Christchurch, a gauge on an unnamed watercourse, 3.6 km by river downstream.
River Stour — Essex
6 gauged tributaries, 9 gauges
Joins the Stour between Kedington and Westmill, no more than 19.5 km by river above Westmill.
Its water passes Westmill and every gauge below it on the Stour. It does not pass Kedington or the gauges above it.
Stour Brook name from the river map
Joins the Stour between Kedington and Westmill, no more than 18.9 km by river above Westmill.
Its water passes Westmill and every gauge below it on the Stour. It does not pass Kedington or the gauges above it.
Belchamp Brook name from the river map
Joins the Stour between Lamarsh and Bures Bridge, no more than 14.9 km by river above Bures Bridge.
Its water passes Bures Bridge and every gauge below it on the Stour. It does not pass Lamarsh or the gauges above it.
Joins the Stour between Lamarsh and Bures Bridge, no more than 19.2 km by river above Bures Bridge.
Its water passes Bures Bridge and every gauge below it on the Stour. It does not pass Lamarsh or the gauges above it.
Chad Brook name from the river map
Joins the Stour between Lamarsh and Bures Bridge, no more than 19.3 km by river above Bures Bridge.
Its water passes Bures Bridge and every gauge below it on the Stour. It does not pass Lamarsh or the gauges above it.
Joins the Stour between Lamarsh and Bures Bridge, no more than 21.0 km by river above Bures Bridge.
Its water passes Bures Bridge and every gauge below it on the Stour. It does not pass Lamarsh or the gauges above it.
Where the Stour goes
No gauge below Langham is known on the river map.
River Stour — Stour and Worcestershire Middle Severn
2 gauged tributaries, 3 gauges
Joins the Stour between Halesowen Dogkennel Lane and Halesowen, no more than 3.2 km by river above Halesowen.
Its water passes Halesowen and every gauge below it on the Stour. It does not pass Halesowen Dogkennel Lane or the gauges above it.
Joins the Stour between Stourbridge and Stourton, no more than 8.3 km by river above Stourton.
Its water passes Stourton and every gauge below it on the Stour. It does not pass Stourbridge or the gauges above it.
River Stour — Warwickshire Avon
No gauged tributary joins the Stour above Wimpstone on the river map. Streams without a gauge are not counted here.
Tributaries and where they join are traced on the river map (OS Open Rivers, edition 2026-04) and the Environment Agency’s links between its gauges. The map holds distances between gauges, not the junctions themselves, so a junction is placed between two gauges, and no further up than the tributary’s own lowest gauge. Contains OS data © Crown copyright and database rights 2026.
River Stour — Dorset Stour
Streams without a gauge
Named streams on the river map that flow into the Stour and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.
River Stour — Essex
Streams without a gauge
River Stour — Stour and Worcestershire Middle Severn
Streams without a gauge
River Stour — Warwickshire Avon
Streams without a gauge
Storm overflows upstream
River Stour — Dorset Stour
60 storm overflows are traced upstream of Iford Bridge, the Stour’s lowest gauge on the river map: on the Stour itself, on its gauged tributaries, and on smaller streams that join above there.
- 0 report discharging now
- 59 not discharging
- 1 offline or silent: 1 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Iford Bridge: 1,234 spills over 13,324 hours in total, across all 60.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Stour includes the smaller streams that join it there. Where a stretch or a tributary has more than 4, the 3 discharging now or nearest its gauge are listed, the rest are counted, and every one is in that gauge’s “Upstream of here” list. Show every overflow in every stretch →
Above Gillingham Le Neubourg Way, the Stour’s highest gauge2 overflows
- Pen Mill Pumping Station Not discharging
Wessex Water · into River Stour · 7.3 km by river above Gillingham Le Neubourg Way · 2025: 0 spills, 0 h - Bourton Water Recycling Centre Not discharging
Wessex Water · into River Stour · 4.7 km by river above Gillingham Le Neubourg Way · 2025: 62 spills, 812 h
Between Gillingham Le Neubourg Way and Hammoon21 overflows
- The Bridge PS Not discharging
Wessex Water · into The River Stour(S) · 5.8 km by river above Hammoon · 2025: 12 spills, 89 h - Sturminster Newton Wrc Not discharging
Wessex Water · into River Stour · 3.3 km by river above Hammoon · 2025: 26 spills, 85 h - Sturminster Newton Wrc Not discharging
Wessex Water · into River Stour · 3.3 km by river above Hammoon · 2025: 22 spills, 335 h
and 18 more: show all 21 overflows on this stretch → All above Hammoon, nearest first →
River Cale, above Wincantonjoins the Stour above Hammoon1 overflow
- Bennetts Field CSO Not discharging
Wessex Water · into River Cale · 120 m by river above Wincanton · 2025: 21 spills, 20 h
River Lodden, above Lodden Bridgejoins the Stour above Hammoon1 overflow
- Motcombe Attenuation Tank Not discharging
Wessex Water · into Tributary Of River Lodden (S) · 4.4 km by river above Lodden Bridge · 2025: 19 spills, 161 h
Shreen Water, above Huntingford Bridgejoins the Stour above Hammoon5 overflows
- Mere Combined Sewer Overflow Not discharging
Wessex Water · into Shreen Water · 2.7 km by river above Huntingford Bridge · 2025: 39 spills, 52 h - Clements Lane Combined Sewer Of Not discharging
Wessex Water · into Shreen Water · 2.7 km by river above Huntingford Bridge · 2025: 23 spills, 217 h - Mere Water Recycling Centre Not discharging
Wessex Water · into Shreen Water · 2.3 km by river above Huntingford Bridge · 2025: 26 spills, 235 h
and 2 more: show all 5 overflows on this stretch → All above Colesbrook, nearest first →
Between Hammoon and Blandford3 overflows
- Haywards Bridge Pumping Station Not discharging
Wessex Water · into Cookwell Brook · 13.2 km by river above Blandford · 2025: 0 spills, 0 h - Shillingstone STW Not discharging
Wessex Water · into Stour(S) · 9.9 km by river above Blandford · 2025: 45 spills, 560 h - Water Lane Pumping Station Not discharging
Wessex Water · into Tributary Of River Stour · 4.9 km by river above Blandford · 2025: 6 spills, 55 h
River Iwerne, above Stourpainejoins the Stour above Blandford2 overflows
- Iwerne Minster Wrc Not discharging
Wessex Water · into River Iwerne · 5.0 km by river above Stourpaine · 2025: 83 spills, 1,816 h - Shroton Pumping Station Not discharging
Wessex Water · into River Iwerne · 2.9 km by river above Stourpaine · 2025: 1 spill, 4.5 h
Between Blandford and Wimborne6 overflows
- Crawford Bridge Pumping Station Not discharging
Wessex Water · into River Stour · 16.9 km by river above Wimborne · 2025: 0 spills, 0 h - Corfe Mullen WwTW Not discharging
Wessex Water · into River Stour · 4.9 km by river above Wimborne · 2025: 30 spills, 227 h - Poole Road Pumping Station Not discharging
Wessex Water · into River Allen (S) · 1.1 km by river above Wimborne · 2025: 0 spills, 0 h
and 3 more: show all 6 overflows on this stretch → All above Wimborne, nearest first →
Between Wimborne and Throop8 overflows
- Church Lane Pumping Station Not discharging
Wessex Water · into River Stour · 4.8 km by river above Throop · 2025: 11 spills, 63 h - Kinson Sewage Treatment Works Not discharging bathing water shellfish water
Wessex Water · into Lower River Stour(S) · 4.2 km by river above Throop · 2025: 12 spills, 55 h - Palmersford STW Not discharging bathing water
Wessex Water · into Lower River Stour(S) · 1.6 km by river above Throop · 2025: 2 spills, 26 h
and 5 more: show all 8 overflows on this stretch → All above Throop, nearest first →
Between Throop and Iford Bridge3 overflows
- Holdenhurst STW Not discharging bathing water
Wessex Water · into River Stour (S) · 2.1 km by river above Iford Bridge · 2025: 4 spills, 20 h - Ashley Road Combined Sewer Overflow Not discharging
Wessex Water · into Trib Of River Stour(S) · 740 m by river above Iford Bridge · 2025: 1 spill, 0.5 h - Cooper Dean Combined Sewer Overflow Not discharging
Wessex Water · into River Stour Via Sws · 630 m by river above Iford Bridge · 2025: 12 spills, 30 h · reaches the river through a sewer, so where it enters is approximate
Moors River, and the streams that join itjoins the Stour above Iford Bridge8 overflows
and 5 more: show all 8 overflows on the Moors River and the streams that join it → All above Hurn Court, nearest first →
Near these gauges, connection not known
Within 3 km of one of the Stour’s gauges in a straight line, but the river map cannot say whether their water reaches it.
- WXW00768 Not discharging bathing water
Wessex Water · 470 m from Iford Bridge in a straight line · several watercourses close by, nothing to choose between them · 2025: 23 spills, 9.7 h - WXW00769 Not discharging bathing water
Wessex Water · 470 m from Iford Bridge in a straight line · several watercourses close by, nothing to choose between them · 2025: 4 spills, 1.6 h - Brook Road Pumping Station Not discharging
Wessex Water · into Tributary Of The River Stour · 820 m from Wimborne in a straight line · no mapped watercourse close enough to be sure · 2025: 2 spills, 6.5 h
8 more near these gauges whose connection is not known.
1 other overflow within 3 km of these gauges is placed below the Stour’s lowest gauge or on another river, so not listed.
River Stour — Essex
14 storm overflows are traced upstream of Langham, the Stour’s lowest gauge on the river map: on the Stour itself, on its gauged tributaries, and on smaller streams that join above there.
- 0 report discharging now
- 13 not discharging
- 1 offline or silent: 1 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Langham: 101 spills over 717 hours in total, across all 14.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Stour includes the smaller streams that join it there.
Above Kedington, the Stour’s highest gauge1 overflow
- Great Wratting Sp Not discharging
Anglian Water · into Tributary Of The River Stour · 5.0 km by river above Kedington · 2025: 9 spills, 59 h
Between Kedington and Westmill1 overflow
- Hundon Water Recycling Centre Not discharging
Anglian Water · into Chilton Brook River Stour Nt · 13.3 km by river above Westmill · 2025: 20 spills, 300 h · placed on the river by its position alone
Bumpstead Brook, above Broad Greenjoins the Stour above Westmill3 overflows
Stour Brook, above STURMER FGSjoins the Stour above Westmill1 overflow
- Haverhill Wrc Not discharging
Anglian Water · into Stour Brook River Stour Nt · 1.9 km by river above STURMER FGS · 2025: 3 spills, 29 h
Between Lamarsh and Bures Bridge4 overflows
- Sudbury The Croft CSO Not discharging bathing water
Anglian Water · into River Stour · 11.9 km by river above Bures Bridge · 2025: 5 spills, 0.8 h - Sudbury Bailey & Coates CSO Not discharging bathing water
Anglian Water · into R Stour · 10.3 km by river above Bures Bridge · 2025: 2 spills, 0.3 h - Sudbury - Great Eastern Road TPS Not discharging bathing water
Anglian Water · into River Stour · 10.1 km by river above Bures Bridge · 2025: 20 spills, 35 h - Sudbury - Cornard Road PS Not discharging bathing water
Anglian Water · into Tributary Of River Stour · 9.9 km by river above Bures Bridge · 2025: 0 spills, 0 h
River Glem, above Glemsfordjoins the Stour above Bures Bridge2 overflows
- Wickhambrook - Brook Cottages TPS Not discharging
Anglian Water · into Trib Of River Glem · 18.3 km by river above Glemsford · 2025: 0 spills, 0 h - Glemsford STW Not discharging
Anglian Water · into River Glem · 3.4 km by river above Glemsford · 2025: 4 spills, 43 h
River Glem, above GLEMSFORD FGS DUAL COMMSjoins the Stour above Bures Bridge1 overflow
- Boxted-Cottage (Suffolk) PS Not discharging
Anglian Water · into Glem - Lower · 5.7 km by river above GLEMSFORD FGS DUAL COMMS · 2025: 3 spills, 40 h
Between Bures Bridge and Langham1 overflow
- Bures Hamlet PS Not discharging
Anglian Water · into River Stour · 15.9 km by river above Langham · 2025: 1 spill, 2.8 h
Near these gauges, connection not known
Within 3 km of one of the Stour’s gauges in a straight line, but the river map cannot say whether their water reaches it.
- Skates Hill PS Not discharging
Anglian Water · into Unnamed Trib River Stour · 390 m from Westmill in a straight line · no mapped watercourse close enough to be sure · 2025: 4 spills, 7.8 h - Steeple Bumpstead PS-Nos.1,2,3 & 4 Not discharging
Anglian Water · into Bumpstead Brook · 1.5 km from Kedington in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 4 spills, 41 h
River Stour — Stour and Worcestershire Middle Severn
48 storm overflows are traced upstream of Puxton, the Stour’s lowest gauge on the river map: on the Stour itself, on its gauged tributaries, and on smaller streams that join above there.
- 0 report discharging now
- 47 not discharging
- 1 offline or silent: 0 monitor offline, 1 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Puxton: 555 spills over 1,989 hours in total, across all 48.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Stour includes the smaller streams that join it there. Where a stretch or a tributary has more than 4, the 3 discharging now or nearest its gauge are listed, the rest are counted, and every one is in that gauge’s “Upstream of here” list. Show every overflow in every stretch →
Between Halesowen Dogkennel Lane and Halesowen1 overflow
- Dudley Road CSO Not discharging
Severn Trent Water · into Illey Brook · 1.7 km by river above Halesowen · 2025: 0 spills, 0 h
Between Halesowen and Stourbridge11 overflows
- Valley Road CSO Not discharging
Severn Trent Water · into River Stour · 2.7 km by river above Stourbridge · 2025: 4 spills, 2.0 h - Stourbridge Road Storm Overflow Not discharging
Severn Trent Water · into River Stour · 1.2 km by river above Stourbridge · 2025: 0 spills, 0 h - Pebble Close CSO Not discharging
Severn Trent Water · into River Stour · 360 m by river above Stourbridge · 2025: 0 spills, 0 h
and 8 more: show all 11 overflows on this stretch → All above Stourbridge, nearest first →
Between Stourbridge and Stourton15 overflows
- High Street Storm Overflow Not discharging
Severn Trent Water · into River Stour · 5.7 km by river above Stourton · 2025: 17 spills, 28 h - Windsor Grove CSO Not discharging
Severn Trent Water · into Wordsley Brook · 5.1 km by river above Stourton · 2025: 3 spills, 1.2 h - Kingsway Pumping Station Not discharging
Severn Trent Water · into River Stour · 4.8 km by river above Stourton · 2025: 1 spill, 0.6 h
and 12 more: show all 15 overflows on this stretch → All above Stourton, nearest first →
Smestow Brook, and the streams that join itjoins the Stour above Stourton15 overflows
and 12 more: show all 15 overflows on Smestow Brook and the streams that join it → All above Swindon, nearest first →
Between Stourton and Puxton6 overflows
- Roundhill Wastewater Treatment Wrks Not discharging
Severn Trent Water · into River Stour&gallows Brook · 9.3 km by river above Puxton · 2025: 11 spills, 25 h - Kinver STW Not discharging
Severn Trent Water · into River Stour · 8.9 km by river above Puxton · 2025: 0 spills, 0 h - Cookley - Caunsall Road SPS Not discharging
Severn Trent Water · into River Stour · 5.1 km by river above Puxton · 2025: 17 spills, 19 h
and 3 more: show all 6 overflows on this stretch → All above Puxton, nearest first →
Near these gauges, connection not known
Within 3 km of one of the Stour’s gauges in a straight line, but the river map cannot say whether their water reaches it.
- Bromsgrove Road CSO Not discharging
Severn Trent Water · into Tributary Of River Stour · 1.7 km from Halesowen Dogkennel Lane in a straight line · no mapped watercourse close enough to be sure · 2025: 16 spills, 25 h - Dingle Road Combined Sewer Overflow Not discharging
Severn Trent Water · into Tributary Of River Stour · 1.8 km from Stourbridge in a straight line · no mapped watercourse close enough to be sure · 2025: 12 spills, 1.2 h - Old Hill Combined Sewer Overflow Not discharging
Severn Trent Water · into Mousesweet Brook · 1.8 km from Halesowen in a straight line · its watercourse is not on the river map · 2025: 0 spills, 0 h
19 more near these gauges whose connection is not known.
13 other overflows within 3 km of these gauges are placed below the Stour’s lowest gauge or on another river, so not listed.
River Stour — Warwickshire Avon
9 storm overflows are traced upstream of Wimpstone, the Stour’s lowest gauge on the river map: on the Stour itself, on its gauged tributaries, and on smaller streams that join above there.
- 0 report discharging now
- 9 not discharging
- 0 offline or silent: 0 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Wimpstone: 199 spills over 1,888 hours in total, across all 9.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Stour includes the smaller streams that join it there.
Above Shipston, the Stour’s highest gauge5 overflows
- Chipping Campden STW Not discharging
Severn Trent Water · into Cam Brook · 19.6 km by river above Shipston · 2025: 25 spills, 179 h - Sheafhouse Farm CSO Not discharging
Severn Trent Water · into Blockley Brook · 17.4 km by river above Shipston · 2025: 4 spills, 18 h - Blockley Sewage Treatment Works Not discharging
Severn Trent Water · into Blockley Brook · 16.2 km by river above Shipston · 2025: 32 spills, 480 h - Banbury - Orchard Close (CSO) Not discharging
Severn Trent Water · into Sutton Brook · 13.5 km by river above Shipston · 2025: 32 spills, 134 h - Cherington STW Not discharging
Severn Trent Water · into River Stour · 9.0 km by river above Shipston · 2025: 44 spills, 568 h
Between Shipston and Wimpstone4 overflows
- Adj. Tysoe STW - Stm/Emerg O/F Not discharging
Severn Trent Water · into Tysoe Brook · 25.8 km by river above Wimpstone · 2025: 5 spills, 15 h · placed on the river by its position alone - Caudlewell Pumping Station Not discharging
Severn Trent Water · into River Stour · 17.3 km by river above Wimpstone · 2025: 29 spills, 304 h - Mill Lane Pumping Station Not discharging
Severn Trent Water · into River Stour (Avon) · 9.6 km by river above Wimpstone · 2025: 11 spills, 71 h - Mill House Pumping Station Not discharging
Severn Trent Water · into River Stour (Avon) · 7.7 km by river above Wimpstone · 2025: 17 spills, 120 h
A status is the water company’s own monitor: it says whether an overflow is discharging, never how much or why, and a spill does not by itself explain a change in a river level. A status older than two hours is shown as unknown. Annual figures are the official returns: 12/24-hour spills for England and Wales, overflow events for Scotland (Scottish Water counts differently, so the two cannot be compared). “No data” means the monitor produced no usable data that year, not zero. Overflows are placed on OS Open Rivers (edition 2026-04), which leaves out many small channels: an overflow the map cannot place may still drain here. Contains OS data © Crown copyright and database rights 2026. Sewage in Britain’s rivers →
Live status: © Wessex Water storm overflow activity data, licensed under CC BY 4.0. Live status: © Anglian Water storm overflow activity data, licensed under CC BY 4.0. Live status: © Severn Trent Water storm overflow activity data, licensed under CC BY 4.0. Annual figures for England: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence v3.0.