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South West Water storm overflows

1,361 storm overflows · 1,340 with a live status feed · regulated by the Environment Agency.

Discharging now
11
of 1,331 overflows reporting live
Spills in 2025
46,164
official, from 1,357 monitored overflows
Hours in 2025
407k
total discharge time, 300 h per overflow
Average per overflow
34.0
spills each in 2025 · -18% on 2024 (41.3)

Discharging now

From South West Water's live monitor feed, longest-running first.

Fowey Wastewater Treatment Works Fowey Estuary
16 h 21 minsince 29 Sep, 21:09
39 St Michaels Combined Sewer Of River Kennall
1 h 36 minsince 30 Sep, 11:53
Constantine STW Lestraines River
1 h 35 minsince 30 Sep, 11:54
Hendra Road CSO River Kenwyn
1 h 29 minsince 30 Sep, 12:00
Trelander Highway CSO River Allen
1 h 28 minsince 30 Sep, 12:01
Pauls Terrace CSO River Allen
1 h 27 minsince 30 Sep, 12:03
Victoria Square CSO River Kenwyn
1 h 26 minsince 30 Sep, 12:03
Quenchwell Pumping Station Trib Of Carnon River
1 h 16 minsince 30 Sep, 12:13
Commercial Road Pumping Station The Penryn River
1 h 14 minsince 30 Sep, 12:16
Roberts Ope CSO River Kenwyn[s]
1 h 14 minsince 30 Sep, 12:16
Paradise Road (Graveyard) CSO Stonehouse Creek
1 h 13 minsince 30 Sep, 12:16

Year by year

Spills reported across all of South West Water's monitored overflows.

2021954 sites
34,675 spills · 265k h
20221,157 sites
30,949 spills · 222k h
20231,235 sites
51,530 spills · 450k h
20241,361 sites
56,173 spills · 544k h
20251,357 sites
46,164 spills · 407k h

More overflows were monitored each year (954 in 2021, 1,357 in 2025), so part of any rise is more monitors, not only more spilling.

Official Environment Agency Event Duration Monitoring returns, 12/24-hour counting method (the first 12 hours of a discharge count as one spill, each further 24 hours as one more). Earlier years are matched to today's overflows by name and location, because the EA's site IDs changed between returns; a site that could not be matched is left out of that year rather than guessed.

Most spills in 2025

The overflows that spilled most often. A red tag means discharging right now.

1
Croyde Wastewater Treatment Works Croyde Bay
2531,253 h
2
#n/A Tributary Of Coombe Valley Stream
2434,967 h
3
Salcombe Regis WwTW CSO Salcombe Regis Stream
2355,446 h
4
Horns Cross Sewage Treatment Works Tributary Of River Yeo
2302,035 h
5
Town Quay Pumping Station River Fowey Estuary
198635 h
6
Abbotsham WwTW Kenwith Stream
196205 h
7
Tatworth WwTW Forton Brook
1894,142 h
8
Rewe Wastewater Treatment Works River Culm
1752,568 h
9
High Bickington STW Tributary Of Langham Lake
1731,912 h
10
Brayford STW River Bray
1723,763 h
11
Ashreigny WwTW CSO Trib Of Mully Brook
1671,511 h
12
Gratton CSO River Meavy
1672,124 h
13
St Neot STW St Neot River
1672,031 h
14
Altarnun STW (Storm Tank) Penpont Water
1653,295 h
15
Harewood Road CSO River Tamar
1641,029 h
16
Tiverton STW River Exe
1603,152 h
17
Chacewater STW River Carnon
1593,542 h
18
Greenacres CSO Trib Of The River Teign
1581,651 h
19
39 St Michaels Combined Sewer OfNow River Kennall
1532,439 h
20
Delabole Wastewater Treatment Works River Allen
1482,903 h
21
Honiton Wastewater Treatment Works River Otter
1481,329 h
22
Praze An Beeble STW Praze River
1473,153 h
23
Pyworthy Sewage Treatment Works Derril Water
1462,920 h
24
Merton WwTW CSO Trib Of Little Mere River
1441,461 h
25
Gratton Wastewater Treatment Works River Meavy
1432,485 h

Rivers and seas it discharges into most

Spills in 2025 from South West Water's overflows, by receiving water (names grouped approximately).

1
River Tamar 33 overflows
1,2518,931 h
2
English Channel 19 overflows
7005,701 h
3
River Torridge 13 overflows
6455,324 h
4
River Exe 37 overflows
6255,939 h
5
River Axe 11 overflows
6143,992 h
6
River Plym 21 overflows
5251,600 h
7
River Dart 8 overflows
4763,041 h
8
River Culm 9 overflows
4645,388 h
9
Penryn River 16 overflows
4632,229 h
10
River Tavy 9 overflows
4531,984 h

Concerned about an overflow?

Report pollution you can see to the Environment Agency on 0800 80 70 60 — they log and investigate incidents. Complaints about a company's service go to the company first.

Complain to South West Water ↗ Report pollution ↗ All companies & rankings

Live status: © South West Water storm overflow activity data, licensed under CC BY 4.0. Annual spill figures: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence (OGL) v3.0. FloodRadar republishes the monitors' status and the published figures; it does not measure discharges itself, and a monitor reports a discharge, not its volume or its cause.