Storm overflow register · 2025 annual return

Wessex Water storm overflows, 2025

Wessex Water reported 1,346 storm overflows in England for 2025. Together they recorded 24,442 spills over 190,666 hours, an average of 18.2 spills per overflow against 20.4 across England. That ranks 6 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 45% on 2024.

220 overflows did not spill · 62 spilled more than 60 times · 1,308 had monitors working for 90% of the year or more · 242 sewage treatment works with overflows

Hours spilling by month, 2025

020k40k60k80kJan 2025: 60,197 hours spillingJanFeb 2025: 30,296 hours spillingFebMar 2025: 7,928 hours spillingMarApr 2025: 1,385 hours spillingAprMay 2025: 762 hours spillingMayJun 2025: 472 hours spillingJunJul 2025: 218 hours spillingJulAug 2025: 452 hours spillingAugSep 2025: 2,922 hours spillingSepOct 2025: 1,454 hours spillingOctNov 2025: 18,116 hours spillingNovDec 2025: 66,686 hours spillingDec
Hours spilling, all Wessex Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Wessex Water storm overflows

Sorted by hours spilling. Open an overflow for its permit, location, reasons for high spills and improvement status.

OverflowDischarges toSpills 2025Hours 2025Spills vs 2024Monitor uptime
Ratfyn STW
Storm tank at sewage works
Sewage works
Ratfyn
Company site name
RATFYN STORM TANK
EA ID / permit
WXW00919 · 401500
Outlet location
SU1559042730 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (Upper) d/s Nine Mile River confl (GB108043022352)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Hampshire Avon River 0 0.0 no change 100%
Porlock Weir Pumping Station
Storm discharge at pumping station
Company site name
PORLOCK WEIR
EA ID / permit
WXW00873 · 100353
Outlet location
SS8671048040 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Channel Outer South (GB610807680004)
Bathing water
Porlock Weir
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2017)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · No longer operational as an overflow - permit revoked or to be revoked
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Porlock Bay(C) – – 100%
Affpuddle Pumping Station
Storm discharge at pumping station
Company site name
AFFPUDDLE
EA ID / permit
WXW00064 · 401424
Outlet location
SY8060793678 (OS grid reference) · View on Apple Maps
WFD catchment
Piddle (Lower) (GB108044010080)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tributary of River Piddle 0 0.0 no change 100%
Halves Cottage Pumping Station
Storm discharge at pumping station
Company site name
CORFE CASTLE HALVES COTTAGES
EA ID / permit
WXW00495 · 401428
Outlet location
SY9620181348 (OS grid reference) · View on Apple Maps
WFD catchment
Corfe River (GB108044010020)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
A Tributary of the Corfe River 0 0.0 no change 100%
Wirral Park Pumping Station
Storm discharge at pumping station
Company site name
GLASTONBURY WIRRAL PARK
EA ID / permit
WXW01271 · 103823
Outlet location
ST4909238795 (OS grid reference) · View on Apple Maps
WFD catchment
Brue - Clyce Hole to conf North Drain (GB108052021190)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Glastonbury Mill Stream 0 0.0 no change 100%
Marston Lane Pumping Station
Storm discharge at pumping station
Company site name
FROME COURTS BARTON MARSTON LANE
EA ID / permit
WXW00693 · 102701
Outlet location
ST7637846582 (OS grid reference) · View on Apple Maps
WFD catchment
Nunney Bk - source to conf Mells R (GB109053022000)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tributary of Nunney Brook 0 0.0 no change 100%
Maidenbrook Pumping Station
Storm discharge at pumping station
Company site name
TAUNTON MAIDENBROOK
EA ID / permit
WXW00676 · 070804
Outlet location
ST2452025700 (OS grid reference) · View on Apple Maps
WFD catchment
Tone Ds Taunton (GB108052015482)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Tone 0 0.0 no change 100%
Dugdell Close Pumping Station
Storm discharge at pumping station
Company site name
FERNDOWN DUGDELL CLOSE
EA ID / permit
WXW00384 · 400649
Outlet location
SU0887700616 (OS grid reference) · View on Apple Maps
WFD catchment
Moors (GB108043011050)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Trib of Moors River 0 0.0 no change 100%
Bell Hill SPS
Storm discharge at pumping station
Company site name
SEEND BELL INN / BELL HILL
EA ID / permit
WXW00125 · 102808
Outlet location
ST9402060810 (OS grid reference) · View on Apple Maps
WFD catchment
Semington Bk-Milebourne Str to conf R Avon (Brist) (GB109053022200)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Summerham Brook(S) 0 0.0 no change 100%
Potternewick Pumping Station
Storm discharge at pumping station
Company site name
POTTERNE WICK
EA ID / permit
WXW00883 · 101814
Outlet location
SU0006057740 (OS grid reference) · View on Apple Maps
WFD catchment
Worton Str - source to conf Semington Bk (GB109053022210)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Worton Stream (S) 0 0.0 no change 100%
Swanmoor Bridge Pumping Station
Storm discharge at pumping station
Company site name
PILNING SWANMOOR BRIDGE
EA ID / permit
WXW01098 · 101958
Outlet location
ST5651083380 (OS grid reference) · View on Apple Maps
WFD catchment
Chestle Pill (GB109054026650)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Swanmoor Rhine (S) 0 0.0 no change 100%
Wagg Drove Pumping Station
Storm discharge at pumping station
Company site name
HUISH EPISCOPI WAGG DROVE
EA ID / permit
WXW01181 · 071164
Outlet location
ST4354226832 (OS grid reference) · View on Apple Maps
WFD catchment
King's Sedgemoor Drain - Henley Sluice to mouth (GB108052021150)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Wagg Drove Rhyne 0 0.0 no change 100%
Newbarn Park CSO
Overflow on sewer network
Company site name
TAUNTON NEW BARN QUEENSWAY
EA ID / permit
WXW00794 · 103194
Outlet location
ST2074523409 (OS grid reference) · View on Apple Maps
WFD catchment
Sherford Stream (GB108052015410)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Galmington Stream via SWS 0 0.0 no change 100%
Longacre Close Pumping Station
Storm discharge at pumping station
Company site name
TAUNTON LONGACRE CLOSE
EA ID / permit
WXW00642 · 103187
Outlet location
ST2249626314 (OS grid reference) · View on Apple Maps
WFD catchment
Tone Ds Taunton (GB108052015482)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Kingston Stream(S) 0 0.0 no change 100%
Rumwell Sewage P. Stn
Storm discharge at pumping station
Company site name
RUMWELL
EA ID / permit
WXW00943 · 082085
Outlet location
ST1940023620 (OS grid reference) · View on Apple Maps
WFD catchment
Hele Bk (GB108052015400)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · No longer operational as an overflow - permit revoked or to be revoked
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Unnamed Stream – – 100%
Radipole Lake Pumping Station
Storm discharge at pumping station
Company site name
WEYMOUTH RADIPOLE
EA ID / permit
WXW00910 · 401048
Outlet location
SY6766079210 (OS grid reference) · View on Apple Maps
WFD catchment
WEY (GB510804415700)
Bathing water
Weymouth Central
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2017)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Weymouth Harbour (E) 0 0.0 no change 100%
Pennsylvania Road PS
Storm discharge at pumping station
Company site name
PORTLAND PENNSYLVANIA ROAD
EA ID / permit
WXW00855 · 402253
Outlet location
SY6961071170 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Church Ope Cove
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Ground 0 0.0 no change 100%
Ferrybridge PS
Storm discharge at pumping station
Company site name
WEYMOUTH FERRYBRIDGE PORTLAND ROAD
EA ID / permit
WXW00422 · 402477
Outlet location
SY6659076230 (OS grid reference) · View on Apple Maps
WFD catchment
Fleet Lagoon (GB510080077000)
Bathing water
Portland Harbour Castle Cove; Portland Harbour Sandsfoot Castle
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The Fleet 0 0.0 no change 100%
Clevedon Marine Parade Pumping Stn
Storm discharge at pumping station
Company site name
CLEVEDON MARINE PARADE
EA ID / permit
WXW00300 · 071176
Outlet location
ST4026072080 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
Bathing water
Clevedon Beach
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Severn Estuary(E) 0 0.0 no change 100%
Springfields Pumping Station
Storm discharge at pumping station
Company site name
TETBURY SPRINGFIELDS
EA ID / permit
WXW01033 · 103899
Outlet location
ST8969093420 (OS grid reference) · View on Apple Maps
WFD catchment
Tetbury Avon - source to conf unnamed trib (GB109053027800)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Avon(Tetbury Branch) 0 0.0 no change 100%
Wellow Lane Pumping Station
Storm discharge at pumping station
Company site name
PEASEDOWN ST JOHN WELLOW LANE
EA ID / permit
WXW01205 · 103787
Outlet location
ST7156057060 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - Snails Bk to Bristol Avon (GB109053022271)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
A Trib of the Wellow Brook 0 0.0 no change 100%
The Basins Sewer CSO
Overflow on sewer network
Company site name
WELLINGTON CORAMS LANE
EA ID / permit
WXW01115 · 072548
Outlet location
ST1292520886 (OS grid reference) · View on Apple Maps
WFD catchment
Westford Stream (GB108052015380)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Back Stream via SWS 0 0.0 no change 100%
Bloomfield Rd Junction CSO
Overflow on sewer network
Company site name
BATH WELLSWAY / BLOOMFIELD ROAD JUNCTION BEAR FLAT
EA ID / permit
WXW00149 · 101923
Outlet location
ST7390865093 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Avon via SWS 0 0.0 no change 100%
Rear of 34 Wellsway
Overflow on sewer network
Company site name
BATH WELLSWAY R/O NO 34
EA ID / permit
WXW00921 · 101924
Outlet location
ST7391065090 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Avon 0 0.0 no change 96%
Mount Road CSO
Overflow on sewer network
Company site name
BATH ENGLISHCOMBE LANE O/S 275 JUNCTION WITH MOUNT ROAD
EA ID / permit
WXW00760 · 101927
Outlet location
ST7340864926 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Avon via SWS 0 0.0 no change 100%
Millmead Road CSO
Overflow on sewer network
Company site name
BATH MILLMEAD ROAD NR JUNCTION LYNDHURST ROAD
EA ID / permit
WXW00741 · NPSWQD010270
Outlet location
ST7340664928 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Avon via SWS 0 0.0 no change 100%
Saltwell Viaduct CSO
Overflow on sewer network
Company site name
BRISTOL BRISTOL ROAD / SALTWELL VIADUCT
EA ID / permit
WXW00953 · 100579/CS/01
Outlet location
ST6131468247 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Trib of Brislington Brook 0 0.0 no change 100%
Somerdale Av Salcombe Rd CSO
Overflow on sewer network
Company site name
BRISTOL SOMERDALE AVENUE / SALCOMBE ROAD
EA ID / permit
WXW01004 · 100576/CS/01
Outlet location
ST6027469895 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Brislington Brook via SWS 0 0.0 no change 100%
Wells Road / Priory Road CSO
Overflow on sewer network
Company site name
BRISTOL WELLS ROAD / PRIORY ROAD
EA ID / permit
WXW00034 · 013220
Outlet location
ST6092269972 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Brislington Brook 0 0.0 no change 100%
Broadmead Roundabout CSO
Overflow on sewer network
Company site name
BRISTOL BROADMEAD ON HUB
EA ID / permit
WXW00194 · 101089
Outlet location
ST5921973244 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Monitor below 90%
Telemetry or data archiving failure / issue · Resolved - Jul
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
River Frome 0 0.0 no change 80%
Lewins Mead Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL LEWIN MEAD O/S GREYFRIARS
EA ID / permit
WXW00629 · 101083
Outlet location
ST5871573252 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome via SWS 0 0.0 no change 100%
Nelson Street 1 CSO
Overflow on sewer network
Company site name
BRISTOL NELSON STREET O/S POLICE STATION
EA ID / permit
WXW00781 · 101084
Outlet location
ST5895173265 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome 0 0.0 no change 93%
Pritchard Street CSO
Overflow on sewer network
Company site name
BRISTOL NEWFOUNDLAND ROAD / PRITCHARD STREET
EA ID / permit
WXW00893 · 101092
Outlet location
ST5953773366 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome via SWS 0 0.0 no change 100%
Silver Street Combined Sewer
Overflow on sewer network
Company site name
BRISTOL SILVER ST/BROADMEAD
EA ID / permit
WXW00995 · 101086
Outlet location
ST5895473267 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome 0 0.0 no change 95%
Maggs Lane 1 CSO
Overflow on sewer network
Company site name
BRISTOL FOUNDRY LANE OPEN SPACE
EA ID / permit
WXW00670 · 101238
Outlet location
ST6233174958 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Coombe Brook via SWS 0 0.0 no change 96%
Parson Street CSO
Overflow on sewer network
Company site name
BRISTOL PARSON STREET / NOVERS HILL
EA ID / permit
WXW00845 · 101823
Outlet location
ST5834070333 (OS grid reference) · View on Apple Maps
WFD catchment
The Malago - source to conf R Avon (Brist New Cut) (GB109053021970)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The Malago via SWS 0 0.0 no change 100%
Vale Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL VALE LANE
EA ID / permit
WXW01173 · 101826
Outlet location
ST5803969822 (OS grid reference) · View on Apple Maps
WFD catchment
The Malago - source to conf R Avon (Brist New Cut) (GB109053021970)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The Malago 0 0.0 no change 100%
201 Gloucester Road CSO
Overflow on sewer network
Company site name
BRISTOL GLOUCESTER ROAD O/S NO 199
EA ID / permit
WXW00017 · 013054
Outlet location
ST5612074459 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
River Avon via SWS 0 0.0 no change 100%
High Street/St Marks CSO
Overflow on sewer network
Company site name
BRISTOL HIGH STREET / ST MARKS ROAD
EA ID / permit
WXW00534 · 103310
Outlet location
ST6042774443 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome 0 0.0 no change 100%
29 Lyppiatt Road CSO
Overflow on sewer network
Company site name
BRISTOL LYPPIATT ROAD O/S NO 29
EA ID / permit
WXW00023 · 102879
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
River Avon (E) via SWS 0 0.0 no change 95%
Magdelene Place CSO
Overflow on sewer network
Company site name
BRISTOL SUSSEX PLACE R/O NO 48
EA ID / permit
WXW00669 · 101880
Outlet location
ST6000974495 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Groundwater via Infilt System 0 0.0 no change 100%
147 Wellington Hill West NO2 CSO
Overflow on sewer network
Company site name
BRISTOL WELLINGTON HILL WEST NO 147 (NO 1)
EA ID / permit
WXW00007 · 100463
Outlet location
ST5815577315 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib of River Trym via SWS 0 0.0 no change 100%
147 Wellington Hill West NO2 CSO
Overflow on sewer network
Company site name
BRISTOL WELLINGTON HILL WEST NO 147 (NO 2)
EA ID / permit
WXW00008 · 100465
Outlet location
ST5815577315 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib of River Trym via SWS 0 0.0 no change 90%
Clare Street Combined Sewer
Overflow on sewer network
Company site name
BRISTOL CLARE STREET
EA ID / permit
WXW00294 · 101081
Outlet location
ST5856872056 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Avon via SWS 0 0.0 no change 98%
Nelson Street (2) CSO
Overflow on sewer network
Company site name
BRISTOL BROADMEAD / SILVER STREET
EA ID / permit
WXW00780 · 101085
Outlet location
ST5895273261 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Frome 0 0.0 no change 100%
Maggs Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL MAGGS LANE OPEN SPACE
EA ID / permit
WXW00671 · 101237
Outlet location
ST6233074958 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Coombe Brook via SWS 0 0.0 no change 96%
Hanham High Street CSO
Overflow on sewer network
Company site name
BRISTOL HANHAM HIGH STREET
EA ID / permit
WXW00499 · 101758
Outlet location
ST6289672188 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
River Avon (via SWS) 0 0.0 no change 100%
Nunney Castle CSO
Overflow on sewer network
Company site name
NUNNEY MARKET PLACE SOUTH END
EA ID / permit
WXW00815 · 102501
Outlet location
ST7366845705 (OS grid reference) · View on Apple Maps
WFD catchment
Nunney Bk - source to conf Mells R (GB109053022000)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · No longer operational as an overflow - permit revoked or to be revoked
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Nunney Brook(S) – – 100%
Dallas Road Combined Sewer Overflow
Overflow on sewer network
Company site name
CHIPPENHAM DALLAS ROAD
EA ID / permit
WXW00360 · 100821
Outlet location
ST9168773636 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Hardenhuish Brook 0 0.0 no change 100%
Churchill Gdns SSO
Overflow on sewer network
Company site name
SALISBURY CHURCHILL GARDENS NEAR COLLEGE
EA ID / permit
WXW00293 · 043198
Outlet location
SU1486029420 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (Middle) (GB108043015841)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Avon 0 0.0 no change 100%

Sewage treatment works

Storm tanks and inlet overflows at each Wessex Water sewage works. The figures are 2025 spills.

← All water companies · Contains Environment Agency data licensed under the Open Government Licence v3.0. How to read the data.