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
Tone Green Pumping Station
Storm discharge at pumping station
Company site name
BRADFORD ON TONE TONE GREEN
EA ID / permit
WXW01144 · 103189
Outlet location
ST1719023006 (OS grid reference) · View on Apple Maps
WFD catchment
Tone - Wellington to Taunton (GB108052015481)
2024 spills / hours
17 / 162
Long-term average
11.5 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 196 hours spilling →
River Tone 12 196 down 29% 97%
Leigh on Mendip WwTW
Storm tank at sewage works
Sewage works
Leigh On Mendip
Company site name
LEIGH ON MENDIP STORM TANK
EA ID / permit
WXW00627 · 010053
Outlet location
ST6992047250 (OS grid reference) · View on Apple Maps
WFD catchment
Mells source to conf with Somerset Frome (GB109053022020)
2024 spills / hours
35 / 340
Long-term average
26.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 195 hours spilling →
Leigh Stream 16 195 down 54% 100%
Bull Inn CSO
Overflow on sewer network
Company site name
STURMINSTER NEWTON BULL INN
EA ID / permit
WXW00211 · 400807
Outlet location
ST7853013574 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Middle u/s Pimperne Brook) (GB108043016051)
2024 spills / hours
34 / 297
Long-term average
22.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 195 hours spilling →
River Stour 19 195 down 44% 100%
Midland Road Pumping Station
Storm discharge at pumping station
Company site name
BATH MIDLAND ROAD TWERTON
EA ID / permit
WXW00721 · 102287
Outlet location
ST7390065092 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
47 / 445
Long-term average
12.7 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 194 hours spilling →
River Avon 23 194 down 51% 100%
Knole Pumping Station
Storm discharge at pumping station
Company site name
LONG SUTTON KNOLE
EA ID / permit
WXW00605 · 103179
Outlet location
ST4846725072 (OS grid reference) · View on Apple Maps
WFD catchment
King's Moor Main Drain (Yeo (Somset) (GB108052015660)
2024 spills / hours
29 / 342
Long-term average
22.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 194 hours spilling →
Trib. of Kings Moor Main Drain 14 194 down 52% 100%
Filton Avenue CSO
Overflow on sewer network
Company site name
BRISTOL FILTON AVENUE OUTSIDE NO 230
EA ID / permit
WXW00426 · 101730
Outlet location
ST6043976775 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
111 / 352
Long-term average
99.6 spills a year (monitored since 2021)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 194 hours spilling →
Horfield Brook via SWS 80 194 down 28% 100%
Manhole 11, & Porchestal SPS
Storm discharge at pumping station
Company site name
GLASTONBURY PORCHESTALL
EA ID / permit
WXW00678 · 071825
Outlet location
ST4912038850 (OS grid reference) · View on Apple Maps
WFD catchment
Brue - Clyce Hole to conf North Drain (GB108052021190)
2024 spills / hours
57 / 445
Long-term average
36.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 193 hours spilling →
River Brue Mill Stream (S) 25 193 down 56% 97%
Corfe Castle STW
Storm tank at sewage works
Sewage works
Corfe Castle
Company site name
CORFE CASTLE WYTCH FARM ROAD STORM TANK
EA ID / permit
WXW00324 · 041324
Outlet location
SY9609683153 (OS grid reference) · View on Apple Maps
WFD catchment
Corfe River (GB108044010020)
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
54 / 531
Long-term average
31.0 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 193 hours spilling →
Corfe River (S) 27 193 down 50% 100%
Hack Mill Combined Sewer Overflow
Overflow on sewer network
Company site name
WOTTON-UNDER-EDGE HACK MILL
EA ID / permit
WXW00491 · 102083
Outlet location
ST7589692821 (OS grid reference) · View on Apple Maps
WFD catchment
Ozleworth Bk - source to conf Little Avon R (GB109054026610)
2024 spills / hours
82 / 435
Long-term average
70.5 spills a year (monitored since 2020)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 193 hours spilling →
Dyers Brook 57 193 down 30% 100%
Compton Bassett WwTW
Storm tank at sewage works
Sewage works
Compton Bassett
Company site name
COMPTON BASSETT STORM TANK
EA ID / permit
WXW00317 · 102943
Outlet location
SU0166070330 (OS grid reference) · View on Apple Maps
WFD catchment
Marden - source to conf Cowage Bk (GB109053022050)
2024 spills / hours
34 / 530
Long-term average
25.0 spills a year (monitored since 2024)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 192 hours spilling →
Rivers Brook(S) 16 192 down 53% 100%
Gaston Road CSO
Overflow on sewer network
Company site name
CHIPPENHAM GASTONS ROAD
EA ID / permit
WXW00458 · 102550
Outlet location
ST9137373707 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
76 / 487
Long-term average
64.5 spills a year (monitored since 2020)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 191 hours spilling →
Hardenhuish Brook 46 191 down 39% 100%
Great Wishford WRC
Storm tank at sewage works (with treatment)
Sewage works
Great Wishford
Company site name
WISHFORD WILTON ROAD STORM TANK
EA ID / permit
WXW00481 · 041799
Outlet location
SU0886833771 (OS grid reference) · View on Apple Maps
WFD catchment
Wylye (Lower) (GB108043022510)
Treatment
Nature Based Solutions trial
2024 spills / hours
109 / 2,578
Long-term average
47.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 190 hours spilling →
River Wylye 10 190 down 91% 100%
Evercreech Water Recycling Centre
Storm tank at sewage works
Sewage works
Evercreech
Company site name
EVERCREECH STORM TANK
EA ID / permit
WXW00411 · 102152
Outlet location
ST6456037540 (OS grid reference) · View on Apple Maps
WFD catchment
Alham (GB108052021160)
2024 spills / hours
36 / 339
Long-term average
27.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 189 hours spilling →
River Alham 19 189 down 47% 100%
Lavington (Woodbridge) WwTW
Storm tank at sewage works
Sewage works
Lavington
Company site name
LAVINGTON WOODBRIDGE STORM TANK
EA ID / permit
WXW00621 · 101440
Outlet location
ST9984655078 (OS grid reference) · View on Apple Maps
WFD catchment
Semington Bk - source to conf Worton Str (GB109053022130)
2024 spills / hours
45 / 506
Long-term average
17.0 spills a year (monitored since 2018)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 188 hours spilling →
Semington Brook 15 188 down 67% 100%
Morris Road Pumping Station
Storm discharge at pumping station
Company site name
BOVINGTON MORRIS ROAD
EA ID / permit
WXW00756 · 401421
Outlet location
SY8406988509 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) d/s Louds Mill Dorchester (GB108044009692)
2024 spills / hours
42 / 263
Long-term average
32.0 spills a year (monitored since 2021)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 187 hours spilling →
Tributary of the River Frome 36 187 down 14% 100%
Buckingham Road Pumping Station
Storm discharge at pumping station
Company site name
GILLINGHAM BUCKINGHAM ROAD
EA ID / permit
WXW00207 · 042428
Outlet location
ST8081026380 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Headwaters) (GB108043022490)
2024 spills / hours
60 / 369
Long-term average
28.1 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 184 hours spilling →
River Stour 32 184 down 47% 100%
Semington Brook Pumping Station
Storm discharge at pumping station
Company site name
SEMINGTON SEMINGTON BROOK
EA ID / permit
WXW00970 · 102810
Outlet location
ST8988060810 (OS grid reference) · View on Apple Maps
WFD catchment
Semington Bk-Milebourne Str to conf R Avon (Brist) (GB109053022200)
2024 spills / hours
35 / 506
Long-term average
20.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 184 hours spilling →
Semington Brook (S) 13 184 down 63% 100%
Yeovil Without STW
Inlet overflow at sewage works
Sewage works
Yeovil Without
Company site name
YEOVIL WITHOUT OFF STONE LANE INLET
EA ID / permit
WXW01294 · 071670
Outlet location
ST5607018720 (OS grid reference) · View on Apple Maps
WFD catchment
Bearley Brook (GB108052015610)
2024 spills / hours
68 / 301
Long-term average
62.7 spills a year (monitored since 2023)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 180 hours spilling →
Tributary of the Bearley Brook 45 180 down 34% 100%
Luckington Water Recycling Centre
Storm tank at sewage works
Sewage works
Luckington
Company site name
LUCKINGTON STORM TANK
EA ID / permit
WXW00659 · 010156
Outlet location
ST8380183912 (OS grid reference) · View on Apple Maps
WFD catchment
Luckington Bk (GB109053027665)
2024 spills / hours
45 / 666
Long-term average
26.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 178 hours spilling →
Luckington Brook 13 178 down 71% 92%
Sutton Montis - Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Sutton Montis
EA ID / permit
WXW01351 · Unpermitted
Outlet location
ST6183223896 (OS grid reference) · View on Apple Maps
WFD catchment
Hornsey Brook (GB108052015640)
2024 spills / hours
– / –
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 178 hours spilling →
Hornsey Brook 27 178 100%
Henlade Pumping Station
Storm discharge at pumping station
Company site name
HENLADE
EA ID / permit
WXW00523 · NPSWQD001440
Outlet location
ST2660723569 (OS grid reference) · View on Apple Maps
WFD catchment
Broughton Brook (South and West Somerset) (GB108052015420)
2024 spills / hours
34 / 418
Long-term average
20.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 177 hours spilling →
Tributary of Black Brook 14 177 down 59% 100%
Charlton Horethorne WwTW
Storm tank at sewage works
Sewage works
Charlton Horethorne
Company site name
CHARLTON HORETHORNE MOUNT LANE STORM TANK
EA ID / permit
WXW00252 · 072373
Outlet location
ST6692322583 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
25 / 267
Long-term average
22.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 176 hours spilling →
Bromers Brook 21 176 down 16% 100%
Priory Storm Tanks
Overflow on sewer network
Company site name
TAUNTON PRIORY STORM TANKS CSO
EA ID / permit
WXW00891 · 102258
Outlet location
ST2360025410 (OS grid reference) · View on Apple Maps
WFD catchment
Tone Ds Taunton (GB108052015482)
2024 spills / hours
38 / 379
Long-term average
26.8 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 175 hours spilling →
River Tone(S) 19 175 down 50% 100%
Henstridge Pumping Station
Storm discharge at pumping station
Company site name
HENSTRIDGE MARSH LANE (HENSTRIDGE NO 2)
EA ID / permit
WXW00527 · 050882
Outlet location
ST7325020140 (OS grid reference) · View on Apple Maps
WFD catchment
Henstridge Stream (GB108043015822)
2024 spills / hours
42 / 339
Long-term average
27.8 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 175 hours spilling →
Tributary of River Cale 21 175 down 50% 100%
Chilcompton WwTW
Storm tank at sewage works
Sewage works
Chilcompton
Company site name
CHILCOMPTON STORM TANK
EA ID / permit
WXW00271 · 102218
Outlet location
ST6512752900 (OS grid reference) · View on Apple Maps
WFD catchment
Somer (GB109053022251)
2024 spills / hours
46 / 408
Long-term average
18.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 174 hours spilling →
Somer Stream(S) 24 174 down 48% 100%
Coulston Pumping Station
Storm discharge at pumping station
Company site name
COULSTON
EA ID / permit
WXW00331 · 103785
Outlet location
ST9504054440 (OS grid reference) · View on Apple Maps
WFD catchment
Bulkington Drove w/c source to conf Semington Bk (GB109053022140)
2024 spills / hours
57 / 756
Long-term average
34.3 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 173 hours spilling →
A Trib of the Semington Brook 18 173 down 68% 100%
Station Road Sewage Pumping Station
Storm discharge at pumping station
Company site name
MINETY STATION ROAD
EA ID / permit
WXW01061 · CSSA.2213
Outlet location
SU0324090560 (OS grid reference) · View on Apple Maps
WFD catchment
Derry Brook (GB106039023620)
2024 spills / hours
45 / 339
Long-term average
45.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 171 hours spilling →
Unnamed Trib of Derry Brook 22 171 down 51% 100%
Northload Bridge Pumping Station
Storm discharge at pumping station
Company site name
GLASTONBURY NORTH LOAD BRIDGE
EA ID / permit
WXW00811 · 102496
Outlet location
ST4936339519 (OS grid reference) · View on Apple Maps
WFD catchment
Brue - Clyce Hole to conf North Drain (GB108052021190)
2024 spills / hours
36 / 382
Long-term average
14.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 171 hours spilling →
Glastonbury Mill Stream 16 171 down 56% 100%
The Green Pumping Station
Storm discharge at pumping station
Company site name
BROUGHTON GIFFORD THE GREEN
EA ID / permit
WXW01121 · 100634
Outlet location
ST8770162982 (OS grid reference) · View on Apple Maps
WFD catchment
Chalfield Brook - source to conf Avon (GB109053021890)
2024 spills / hours
31 / 335
Long-term average
23.3 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 170 hours spilling →
Trib of Chalfield Brook 14 170 down 55% 100%
Ellesmere Road CSO
Overflow on sewer network
Company site name
BRISTOL ELLESMERE ROAD R/O 15 AND 16
EA ID / permit
WXW00405 · 103766
Outlet location
ST6158669928 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
60 / 381
Long-term average
52.7 spills a year (monitored since 2023)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement ongoing
Volume & pollution
Estimate from 170 hours spilling →
Trib of the Brislington Brook 40 170 down 33% 100%
Merriott Wastewater Treatment Works
Inlet overflow at sewage works
Sewage works
Merriott
Company site name
MERRIOTT B3165 INLET
EA ID / permit
WXW00715 · 102289
Outlet location
ST4523012810 (OS grid reference) · View on Apple Maps
WFD catchment
Merriot Stream (GB108052015290)
2024 spills / hours
57 / 255
Long-term average
49.7 spills a year (monitored since 2020)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 168 hours spilling →
Trib of Goulds Brook 42 168 down 26% 100%
Broad Quay CSO
Overflow on sewer network
Company site name
BATH BROAD QUAY / WESTGATE STREET JUNCTION
EA ID / permit
WXW00190 · 102783
Outlet location
ST7504364354 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
55 / 498
Long-term average
34.3 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 167 hours spilling →
River Avon 27 167 down 51% 100%
Bishops Lydeard WwTW
Storm tank at sewage works
Sewage works
Bishops Lydeard
Company site name
BISHOPS LYDEARD STORM TANK
EA ID / permit
WXW00137 · 102049
Outlet location
ST1834028800 (OS grid reference) · View on Apple Maps
WFD catchment
Back Stream (GB108052021390)
2024 spills / hours
17 / 170
Long-term average
16.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 167 hours spilling →
Back Stream 13 167 down 24% 100%
London Road West CSO
Overflow on sewer network
Company site name
BATH BATHEASTON BY-PASS
EA ID / permit
WXW00636 · 100680
Outlet location
ST7667066483 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
116 / 1,374
Long-term average
73.7 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 167 hours spilling →
River Avon via SWS 27 167 down 77% 100%
Lower Somerton PS
Storm discharge at pumping station
Company site name
LOWER SOMERTON
EA ID / permit
WXW00655 · 102063
Outlet location
ST4975128348 ST4974928346 (OS grid reference) · View on Apple Maps
WFD catchment
Cary - source to conf with KSD (GB108052015140)
2024 spills / hours
33 / 278
Long-term average
21.5 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 166 hours spilling →
Millstream 15 166 down 55% 100%
Wimborne Water Recycling Centre
Storm tank at sewage works
Sewage works
Wimborne
Company site name
WIMBORNE BROOK ROAD STORM TANK
EA ID / permit
WXW01264 · 400972
Outlet location
SZ0240899108 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
2024 spills / hours
72 / 1,093
Long-term average
56.3 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
UWWTR improvement ongoing
Volume & pollution
Estimate from 165 hours spilling →
River Stour 22 165 down 69% 100%
Mill Lane Pumping Station
Storm discharge at pumping station
Company site name
BOX MILL LANE
EA ID / permit
WXW00735 · 011833
Outlet location
ST8246568899 (OS grid reference) · View on Apple Maps
WFD catchment
By Bk - conf Doncombe Bk to conf R Avon (Brist) (GB109053027380)
2024 spills / hours
59 / 335
Long-term average
48.0 spills a year (monitored since 2022)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 165 hours spilling →
By Brook 40 165 down 32% 100%
Ladydown Mill Combined Sewer of
Overflow on sewer network
Company site name
TROWBRIDGE CANAL ROAD
EA ID / permit
WXW00607 · 102027
Outlet location
ST8533859047 (OS grid reference) · View on Apple Maps
WFD catchment
Biss (Bitham Bk to Bristol Avon) (GB109053021791)
2024 spills / hours
41 / 296
Long-term average
30.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 165 hours spilling →
River Biss via SWS 21 165 down 49% 100%
South Wraxall STW
Storm tank at sewage works
Sewage works
South Wraxall
Company site name
SOUTH WRAXALL HOME FARM LOWER WRAXALL STORM TANK
EA ID / permit
WXW01017 · 102755
Outlet location
ST8362063965 (OS grid reference) · View on Apple Maps
WFD catchment
Chalfield Brook - source to conf Avon (GB109053021890)
2024 spills / hours
44 / 492
Long-term average
27.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 165 hours spilling →
Chalfield Brook(S) 12 165 down 73% 100%
Witham Friary Pumping Station
Storm discharge at pumping station
Company site name
WITHAM FRIARY
EA ID / permit
WXW01272 · 102695
Outlet location
ST7463141192 (OS grid reference) · View on Apple Maps
WFD catchment
Frome - source to conf Maiden Bradley Bk (GB109053022080)
2024 spills / hours
37 / 342
Long-term average
20.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 163 hours spilling →
River Frome 17 163 down 54% 100%
Lytchett Minster STW
Storm tank at sewage works
Sewage works
Lytchett Minster
Company site name
LYTCHETT MINSTER LYTCHETT BAY STORM TANK
EA ID / permit
WXW00668 · 401242
Outlet location
SY9685092300 (OS grid reference) · View on Apple Maps
WFD catchment
POOLE HARBOUR (GB520804415800)
Bathing water
Poole Harbour Rockley Sands
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
28 / 305
Long-term average
15.0 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 163 hours spilling →
Lytchett Bay(E) 13 163 down 54% 100%
Coleford Wastewater Treatment Works
Inlet overflow at sewage works
Sewage works
Coleford
Company site name
COLEFORD INLET
EA ID / permit
WXW00307 · 010265
Outlet location
ST6917148925 (OS grid reference) · View on Apple Maps
WFD catchment
Mells source to conf with Somerset Frome (GB109053022020)
2024 spills / hours
59 / 242
Long-term average
39.1 spills a year (monitored since 2018)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 162 hours spilling →
Mells River 42 162 down 29% 100%
Sherborne WwTW
Inlet overflow at sewage works
Sewage works
Sherborne
Company site name
SHERBORNE WEST MILL LANE INLET
EA ID / permit
WXW00984 · 070099
Outlet location
ST6316315378 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
44 / 301
Long-term average
30.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 162 hours spilling →
River Yeo 30 162 down 32% 96%
Stoke Road Pumping Station
Storm discharge at pumping station
Company site name
NORTH CURRY STOKE ROAD
EA ID / permit
WXW01071 · 103190
Outlet location
ST3260325606 (OS grid reference) · View on Apple Maps
WFD catchment
West Sedgemoor Main Drain (GB108052015450)
2024 spills / hours
62 / 890
Long-term average
43.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 161 hours spilling →
Trib of Sedgemoor Old Rhyne 22 161 down 65% 100%
Motcombe Attenuation Tank
Storm discharge at pumping station
Company site name
MOTCOMBE TANK (PUMPED)
EA ID / permit
WXW00759 · 042071
Outlet location
ST8492025530 (OS grid reference) · View on Apple Maps
WFD catchment
Lodden (GB108043022440)
2024 spills / hours
32 / 293
Long-term average
23.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 161 hours spilling →
Tributary of River Lodden (S) 19 161 down 41% 100%
Evercreech Water Recycling Centre
Inlet overflow at sewage works
Sewage works
Evercreech
Company site name
EVERCREECH INLET
EA ID / permit
WXW00410 · 102152
Outlet location
ST6456037540 (OS grid reference) · View on Apple Maps
WFD catchment
Alham (GB108052021160)
2024 spills / hours
60 / 228
Long-term average
48.0 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 161 hours spilling →
River Alham 48 161 down 20% 100%
Purn Pumping Station(Weston-S-Mare)
Storm discharge at pumping station
Company site name
BLEADON PURN
EA ID / permit
WXW00900 · 101663
Outlet location
ST3372056950 (OS grid reference) · View on Apple Maps
WFD catchment
Axe - Cocklake to Brean Cross Sluice (GB109052021570)
2024 spills / hours
69 / 1,293
Long-term average
34.7 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 161 hours spilling →
New Rhyne(S) 13 161 down 81% 100%
West Bexington Pumping Station
Storm discharge at pumping station
Company site name
WEST BEXINGTON
EA ID / permit
WXW01218 · 041125
Outlet location
SY5295086620 (OS grid reference) · View on Apple Maps
WFD catchment
Lyme Bay East (GB620806560000)
2024 spills / hours
64 / 526
Long-term average
78.8 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 160 hours spilling →
Chesil Beach 26 160 down 59% 96%
Sunny Acres Foot Bridge CSO
Overflow on sewer network
Company site name
WINTERBOURNE WATLEYS END IN FIELD OFF FACTORY ROAD
EA ID / permit
WXW01087 · 103072
Outlet location
ST6604981072 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - conf Laddon Bk to conf Folly Bk (GB109053027820)
2024 spills / hours
116 / 1,347
Long-term average
87.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 159 hours spilling →
River Frome 14 159 down 88% 100%
Baltonsborough(Main)Pumping Station
Storm discharge at pumping station
Company site name
BALTONSBOROUGH MAIN 1
EA ID / permit
WXW00102 · 103055
Outlet location
ST5433034790 (OS grid reference) · View on Apple Maps
WFD catchment
Brue - Tootle Bridge to Clyse Hole (GB108052021182)
2024 spills / hours
24 / 124
Long-term average
33.0 spills a year (monitored since 2021)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 156 hours spilling →
The Mill Stream(S) 33 156 up 38% 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.