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
Bath - Kelston View O/S 38 - Combined Sewer Overflow
Overflow on sewer network
EA ID / permit
WXW01313 · Unpermitted
Outlet location
ST7292264762 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
– / –
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 2.1 hours spilling →
River Avon 17 2.1 96%
Walcot Street Combined Sewer of
Overflow on sewer network
Company site name
BATH WALCOT SYPHON AT HEAD
EA ID / permit
WXW01182 · 103042
Outlet location
ST7514365181 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
16 / 64
Long-term average
7.0 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 2.0 hours spilling →
The River Avon 7 2.0 down 56% 95%
24 to 39 Hazel Grove
Overflow on sewer network
Company site name
BATH HAZEL GROVE R/O NO 24 TO 39
EA ID / permit
WXW00021 · 102603
Outlet location
ST7390765092 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
17 / 4.5
Long-term average
16.8 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 2.0 hours spilling →
River Avon via SWS 11 2.0 down 35% 100%
Fox Hill Woodlands Cottage CSO
Overflow on sewer network
Company site name
BATH FOX HILL O/S WOODLANDS COTTAGE
EA ID / permit
WXW00444 · 010936
Outlet location
ST7538464296 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
42 / 27
Long-term average
40.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 2.0 hours spilling →
River Avon via SWS 6 2.0 down 86% 100%
Hillsmoor Water Recycling Centre
Inlet overflow at sewage works
Sewage works
Hillsmoor
Company site name
WIVELISCOMBE HILLSMOOR INLET
EA ID / permit
WXW00541 · NPSWQD000307
Outlet location
ST0857727376 (OS grid reference) · View on Apple Maps
WFD catchment
Hillfarrance Bk (GB108052015510)
2024 spills / hours
8 / 3.8
Long-term average
8.8 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 2.0 hours spilling →
Trib of Hillfarrance Brook 9 2.0 up 13% 100%
Hindon Pumping Station
Storm discharge at pumping station
Company site name
HINDON THE DENE
EA ID / permit
WXW00544 · 042095
Outlet location
ST9172432927 (OS grid reference) · View on Apple Maps
WFD catchment
Fonthill Stream (GB108043022500)
2024 spills / hours
41 / 441
Long-term average
26.5 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 2.0 hours spilling →
Tributary of the River Nadder 4 2.0 down 90% 100%
Outside 63 Moorlands Road
Overflow on sewer network
Company site name
BRISTOL MOORLANDS ROAD O/S NO 63
EA ID / permit
WXW00832 · 101236
Outlet location
ST6233074960 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
17 / 5.0
Long-term average
13.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.9 hours spilling →
Coombe Brook(S) 10 1.9 down 41% 97%
Swan Pumping Station
Storm discharge at pumping station
Company site name
PEWSEY SWAN
EA ID / permit
WXW01094 · 401642
Outlet location
SU1645059730 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (East) and Woodborough Stream (GB108043022410)
2024 spills / hours
15 / 13
Long-term average
5.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.9 hours spilling →
River Avon (S) 6 1.9 down 60% 100%
Lower Conham Vale CSO
Overflow on sewer network
Company site name
BRISTOL CONHAM VALE
EA ID / permit
WXW00650 · 103309
Outlet location
ST6290172188 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
27 / 7.9
Long-term average
15.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.9 hours spilling →
River Avon (via SWS) 8 1.9 down 70% 95%
Stogumber Combined Sewer Overflow
Overflow on sewer network
Company site name
STOGUMBER SO
EA ID / permit
WXW01065 · 102305
Outlet location
ST0983437721 (OS grid reference) · View on Apple Maps
WFD catchment
Doniford Stream (GB108051020250)
2024 spills / hours
8 / 4.7
Long-term average
6.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.9 hours spilling →
Trib of Doniford Stream 5 1.9 down 38% 96%
Ashley Down Road Allotments CSO
Overflow on sewer network
Company site name
BRISTOL ASHLEY DOWN ROAD ALLOTMENTS
EA ID / permit
WXW00086 · EPRAP3921GT
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
9 / 3.3
Long-term average
6.8 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.9 hours spilling →
The River Avon (E) via SWS 4 1.9 down 56% 100%
1A Shutewater Close Pumping Station
Storm discharge at pumping station
Company site name
BISHOPS HULL SHUTEMEAD
EA ID / permit
WXW00014 · EPRJB3795EQ
Outlet location
ST2018424765 (OS grid reference) · View on Apple Maps
WFD catchment
Tone - Wellington to Taunton (GB108052015481)
Bathing water
River Tone at French Weir Park
2024 spills / hours
2 / 2.0
Long-term average
5.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.9 hours spilling →
Trib of River Tone via SWS 1 1.9 down 50% 100%
Bishops Road CSO
Overflow on sewer network
Company site name
BRISTOL BISHOP ROAD / 214 GLOUCESTER ROAD
EA ID / permit
WXW00138 · 013056
Outlet location
ST5612074460 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
6 / 1.5
Long-term average
7.0 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.8 hours spilling →
River Avon via SWS (Estuarine) 10 1.8 up 67% 100%
Church Road Pumping Station
Storm discharge at pumping station
Company site name
NORTH NEWTON CHURCH ROAD
EA ID / permit
WXW00286 · 101802
Outlet location
ST3022031100 (OS grid reference) · View on Apple Maps
WFD catchment
Petherton Stream (GB108052021360)
2024 spills / hours
4 / 21
Long-term average
1.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.8 hours spilling →
Trib of River Tone (S) 1 1.8 down 75% 100%
Cheap Street North CSO
Overflow on sewer network
Company site name
SHERBORNE CHEAP STREET
EA ID / permit
WXW00260 · EPRJB3795WW
Outlet location
ST6352816864 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
13 / 2.0
Long-term average
11.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.7 hours spilling →
Trib of the River Yeo via SWS 12 1.7 down 8% 99%
Dorset Close CSO
Overflow on sewer network
Company site name
BATH DORSET CLOSE O/S SCHOOL
EA ID / permit
WXW00376 · 102776
Outlet location
ST7390865093 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
12 / 3.8
Long-term average
9.5 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.7 hours spilling →
River Avon via SWS 9 1.7 down 25% 97%
Champion Court CSO
Overflow on sewer network
Company site name
BRISTOL WELLINGTON ROAD PLAYGROUND
EA ID / permit
WXW00245 · 101094
Outlet location
ST5957673396 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
8 / 3.3
Long-term average
4.2 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.7 hours spilling →
River Frome 2 1.7 down 75% 100%
Bristol Hollyguest Road R/O 21
Overflow on sewer network
EA ID / permit
WXW01306 · Permit applied for
Outlet location
ST6289572185 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
4 / 0.9
Long-term average
6.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.7 hours spilling →
River Avon 8 1.7 up 100% 92%
Wood Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
CHIPPENHAM WOOD LANE
EA ID / permit
WXW01275 · 102554
Outlet location
ST9219672647 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
10 / 3.3
Long-term average
8.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.7 hours spilling →
Tributary of River Avon 7 1.7 down 30% 100%
Cleeve Road
Overflow on sewer network
Company site name
FILTON CLEEVE RD MORTUARY
EA ID / permit
WXW00295 · 101683
Outlet location
ST6074079980 (OS grid reference) · View on Apple Maps
WFD catchment
Stoke Bk - source to conf Bradley Bk (GB109053027540)
2024 spills / hours
12 / 11
Long-term average
9.0 spills a year (monitored since 2024)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.6 hours spilling →
Stoke Brook (S) 6 1.6 down 50% 100%
Waterside Combined Sewer Overflow
Overflow on sewer network
Company site name
RADSTOCK WATERSIDE SO
EA ID / permit
WXW01197 · 021353
Outlet location
ST6800853727 (OS grid reference) · View on Apple Maps
WFD catchment
Snails Bk - source to conf Kilmersdon Str (GB109053022240)
2024 spills / hours
20 / 13
Long-term average
29.6 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.6 hours spilling →
Trib of Waterside 9 1.6 down 55% 100%
Newland Combined Sewer Overflow
Overflow on sewer network
Company site name
SHERBORNE NEWLANDS/THE AVENUE
EA ID / permit
WXW00796 · 070887
Outlet location
ST6419016335 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
9 / 2.4
Long-term average
9.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.6 hours spilling →
River Yeo via SWS 9 1.6 no change 95%
Poole Harkwood Drive 1
Overflow on sewer network
EA ID / permit
WXW00506 · Unpermitted
Outlet location
SY9984091570 (OS grid reference) · View on Apple Maps
WFD catchment
Poole Harbour (GB520804415800)
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
1 / 2.8
Long-term average
1.5 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.6 hours spilling →
Holes Bay Estuarine 2 1.6 up 100% 100%
Bournemouth Charminster Road Near 286-290
Overflow on sewer network
EA ID / permit
WXW00769 · Permit applied for
Outlet location
SZ1333593666 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
Bathing water
Christchurch Avon Beach; Christchurch Friar`s Cliff
2024 spills / hours
2 / 0.5
Long-term average
3.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.6 hours spilling →
River Stour 4 1.6 up 100% 100%
Churchill Arms Combined Sewer of
Overflow on sewer network
Company site name
WEST LAVINGTON CHURCHILL ARMS NEW
EA ID / permit
WXW00291 · 101815
Outlet location
SU0071353439 (OS grid reference) · View on Apple Maps
WFD catchment
Semington Bk - source to conf Worton Str (GB109053022130)
2024 spills / hours
11 / 2.5
Long-term average
9.8 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.5 hours spilling →
Semington Brook via SWS 8 1.5 down 27% 100%
Ullswater Crescent CSO
Overflow on sewer network
Company site name
WEYMOUTH ULLSWATER CRESCENT
EA ID / permit
WXW01165 · 401286
Outlet location
SY6721080970 (OS grid reference) · View on Apple Maps
WFD catchment
Wey (GB108044010210)
2024 spills / hours
5 / 0.8
Long-term average
4.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.5 hours spilling →
Radipole Lake via SWS 8 1.5 up 60% 100%
North End Pumping Station
Storm discharge at pumping station
Company site name
CREECH ST MICHAEL NORTH END
EA ID / permit
WXW00802 · 102019
Outlet location
ST2729426222 (OS grid reference) · View on Apple Maps
WFD catchment
Tone Ds Taunton (GB108052015482)
2024 spills / hours
3 / 18
Long-term average
2.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.5 hours spilling →
Trib of River Tone 1 1.5 down 67% 100%
Watling Way Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL WATLING WAY IN GARDEN NO 27
EA ID / permit
WXW01199 · 102071
Outlet location
ST5202277004 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
7 / 1.0
Long-term average
5.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.5 hours spilling →
River Avon (Estuarine) via SWS 5 1.5 down 29% 100%
Houndsmoor Lane CSO
Overflow on sewer network
Company site name
MILVERTON HOUNDSMOOR LANE
EA ID / permit
WXW00564 · 102263
Outlet location
ST1267125872 (OS grid reference) · View on Apple Maps
WFD catchment
Hillfarrance Bk (GB108052015510)
2024 spills / hours
10 / 2.7
Long-term average
12.0 spills a year (monitored since 2023)
Investigation
Operational investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.4 hours spilling →
Trib of Hillfarrance Brook 6 1.4 down 40% 100%
Bedminster Road CSO
Overflow on sewer network
Company site name
BRISTOL BEDMINSTER ROAD SIDE OF 191
EA ID / permit
WXW00121 · 103305
Outlet location
ST5806872114 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
16 / 2.6
Long-term average
10.8 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.4 hours spilling →
River Avon via SWS 8 1.4 down 50% 100%
Lulworth Beach Pumping Station
Storm discharge at pumping station
Company site name
WEST LULWORTH OUTFALL PS
EA ID / permit
WXW00662 · 401864
Outlet location
SY8242079730 (OS grid reference) · View on Apple Maps
WFD catchment
Dorset / Hampshire (GB620705550000)
Bathing water
Lulworth Cove
2024 spills / hours
17 / 76
Long-term average
19.7 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 1.4 hours spilling →
English Channel(C) 7 1.4 down 59% 100%
Central Trading Estate PS
Storm discharge at pumping station
Company site name
BRISTOL CENTRAL TRADING ESTATE BATH ROAD
EA ID / permit
WXW00242 · 021635
Outlet location
ST6075371860 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
12 / 9.8
Long-term average
6.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.4 hours spilling →
River Avon (Estuarine) 2 1.4 down 83% 100%
Wyndham Hill CSO
Overflow on sewer network
Company site name
YEOVIL WYNDHAM HILL
EA ID / permit
WXW01292 · 071731
Outlet location
ST5639515975 (OS grid reference) · View on Apple Maps
WFD catchment
Dodham Brook (Yeo (Somset)) (GB108052015600)
2024 spills / hours
4 / 1.1
Long-term average
3.3 spills a year (monitored since 2023)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.4 hours spilling →
Dodham Brook 2 1.4 down 50% 100%
Poole Bridge Pumping Station
Storm discharge at pumping station
Company site name
POOLE BRIDGE POOLE QUAY
EA ID / permit
WXW00866 · 400719
Outlet location
SZ0063090370 (OS grid reference) · View on Apple Maps
WFD catchment
POOLE HARBOUR (GB520804415800)
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
0 / 0.0
Long-term average
1.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Backwater Channel,Poole Harb. 1 1.3 up from 0 100%
Stallard Street CSO
Overflow on sewer network
Company site name
TROWBRIDGE STALLARD STREET O/S 58
EA ID / permit
WXW01047 · 101008
Outlet location
ST8473258269 (OS grid reference) · View on Apple Maps
WFD catchment
Biss (Bitham Bk to Bristol Avon) (GB109053021791)
2024 spills / hours
4 / 21
Long-term average
1.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.3 hours spilling →
The River Biss via SWS 2 1.3 down 50% 97%
98 Hotwell Road CSO
Overflow on sewer network
Company site name
BRISTOL HOTWELLS ROAD APPROX NO 100
EA ID / permit
WXW00056 · 102899
Outlet location
ST5757772464 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
6 / 1.6
Long-term average
8.0 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Bristol Frome Floating Harbour 3 1.3 down 50% 100%
Central Trading Estate CSO
Overflow on sewer network
Company site name
BRISTOL CENTRAL INDUSTRIAL ESTATE BATH ROAD
EA ID / permit
WXW00241 · 100590/CS/01
Outlet location
ST6044071704 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
11 / 2.4
Long-term average
6.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
River Avon (Estuarine) 8 1.3 down 27% 100%
South Cadbury Pumping Station
Storm discharge at pumping station
Company site name
SOUTH CADBURY
EA ID / permit
WXW01011 · 102161
Outlet location
ST6339025950 (OS grid reference) · View on Apple Maps
WFD catchment
Cam Tributary (GB108052015670)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Trib of River Cam (S) 1 1.3 up from 0 100%
Dowlish Wake WwTW
Inlet overflow at sewage works
Sewage works
Dowlish Wake
Company site name
DOWLISH WAKE KINGSTON INLET
EA ID / permit
WXW00377 · 072317
Outlet location
ST3724013020 (OS grid reference) · View on Apple Maps
WFD catchment
Dowlish Brook (GB108052015170)
2024 spills / hours
1 / 3.0
Long-term average
8.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Dowlish Brook 1 1.3 no change 100%
New Queen Street Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL NEW QUEEN ST O/S NO 72
EA ID / permit
WXW00789 · 101795
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
11 / 3.0
Long-term average
12.5 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 1.3 hours spilling →
River Avon (E) via SWS 8 1.3 down 27% 100%
Andover Road/Stockwood Cresc CSO
Overflow on sewer network
Company site name
BRISTOL ANDOVER ROAD / STOCKWOOD CRESCENT
EA ID / permit
WXW00083 · 101819
Outlet location
ST5973170538 (OS grid reference) · View on Apple Maps
WFD catchment
The Malago - source to conf R Avon (Brist New Cut) (GB109053021970)
2024 spills / hours
12 / 2.5
Long-term average
9.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Tributary of the Malago 6 1.3 down 50% 100%
Dunkirk Hill Pumping Station
Storm discharge at pumping station
Company site name
DEVIZES DUNKIRK HILL
EA ID / permit
WXW00386 · 101767
Outlet location
ST9920061910 (OS grid reference) · View on Apple Maps
WFD catchment
Summerham Brook (GB109053022220)
2024 spills / hours
18 / 21
Long-term average
8.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
Summerham Brook (S) 7 1.3 down 61% 100%
CSO at Top of South Walks
Overflow on sewer network
Company site name
DORCHESTER SOUTH WALKS / SOUTH STREET
EA ID / permit
WXW00353 · 400688
Outlet location
SY6954890767 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.3 hours spilling →
River Frome via SWS 2 1.3 up from 0 98%
Chickerell Road CSO
Overflow on sewer network
Company site name
WEYMOUTH CHICKERELL ROAD
EA ID / permit
WXW00267 · 400893
Outlet location
SY6758078730 (OS grid reference) · View on Apple Maps
WFD catchment
WEY (GB510804415700)
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
33 / 14
Long-term average
26.3 spills a year (monitored since 2020)
Monitor below 90%
Telemetry or data archiving failure / issue · Scheduled
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 1.2 hours spilling →
Weymouth Harbour 6 1.2 down 82% 34%
Preston Grove CSO
Overflow on sewer network
Company site name
YEOVIL PRESTON GROVE O/S 2
EA ID / permit
WXW00886 · 102260
Outlet location
ST5489815994 (OS grid reference) · View on Apple Maps
WFD catchment
Dodham Brook (Yeo (Somset)) (GB108052015600)
2024 spills / hours
10 / 2.5
Long-term average
13.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.2 hours spilling →
Tributary of the River Yeo 3 1.2 down 70% 100%
Hurdcott PS
Storm discharge at pumping station
Company site name
HURDCOTT
EA ID / permit
WXW00570 · 401575
Outlet location
SU1690033770 (OS grid reference) · View on Apple Maps
WFD catchment
Bourne (Hampshire Avon) (GB108043022390)
2024 spills / hours
26 / 499
Long-term average
13.3 spills a year (monitored since 2018)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.2 hours spilling →
River Bourne(S) 1 1.2 down 96% 100%
Victoria Square Portland
Storm discharge at pumping station
Company site name
PORTLAND VICTORIA SQUARE
EA ID / permit
WXW01178 · 040206
Outlet location
SY6851074510 (OS grid reference) · View on Apple Maps
WFD catchment
Portland Harbour (GB680805270000)
Bathing water
Portland Harbour Castle Cove; Portland Harbour Sandsfoot Castle
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
13 / 2.6
Long-term average
5.8 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.2 hours spilling →
Portland Harbour 5 1.2 down 62% 100%
82 Howard Road CSO
Overflow on sewer network
Company site name
BRISTOL HOWARD RD JNC FALLODON WY/HALSBURY RD
EA ID / permit
WXW00053 · NPSWQD010512
Outlet location
ST5861175071 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
4 / 1.4
Long-term average
4.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.2 hours spilling →
Cranbrook 7 1.2 up 75% 100%
Sandbanks Pavilion Pumping Station
Storm discharge at pumping station
Company site name
POOLE SANDBANKS PAVILION
EA ID / permit
WXW00955 · 051303
Outlet location
SZ0436287753 (OS grid reference) · View on Apple Maps
WFD catchment
POOLE HARBOUR (GB520804415800)
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
5 / 11
Long-term average
3.9 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 1.2 hours spilling →
Poole Harbour 2 1.2 down 60% 100%
Prior Park Road CSO
Overflow on sewer network
Company site name
BATH PRIOR PARK ROAD OPP NO 9
EA ID / permit
WXW00889 · NPSWQD002500
Outlet location
ST7538564298 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
14 / 3.5
Long-term average
7.5 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.1 hours spilling →
River Avon via SWS 9 1.1 down 36% 97%

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.