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
Widcombe Baptist Church CSO
Overflow on sewer network
Company site name
BATH WIDCOMBE BAPTIST CHURCH AT REAR CLAVERTON
EA ID / permit
WXW01257 · 101190
Outlet location
ST7536064290 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
44 / 60
Long-term average
32.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 28 hours spilling →
River Avon 24 28 down 45% 100%
Clevedon Main PS
Storm discharge at pumping station
Company site name
CLEVEDON MAIN
EA ID / permit
WXW00299 · 102134
Outlet location
ST3923070290 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
Bathing water
Clevedon Beach
2024 spills / hours
18 / 68
Long-term average
11.3 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 27 hours spilling →
Bristol Channel 10 27 down 44% 100%
Roman Road Combined Sewer Overflow
Overflow on sewer network
Company site name
WEYMOUTH ROMAN ROAD NEW
EA ID / permit
WXW00938 · 401188
Outlet location
SY6721080970 (OS grid reference) · View on Apple Maps
WFD catchment
Wey (GB108044010210)
2024 spills / hours
46 / 49
Long-term average
41.8 spills a year (monitored since 2021)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 27 hours spilling →
Radipole Lake (S) 38 27 down 17% 100%
Bloomfield Road CSO
Overflow on sewer network
Company site name
BATH BLOOMFIELD ROAD NO 33 JUNCTION WITH HENSLEY ROAD
EA ID / permit
WXW00150 · 102778
Outlet location
ST7390865093 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
44 / 44
Long-term average
44.2 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 27 hours spilling →
River Avon via SWS 46 27 up 5% 98%
Newbridge Road CSO
Overflow on sewer network
Company site name
BATH NEWBRIDGE ROAD R/O NO 131
EA ID / permit
WXW00795 · 102919
Outlet location
ST7241064930 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
54 / 62
Long-term average
53.7 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 26 hours spilling →
River Avon(S) 44 26 down 19% 100%
Bridport Water Recycling Centre PS
Storm discharge at pumping station
Company site name
BRIDPORT WEST BAY
EA ID / permit
WXW00179 · 400678
Outlet location
SY4555089120 (OS grid reference) · View on Apple Maps
WFD catchment
Lyme Bay East (GB620806560000)
2024 spills / hours
17 / 76
Long-term average
11.6 spills a year (monitored since 2021)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 26 hours spilling →
Lyme Bay (C) 8 26 down 53% 100%
Potterne WRC
Storm tank at sewage works
Sewage works
Potterne
Company site name
POTTERNE STORM TANK
EA ID / permit
WXW00882 · 102629
Outlet location
ST9871759139 (OS grid reference) · View on Apple Maps
WFD catchment
Poulshot Str - source to conf Summerham Bk (GB109053022190)
2024 spills / hours
25 / 80
Long-term average
16.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 26 hours spilling →
Semington Brook 8 26 down 68% 100%
Home Farm CSO
Overflow on sewer network
Company site name
STON EASTON HOME FARM SO
EA ID / permit
WXW00559 · 010772
Outlet location
ST6219554110 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - source to conf Snails Bk (GB109053022250)
2024 spills / hours
29 / 57
Long-term average
32.0 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 26 hours spilling →
Trib of Wellow Brook 30 26 up 3% 90%
Hinton St George PS
Storm discharge at pumping station
Company site name
HINTON ST GEORGE
EA ID / permit
WXW00547 · 102398
Outlet location
ST4226012250 (OS grid reference) · View on Apple Maps
WFD catchment
Merriot Stream (GB108052015290)
2024 spills / hours
32 / 40
Long-term average
31.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 26 hours spilling →
Merriott Stream(S) 21 26 down 34% 100%
Fordingbridge CSO
Overflow on sewer network
Company site name
FORDINGBRIDGE SALISBURY STREET
EA ID / permit
WXW00437 · 401949
Outlet location
SU1500014360 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (Middle) (GB108043015841)
Bathing water
River Avon at Fordingbridge
2024 spills / hours
92 / 1,119
Long-term average
54.5 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 26 hours spilling →
River Avon(S) 31 26 down 66% 100%
Palmersford Water Recycling Centre
Storm tank at sewage works
Sewage works
Palmersford
Company site name
PALMERSFORD STORM TANK
EA ID / permit
WXW00837 · 401485
Outlet location
SZ1052097140 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
Bathing water
Christchurch Avon Beach; Christchurch Friar`s Cliff
2024 spills / hours
18 / 105
Long-term average
5.2 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 26 hours spilling →
River Stour 2 26 down 89% 100%
Upper Bristol Road CSO
Overflow on sewer network
Company site name
BATH UPPER BRISTOL ROAD ADJ MARLBOROUGH LANE
EA ID / permit
WXW01170 · 010898
Outlet location
ST7414865002 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
57 / 58
Long-term average
54.8 spills a year (monitored since 2019)
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 25 hours spilling →
River Avon 50 25 down 12% 97%
Recreation Ground 2 CSO
Overflow on sewer network
Company site name
BOX RECREATION GROUND (ADJ TO)
EA ID / permit
WXW00923 · 101679
Outlet location
ST8232768729 (OS grid reference) · View on Apple Maps
WFD catchment
By Bk - conf Doncombe Bk to conf R Avon (Brist) (GB109053027380)
2024 spills / hours
50 / 47
Long-term average
47.9 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 25 hours spilling →
By Brook 43 25 down 14% 100%
Longbridge Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Longbridge
Company site name
LONGBRIDGE FOSSE WAY SEAVINGTON INLET
EA ID / permit
WXW01337 · 101620
Outlet location
ST4181014010 (OS grid reference) · View on Apple Maps
WFD catchment
Lopen Brook (GB108052015330)
2024 spills / hours
– / –
Long-term average
22.4 spills a year
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 25 hours spilling →
Lopen Stream(S) 8 25 100%
Somervale Road Combined Sewer of
Overflow on sewer network
Company site name
RADSTOCK SOMERVALE ROAD REAR KHANDALLA WELTON ROAD
EA ID / permit
WXW01008 · 021352
Outlet location
ST6827454813 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - source to conf Snails Bk (GB109053022250)
2024 spills / hours
53 / 53
Long-term average
56.0 spills a year (monitored since 2019)
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 25 hours spilling →
Wellow Brook 40 25 down 25% 100%
Ladymead House CSO
Overflow on sewer network
Company site name
BATH LADYMEAD HOUSE (R/O) WALCOT
EA ID / permit
WXW00609 · 103043
Outlet location
ST7517165389 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
49 / 140
Long-term average
35.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 25 hours spilling →
River Avon 25 25 down 49% 100%
CSO at Princes Bridge
Overflow on sewer network
Company site name
DORCHESTER PRINCES BRIDGE
EA ID / permit
WXW00351 · 400684
Outlet location
SY7001090590 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691)
2024 spills / hours
7 / 23
Long-term average
3.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 25 hours spilling →
(S) Mill Stream 3 25 down 57% 100%
Sunny Mount CSO
Overflow on sewer network
Company site name
SHEPTON MALLET SUNNY MOUNT/HAM LANE
EA ID / permit
WXW01088 · 103409
Outlet location
ST6115043990 (OS grid reference) · View on Apple Maps
WFD catchment
Sheppey (GB108052021221)
2024 spills / hours
56 / 352
Long-term average
20.6 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement ongoing
Volume & pollution
Estimate from 24 hours spilling →
River Sheppey 15 24 down 73% 100%
Hinton St.Mary Water Recycling
Inlet overflow at sewage works
Sewage works
Hinton St Mary Water Recycling
Company site name
HINTON ST MARY INLET
EA ID / permit
WXW00548 · 040040
Outlet location
ST7974116121 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Middle u/s Pimperne Brook) (GB108043016051)
2024 spills / hours
53 / 27
Long-term average
43.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 24 hours spilling →
Trib of Chivericks Brook 29 24 down 45% 100%
Lansdown Lane Combined Sewer O'Flow
Overflow on sewer network
Company site name
BATH LANSDOWN LANE / HIGH STREET JUNCTION WESTON
EA ID / permit
WXW00619 · 012179
Outlet location
ST7349865042 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
35 / 67
Long-term average
27.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 24 hours spilling →
River Avon via SWS 14 24 down 60% 98%
Whitehall Road CSO
Overflow on sewer network
Company site name
BRISTOL WHITEHALL ROAD O/S NO 46
EA ID / permit
WXW01250 · 103016
Outlet location
ST5612074460 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
29 / 39
Long-term average
21.9 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 24 hours spilling →
River Avon via SWS (Estuarine) 22 24 down 24% 100%
Hatch Beauchanp Pumping Station
Storm discharge at pumping station
EA ID / permit
WXW00511 · 070916
Outlet location
ST3064520034 (OS grid reference) · View on Apple Maps
WFD catchment
Fivehead River (GB108052015241)
2024 spills / hours
12 / 65
Long-term average
10.5 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 24 hours spilling →
Tributary of Fivehead River 6 24 down 50% 100%
Slade Road/Combe Road CSO
Overflow on sewer network
Company site name
PORTISHEAD COOMBE/SLADE ROAD JUNCTION
EA ID / permit
WXW00998 · 100557/CS/01
Outlet location
ST4701076250 (OS grid reference) · View on Apple Maps
WFD catchment
Portbury Ditch - source to conf R Severn Estuary (GB109052027330)
2024 spills / hours
34 / 32
Long-term average
28.2 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 23 hours spilling →
Tributary of Portbury Ditch 26 23 down 24% 100%
Pardy'S Hill PS
Storm discharge at pumping station
Company site name
CORFE MULLEN PARDYS HILL
EA ID / permit
WXW00840 · 401392
Outlet location
SY9830097600 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Middle d/s Pimperne Brook) (GB108043016052)
2024 spills / hours
18 / 69
Long-term average
16.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 23 hours spilling →
Trib of River Stour(S) 8 23 down 56% 100%
Queens Head Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL QUEENS HEAD PUB QUEENS ROAD RETENTION TANK
EA ID / permit
WXW00907 · 101824
Outlet location
ST5701268181 (OS grid reference) · View on Apple Maps
WFD catchment
The Malago - source to conf R Avon (Brist New Cut) (GB109053021970)
2024 spills / hours
11 / 37
Long-term average
8.0 spills a year (monitored since 2023)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 23 hours spilling →
Trib of the Malago 5 23 down 55% 98%
High Street Pumping Station
Storm discharge at pumping station
Company site name
MARDEN HIGH STREET
EA ID / permit
WXW00532 · 402523
Outlet location
SU0865957654 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (West) (GB108043022370)
2024 spills / hours
18 / 180
Long-term average
5.4 spills a year (monitored since 2021)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 23 hours spilling →
Tributary of the River Avon 3 23 down 83% 100%
Blacknoll
Storm discharge at pumping station
Company site name
EAST KNIGHTON BLACKNOLL
EA ID / permit
WXW00144 · 401166
Outlet location
SY8100086050 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset Trib (River Win) (GB108044009650)
2024 spills / hours
44 / 622
Long-term average
19.5 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 23 hours spilling →
River Win (S) 12 23 down 73% 100%
42 Orchard Vale CSO
Overflow on sewer network
Company site name
BRISTOL KINGSWOOD ORCHARD VALE NEW O/S 42
EA ID / permit
WXW00032 · 101762
Outlet location
ST6672572839 (OS grid reference) · View on Apple Maps
WFD catchment
Siston Bk - source to conf R Avon (Brist) (GB109053027450)
2024 spills / hours
36 / 46
Long-term average
27.0 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 23 hours spilling →
Siston Brook via SWS 30 23 down 17% 100%
Fosse Lane PS
Storm discharge at pumping station
Company site name
SHEPTON MALLET FOSSE LANE CHARLTON
EA ID / permit
WXW00441 · 103573
Outlet location
ST6286843412 (OS grid reference) · View on Apple Maps
WFD catchment
Sheppey (GB108052021221)
2024 spills / hours
10 / 23
Long-term average
3.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 23 hours spilling →
River Sheppey via SWS 5 23 down 50% 100%
Worth Matravers WwTW
Storm tank at sewage works
Sewage works
Worth Matravers
Company site name
WORTH MATRAVERS STORM TANK
EA ID / permit
WXW01289 · 400606
Outlet location
SY9736276843 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
40 / 52
Long-term average
44.3 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 23 hours spilling →
Stream at Winspit Botttom 19 23 down 53% 100%
Hurst Combined Sewer Overflow
Overflow on sewer network
Company site name
MARTOCK HURST NO 22
EA ID / permit
WXW00572 · 013156
Outlet location
ST4573318639 (OS grid reference) · View on Apple Maps
WFD catchment
Wellhams Brook (GB108052015350)
2024 spills / hours
22 / 30
Long-term average
18.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 23 hours spilling →
Trib of Hinton Meads Brook 18 23 down 18% 97%
Cowbridge Combined Sewer Overflow
Overflow on sewer network
Company site name
COWBRIDGE SO
EA ID / permit
WXW00334 · 102302
Outlet location
SS9583342806 (OS grid reference) · View on Apple Maps
WFD catchment
Avill (GB108051020210)
2024 spills / hours
21 / 35
Long-term average
17.7 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 23 hours spilling →
River Avill 13 23 down 38% 100%
Blenheim Road CSO
Overflow on sewer network
Company site name
MINEHEAD BLENHEIM ROAD O/S COASTGUARD COTTAGES
EA ID / permit
WXW00148 · 101774
Outlet location
SS9727047320 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Channel Inner South (GB640807670000)
Bathing water
Minehead Terminus
2024 spills / hours
25 / 46
Long-term average
13.8 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 22 hours spilling →
Bristol Channel (C) 11 22 down 56% 100%
Railway Cottages Pumping Station
Storm discharge at pumping station
Company site name
WOOL RAILWAY COTTAGES
EA ID / permit
WXW00916 · 401164
Outlet location
SY8430086970 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) d/s Louds Mill Dorchester (GB108044009692)
2024 spills / hours
48 / 90
Long-term average
25.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 22 hours spilling →
Trib of River Frome(S) 20 22 down 58% 100%
Seatown Pumping Station
Storm discharge at pumping station
Company site name
CHIDEOCK SEATOWN
EA ID / permit
WXW00968 · 043190
Outlet location
SY4208091780 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Seatown
2024 spills / hours
18 / 77
Long-term average
10.1 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 22 hours spilling →
Winniford (S) 6 22 down 67% 100%
Patney Weir Pumping Station
Storm discharge at pumping station
Company site name
PATNEY WEIR
EA ID / permit
WXW00847 · 401225
Outlet location
SU0732058240 (OS grid reference) · View on Apple Maps
WFD catchment
Etchilhampton Water (GB108043022430)
2024 spills / hours
13 / 82
Long-term average
3.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 22 hours spilling →
River Avon (S) 4 22 down 69% 100%
Hinchcliffe Road CSO
Overflow on sewer network
Company site name
POOLE WOODLANDS AVE/HINCHLIFFE ROAD O/F
EA ID / permit
WXW00543 · 400791
Outlet location
SY9978590898 (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
15 / 31
Long-term average
8.2 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 22 hours spilling →
Holes Bay Estuarine 8 22 down 47% 100%
Kennart Road Pumping Station
Storm discharge at pumping station
Company site name
POOLE KENNART ROAD
EA ID / permit
WXW00587 · EPRQB3993NE
Outlet location
SZ0036893124 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
8 / 28
Long-term average
6.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 22 hours spilling →
Holes Bay via SWS (Estuarine) 6 22 down 25% 100%
Shore Road PS Overflow
Storm discharge at pumping station
Company site name
POOLE SHORE ROAD
EA ID / permit
WXW00991 · 051290
Outlet location
SZ0547787983 (OS grid reference) · View on Apple Maps
WFD catchment
Dorset / Hampshire (GB620705550000)
Bathing water
Poole Shore Road Beach
2024 spills / hours
42 / 43
Long-term average
39.8 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 22 hours spilling →
English Channel 25 22 down 40% 100%
Queen Street CSO
Overflow on sewer network
Company site name
BRISTOL QUEEN STREET / MEADOW STREET
EA ID / permit
WXW00904 · 102069
Outlet location
ST5168378645 (OS grid reference) · View on Apple Maps
WFD catchment
Chestle Pill (GB109054026650)
2024 spills / hours
12 / 34
Long-term average
9.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 22 hours spilling →
River Severn via SWS 6 22 down 50% 100%
Dilton Marsh CSO
Overflow on sewer network
Company site name
DILTON MARSH IN FIELD BEHIND 127 HIGH STREET
EA ID / permit
WXW00366 · 101870
Outlet location
ST8467449886 (OS grid reference) · View on Apple Maps
WFD catchment
Tributary - source to conf Biss Bk (GB109053021760)
2024 spills / hours
25 / 60
Long-term average
16.5 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 22 hours spilling →
Name Given in Relevant Appendi 10 22 down 60% 94%
Lawnwood Combined Sewer Overflow
Overflow on sewer network
Company site name
MALMESBURY GLOUCESTER ROAD O/S 109
EA ID / permit
WXW00622 · 102682
Outlet location
ST9307187758 (OS grid reference) · View on Apple Maps
WFD catchment
Tetbury Avon - unnamed trib to conf Sherston Avon (GB109053027780)
2024 spills / hours
29 / 24
Long-term average
15.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
River Avon (Tetbury Branch) 15 21 down 48% 97%
Woodhill Pumping Station
Storm discharge at pumping station
Company site name
STOKE ST GREGORY WOODHILL
EA ID / permit
WXW01279 · 103188
Outlet location
ST3531527010 (OS grid reference) · View on Apple Maps
WFD catchment
West Sedgemoor Main Drain (GB108052015450)
2024 spills / hours
12 / 138
Long-term average
6.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
Trib of West Sedgemoor M Drain 3 21 down 75% 100%
Wayside Road Pumping Station
Storm discharge at pumping station
Company site name
ST LEONARDS WAYSIDE ROAD NO 1
EA ID / permit
WXW01200 · 402453
Outlet location
SU1096802199 (OS grid reference) · View on Apple Maps
WFD catchment
Moors (GB108043011050)
2024 spills / hours
4 / 21
Long-term average
3.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
Tributary of Moors River 5 21 up 25% 100%
Monkton Park Offices CSO
Overflow on sewer network
Company site name
CHIPPENHAM MONKTON PARK OFFICES
EA ID / permit
WXW00749 · 102551
Outlet location
ST9208673526 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
19 / 97
Long-term average
11.8 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
River Avon 6 21 down 68% 100%
Nethercote Hill Pumping Station
Storm discharge at pumping station
Company site name
LACOCK NETHERCOTE HILL
EA ID / permit
WXW00784 · 010701
Outlet location
ST9176168698 (OS grid reference) · View on Apple Maps
WFD catchment
Bydemill Bk - source to conf RIver Avon (Brist) (GB109053021960)
2024 spills / hours
11 / 61
Long-term average
8.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
Byde Mill Brook 6 21 down 45% 100%
St Georges Park 1 CSO
Overflow on sewer network
Company site name
BRISTOL ST GEORGES PARK SOUTH 28 LYNDALE ROAD
EA ID / permit
WXW01036 · 102883
Outlet location
ST5612074460 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
39 / 54
Long-term average
33.8 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 21 hours spilling →
River Avon (Estuarine) 26 21 down 33% 100%
Stoney Stratton Pumping Station
Storm discharge at pumping station
Company site name
EVERCREECH STONEY STRATTON
EA ID / permit
WXW01074 · 103622
Outlet location
ST6557738981 (OS grid reference) · View on Apple Maps
WFD catchment
Alham (GB108052021160)
2024 spills / hours
4 / 30
Long-term average
3.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
Tributary of River Alham 3 21 down 25% 100%
Broadshard CSO
Overflow on sewer network
Company site name
CREWKERNE NORTH OLD STW SITE
EA ID / permit
WXW00196 · 072347
Outlet location
ST4407510993 (OS grid reference) · View on Apple Maps
WFD catchment
Merriot Stream (GB108052015290)
2024 spills / hours
11 / 14
Long-term average
16.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
Goulds Brook 10 21 down 9% 100%
Myrtle Street CSO
Overflow on sewer network
Company site name
BRISTOL MYRTLE ST IN CAR PARK
EA ID / permit
WXW00767 · 103306
Outlet location
ST5807972113 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
38 / 35
Long-term average
33.8 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 21 hours spilling →
River Avon via SWS (Estuarine) 25 21 down 34% 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.