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
Trickett'S Cross Pumping Station
Storm discharge at pumping station
Company site name
FERNDOWN A31 TRICKETTS CROSS
EA ID / permit
WXW01153 · 401156
Outlet location
SU0912601456 (OS grid reference) · View on Apple Maps
WFD catchment
Uddens Water (GB108043011080)
2024 spills / hours
2 / 8.1
Long-term average
3.1 spills a year (monitored since 2018)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 16 hours spilling →
Uddens Water 3 16 up 50% 100%
Combe Florey STW
Storm tank at sewage works
Sewage works
Combe Florey
Company site name
COMBE FLOREY STORM TANK
EA ID / permit
WXW00313 · 103010
Outlet location
ST1539031300 (OS grid reference) · View on Apple Maps
WFD catchment
Back Stream (GB108052021390)
2024 spills / hours
60 / 1,328
Long-term average
31.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 16 hours spilling →
Tributary of the Back Stream 3 16 down 95% 100%
Landseer Avenue CSO
Overflow on sewer network
Company site name
BRISTOL LANDSEER AVENUE O/S NO 50
EA ID / permit
WXW00613 · 011093
Outlet location
ST6056277033 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
15 / 49
Long-term average
8.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 16 hours spilling →
Trib of Horfield Brook via SWS 9 16 down 40% 100%
Shipton Gorge Pumping Station
Storm discharge at pumping station
Company site name
SHIPTON GORGE OFF MARKETS LANE
EA ID / permit
WXW00988 · NPSWQD008206
Outlet location
SY4985591135 (OS grid reference) · View on Apple Maps
WFD catchment
Bride (GB108044009550)
2024 spills / hours
15 / 82
Long-term average
9.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 15 hours spilling →
Tributary of the River Bride 4 15 down 73% 100%
Child Okeford PS
Storm discharge at pumping station
Company site name
CHILD OKEFORD GOLD HILL
EA ID / permit
WXW00272 · 402218
Outlet location
ST8280013550 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Middle u/s Pimperne Brook) (GB108043016051)
2024 spills / hours
5 / 15
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 15 hours spilling →
Trib of River Stour(S) 4 15 down 20% 100%
Colerne Water Recylcing Centre
Storm tank at sewage works
Sewage works
Colerne Water Recylcing Centre
Company site name
COLERNE STORM TANK
EA ID / permit
WXW00309 · 102713
Outlet location
ST8316669867 (OS grid reference) · View on Apple Maps
WFD catchment
By Bk - conf Doncombe Bk to conf R Avon (Brist) (GB109053027380)
2024 spills / hours
14 / 55
Long-term average
6.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 15 hours spilling →
By Brook 4 15 down 71% 100%
Commercial Road CSO
Overflow on sewer network
Company site name
BRISTOL COMMERCIAL ROAD / BEDMIN BRIDGE
EA ID / permit
WXW00316 · 102830
Outlet location
ST5895072053 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
26 / 66
Long-term average
13.6 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 15 hours spilling →
River Avon (Estuarine) 7 15 down 73% 100%
Bovington Terminal Pumping Station
Storm discharge at pumping station
Company site name
BOVINGTON TERMINAL
EA ID / permit
WXW00158 · 401426
Outlet location
SY8345888000 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) d/s Louds Mill Dorchester (GB108044009692)
2024 spills / hours
6 / 43
Long-term average
3.0 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 15 hours spilling →
A Tributary of the River Frome 3 15 down 50% 100%
East Quay Pumping Station
Storm discharge at pumping station
Company site name
BRIDGWATER EAST QUAY
EA ID / permit
WXW00395 · 071343
Outlet location
ST3005037340 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Burnham Jetty North
2024 spills / hours
43 / 249
Long-term average
36.3 spills a year (monitored since 2017)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 15 hours spilling →
River Parrett (E) 22 15 down 49% 100%
Divers Bridge Pumping Station
Storm discharge at pumping station
Company site name
CHAPMANSLADE DIVERS BRIDGE
EA ID / permit
WXW00369 · 010613
Outlet location
ST8269646992 (OS grid reference) · View on Apple Maps
WFD catchment
Rodden Bk - source to conf R Frome (GB109053022110)
2024 spills / hours
16 / 151
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 15 hours spilling →
Rodden Brook 2 15 down 88% 100%
Water Lane CSO
Overflow on sewer network
Company site name
WOTTON-UNDER-EDGE WATER LANE
EA ID / permit
WXW01195 · 103418
Outlet location
ST7592793130 (OS grid reference) · View on Apple Maps
WFD catchment
Ozleworth Bk - source to conf Little Avon R (GB109054026610)
2024 spills / hours
43 / 115
Long-term average
25.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 15 hours spilling →
Dyers Brook 23 15 down 47% 100%
Holton Heath Ww Pumping Station
Storm discharge at pumping station
Company site name
HOLTON HEATH HOLTON HEATH SEWAGE PUMPING STATION
EA ID / permit
WXW00557 · 041577
Outlet location
SY9517290626 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Poole Harbour Rockley Sands
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
0 / 0.0
Long-term average
2.7 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 14 hours spilling →
Trib of Poole Harbour 6 14 up from 0 100%
Sutton Mallet Pumping Station
Storm discharge at pumping station
Company site name
SUTTON MALLET
EA ID / permit
WXW01091 · 101687
Outlet location
ST3710037022 (OS grid reference) · View on Apple Maps
WFD catchment
King's Sedgemoor Drain - Henley Sluice to mouth (GB108052021150)
2024 spills / hours
6 / 34
Long-term average
3.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 14 hours spilling →
Trib Kings Sedgemoor Drain 2 14 down 67% 100%
Southwell PS
Storm discharge at pumping station
Company site name
PORTLAND SOUTHWELL
EA ID / permit
WXW01022 · 040686
Outlet location
SY6908069880 (OS grid reference) · View on Apple Maps
WFD catchment
Dorset / Hampshire (GB620705550000)
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
22 / 39
Long-term average
13.1 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 14 hours spilling →
Freshwater Bay 12 14 down 45% 100%
Wiltshire Gardens PS
Storm discharge at pumping station
Company site name
BRANSGORE WILTSHIRE GARDENS
EA ID / permit
WXW01263 · 401565
Outlet location
SZ1777097800 (OS grid reference) · View on Apple Maps
WFD catchment
Clockhouse Stream (GB108043011011)
2024 spills / hours
7 / 22
Long-term average
6.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 14 hours spilling →
Clockhouse Stream(S) 7 14 no change 100%
Abbey Road Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL ABBEY ROAD O/S NO 123
EA ID / permit
WXW00057 · 013103
Outlet location
ST5673777541 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
31 / 15
Long-term average
27.3 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 14 hours spilling →
River Trym via SWS 28 14 down 10% 100%
Walcot Terrace CSO
Overflow on sewer network
Company site name
BATH WALCOT TERRACE R/O NO 1 ON LONDON ROAD
EA ID / permit
WXW01183 · 100679
Outlet location
ST7537465704 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
29 / 91
Long-term average
16.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 14 hours spilling →
River Avon 12 14 down 59% 100%
Beechwood Avenue CSO
Overflow on sewer network
Company site name
BRISTOL HANHAM BEECHWOOD AVENUE
EA ID / permit
WXW00123 · 101753
Outlet location
ST6290072190 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
32 / 25
Long-term average
45.5 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 14 hours spilling →
River Avon (via SWS) 23 14 down 28% 100%
Larkhall Terrace CSO
Overflow on sewer network
Company site name
BATH LARKHALL TERRACE FIELD TO REAR
EA ID / permit
WXW00620 · 103902
Outlet location
ST7624766576 (OS grid reference) · View on Apple Maps
WFD catchment
Lam Bk - source to conf R Avon (Brist) (GB109053022300)
2024 spills / hours
36 / 44
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 14 hours spilling →
Lam Brook via SWS 21 14 down 42% 92%
New Inn Pumping Station
Storm discharge at pumping station
Company site name
FRESHFORD NEW INN
EA ID / permit
WXW00788 · 103786
Outlet location
ST7909259965 (OS grid reference) · View on Apple Maps
WFD catchment
Somerset Frome conf with Mells to conf B. Avo (GB109053021840)
2024 spills / hours
16 / 81
Long-term average
7.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 14 hours spilling →
River Frome 4 14 down 75% 100%
Watchet Pumping Station Overflow
Storm discharge at pumping station
Company site name
WATCHET MARKET ST
EA ID / permit
WXW01193 · 101159
Outlet location
ST0700043470 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
21 / 20
Long-term average
14.2 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 14 hours spilling →
Washford River (E) 11 14 down 48% 100%
Bellotts Road CSO
Overflow on sewer network
Company site name
BATH BELLOTTS ROAD
EA ID / permit
WXW00126 · 021452
Outlet location
ST7340764927 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
42 / 48
Long-term average
27.6 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 14 hours spilling →
River Avon via SWS 20 14 down 52% 95%
Coopers Mill CSO
Overflow on sewer network
Company site name
YEOVIL COOPERS MILL HENDFORD
EA ID / permit
WXW00323 · 101783
Outlet location
ST5534115460 (OS grid reference) · View on Apple Maps
WFD catchment
Dodham Brook (Yeo (Somset)) (GB108052015600)
2024 spills / hours
26 / 26
Long-term average
24.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Dodham Brook 25 13 down 4% 100%
Montague House CSO
Overflow on sewer network
Company site name
BATH LAMBRIDGE RUGBY GROUND CARPARK
EA ID / permit
WXW00751 · 010954
Outlet location
ST7634366424 (OS grid reference) · View on Apple Maps
WFD catchment
Lam Bk - source to conf R Avon (Brist) (GB109053022300)
2024 spills / hours
31 / 83
Long-term average
37.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Lam Brook 12 13 down 61% 100%
Whiteway Road Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL WHITEWAY ROAD O/S NO 67
EA ID / permit
WXW01251 · 101798
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
43 / 37
Long-term average
39.7 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 13 hours spilling →
River Avon (E) via SWS 28 13 down 35% 97%
Summer Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
MONKTON COMBE SUMMER LANE
EA ID / permit
WXW01085 · 100509/CS/01
Outlet location
ST7635261625 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - Snails Bk to Bristol Avon (GB109053022271)
2024 spills / hours
37 / 26
Long-term average
33.4 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Horsecombe Brook 27 13 down 27% 100%
Cumberland Road Old Gaol Syphon CSO
Overflow on sewer network
Company site name
BRISTOL CUMBERLAND ROAD OLD GAOL SIPHON
EA ID / permit
WXW00356 · 101080
Outlet location
ST5856772056 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
11 / 31
Long-term average
7.0 spills a year (monitored since 2024)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 13 hours spilling →
River Avon via SWS 3 13 down 73% 100%
Hallatrow S P Stn
Storm discharge at pumping station
Company site name
HALLATROW
EA ID / permit
WXW00492 · 101867
Outlet location
ST6398057270 (OS grid reference) · View on Apple Maps
WFD catchment
Cam Bk - source to conf Wellow Bk (GB109053022290)
2024 spills / hours
24 / 60
Long-term average
16.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 13 hours spilling →
Cam Brook 7 13 down 71% 100%
Kilmersdon Road CSO
Overflow on sewer network
Company site name
RADSTOCK KILMERSDON ROAD SYPHON EO
EA ID / permit
WXW00593 · 013130
Outlet location
ST6892554592 (OS grid reference) · View on Apple Maps
WFD catchment
Snails Bk - source to conf Kilmersdon Str (GB109053022240)
2024 spills / hours
35 / 27
Long-term average
29.5 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Waterside 28 13 down 20% 100%
Ludborne Road CSO
Overflow on sewer network
Company site name
SHERBORNE LUDBORNE ROAD / SOUTH STREET
EA ID / permit
WXW00661 · NPSWQD002502
Outlet location
ST6408016250 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
10 / 37
Long-term average
9.4 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 13 hours spilling →
River Yeo via SWS 10 13 no change 100%
Canford Main Pumping Station
Storm discharge at pumping station
Company site name
CANFORD MAGNA CANFORD MAIN
EA ID / permit
WXW00229 · 040821
Outlet location
SZ0220099000 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
2024 spills / hours
6 / 19
Long-term average
4.8 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Trib River Stour (S) 4 13 down 33% 100%
Trowbridge Road Pumping Station
Storm discharge at pumping station
Company site name
BRATTON TROWBRIDGE ROAD
EA ID / permit
WXW01154 · 103243
Outlet location
ST9099052800 (OS grid reference) · View on Apple Maps
WFD catchment
Bitham Bk - source to conf Biss Bk (GB109053021770)
2024 spills / hours
28 / 107
Long-term average
15.0 spills a year (monitored since 2022)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 13 hours spilling →
Trib of Bitham Brook 7 13 down 75% 100%
Semington Roundabout
Storm discharge at pumping station
Company site name
MELKSHAM SEMINGTON ROUNDABOUT
EA ID / permit
WXW00973 · 100632
Outlet location
ST8964063540 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
11 / 82
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 13 hours spilling →
(S) River Avon 2 13 down 82% 100%
Church Street Pumping Station
Storm discharge at pumping station
Company site name
ABBOTSBURY CHURCH STREET
EA ID / permit
WXW00290 · 401866
Outlet location
SY5771085025 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
19 / 20
Long-term average
11.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 12 hours spilling →
Mill Stream 10 12 down 47% 100%
Old Coach Yard CSO
Overflow on sewer network
Company site name
WOTTON-UNDER-EDGE OLD COACH YARD
EA ID / permit
WXW00822 · 103419
Outlet location
ST7596493210 (OS grid reference) · View on Apple Maps
WFD catchment
Ozleworth Bk - source to conf Little Avon R (GB109054026610)
2024 spills / hours
10 / 3.5
Long-term average
21.7 spills a year (monitored since 2020)
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 12 hours spilling →
Dyers Brook 37 12 up 270% 100%
Mill Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
POULSHOT MILL LANE
EA ID / permit
WXW00732 · 102477
Outlet location
ST9661858872 (OS grid reference) · View on Apple Maps
WFD catchment
Poulshot Str - source to conf Summerham Bk (GB109053022190)
2024 spills / hours
7 / 27
Long-term average
3.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 12 hours spilling →
Trib of Summerham Brook 2 12 down 71% 100%
Fishweir Fields PS
Storm discharge at pumping station
Company site name
BRADPOLE FISHWEIR FOUL
EA ID / permit
WXW00431 · 402030
Outlet location
SY4789193755 (OS grid reference) · View on Apple Maps
WFD catchment
Asker (GB108044009580)
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 12 hours spilling →
River Asker via SWS 3 12 up from 0 100%
Westbury Road Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL WESTBURY ROAD / GRANGE COURT ROAD
EA ID / permit
WXW01233 · 013108
Outlet location
ST5673777541 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
31 / 12
Long-term average
28.2 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 12 hours spilling →
River Trym via SWS 23 12 down 26% 100%
Brassmill Lane (East) CSO
Overflow on sewer network
Company site name
BATH BRASSMILL LANE BETWEEN OSBOURN / AVONDALE ROAD
EA ID / permit
WXW00166 · 010922
Outlet location
ST7240764929 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
27 / 146
Long-term average
10.5 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 12 hours spilling →
River Avon via SWS 6 12 down 78% 100%
Page Lane Pumping Station
Storm discharge at pumping station
Company site name
WEST PENNARD PAGE LANE
EA ID / permit
WXW00836 · 103782
Outlet location
ST5495938813 (OS grid reference) · View on Apple Maps
WFD catchment
Hartlake (GB108052021171)
2024 spills / hours
5 / 17
Long-term average
1.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 12 hours spilling →
Tributary of Ten Foot Rhyne 2 12 down 60% 100%
Wallbridge Combined Sewer Overflow
Overflow on sewer network
Company site name
FROME WALLBRIDGE
EA ID / permit
WXW01185 · 100445
Outlet location
ST7866047800 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Maiden Bradley to Mells) (GB109053022101)
2024 spills / hours
6 / 22
Long-term average
5.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
River Frome 3 11 down 50% 100%
Unit 5 Yeo Leisure Park Combined
Overflow on sewer network
Company site name
YEOVIL UNIT 5 YEO LEISURE PARK
EA ID / permit
WXW01168 · EPRTB3591NX
Outlet location
ST5639515975 (OS grid reference) · View on Apple Maps
WFD catchment
Dodham Brook (Yeo (Somset)) (GB108052015600)
2024 spills / hours
13 / 23
Long-term average
10.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
Dodham Brook via SWS 4 11 down 69% 96%
Avonmouth 'B' Pumping Station
Storm discharge at pumping station
Company site name
BRISTOL VICTORIA ROAD
EA ID / permit
WXW00094 · 012020
Outlet location
ST5167077470 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
4 / 12
Long-term average
1.7 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 11 hours spilling →
River Avon Estuary 5 11 up 25% 100%
Court House Combined Sewer Overflow
Overflow on sewer network
Company site name
MARTOCK CHURCH HOUSE WATER STREET
EA ID / permit
WXW00332 · 013157
Outlet location
ST4611319072 (OS grid reference) · View on Apple Maps
WFD catchment
Wellhams Brook (GB108052015350)
2024 spills / hours
1 / 0.3
Long-term average
0.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
Mill Brook 1 11 no change 100%
Hams Path Combined Sewer Overflow
Overflow on sewer network
Company site name
BEAMINSTER HAMS PLOT SOUTH GATE
EA ID / permit
WXW00497 · 401558
Outlet location
ST4799401077 (OS grid reference) · View on Apple Maps
WFD catchment
Brit (Upper) (GB108044009600)
2024 spills / hours
8 / 11
Long-term average
10.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 11 hours spilling →
River Brit(S) 12 11 up 50% 100%
Henleaze Road CSO
Overflow on sewer network
Company site name
BRISTOL HENLEAZE ROAD / WANSCOW WALK
EA ID / permit
WXW00526 · 100477
Outlet location
ST5801977358 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
25 / 8.9
Long-term average
16.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
Trib of River Trym via SWS 15 11 down 40% 100%
Studland Road Pumping Station
Storm discharge at pumping station
Company site name
CORFE CASTLE STUDLAND ROAD
EA ID / permit
WXW01082 · 401429
Outlet location
SY9605782638 (OS grid reference) · View on Apple Maps
WFD catchment
Corfe River (GB108044010020)
2024 spills / hours
14 / 16
Long-term average
20.9 spills a year (monitored since 2019)
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 11 hours spilling →
Corfe River 10 11 down 29% 100%
Hillburn Road CSO
Overflow on sewer network
Company site name
BRISTOL HILLBURN ROAD / AVENING ROAD
EA ID / permit
WXW00538 · 101794
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
52 / 107
Long-term average
55.0 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 11 hours spilling →
River Avon (E) via SWS 18 11 down 65% 100%
Third Way CSO
Overflow on sewer network
Company site name
BRISTOL THIRD WAY
EA ID / permit
WXW01134 · 102070
Outlet location
ST5132579837 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
20 / 69
Long-term average
18.5 spills a year (monitored since 2019)
Monitor below 90%
Telemetry or data archiving failure / issue · Scheduled
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
River Severn Estuary via SWS 2 11 down 90% 89%
Milborne St. Andrew STW
Storm tank at sewage works
Sewage works
Milborne St Andrew
Company site name
MILBORNE ST ANDREW STORM TANK
EA ID / permit
WXW00725 · 042116
Outlet location
SY8025096490 (OS grid reference) · View on Apple Maps
WFD catchment
Bere Stream (GB108044009630)
2024 spills / hours
45 / 853
Long-term average
27.3 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 11 hours spilling →
Bere Stream(S) 2 11 down 96% 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.