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
Limington Pumping Station
Storm discharge at pumping station
Company site name
LIMINGTON MAIN
EA ID / permit
WXW00630 · 102569
Outlet location
ST5390022429 (OS grid reference) · View on Apple Maps
WFD catchment
Bearley Brook (GB108052015610)
2024 spills / hours
70 / 1,012
Long-term average
49.6 spills a year (monitored since 2021)
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 534 hours spilling →
Trib of River Yeo 37 534 down 47% 100%
Langford Pumping Station
Storm discharge at pumping station
Company site name
LANGFORD BLACKMOOR ROAD
EA ID / permit
WXW00616 · 012883
Outlet location
ST4635061120 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo - source to conf Congresbury Yeo (GB109052021640)
2024 spills / hours
46 / 791
Long-term average
34.0 spills a year (monitored since 2021)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 533 hours spilling →
Langford Brook (S) 33 533 down 28% 100%
Compton Dando Sewage Pumping Statio
Storm discharge at pumping station
Company site name
COMPTON DANDO TURNBRIDGE
EA ID / permit
WXW00318 · 103604
Outlet location
ST6474064690 (OS grid reference) · View on Apple Maps
WFD catchment
Chew - conf Winford Bk to conf R Avon (Brist) (GB109053021950)
2024 spills / hours
82 / 1,274
Long-term average
44.5 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 528 hours spilling →
River Chew(S) 39 528 down 52% 100%
Church Lane Farm PS
Storm discharge at pumping station
Company site name
WINGFIELD CHURCH LANE
EA ID / permit
WXW00282 · 102026
Outlet location
ST8257056750 (OS grid reference) · View on Apple Maps
WFD catchment
Lambrok Str - source to conf R Biss (GB109053021800)
2024 spills / hours
81 / 1,192
Long-term average
59.8 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 524 hours spilling →
Trib of Lam Brook Stream 40 524 down 51% 100%
Rode Water Recycling Centre
Storm tank at sewage works
Sewage works
Rode
Company site name
RODE STORM TANK
EA ID / permit
WXW00936 · 011560
Outlet location
ST8039554549 (OS grid reference) · View on Apple Maps
WFD catchment
Somerset Frome conf with Mells to conf B. Avo (GB109053021840)
Bathing water
River Frome at Farleigh Hungerford
2024 spills / hours
82 / 1,147
Long-term average
65.9 spills a year (monitored since 2017)
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 522 hours spilling →
Somerset Frome(S) 39 522 down 52% 100%
Toller Porcorum WRC
Inlet overflow at sewage works
Sewage works
Toller Porcorum
Company site name
TOLLER PORCORUM TOLLER LANE INLET
EA ID / permit
WXW01143 · 400607
Outlet location
SY5669897970 (OS grid reference) · View on Apple Maps
WFD catchment
Hooke (GB108044009800)
2024 spills / hours
67 / 575
Long-term average
51.2 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 521 hours spilling →
River Hooke 35 521 down 48% 100%
Holwell STW
Inlet overflow at sewage works
Sewage works
Holwell
Company site name
HOLWELL NEW
EA ID / permit
WXW00558 · 401159
Outlet location
ST7110010790 (OS grid reference) · View on Apple Maps
WFD catchment
Caundle Brook (Lower) (GB108043015960)
2024 spills / hours
63 / 858
Long-term average
52.5 spills a year (monitored since 2024)
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 519 hours spilling →
The Caundle Brook(S) 42 519 down 33% 100%
Almondsbury WwTW
Storm tank at sewage works
Sewage works
Almondsbury
Company site name
ALMONDSBURY STORM TANK
EA ID / permit
WXW00078 · 010001
Outlet location
ST5990985033 (OS grid reference) · View on Apple Maps
WFD catchment
Chestle Pill (GB109054026650)
2024 spills / hours
86 / 1,276
Long-term average
63.0 spills a year (monitored since 2024)
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 515 hours spilling →
Sandy Rhine Trib Chestle Pill 40 515 down 53% 100%
Scout Hut CSO
Overflow on sewer network
Company site name
MELKSHAM BATH ROAD OFF ROAD F/O SCOUT HALL
EA ID / permit
WXW00964 · 100630
Outlet location
ST9044164111 (OS grid reference) · View on Apple Maps
WFD catchment
Clackers Bk - source to conf R Avon (Brist) (GB109053021920)
2024 spills / hours
81 / 1,031
Long-term average
55.5 spills a year (monitored since 2018)
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 512 hours spilling →
Clackers Brook 56 512 down 31% 100%
Thingley Water Recycling Centre
Storm tank at sewage works
Sewage works
Thingley
Company site name
THINGLEY COPPERSHELL LANE STORM TANK
EA ID / permit
WXW01133 · 102328
Outlet location
ST9190067590 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
69 / 1,039
Long-term average
49.2 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 509 hours spilling →
Byde Mill Brook/River Avon 38 509 down 45% 100%
Ilchester Water Recycling Centre
Storm tank at sewage works
Sewage works
Ilchester
Company site name
ILCHESTER PILL BRIDGE LANE STORM TANK
EA ID / permit
WXW00578 · 101879
Outlet location
ST5156822864 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo Ds Over Compton (GB108052015682)
2024 spills / hours
50 / 587
Long-term average
30.6 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 503 hours spilling →
River Yeo 34 503 down 32% 95%
Melksham WwTW
Inlet overflow at sewage works
Sewage works
Melksham
Company site name
MELKSHAM INLET
EA ID / permit
WXW00707 · 101886
Outlet location
ST9008463899 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
83 / 1,034
Long-term average
60.3 spills a year (monitored since 2022)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 496 hours spilling →
River Avon 51 496 down 39% 100%
Chippenham Water Recycling Centre
Storm tank at sewage works
Sewage works
Chippenham
Company site name
CHIPPENHAM BLACKWELL HAMS STORM TANK
EA ID / permit
WXW00278 · 101637
Outlet location
ST9176371284 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
88 / 1,287
Long-term average
57.7 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
Operational improvement completed
Volume & pollution
Estimate from 492 hours spilling →
River Avon 39 492 down 56% 100%
Ilminster WwTW
Storm tank at sewage works
Sewage works
Ilminster
Company site name
ILMINSTER ASHWELL STORM TANK
EA ID / permit
WXW00579 · 102395
Outlet location
ST3559016190 (OS grid reference) · View on Apple Maps
WFD catchment
Isle - Upper to conf Cad Bk (GB108052015190)
2024 spills / hours
72 / 826
Long-term average
52.0 spills a year (monitored since 2018)
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 491 hours spilling →
River Isle 41 491 down 43% 100%
Pitney Pumping Station
Storm discharge at pumping station
Company site name
PITNEY
EA ID / permit
WXW00861 · 103180
Outlet location
ST4412228450 (OS grid reference) · View on Apple Maps
WFD catchment
King's Sedgemoor Drain - Henley Sluice to mouth (GB108052021150)
2024 spills / hours
56 / 939
Long-term average
46.0 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 484 hours spilling →
Tributary of Low Ham Rhyne 35 484 down 38% 100%
Yeovilton Weir Pumping Station
Storm discharge at pumping station
Company site name
YEOVILTON WEIR
EA ID / permit
WXW01296 · 101765
Outlet location
ST5452022700 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo Ds Over Compton (GB108052015682)
2024 spills / hours
6 / 72
Long-term average
82.0 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 483 hours spilling →
River Yeo (S) 50 483 up 733% 100%
Martock Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Martock
Company site name
MARTOCK HURST BOW STORM TANK
EA ID / permit
WXW00697 · 100288
Outlet location
ST4439019940 (OS grid reference) · View on Apple Maps
WFD catchment
Wellhams Brook (GB108052015350)
2024 spills / hours
95 / 1,112
Long-term average
59.6 spills a year (monitored since 2018)
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 482 hours spilling →
Parrett and Hinton Meads Brook 39 482 down 59% 100%
Bishops Caundle - Blind Lane Off A3030 - Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Bishops Caundle Blind Lane Off A3030
EA ID / permit
WXW01315 · Unpermitted
Outlet location
ST7038012600 (OS grid reference) · View on Apple Maps
WFD catchment
Caundle Brook (Lower) (GB108043015960)
2024 spills / hours
– / –
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 477 hours spilling →
Caundle Brook 27 477 100%
Aust Village Pumping Station
Storm discharge at pumping station
Company site name
AUST VILLAGE
EA ID / permit
WXW00090 · 010692
Outlet location
ST5743088975 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
50 / 866
Long-term average
41.7 spills a year (monitored since 2023)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 468 hours spilling →
Foss Ditch 32 468 down 36% 100%
Bulbury Lane Pumping Station
Storm discharge at pumping station
Company site name
LYTCHETT MATRAVERS BULBURY LANE
EA ID / permit
WXW00210 · 401452
Outlet location
SY9370094150 (OS grid reference) · View on Apple Maps
WFD catchment
Sherford River (GB108044010100)
2024 spills / hours
64 / 705
Long-term average
59.1 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 467 hours spilling →
Trib of Sherford River (S) 49 467 down 23% 100%
Tintinhull and Ash WwTW
Storm tank at sewage works
Sewage works
Tintinhull And Ash
Company site name
TINTINHULL ASH BEARLEY LANE STORM TANK
EA ID / permit
WXW01138 · 071609
Outlet location
ST4897020810 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo Ds Over Compton (GB108052015682)
2024 spills / hours
89 / 1,186
Long-term average
50.8 spills a year (monitored since 2020)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 465 hours spilling →
Trib of Witcombe Bottom Drain 41 465 down 54% 100%
Shepton Mallet WwTW
Storm tank at sewage works
Sewage works
Shepton Mallet
Company site name
SHEPTON MALLET DARSHILL STORM TANK
EA ID / permit
WXW00983 · 101543
Outlet location
ST6030043970 (OS grid reference) · View on Apple Maps
WFD catchment
Sheppey (GB108052021221)
2024 spills / hours
98 / 1,976
Long-term average
53.9 spills a year (monitored since 2018)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 460 hours spilling →
River Sheppey 36 460 down 63% 100%
Broadmayne WwTW
Storm tank at sewage works
Sewage works
Broadmayne
Company site name
BROADMAYNE WEST KNIGHTON ROAD STORM TANK
EA ID / permit
WXW00191 · 040725
Outlet location
SY7341086760 (OS grid reference) · View on Apple Maps
WFD catchment
Tadnoll Brook (including Empool Bottom) (GB108044009660)
2024 spills / hours
86 / 1,399
Long-term average
56.6 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 460 hours spilling →
Tadnoll Brook 32 460 down 63% 100%
Highbridge Pumping Station
Other storm discharge asset type
Company site name
HIGHBRIDGE NEWTON STORM TANKS
EA ID / permit
WXW00536 · 102480
Outlet location
ST3115047340 (OS grid reference) · View on Apple Maps
WFD catchment
PARRETT (GB540805210900)
Bathing water
Burnham Jetty North
2024 spills / hours
13 / 27
Long-term average
42.8 spills a year (monitored since 2017)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 444 hours spilling →
River Brue (E) 33 444 up 154% 100%
Milverton WwTW
Storm tank at sewage works
Sewage works
Milverton
Company site name
MILVERTON STORM TANK
EA ID / permit
WXW00742 · 070076
Outlet location
ST1337025890 (OS grid reference) · View on Apple Maps
WFD catchment
Hillfarrance Bk (GB108052015510)
2024 spills / hours
97 / 918
Long-term average
63.0 spills a year (monitored since 2018)
High-spill reason (company)
Not Applicable - Ongoing investigation
Monitor below 90%
Capital / maintenance works affect EDM operation · Resolved - Mar
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 444 hours spilling →
Hillfarrance Brook 35 444 down 64% 90%
Stogursey Water Recycling Centre
Storm tank at sewage works
Sewage works
Stogursey
Company site name
STOGURSEY STORM TANK
EA ID / permit
WXW01066 · 101438
Outlet location
ST2046843363 (OS grid reference) · View on Apple Maps
WFD catchment
Stogursey BK (GB108052021340)
2024 spills / hours
49 / 553
Long-term average
25.0 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 443 hours spilling →
Stogursey Brook 29 443 down 41% 100%
Hatch Beauchamp WRC
Inlet overflow at sewage works
Sewage works
Hatch Beauchamp
Company site name
HATCH BEAUCHAMP PALMER GREEN INLET
EA ID / permit
WXW00510 · 070053
Outlet location
ST3070219656 (OS grid reference) · View on Apple Maps
WFD catchment
Fivehead River (GB108052015241)
2024 spills / hours
72 / 515
Long-term average
125.9 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 432 hours spilling →
Fivehead River 70 432 down 3% 100%
Ashill STW
Inlet overflow at sewage works
Sewage works
Ashill
Company site name
ASHILL MAIN INLET
EA ID / permit
WXW00085 · 102972
Outlet location
ST3217017880 (OS grid reference) · View on Apple Maps
WFD catchment
Fivehead River (GB108052015241)
2024 spills / hours
73 / 500
Long-term average
72.5 spills a year (monitored since 2024)
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 431 hours spilling →
Venner'S Water(S) 72 431 down 1% 100%
Crewkerne East STW
Storm tank at sewage works
Sewage works
Crewkerne East
Company site name
CREWKERNE TRADING ESTATE CREWKERNE EAST STORM TANK
EA ID / permit
WXW00344 · 101456
Outlet location
ST4508309655 (OS grid reference) · View on Apple Maps
WFD catchment
Parrett - headwaters to Broad River (GB108052015260)
2024 spills / hours
57 / 483
Long-term average
46.0 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 424 hours spilling →
Crewkerne Stream (S) 43 424 down 25% 100%
Cranmore Water Recycling Centre
Inlet overflow at sewage works
Sewage works
Cranmore
Company site name
CRANMORE INLET
EA ID / permit
WXW00340 · 102219
Outlet location
ST6931443533 (OS grid reference) · View on Apple Maps
WFD catchment
Whatley Bk - source to conf Mells R (GB109053021990)
2024 spills / hours
60 / 539
Long-term average
50.7 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 422 hours spilling →
Whatley Brook 37 422 down 38% 100%
Westwood Water Recycling Centre
Storm tank at sewage works
Sewage works
Westwood
Company site name
WESTWOOD STORM TANK
EA ID / permit
WXW01243 · 102716
Outlet location
ST8052858559 (OS grid reference) · View on Apple Maps
WFD catchment
Somerset Frome conf with Mells to conf B. Avo (GB109053021840)
2024 spills / hours
62 / 1,037
Long-term average
34.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 421 hours spilling →
Tributary of River Frome 30 421 down 52% 99%
Nightingales Bridge CSO
Overflow on sewer network
Company site name
FRAMPTON COTTERELL WEST END NIGHTINGALES BRIDGE
EA ID / permit
WXW00798 · 101031
Outlet location
ST6626081350 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - conf Laddon Bk to conf Folly Bk (GB109053027820)
2024 spills / hours
107 / 1,058
Long-term average
71.3 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Env Act (SODRP) improvement completed, UWWTR improvement completed
Volume & pollution
Estimate from 420 hours spilling →
River Frome 60 420 down 44% 100%
Cannington Sewage Treatment Works
Storm tank at sewage works
Sewage works
Cannington
Company site name
CANNINGTON STORM TANK
EA ID / permit
WXW00231 · 101442
Outlet location
ST2693039370 (OS grid reference) · View on Apple Maps
WFD catchment
Cannington Bk - Lower (GB108052021310)
2024 spills / hours
94 / 1,023
Long-term average
56.3 spills a year (monitored since 2018)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 415 hours spilling →
Cannington Brook (S) 38 415 down 60% 99%
Norton Sub Hamdon Pumping Station
Storm discharge at pumping station
Company site name
NORTON SUB HAMDON
EA ID / permit
WXW00813 · 103178
Outlet location
ST4681215495 (OS grid reference) · View on Apple Maps
WFD catchment
Parrett - Lopen Bk to R Isle (GB108052015360)
2024 spills / hours
48 / 449
Long-term average
39.7 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 414 hours spilling →
Tributary of River Parrett 35 414 down 27% 100%
Box Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Box
Company site name
BOX MILL LANE STORM TANK
EA ID / permit
WXW00161 · 010528
Outlet location
ST8235568829 (OS grid reference) · View on Apple Maps
WFD catchment
By Bk - conf Doncombe Bk to conf R Avon (Brist) (GB109053027380)
2024 spills / hours
92 / 943
Long-term average
62.1 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 414 hours spilling →
By Brook (S) 45 414 down 51% 97%
Chideock STW
Storm tank at sewage works
Sewage works
Chideock
Company site name
CHIDEOCK MILL LANE STORM TANK
EA ID / permit
WXW00269 · 401068
Outlet location
SY4254092240 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Seatown
2024 spills / hours
60 / 739
Long-term average
55.4 spills a year (monitored since 2017)
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 413 hours spilling →
River Winniford(S) 31 413 down 48% 100%
Kilve Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Kilve
Company site name
KILVE BEACH CAR PARK STORM TANK
EA ID / permit
WXW00594 · 102917
Outlet location
ST1422144659 (OS grid reference) · View on Apple Maps
WFD catchment
Bridgwater Bay (GB670807410000)
2024 spills / hours
97 / 1,592
Long-term average
47.2 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
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 408 hours spilling →
Bristol Channel (Coastal) 37 408 down 62% 100%
Radstock Water Recycling Centre
Storm tank at sewage works
Sewage works
Radstock
Company site name
RADSTOCK MILL LANE STORM TANK
EA ID / permit
WXW00913 · 102630
Outlet location
ST6993355139 ST7002355137 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - Snails Bk to Bristol Avon (GB109053022271)
2024 spills / hours
85 / 937
Long-term average
68.0 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 407 hours spilling →
Wellow Brook 49 407 down 42% 100%
Evershot Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Evershot
Company site name
EVERSHOT OFF EAST HILL STORM TANK
EA ID / permit
WXW00413 · 042453
Outlet location
ST5781104386 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Headwaters) (GB108044009620)
2024 spills / hours
92 / 917
Long-term average
54.4 spills a year (monitored since 2018)
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 406 hours spilling →
River Frome 45 406 down 51% 100%
Bridport Sewage Treatment Works
Storm tank at sewage works
Sewage works
Bridport
Company site name
BRIDPORT WYCH FARM STORM TANK
EA ID / permit
WXW00178 · 400673
Outlet location
SY4555089120 (OS grid reference) · View on Apple Maps
WFD catchment
Lyme Bay East (GB620806560000)
2024 spills / hours
86 / 705
Long-term average
60.0 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 401 hours spilling →
Lyme Bay(C) 52 401 down 40% 100%
Stalbridge Pumping Station
Storm discharge at pumping station
Company site name
STALBRIDGE
EA ID / permit
WXW01046 · 050979
Outlet location
ST7469017394 (OS grid reference) · View on Apple Maps
WFD catchment
Stour Trib (Bibbern Brook) (GB108043016060)
2024 spills / hours
60 / 585
Long-term average
42.4 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 400 hours spilling →
Bibbern Brook 40 400 down 33% 100%
Calne Pumping Station
Storm discharge at pumping station
Company site name
CALNE ROUGH LEAZE
EA ID / permit
WXW00221 · 101356
Outlet location
SU0054668777 (OS grid reference) · View on Apple Maps
WFD catchment
Marden - source to conf Cowage Bk (GB109053022050)
2024 spills / hours
36 / 465
Long-term average
31.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 396 hours spilling →
River Marden 23 396 down 36% 100%
Wick Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Wick
Company site name
WICK MANOR ROAD STORM TANK
EA ID / permit
WXW01253 · 011563
Outlet location
ST6926071930 (OS grid reference) · View on Apple Maps
WFD catchment
Boyd - source to conf R Avon (Brist) (GB109053027510)
2024 spills / hours
56 / 690
Long-term average
37.1 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 393 hours spilling →
River Boyd 33 393 down 41% 100%
Flisteridge PS
Storm discharge at pumping station
Company site name
UPPER MINETY FLISTERIDGE
EA ID / permit
WXW00433 · 102549
Outlet location
SU0017091090 (OS grid reference) · View on Apple Maps
WFD catchment
Swill Brook (source to Ashton Keynes) (GB106039023700)
2024 spills / hours
48 / 636
Long-term average
34.1 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 393 hours spilling →
Braydon Brook (S) 29 393 down 40% 95%
Sherborne WwTW
Storm tank at sewage works
Sewage works
Sherborne
Company site name
SHERBORNE WEST MILL LANE STORM TANK
EA ID / permit
WXW00985 · 070099
Outlet location
ST6301515348 (OS grid reference) · View on Apple Maps
WFD catchment
Yeo (GB108052015630)
2024 spills / hours
44 / 348
Long-term average
25.9 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 392 hours spilling →
River Yeo 35 392 down 20% 100%
Muller Road CSO
Overflow on sewer network
Company site name
BRISTOL MULLER ROAD R/O HORFIELD UNITED REFORM CHURCH
EA ID / permit
WXW00766 · 101849
Outlet location
ST5998076030 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
118 / 645
Long-term average
119.2 spills a year (monitored since 2020)
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 375 hours spilling →
Horfield Brook (S) 98 375 down 17% 100%
Cranborne Water Recycling Centre
Storm tank at sewage works (with treatment)
Sewage works
Cranborne
Company site name
CRANBORNE HIGHER HOLWELL STORM TANK
EA ID / permit
WXW00337 · 040023
Outlet location
SU0660213028 (OS grid reference) · View on Apple Maps
WFD catchment
Crane (Dorset) (GB108043016090)
Treatment
Nature Based Solutions trial
2024 spills / hours
116 / 2,017
Long-term average
69.0 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 375 hours spilling →
River Crane 23 375 down 80% 100%
Meare Green Wrantage PS
Storm discharge at pumping station
Company site name
MEARE GREEN WRANTAGE
EA ID / permit
WXW00704 · 070796
Outlet location
ST2979022360 (OS grid reference) · View on Apple Maps
WFD catchment
West Sedgemoor Main Drain (GB108052015450)
2024 spills / hours
68 / 1,256
Long-term average
44.7 spills a year (monitored since 2020)
Investigation
Operational investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 374 hours spilling →
Trib of Sedgemoor Old Rhyne 24 374 down 65% 100%
Bowerhill Wastewater Treatment Work
Storm tank at sewage works
Sewage works
Bowerhill Wastewater Treatment Work
Company site name
BOWERHILL SHAILS LANE STORM TANK
EA ID / permit
WXW00160 · 102735
Outlet location
ST9031162368 (OS grid reference) · View on Apple Maps
WFD catchment
Avon (Brist) conf R Marden to conf Semington Bk (GB109053027440)
2024 spills / hours
66 / 853
Long-term average
41.3 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 373 hours spilling →
Berryfield Stream(S) 33 373 down 50% 100%
Edford Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Edford
Company site name
EDFORD STORM TANK
EA ID / permit
WXW00402 · 010034
Outlet location
ST6718448659 (OS grid reference) · View on Apple Maps
WFD catchment
Mells source to conf with Somerset Frome (GB109053022020)
2024 spills / hours
61 / 657
Long-term average
68.0 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 366 hours spilling →
Mells River (S) 46 366 down 25% 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.