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

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.

Overflow	Discharges to	Spills 2025	Hours 2025	Spills vs 2024	Monitor uptime
Avonmouth STW Storm tank at sewage works Sewage works Avonmouth Company site name AVONMOUTH KINGSWESTON LANE STORM TANK EA ID / permit WXW00096 · 102107 Outlet location ST5191080700 (OS grid reference) · View on Apple Maps WFD catchment BRISTOL AVON (GB530905415405) Bathing water Clevedon Beach 2024 spills / hours 141 / 2,123 Long-term average 103.5 spills a year High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 865 hours spilling →	Severn Estuary(E)	67	865	down 52%	100%
Winscombe WwTW Storm tank at sewage works Sewage works Winscombe Company site name WINSCOMBE STORM TANK EA ID / permit WXW01269 · 071977 Outlet location ST3999157769 (OS grid reference) · View on Apple Maps WFD catchment Lox Yeo - source to conf Rive Axe (GB109052021580) 2024 spills / hours 101 / 1,657 Long-term average 76.4 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 864 hours spilling →	Lox Yeo River	57	864	down 44%	100%
Bishops Caundle WRC Storm tank at sewage works Sewage works Bishops Caundle Company site name BISHOPS CAUNDLE BLIND LANE OFF A3030 STORM TANK EA ID / permit WXW00136 · 401961 Outlet location ST7038012600 (OS grid reference) · View on Apple Maps WFD catchment Caundle Brook (Lower) (GB108043015960) 2024 spills / hours 76 / 1,241 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 Improvement No improvement action in reporting period Volume & pollution Estimate from 863 hours spilling →	Caundle Brook	46	863	down 39%	100%
Paulton Wastewater Treatment Works Storm tank at sewage works Sewage works Paulton Company site name PAULTON STORM TANK EA ID / permit WXW00848 · 102988 Outlet location ST6561657669 ST6566457626 (OS grid reference) · View on Apple Maps WFD catchment Cam Bk - source to conf Wellow Bk (GB109053022290) 2024 spills / hours 99 / 1,608 Long-term average 95.4 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 Operational improvement completed Volume & pollution Estimate from 844 hours spilling →	Cam Brook	57	844	down 42%	100%
Salisbury (Petersfinger) WRC Storm tank at sewage works Sewage works Salisbury Company site name SALISBURY PETERSFINGER SOUTHAMPTON ROAD STORM TANK EA ID / permit WXW00949 · 401382 Outlet location SU1590928612 SU1690928415 (OS grid reference) · View on Apple Maps WFD catchment Hampshire Avon (Middle) (GB108043015841) 2024 spills / hours 123 / 2,563 Long-term average 58.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 840 hours spilling →	River Avon	51	840	down 59%	100%
Jubilee Lane PS Storm discharge at pumping station Company site name CROMHALL JUBILEE LANE EA ID / permit WXW00584 · 103286 Outlet location ST6942089520 (OS grid reference) · View on Apple Maps WFD catchment Tortworth Bk - source to conf R LIttle Avon (GB109054026590) 2024 spills / hours 127 / 1,098 Long-term average 94.2 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 818 hours spilling →	The Dyer'S Brake(S)	75	818	down 41%	100%
Butcombe Water Recycling Centre Storm tank at sewage works (with treatment) Sewage works Butcombe Company site name BUTCOMBE STORM TANK EA ID / permit WXW00217 · 071124 Outlet location ST5013360124 (OS grid reference) · View on Apple Maps WFD catchment Yeo - source to conf Congresbury Yeo (GB109052021640) Treatment Nature Based Solutions trial 2024 spills / hours 62 / 1,035 Long-term average 68.5 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 818 hours spilling →	Congresbury Yeo and Butcombe	44	818	down 29%	99%
Bourton Water Recycling Centre Storm tank at sewage works Sewage works Bourton Company site name BOURTON SILTON STORM TANK EA ID / permit WXW00157 · 040010 Outlet location ST7863929787 (OS grid reference) · View on Apple Maps WFD catchment Stour (Headwaters) (GB108043022490) 2024 spills / hours 180 / 2,913 Long-term average 123.6 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 812 hours spilling →	River Stour	62	812	down 66%	100%
Wiveliscombe (Style) STW Storm tank at sewage works Sewage works Wiveliscombe Company site name WIVELISCOMBE STYLES STORM TANK EA ID / permit WXW01274 · 102050 Outlet location ST0842028330 (OS grid reference) · View on Apple Maps WFD catchment Hillfarrance Bk (GB108052015510) 2024 spills / hours 132 / 2,118 Long-term average 103.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Jul Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 811 hours spilling →	Trib of Hillfarrance Brook(S)	75	811	down 43%	84%
Tootle Bridge Pumping Station Storm discharge at pumping station Company site name BARTON ST DAVID TOOTLE BRIDGE EA ID / permit WXW01145 · 103177 Outlet location ST5507932658 (OS grid reference) · View on Apple Maps WFD catchment Brue - Tootle Bridge to Clyse Hole (GB108052021182) 2024 spills / hours 116 / 1,972 Long-term average 89.2 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 806 hours spilling →	Tributary of Cunlease Rhyne	45	806	down 61%	100%
Beer Hackett Pumping Station Storm discharge at pumping station Company site name BEER HACKETT EA ID / permit WXW00124 · NPSWQD008609 Outlet location ST5985811677 (OS grid reference) · View on Apple Maps WFD catchment Wriggle (GB108052015570) 2024 spills / hours 51 / 587 Long-term average 49.1 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 791 hours spilling →	Wriggle River	50	791	down 2%	91%
Coleford Wastewater Treatment Works Storm tank at sewage works Sewage works Coleford Company site name COLEFORD STORM TANK EA ID / permit WXW00308 · 010265 Outlet location ST6917148925 (OS grid reference) · View on Apple Maps WFD catchment Mells source to conf with Somerset Frome (GB109053022020) 2024 spills / hours 98 / 1,442 Long-term average 95.3 spills a year (monitored since 2018) 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 780 hours spilling →	Mells River	73	780	down 26%	100%
Frog Lane Pumping Station Storm discharge at pumping station Company site name WEST CAMEL EA ID / permit WXW00450 · 101764 Outlet location ST5753024600 (OS grid reference) · View on Apple Maps WFD catchment Cam - Lower (GB108052015650) 2024 spills / hours 104 / 1,942 Long-term average 63.5 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 760 hours spilling →	River Cam (S)	41	760	down 61%	100%
Norton St Philip WwTW Storm tank at sewage works Sewage works Norton St Philip Company site name NORTON ST PHILIP STORM TANK EA ID / permit WXW00812 · 103269 Outlet location ST7677856130 (OS grid reference) · View on Apple Maps WFD catchment Lyde Bk - source to conf Wellow Bk (GB109053022260) 2024 spills / hours 76 / 1,097 Long-term average 57.8 spills a year (monitored since 2022) 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 757 hours spilling →	Tributary of Norton Brook(S)	47	757	down 38%	100%
Farmborough WwTW Storm tank at sewage works Sewage works Farmborough Company site name FARMBOROUGH STORM TANK EA ID / permit WXW00418 · 102858 Outlet location ST6675060860 (OS grid reference) · View on Apple Maps WFD catchment Newton Bk - source to conf R Avon (Brist) (GB109053021880) 2024 spills / hours 75 / 1,224 Long-term average 52.6 spills a year (monitored since 2018) 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 756 hours spilling →	Conygre Brook	44	756	down 41%	100%
Pewsey Wastewater Treatment Works Storm tank at sewage works Sewage works Pewsey Company site name PEWSEY SALISBURY ROAD STORM TANK EA ID / permit WXW00856 · 042464 Outlet location SU1558559375 (OS grid reference) · View on Apple Maps WFD catchment Hampshire Avon (East) and Woodborough Stream (GB108043022410) 2024 spills / hours 96 / 620 Long-term average 36.7 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 743 hours spilling →	River Avon (Hampshire)	46	743	down 52%	100%
West Bagborough STW Inlet overflow at sewage works Sewage works West Bagborough Company site name WEST BAGBOROUGH INLET EA ID / permit WXW01215 · 071989 Outlet location ST1606033170 (OS grid reference) · View on Apple Maps WFD catchment Back Stream (GB108052021390) 2024 spills / hours 122 / 1,409 Long-term average 93.0 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 737 hours spilling →	Trib of Back Stream (Tone) (S)	64	737	down 48%	100%
Collingbourne Ducis Pumping Station Storm discharge at pumping station Company site name COLLINGBOURNE DUCIS EA ID / permit WXW00312 · 401764 Outlet location SU2434853472 (OS grid reference) · View on Apple Maps WFD catchment Bourne (Hampshire Avon) (GB108043022390) 2024 spills / hours 185 / 1,586 Long-term average 95.3 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 730 hours spilling →	River Bourne	106	730	down 43%	100%
Poyntington Water Recylcing Centre Storm tank at sewage works Sewage works Poyntington Water Recylcing Centre Company site name POYNTINGTON NEAR HILLSIDE FARM STORM TANK EA ID / permit WXW00885 · 071740 Outlet location ST6549519640 (OS grid reference) · View on Apple Maps WFD catchment Yeo (GB108052015630) 2024 spills / hours 114 / 1,375 Long-term average 72.6 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 726 hours spilling →	River Yeo	53	726	down 54%	100%
Portbury Wharf STW Inlet overflow at sewage works Sewage works Portbury Wharf Company site name PORTBURY WHARF THE DROVE PORTBURY INLET EA ID / permit WXW00875 · 100385 Outlet location ST4855078150 (OS grid reference) · View on Apple Maps WFD catchment BRISTOL AVON (GB530905415405) 2024 spills / hours 158 / 566 Long-term average 133.5 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 721 hours spilling →	(E) Severn Estuary	83	721	down 47%	100%
Crowcombe Wastewater Treatment Work Storm tank at sewage works Sewage works Crowcombe Wastewater Treatment Work Company site name CROWCOMBE STORM TANK EA ID / permit WXW00348 · 071889 Outlet location ST1379136594 (OS grid reference) · View on Apple Maps WFD catchment Doniford Stream (GB108051020250) 2024 spills / hours 74 / 1,274 Long-term average 69.5 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 721 hours spilling →	Tributary of Doniford Stream	42	721	down 43%	100%
Cheddar Wastewater Treatment Works Storm tank at sewage works Sewage works Cheddar Company site name CHEDDAR STORM TANK EA ID / permit WXW00261 · 071901 Outlet location ST4474352289 (OS grid reference) · View on Apple Maps WFD catchment Cheddar Yeo - source to conf Stubbingham Rhyne (GB109052021540) 2024 spills / hours 85 / 1,252 Long-term average 63.5 spills a year (monitored since 2020) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 721 hours spilling →	Cheddar Yeo	52	721	down 39%	100%
Camp Road SPS Storm discharge at pumping station Company site name TILSHEAD CAMP ROAD EA ID / permit WXW00226 · 401790 Outlet location SU0353047810 (OS grid reference) · View on Apple Maps WFD catchment Till (Hampshire Avon) (GB108043022570) 2024 spills / hours 60 / 1,283 Long-term average 41.0 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 698 hours spilling →	River Till	33	698	down 45%	100%
Thornbury Sewage Treatment Works Storm tank at sewage works Sewage works Thornbury Company site name THORNBURY STORM TANK EA ID / permit WXW01136 · 102442 Outlet location ST6280092340 (OS grid reference) · View on Apple Maps WFD catchment Oldbury Naite Rhine (GB109054026670) 2024 spills / hours 70 / 1,385 Long-term average 57.3 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 689 hours spilling →	Severn Estuary(E)	35	689	down 50%	100%
Marston Magna Pumping Station Storm discharge at pumping station Company site name MARSTON MAGNA CHURCH LANE EA ID / permit WXW00694 · 101772 Outlet location ST5938022370 (OS grid reference) · View on Apple Maps WFD catchment Corton Denham Stream (GB108052015620) 2024 spills / hours 88 / 1,549 Long-term average 56.7 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 676 hours spilling →	River Yeo (S)	37	676	down 58%	100%
Maiden Newton Water Recycling Centr Storm tank at sewage works Sewage works Maiden Newton Water Recycling Centr Company site name MAIDEN NEWTON DORCHESTER ROAD STORM TANK EA ID / permit WXW00674 · 041353 Outlet location SY6025397176 (OS grid reference) · View on Apple Maps WFD catchment Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691) 2024 spills / hours 106 / 1,935 Long-term average 76.3 spills a year (monitored since 2020) 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 670 hours spilling →	River Frome	41	670	down 61%	100%
Stourton Caundle WRC Storm tank at sewage works Sewage works Stourton Caundle Company site name STOURTON CAUNDLE STORM TANK EA ID / permit WXW01078 · 402296 Outlet location ST7199814587 (OS grid reference) · View on Apple Maps WFD catchment Caundle Brook (Lower) (GB108043015960) 2024 spills / hours 72 / 1,135 Long-term average 54.0 spills a year (monitored since 2022) 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 666 hours spilling →	Caundle Brook	37	666	down 49%	100%
Pucklechurch WwTW Storm tank at sewage works Sewage works Pucklechurch Company site name PUCKLECHURCH STORM TANK EA ID / permit WXW00894 · 010071 Outlet location ST7118075713 (OS grid reference) · View on Apple Maps WFD catchment Boyd - source to conf R Avon (Brist) (GB109053027510) 2024 spills / hours 96 / 1,119 Long-term average 71.9 spills a year (monitored since 2018) 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 657 hours spilling →	Feltham Brook	63	657	down 34%	100%
Meare Wastewater Treatment Works Storm tank at sewage works Sewage works Meare Company site name MEARE STORM TANK EA ID / permit WXW00705 · EPRMP3728GG Outlet location ST4509941737 (OS grid reference) · View on Apple Maps WFD catchment Brue - Clyce Hole to conf North Drain (GB108052021190) 2024 spills / hours 85 / 1,200 Long-term average 75.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 656 hours spilling →	Tributary of the River Brue	53	656	down 38%	100%
Hardington Mandeville WRC Inlet overflow at sewage works Sewage works Hardington Mandeville Company site name HARDINGTON MANDEVILLE WIMBOROUGH LANE INLET EA ID / permit WXW00505 · 070154 Outlet location ST5049712163 (OS grid reference) · View on Apple Maps WFD catchment Chinnock BK (GB108052015310) 2024 spills / hours 72 / 1,037 Long-term average 58.0 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 655 hours spilling →	Chinnock Brook	46	655	down 36%	100%
Tytherington New House Farm Duck St Overflow on sewer network EA ID / permit WXW00774 · Unpermitted Outlet location ST6727988090 (OS grid reference) · View on Apple Maps WFD catchment Laddon Bk - source to conf R Frome (Brist) (GB109053027590) 2024 spills / hours 90 / 1,348 Long-term average 62.0 spills a year (monitored since 2024) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 649 hours spilling →	Mill Farm Drain	34	649	down 62%	100%
Southgate Pumping Station Storm discharge at pumping station Company site name BEAMINSTER SOUTHGATE EA ID / permit WXW01019 · 401557 Outlet location ST4791700952 (OS grid reference) · View on Apple Maps WFD catchment Brit (Upper) (GB108044009600) 2024 spills / hours 69 / 689 Long-term average 67.1 spills a year (monitored since 2018) High-spill reason (company) Not Applicable - Ongoing investigation Investigation UWWTR investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 637 hours spilling →	River Brit	62	637	down 10%	100%
Puncknowle WRC Storm tank at sewage works Sewage works Puncknowle Company site name PUNCKNOWLE NEXT TO GULLY KNAP FARM STORM TANK EA ID / permit WXW00898 · 042618 Outlet location SY5345989626 (OS grid reference) · View on Apple Maps WFD catchment Bride (GB108044009550) 2024 spills / hours 100 / 1,442 Long-term average 51.0 spills a year (monitored since 2020) 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 624 hours spilling →	River Bride	43	624	down 57%	99%
Bradford on Tone WwTW Inlet overflow at sewage works Sewage works Bradford On Tone Company site name BRADFORD ON TONE INLET EA ID / permit WXW00164 · 070006 Outlet location ST1771523485 (OS grid reference) · View on Apple Maps WFD catchment Tone - Wellington to Taunton (GB108052015481) 2024 spills / hours 105 / 1,537 Long-term average 111.7 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 619 hours spilling →	River Tone	53	619	down 50%	100%
Abbotsbury WwTW Storm tank at sewage works Sewage works Abbotsbury Company site name ABBOTSBURY B3157 PORTESHAM ROAD STORM TANK EA ID / permit WXW00059 · 040001 Outlet location SY5885584921 (OS grid reference) · View on Apple Maps WFD catchment Not part of a river WB catchment 2024 spills / hours 129 / 2,325 Long-term average 46.4 spills a year (monitored since 2018) 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 617 hours spilling →	Abbotsbury Brook	40	617	down 69%	100%
East Chinnock WwTW Storm tank at sewage works Sewage works East Chinnock Company site name EAST CHINNOCK STORM TANK EA ID / permit WXW00391 · 102510 Outlet location ST4925812799 (OS grid reference) · View on Apple Maps WFD catchment Chinnock BK (GB108052015310) 2024 spills / hours 74 / 809 Long-term average 60.6 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement Operational improvement completed Volume & pollution Estimate from 612 hours spilling →	Chinnock Brook	50	612	down 32%	97%
Glastonbury Water Recycling Centre Storm tank at sewage works Sewage works Glastonbury Company site name GLASTONBURY THE BECKERY STORM TANK EA ID / permit WXW00464 · 101431 Outlet location ST4819438006 ST4880638509 (OS grid reference) · View on Apple Maps WFD catchment Brue - Clyce Hole to conf North Drain (GB108052021190) 2024 spills / hours 92 / 1,410 Long-term average 64.4 spills a year (monitored since 2017) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 604 hours spilling →	Glast Mill Stream & River Brue	49	604	down 47%	99%
Seend Wastewater Treatment Works Storm tank at sewage works Sewage works Seend Company site name SEEND STORM TANK EA ID / permit WXW00969 · 102715 Outlet location ST9538261180 (OS grid reference) · View on Apple Maps WFD catchment Summerham Brook (GB109053022220) 2024 spills / hours 82 / 1,373 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 602 hours spilling →	Seend Hill Stream(S)	33	602	down 60%	100%
Alveston Wastewater Treatment Works Storm tank at sewage works Sewage works Alveston Company site name ALVESTON LOWER HAZEL STORM TANK EA ID / permit WXW00080 · 010002 Outlet location ST6214087040 (OS grid reference) · View on Apple Maps WFD catchment Chestle Pill (GB109054026650) 2024 spills / hours 105 / 2,045 Long-term average 55.8 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 591 hours spilling →	Tockington Mill Rhine	40	591	down 62%	100%
Netherbury Pumping Station Storm discharge at pumping station Company site name NETHERBURY BEAMINSTER EA ID / permit WXW00783 · 402106 Outlet location SY4721899206 (OS grid reference) · View on Apple Maps WFD catchment Brit (Upper) (GB108044009600) 2024 spills / hours 79 / 853 Long-term average 57.0 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 588 hours spilling →	River Brit	52	588	down 34%	99%
Trudoxhill Pumping Station Storm discharge at pumping station Company site name TRUDOXHILL EA ID / permit WXW01156 · 102700 Outlet location ST7511043708 (OS grid reference) · View on Apple Maps WFD catchment Frome - source to conf Maiden Bradley Bk (GB109053022080) 2024 spills / hours 81 / 843 Long-term average 54.7 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 ongoing Improvement Env Act (SODRP) improvement ongoing, Operational improvement ongoing Volume & pollution Estimate from 584 hours spilling →	Tributary of River Frome	53	584	down 35%	100%
Yeovil Without STW Storm tank at sewage works Sewage works Yeovil Without Company site name YEOVIL WITHOUT OFF STONE LANE STORM TANK EA ID / permit WXW01295 · 071670 Outlet location ST5607018720 (OS grid reference) · View on Apple Maps WFD catchment Bearley Brook (GB108052015610) 2024 spills / hours 101 / 1,142 Long-term average 73.0 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 572 hours spilling →	Tributary of the Bearley Brook	44	572	down 56%	100%
Dorchester (Louds Mill) STW Storm tank at sewage works Sewage works Dorchester Company site name DORCHESTER LOUDS MILL ST GEORGES ROAD STORM TANK EA ID / permit WXW00374 · 401050 Outlet location SY7116090340 (OS grid reference) · View on Apple Maps WFD catchment Frome Dorset (Lower) d/s Louds Mill Dorchester (GB108044009692) 2024 spills / hours 110 / 1,067 Long-term average 52.6 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Env Act (SODRP) improvement ongoing, Operational improvement completed Volume & pollution Estimate from 562 hours spilling →	River Frome(S)	36	562	down 67%	100%
Shillingstone Water Recycling Centr Storm tank at sewage works Sewage works Shillingstone Water Recycling Centr Company site name SHILLINGSTONE STORM TANK EA ID / permit WXW00987 · 401340 Outlet location ST8383010560 (OS grid reference) · View on Apple Maps WFD catchment Stour (Middle u/s Pimperne Brook) (GB108043016051) 2024 spills / hours 119 / 1,676 Long-term average 82.6 spills a year (monitored since 2021) High-spill reason (company) Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement Env Act (SODRP) improvement completed, UWWTR improvement completed Volume & pollution Estimate from 560 hours spilling →	River Stour	45	560	down 62%	100%
Shapwick Pumping Station Storm discharge at pumping station Company site name SHAPWICK SOMERSET EA ID / permit WXW00978 · 072077 Outlet location ST4175038740 (OS grid reference) · View on Apple Maps WFD catchment South Drain (GB108052021181) 2024 spills / hours 65 / 975 Long-term average 43.8 spills a year (monitored since 2019) High-spill reason (company) Not Applicable - Ongoing investigation Monitor below 90% Sensor failure / issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 555 hours spilling →	Sth Drain-Trib of Lwr Brue (S)	32	555	down 51%	76%
Hankerton Sewage Pumping Station Storm discharge at pumping station Company site name HANKERTON HANKERTON BRIDGE EA ID / permit WXW00500 · CSSA.2214 Outlet location ST9695490978 (OS grid reference) · View on Apple Maps WFD catchment Swill Brook (source to Ashton Keynes) (GB106039023700) 2024 spills / hours 65 / 1,073 Long-term average 54.5 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 549 hours spilling →	Unnamed Ditch Trib of Braydon	34	549	down 48%	100%
Godmanstone STW Inlet overflow at sewage works Sewage works Godmanstone Company site name GODMANSTONE EA ID / permit WXW00470 · 401521 Outlet location SY6659096430 (OS grid reference) · View on Apple Maps WFD catchment Cerne (GB108044009710) 2024 spills / hours 50 / 900 Long-term average 37.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 545 hours spilling →	River Cerne	24	545	down 52%	94%
Malmesbury WwTW Storm tank at sewage works Sewage works Malmesbury Company site name MALMESBURY STORM TANK EA ID / permit WXW00677 · 102361 Outlet location ST9432386909 (OS grid reference) · View on Apple Maps WFD catchment Avon (Brist) conf Tetbury Avon to conf R Marden (GB109053027650) 2024 spills / hours 80 / 983 Long-term average 63.8 spills a year (monitored since 2020) 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 544 hours spilling →	River Avon	47	544	down 41%	100%
Sparkford WRC Inlet overflow at sewage works Sewage works Sparkford Company site name SPARKFORD OFF SPARKFORD HILL LANE INLET EA ID / permit WXW01025 · 072344 Outlet location ST6050525063 (OS grid reference) · View on Apple Maps WFD catchment Cam - Lower (GB108052015650) 2024 spills / hours 156 / 1,489 Long-term average 99.7 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 540 hours spilling →	The River Cam	74	540	down 53%	100%
North Street PS Storm discharge at pumping station Company site name CHARMINSTER NORTH STREET EA ID / permit WXW00810 · 402447 Outlet location SY6665092620 (OS grid reference) · View on Apple Maps WFD catchment Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691) 2024 spills / hours 88 / 1,396 Long-term average 62.5 spills a year (monitored since 2024) 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 539 hours spilling →	The River Frome	37	539	down 58%	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.