Storm overflow register · 2025 annual return

Severn Trent Water storm overflows, 2025

Severn Trent Water reported 2,452 storm overflows in England for 2025. Together they recorded 36,471 spills over 200,361 hours, an average of 14.9 spills per overflow against 20.4 across England. That ranks 2 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 41% on 2024.

429 overflows did not spill · 72 spilled more than 60 times · 2,342 had monitors working for 90% of the year or more · 435 sewage treatment works with overflows

Hours spilling by month, 2025

Hours spilling, all Severn Trent Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Severn Trent 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
Leicester - Northgate/Sanvey Gate (CSO) Overflow on sewer network EA ID / permit SVT01670 · Permit application submitted Outlet location SK5811005150 (OS grid reference) · View on Apple Maps WFD catchment Soar from Sence to Rothley Brook (GB104028047030) 2024 spills / hours 52 / 441 Long-term average 45.0 spills a year (monitored since 2023) High-spill reason (company) Data collection - EDM non-representative location Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 174 hours spilling →	Grand Union Canal	49	174	down 6%	98%
Barlestone STW Storm tank at sewage works Sewage works Barlestone Company site name BARLESTONE STW (SSTO) EA ID / permit SVT00178 · T/20/35726/R Outlet location SK4267505119 (OS grid reference) · View on Apple Maps WFD catchment Carlton Brook from Source to River Sence (GB104028046690) 2024 spills / hours 75 / 519 Long-term average 55.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 173 hours spilling →	Osbaston Brook	35	173	down 53%	100%
Haddon Road Ppg Stn - Stm/Emeg O.F Storm discharge at pumping station Company site name BAKEWELL - HADDON ROAD TPS (CSO) EA ID / permit SVT01023 · T/38/02091/O Outlet location SK2233567749 (OS grid reference) · View on Apple Maps WFD catchment Wye from Monk's Dale to Derwent (GB104028057820) 2024 spills / hours 88 / 1,169 Long-term average 80.3 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 173 hours spilling →	River Wye	47	173	down 47%	99%
Dock Meadow CSO Overflow on sewer network Company site name BILSTON - VULCAN ROAD (THE LUNT) (CSO) EA ID / permit SVT00775 · EPRHB3896EB Outlet location SO9340095500 (OS grid reference) · View on Apple Maps WFD catchment Tame (W/ton Arm) source to conf Oldbury (GB104028046930) 2024 spills / hours 46 / 92 Long-term average 33.7 spills a year (monitored since 2019) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 173 hours spilling →	Bilston/Darlaston Brook	59	173	up 28%	98%
Retford Sewage Treatment Works Storm tank at sewage works Sewage works Retford Company site name RETFORD STW (SSTO) EA ID / permit SVT01885 · T/74/46203/R Outlet location SK6976483017 (OS grid reference) · View on Apple Maps WFD catchment Idle from Maun/Poulter to Tiln (GB104028058091) 2024 spills / hours 31 / 321 Long-term average 27.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 172 hours spilling →	River Idle	21	172	down 32%	100%
Loggerheads Village STW Storm tank at sewage works Sewage works Loggerheads Village Company site name LOGGERHEADS VILLAGE (STW) EA ID / permit SVT01395 · S/04/55884/R Outlet location SJ7347036145 (OS grid reference) · View on Apple Maps WFD catchment Loggerheads Bk - source to conf R Tern (GB109054055130) 2024 spills / hours 23 / 227 Long-term average 18.6 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 172 hours spilling →	Loggerheads Brook	22	172	down 4%	100%
Ambergate Pumping Station Storm discharge at pumping station Company site name AMBERGATE - RIPLEY ROAD PS (CSO) EA ID / permit SVT00073 · T/41/40326/O Outlet location SK3494051760 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 23 / 143 Long-term average 25.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 171 hours spilling →	River Amber	23	171	no change	100%
Mortimer Wilson CSO Overflow on sewer network Company site name ALFRETON - TRENT GROVE 11 (CSO) EA ID / permit SVT01589 · T/41/45490/O Outlet location SK4111054960 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 43 / 174 Long-term average 46.9 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 171 hours spilling →	Oakerthorpe Brook	41	171	down 5%	100%
Flintham Sewage Treatment Works Inlet overflow at sewage works (with treatment) Sewage works Flintham Company site name FLINTHAM STW IPS (CSO&EO) EA ID / permit SVT00911 · T/67/45832/R Outlet location SK7422046450 (OS grid reference) · View on Apple Maps WFD catchment Car Dyke (GB104028052501) Treatment Reed bed 2024 spills / hours 42 / 413 Long-term average 33.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 171 hours spilling →	Trib of Car Dyke	25	171	down 40%	99%
Napton Sewage Treatment Works Storm tank at sewage works (with treatment) Sewage works Napton Company site name NAPTON STW (SSTO) EA ID / permit SVT01599 · S/12/25765/R Outlet location SP4589060750 (OS grid reference) · View on Apple Maps WFD catchment Stowe - source to conf R Itchen (GB109054044090) Treatment Reed bed 2024 spills / hours 60 / 508 Long-term average 93.2 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 168 hours spilling →	Tributary of River Stowe	26	168	down 57%	100%
Ravenstone Sewage Treatment Works Storm tank at sewage works Sewage works Ravenstone Company site name RAVENSTONE STW (SSTO) EA ID / permit SVT01869 · T/20/35618/R Outlet location SK3955213136 (OS grid reference) · View on Apple Maps WFD catchment Sence from Source to Ibstock Brook (GB104028046750) 2024 spills / hours 104 / 654 Long-term average 89.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 168 hours spilling →	Tributary of Blower'S Brook	34	168	down 67%	100%
Ilkeston - Potters Lock (SSO) Storm discharge at pumping station EA ID / permit SVT01819 · T/61/12364/O Outlet location SK4768041680 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Gilt Brook to Trent (GB104028052480) 2024 spills / hours 26 / 221 Long-term average 28.0 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 168 hours spilling →	River Erewash	19	168	down 27%	100%
Hanging Bridge No.1 SPS Storm discharge at pumping station Company site name CLIFTON - VILLAGE PS (CSO) EA ID / permit SVT00853 · EPRYB3092NL Outlet location SK1617745129 (OS grid reference) · View on Apple Maps WFD catchment Dove - conf R Manifold to conf R Churnet (GB104028052670) 2024 spills / hours 36 / 349 Long-term average 30.0 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 167 hours spilling →	Tributary of Henmore Brook	27	167	down 25%	100%
Powick STW Storm tank at sewage works Sewage works Powick Company site name POWICK STW (SSTO) EA ID / permit SVT01820 · S/08/25693/R Outlet location SO8393050933 (OS grid reference) · View on Apple Maps WFD catchment Careys Bk - source to conf R Severn (GB109054039750) 2024 spills / hours 79 / 904 Long-term average 54.7 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 167 hours spilling →	Careys Brook	18	167	down 77%	100%
Worthen STW Inlet overflow at sewage works Sewage works Worthen Company site name WORTHEN STW (CSO) EA ID / permit SVT02640 · S/02/55952/R Outlet location SJ3291004490 (OS grid reference) · View on Apple Maps WFD catchment Rowley Bk - source to conf Rea Bk (GB109054049580) 2024 spills / hours 11 / 51 Long-term average 5.4 spills a year (monitored since 2021) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 167 hours spilling →	Worthen Brook	11	167	no change	100%
Hartshone - Bugley Hole CSO Overflow on sewer network Company site name HARTSHORNE - BUGLEY HOLE (CSO) EA ID / permit SVT01074 · T/36/40347/O Outlet location SK3103622243 (OS grid reference) · View on Apple Maps WFD catchment Repton Brook Catchment (trib of Trent) (GB104028047390) 2024 spills / hours 15 / 37 Long-term average 17.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 167 hours spilling →	Repton Brook	51	167	up 240%	98%
Orford Street CSO Overflow on sewer network Company site name PORTHILL - ORFORD STREET (CSO) EA ID / permit SVT01729 · T/01/36418/O Outlet location SJ8603449030 (OS grid reference) · View on Apple Maps WFD catchment Fowlea Brook from Source to River Trent (GB104028053360) 2024 spills / hours 62 / 280 Long-term average 45.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 166 hours spilling →	Fowlea Brook	40	166	down 35%	100%
Swanwick Sewage Treatment Works Storm tank at sewage works Sewage works Swanwick Company site name SWANWICK STW (SSTO) EA ID / permit SVT02264 · T/41/45656/R Outlet location SK4022952293 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 11 / 19 Long-term average 28.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 165 hours spilling →	Tributary of Hartshay Brook	41	165	up 273%	100%
Erewash Sq Ilkeston Outlet 3 CSO Storm discharge at pumping station Company site name ILKESTON - EREWASH SQUARE (CSO) EA ID / permit SVT00872 · T/61/45158/O Outlet location SK4787541073 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Gilt Brook to Trent (GB104028052480) 2024 spills / hours 39 / 348 Long-term average 24.4 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 165 hours spilling →	River Erewash	29	165	down 26%	97%
Church Warsop WwTW Storm tank at sewage works Sewage works Church Warsop Company site name CHURCH WARSOP STW (SSTO) EA ID / permit SVT00559 · T/71/45571/R Outlet location SK5830569087 (OS grid reference) · View on Apple Maps WFD catchment Meden from Sookholme Brook to Maun (GB104028058060) 2024 spills / hours 44 / 246 Long-term average 38.4 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 164 hours spilling →	Tributary of River Meden	30	164	down 32%	100%
Rushmoor STW Storm tank at sewage works Sewage works Rushmoor Company site name RUSHMOOR STW (SSTO) EA ID / permit SVT01930 · S/04/55141/R Outlet location SJ6129613532 (OS grid reference) · View on Apple Maps WFD catchment Tern - conf R Meese to conf R Roden (GB109054050170) 2024 spills / hours 57 / 683 Long-term average 29.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 164 hours spilling →	River Tern	18	164	down 68%	99%
Hazelwood - Nether Lane SPS Storm discharge at pumping station Company site name HAZELWOOD - NETHER LANE (SSO) EA ID / permit SVT01097 · T/43/02012/O Outlet location SK3202544645 (OS grid reference) · View on Apple Maps WFD catchment Ecclesborne Catchment (trib of Derwent) (GB104028052720) 2024 spills / hours 22 / 179 Long-term average 18.2 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 164 hours spilling →	Trib. of River Ecclesbourne	22	164	no change	100%
Long Itchington SPS Storm discharge at pumping station Company site name LONG ITCHINGTON - STONEBRIDGE LANE (CSO) EA ID / permit SVT01400 · S/12/25044/O Outlet location SP4063065000 (OS grid reference) · View on Apple Maps WFD catchment Itchen - conf R Stowe to conf R Leam (GB109054044110) 2024 spills / hours 54 / 855 Long-term average 21.6 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 164 hours spilling →	River Itchen	12	164	down 78%	100%
South Normanton - Carnfield SPS Storm discharge at pumping station Company site name SOUTH NORMANTON - CARNFIELD (SSO) EA ID / permit SVT02106 · T/41/40185/O Outlet location SK4330256478 (OS grid reference) · View on Apple Maps WFD catchment Alfreton Brook from Westwood Brook to Amber (GB104028052320) 2024 spills / hours 4 / 21 Long-term average 5.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 164 hours spilling →	Tributary of Alfreton Brook	25	164	up 525%	100%
Walkeringham STW Storm tank at sewage works Sewage works Walkeringham Company site name WALKERINGHAM STW (SSTO) EA ID / permit SVT02425 · T/69/45814/R Outlet location SK7861193046 (OS grid reference) · View on Apple Maps WFD catchment Trent from Carlton-on-Trent to Laughton Drain (GB104028058480) 2024 spills / hours 27 / 211 Long-term average 22.0 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 163 hours spilling →	River Trent	18	163	down 33%	99%
Bridgnorth Slads STW Storm tank at sewage works Sewage works Bridgnorth Slads Company site name BRIDGNORTH - SLADS STW (SSTO) EA ID / permit SVT00349 · S/02/56079/R Outlet location SO7350591058 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf R Worfe to conf R Stour (GB109054049145) 2024 spills / hours 71 / 594 Long-term average 65.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 162 hours spilling →	River Severn	30	162	down 58%	100%
East Bridgford STW Storm tank at sewage works Sewage works East Bridgford Company site name EAST BRIDGFORD STW (SSTO) EA ID / permit SVT00818 · EPRQB3699WX Outlet location SK6841843616 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 54 / 262 Long-term average 89.0 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Feb Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 162 hours spilling →	River Trent	39	162	down 28%	88%
Weddington - Weddington Road SPS Storm discharge at pumping station Company site name WEDDINGTON - WEDDINGTON ROAD (SSO) EA ID / permit SVT02477 · T/19/02830/O Outlet location SP3634392821 (OS grid reference) · View on Apple Maps WFD catchment Anker from Wem Brook to River Sence (GB104028046430) 2024 spills / hours 50 / 425 Long-term average 31.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 162 hours spilling →	River Anker	30	162	down 40%	100%
Malvern Sewage Treatment Works Inlet overflow at sewage works Sewage works Malvern Company site name MALVERN STW INLET WORKS 6 DWF (CSO) EA ID / permit SVT00181 · S/08/26522/R Outlet location SO8366045370 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf R Teme to conf R Avon (GB109054039760) 2024 spills / hours 71 / 376 Long-term average 45.2 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 162 hours spilling →	River Severn	33	162	down 54%	100%
Nuneaton - St Marys Road O/F 2 (CSO) Storm tank at sewage works Sewage works Nuneaton St Marys Road O F EA ID / permit SVT01694 · T/19/08001/O Outlet location SP3624392286 (OS grid reference) · View on Apple Maps WFD catchment Anker from Wem Brook to River Sence (GB104028046430) 2024 spills / hours 26 / 174 Long-term average 27.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 162 hours spilling →	River Anker	28	162	up 8%	98%
Sandiacre - Mark Street (SO) Overflow on sewer network EA ID / permit SVT02680 · Unpermitted Outlet location SK4831436037 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Gilt Brook to Trent (GB104028052480) 2024 spills / hours 21 / 138 Long-term average 27.0 spills a year (monitored since 2025) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 162 hours spilling →	River Erewash	27	162	up 29%	100%
Whittington Rd/Miserden Rd Jcn CSO Overflow on sewer network Company site name BENHALL - WHITTINGTON ROAD (CSO) EA ID / permit SVT02546 · S/20/26390/O Outlet location SO9146521822 (OS grid reference) · View on Apple Maps WFD catchment Hatherley Bk - source to conf R Severn (GB109054032801) 2024 spills / hours 10 / 22 Long-term average 10.6 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 162 hours spilling →	Hatherley Brook	17	162	up 70%	98%
Polesworth Bridge Pumping Station Storm discharge at pumping station Company site name POLESWORTH BRIDGE TPS (CSO) EA ID / permit SVT01805 · T/21/00116/O Outlet location SK2606002320 (OS grid reference) · View on Apple Maps WFD catchment Anker from River Sence to River Tame (GB104028046460) 2024 spills / hours 38 / 455 Long-term average 27.3 spills a year (monitored since 2022) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 162 hours spilling →	River Anker	18	162	down 53%	100%
The Oval Sewage Pumping Station Storm discharge at pumping station Company site name BICTON - THE OVAL (SSO) EA ID / permit SVT02299 · S/02/55422/O Outlet location SJ4494915015 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf Bele Bk to conf Sundorne Bk (GB109054049142) 2024 spills / hours 42 / 313 Long-term average 25.5 spills a year (monitored since 2020) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Feb Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 160 hours spilling →	Tributary of River Severn	22	160	down 48%	88%
Clifton - Watery Lane/Green Lane (CSO) Overflow on sewer network EA ID / permit SVT00580 · Permit application submitted Outlet location SK1617945134 (OS grid reference) · View on Apple Maps WFD catchment Dove - conf R Manifold to conf R Churnet (GB104028052670) 2024 spills / hours 32 / 470 Long-term average 24.2 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 160 hours spilling →	Unnamed Ditch Draining to Henmore Brook	15	160	down 53%	100%
Calverton STW Storm tank at sewage works Sewage works Calverton Company site name CALVERTON STW (SSTO) EA ID / permit SVT00457 · T/64/45588/R Outlet location SK6292649052 (OS grid reference) · View on Apple Maps WFD catchment Dover Beck Catchment (trib of Trent) (GB104028053370) 2024 spills / hours 23 / 71 Long-term average 33.2 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 159 hours spilling →	Grimesmoor Dyke	20	159	down 13%	100%
Woodgarr Avenue Storm Overflow Storm discharge at pumping station Company site name KEADBY - WOODGARR AVENUE PS (CSO) EA ID / permit SVT02608 · T/83/21614/O Outlet location SE8326011140 (OS grid reference) · View on Apple Maps WFD catchment Torne/Three Rivers from Mother Drain to Trent (GB104028064340) 2024 spills / hours 44 / 285 Long-term average 27.3 spills a year (monitored since 2022) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 157 hours spilling →	Three Rivers	35	157	down 20%	100%
Dividy Road / Joiners Square CSO Overflow on sewer network Company site name BUCKNALL - DIVIDY ROAD/JOINERS SQ (CSO) EA ID / permit SVT00774 · T/01/35986/O Outlet location SJ8984047240 (OS grid reference) · View on Apple Maps WFD catchment Trent - Ford Green Bk to Fowlea Bk (GB104028053301) 2024 spills / hours 61 / 218 Long-term average 71.7 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 157 hours spilling →	River Trent	44	157	down 28%	100%
Mansfield - Bath Lane STW Storm tank at sewage works Sewage works Mansfield Bath Lane Company site name MANSFIELD - BATH LANE STW (SSTO) EA ID / permit SVT01481 · T/70/46165/R Outlet location SK5483061760 (OS grid reference) · View on Apple Maps WFD catchment Maun from Source to Vicar Water (GB104028052960) 2024 spills / hours 37 / 124 Long-term average 39.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 157 hours spilling →	River Maun	31	157	down 16%	99%
Carsington - B5035 PS (CSO) Storm discharge at pumping station EA ID / permit SVT00485 · Unpermitted Outlet location SK2535853037 (OS grid reference) · View on Apple Maps WFD catchment Henmore Brook Catch (trib of R Dove) (GB104028052700) 2024 spills / hours 64 / 279 Long-term average 34.1 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 156 hours spilling →	Carsington Res	46	156	down 28%	100%
Etwall STW Storm tank at sewage works Sewage works Etwall Company site name ETWALL STW (SSTO) EA ID / permit SVT00878 · T/36/46320/R Outlet location SK2660031310 (OS grid reference) · View on Apple Maps WFD catchment Eggington Brook Catchment (trib of Trent) (GB104028053170) 2024 spills / hours 34 / 239 Long-term average 47.0 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 156 hours spilling →	Etwall Brook	32	156	down 6%	100%
Scunthorpe - 122 East Common Ln CSO Overflow on sewer network Company site name SCUNTHORPE - EAST COMMON LANE 122 (CSO) EA ID / permit SVT01958 · T/81/45036/O Outlet location SE9164409510 (OS grid reference) · View on Apple Maps WFD catchment Bottesford Beck Catchment (trib of Trent) (GB104028064290) 2024 spills / hours 50 / 129 Long-term average 55.8 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement completed Volume & pollution Estimate from 155 hours spilling →	Tributary of Bottesford Beck	56	155	up 12%	100%
Big Normans Pumping Station Storm discharge at pumping station Company site name LONGFORD - BIG NORMANS (CSO) EA ID / permit SVT00264 · S/20/25514/O Outlet location SO8542020610 (OS grid reference) · View on Apple Maps WFD catchment Horsebere Bk - source to conf R Severn (GB109054032760) 2024 spills / hours 11 / 114 Long-term average 10.0 spills a year (monitored since 2023) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 155 hours spilling →	Horsbere Brook	16	155	up 45%	100%
Abbots Bromley Sewage Treatment Wks Storm tank at sewage works Sewage works Abbots Bromley Sewage Treatment Wks Company site name ABBOTS BROMLEY STW (SSTO) EA ID / permit SVT00022 · T/06/35611/R Outlet location SK0789723988 (OS grid reference) · View on Apple Maps WFD catchment Blithe - Tad Bk to R Trent (GB104028046491) 2024 spills / hours 135 / 1,380 Long-term average 95.6 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 151 hours spilling →	Mires Brook	27	151	down 80%	100%
Edgmond Sewage Treatment Works Storm tank at sewage works Sewage works Edgmond Company site name EDGMOND (STW) EA ID / permit SVT00844 · S/04/56016/R Outlet location SJ7043319700 (OS grid reference) · View on Apple Maps WFD catchment Pipe Strine - source to conf R Strine (GB109054050180) 2024 spills / hours 51 / 459 Long-term average 31.6 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 151 hours spilling →	Pipe Strine	23	151	down 55%	98%
Elston Sewage Treatment Works Storm tank at sewage works (with treatment) Sewage works Elston Company site name ELSTON STW (CSO&EO) EA ID / permit SVT00863 · T/67/45596/R Outlet location SK7643547888 (OS grid reference) · View on Apple Maps WFD catchment Car Dyke (GB104028052501) Treatment Reed bed 2024 spills / hours 15 / 157 Long-term average 36.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 151 hours spilling →	Trib of Car Dyke	22	151	up 47%	100%
Diglis Syphon CSO Overflow on sewer network Company site name WORCESTER - DIGLIS AVENUE SYPHON (CSO) EA ID / permit SVT00768 · S/08/55356/O Outlet location SO8487054030 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf R Stour to conf RIver Teme (GB109054049144) 2024 spills / hours 36 / 296 Long-term average 24.9 spills a year (monitored since 2019) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 151 hours spilling →	River Severn	18	151	down 50%	98%
Pant Plas Cerrig STW Storm tank at sewage works Sewage works Pant Plas Cerrig Company site name PANT-PLAS CERRIG (STW) EA ID / permit SVT01754 · S/01/56011/R Outlet location SJ2706520567 (OS grid reference) · View on Apple Maps WFD catchment Morda - conf unnamed trib to conf Afon Vyrn (GB109054049930) 2024 spills / hours 41 / 272 Long-term average 36.0 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 150 hours spilling →	River Vyrnwy	18	150	down 56%	100%
Castle Donington STW Storm tank at sewage works Sewage works Castle Donington Company site name CASTLE DONNINGTON STW (SSTO) EA ID / permit SVT00489 · T/36/45984/R Outlet location SK4384028640 (OS grid reference) · View on Apple Maps WFD catchment Trent from Dove to Derwent (GB104028047420) 2024 spills / hours 44 / 265 Long-term average 33.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 149 hours spilling →	River Trent	29	149	down 34%	99%
Gaulby STW Storm tank at sewage works (with treatment) Sewage works Gaulby Company site name STORM SEWAGE EFFLUENT GAULBY (STW) EA ID / permit SVT00943 · T/51/45532/R Outlet location SK6991900608 (OS grid reference) · View on Apple Maps WFD catchment Burton Brook from Source to Sence (GB104028046630) Treatment Reed bed 2024 spills / hours 82 / 586 Long-term average 91.0 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 149 hours spilling →	Burton Brook	32	149	down 61%	100%

Sewage treatment works

Storm tanks and inlet overflows at each Severn Trent 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.