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
Kimcote Sewage Treatment Works Storm tank at sewage works (with treatment) Sewage works Kimcote Company site name KIMCOTE STW (SSTO) EA ID / permit SVT01265 · S/10/26413/R Outlet location SP5837585775 (OS grid reference) · View on Apple Maps WFD catchment Swift source to conf Avon (GB109054043940) Treatment Reed bed 2024 spills / hours 72 / 656 Long-term average 107.8 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 123 hours spilling →	River Swift	14	123	down 81%	99%
Quarry Lane Pumping Station Storm discharge at pumping station Company site name CLEEVE PRIOR - QUARRY LANE (SSO) EA ID / permit SVT01836 · S/16/26188/O Outlet location SP0844048910 (OS grid reference) · View on Apple Maps WFD catchment Littleton Bk - source to conf Bretforton Bk (GB109054039430) 2024 spills / hours 17 / 165 Long-term average 10.6 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 122 hours spilling →	Tributary of Littleton Brook	11	122	down 35%	94%
Sneinton Dale/Watson St CSO Overflow on sewer network Company site name SNEINTON - SNEINTON DALE/WATSON AV (CSO) EA ID / permit SVT02081 · T/64/21891/O Outlet location SK5907038770 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 82 / 187 Long-term average 78.9 spills a year (monitored since 2017) 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 122 hours spilling →	River Trent via Beckvalley Cul	73	122	down 11%	100%
Bulkington STW Storm tank at sewage works Sewage works Bulkington Company site name BULKINGTON STW (SSTO) EA ID / permit SVT00404 · T/19/35774/R Outlet location SP3822086465 (OS grid reference) · View on Apple Maps WFD catchment Wem Brook from Source to River Anker (GB104028042430) 2024 spills / hours 72 / 749 Long-term average 64.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 122 hours spilling →	Wem Brook	18	122	down 75%	100%
Newquay Av/Churchfield Lane Jct CSO Overflow on sewer network Company site name RADFORD - NEWQUAY AVENUE (CSO) EA ID / permit SVT01641 · T/64/21887/O Outlet location SK5498641082 (OS grid reference) · View on Apple Maps WFD catchment Leen from Day Brook to Trent (GB104028053250) 2024 spills / hours 63 / 158 Long-term average 67.0 spills a year (monitored since 2020) 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 122 hours spilling →	River Leen	58	122	down 8%	99%
Halloughton Rd - West Gate CSO Overflow on sewer network Company site name SOUTHWELL - HALLOUGHTON ROAD (CSO) EA ID / permit SVT01027 · T/64/45273/O Outlet location SK6948653475 (OS grid reference) · View on Apple Maps WFD catchment Greet Catchment (trib of Trent) (GB104028053410) 2024 spills / hours 71 / 280 Long-term average 43.7 spills a year (monitored since 2019) 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 121 hours spilling →	Potwell Dyke	36	121	down 49%	100%
Tibshelf - Chesterfield Road SPS Storm discharge at pumping station Company site name TIBSHELF - CHESTERFIELD ROAD (SSO) EA ID / permit SVT02316 · T/41/03048/O Outlet location SK4428961644 (OS grid reference) · View on Apple Maps WFD catchment Westwood Brook Catchment (trib of Alfreton Brook) (GB104028052360) 2024 spills / hours 36 / 218 Long-term average 31.8 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 121 hours spilling →	Tributary of Westwood Brook	27	121	down 25%	99%
Tetheringrass Lane Pumping Station Storm discharge at pumping station Company site name BECKINGHAM - TETHERING GRASS LANE (SSO) EA ID / permit SVT02280 · T/69/40259/O Outlet location SK7808090850 (OS grid reference) · View on Apple Maps WFD catchment Trent from Carlton-on-Trent to Laughton Drain (GB104028058480) 2024 spills / hours 20 / 134 Long-term average 24.3 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 121 hours spilling →	Tetheringrass Drain	19	121	down 5%	99%
Mill House Pumping Station Storm discharge at pumping station Company site name NEWBOLD-ON-STOUR - MILL LANE (CSO) EA ID / permit SVT01562 · S/14/09258/O Outlet location SP2520946201 (OS grid reference) · View on Apple Maps WFD catchment Stour - conf Back Bk to conf R Avon (GB109054039921) 2024 spills / hours 76 / 828 Long-term average 32.9 spills a year (monitored since 2019) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 119 hours spilling →	River Stour (Avon)	17	119	down 78%	100%
Crankley Point STW Storm tank at sewage works Sewage works Crankley Point Company site name CRANKLEY POINT STW (SSTO) EA ID / permit SVT00672 · T/68/45770/R Outlet location SK8007955785 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 57 / 716 Long-term average 31.3 spills a year (monitored since 2022) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 118 hours spilling →	River Trent	8	118	down 86%	100%
Hungarton STW Storm tank at sewage works (with treatment) Sewage works Hungarton Company site name SETTLED STORM OVERFLOW-3PG HUNGARTON (STW) EA ID / permit SVT01194 · T/55/45462/R Outlet location SK6872006996 (OS grid reference) · View on Apple Maps WFD catchment Syston Brook Catchment (trib of Wreake) (GB104028047440) Treatment Reed bed 2024 spills / hours 51 / 254 Long-term average 55.7 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 118 hours spilling →	Tributary of Barkby Brook	28	118	down 45%	100%
Littlewood Sewage Pumping Station Storm discharge at pumping station Company site name CHESLYN HAY - LITTLEWOOD (SSO) EA ID / permit SVT01385 · T/03/20196/O Outlet location SJ9803708089 (OS grid reference) · View on Apple Maps WFD catchment Saredon Brook from Source to River Penk (GB104028046740) 2024 spills / hours 41 / 365 Long-term average 28.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 118 hours spilling →	Wyrley Brook	15	118	down 63%	100%
Defford Road SPS Storm discharge at pumping station Company site name PERSHORE - DEFFORD ROAD (CSO) EA ID / permit SVT00745 · S/17/25722/O Outlet location SO9437045110 (OS grid reference) · View on Apple Maps WFD catchment Avon conf Workman Br, Evesham to conf R Severn (GB109054044403) 2024 spills / hours 52 / 134 Long-term average 25.7 spills a year (monitored since 2019) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 118 hours spilling →	River Avon	34	118	down 35%	100%
Westover Road CSO Overflow on sewer network Company site name BRAUNSTONE - WESTOVER ROAD (CSO) EA ID / permit SVT02526 · T/52/00990/O Outlet location SK5498102735 (OS grid reference) · View on Apple Maps WFD catchment Lubbesthorpe Brook Catchment (trib of Soar) (GB104028046920) 2024 spills / hours 60 / 236 Long-term average 49.0 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 118 hours spilling →	River Biam	41	118	down 32%	99%
Highley Sewage Treatment Works Storm tank at sewage works Sewage works Highley Company site name HIGHLEY STW (SSTO) EA ID / permit SVT01132 · S/02/56099/R Outlet location SO7400082602 (OS grid reference) · View on Apple Maps WFD catchment Borle Bk - source to conf R Severn (GB109054044820) 2024 spills / hours 54 / 328 Long-term average 47.5 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 117 hours spilling →	Trib of Borle Brook	24	117	down 56%	100%
Wychbold STW Storm tank at sewage works Sewage works Wychbold Company site name WYCHBOLD STW (SSTO) EA ID / permit SVT02643 · S/07/56286/R Outlet location SO9158465794 (OS grid reference) · View on Apple Maps WFD catchment Salwarpe - source to conf Elmbridge Bk (GB109054044200) 2024 spills / hours 50 / 536 Long-term average 36.0 spills a year (monitored since 2021) Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 117 hours spilling →	River Salwarpe	12	117	down 76%	99%
Coleshill - 54 Old Mill Road CSO Overflow on sewer network Company site name COLESHILL - OLD MILL ROAD 54 (CSO) EA ID / permit SVT00611 · T/12/36069/O Outlet location SP1977489545 (OS grid reference) · View on Apple Maps WFD catchment Cole from Hatchford-Kingshurst Brook to R Blythe (GB104028042420) 2024 spills / hours 31 / 185 Long-term average 22.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 117 hours spilling →	River Cole	23	117	down 26%	100%
Marehay TPS (CSO) Storm discharge at pumping station EA ID / permit SVT02724 · EPR/LB3643KD Outlet location SK3981148197 (OS grid reference) · View on Apple Maps WFD catchment Bottle Brook Catchment (trib of Derwent) (GB104028052300) 2024 spills / hours – / – Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 116 hours spilling →	Tributary of Bottle Brook	22	116		99%
Silverdale Sewage Pumping Station Storm discharge at pumping station Company site name SILVERDALE - SILVERDALE ROAD (SSO) EA ID / permit SVT02050 · T/01/30327/O Outlet location SJ8317046340 (OS grid reference) · View on Apple Maps WFD catchment Lyme Brook Catchment (trib of Trent) (GB104028053340) 2024 spills / hours 14 / 51 Long-term average 35.8 spills a year (monitored since 2020) 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 116 hours spilling →	Trib of Lyme Brook	52	116	up 271%	91%
Wem Aston Road STW Storm tank at sewage works Sewage works Wem Aston Road Company site name WEM - ASTON ROAD STW (SSTO) EA ID / permit SVT02498 · S/04/55285/R Outlet location SJ5180728592 (OS grid reference) · View on Apple Maps WFD catchment Roden - conf Sleap Bk to conf R Tern (GB109054049190) 2024 spills / hours 131 / 1,899 Long-term average 79.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 116 hours spilling →	River Roden	13	116	down 90%	100%
Scunthorpe - Scotter / Moorwell Rd (CSO) Overflow on sewer network Company site name SCUNTHORPE - SCOTTER/MOORWELL RD (CSO) EA ID / permit SVT01967 · Permit application submitted Outlet location SE8753606881 (OS grid reference) · View on Apple Maps WFD catchment Bottesford Beck Catchment (trib of Trent) (GB104028064290) 2024 spills / hours 25 / 98 Long-term average 24.4 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 115 hours spilling →	Tributary of Bottesford Beck	40	115	up 60%	97%
Rous Lench Sewage Treatment Works Inlet overflow at sewage works Sewage works Rous Lench Company site name ROUS LENCH (STW) EA ID / permit SVT01912 · S/17/25849/R Outlet location SP0097753924 (OS grid reference) · View on Apple Maps WFD catchment Whitsunn Bk - source to conf Piddle Bk (GB109054039530) 2024 spills / hours 61 / 416 Long-term average 37.0 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 completed Volume & pollution Estimate from 115 hours spilling →	Tributary of Whitson Brook	31	115	down 49%	100%
Woolsthorpe Sewage Treatment Works Inlet overflow at sewage works (with treatment) Sewage works Woolsthorpe Company site name WOOLSTHORPE STW (SSTO) EA ID / permit SVT02626 · T/65/45569/R Outlet location SK8364034530 (OS grid reference) · View on Apple Maps WFD catchment Devon from Source to Smite (GB104028052490) Treatment Reed bed 2024 spills / hours 21 / 120 Long-term average 24.0 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 115 hours spilling →	River Devon	15	115	down 29%	95%
Tollerton - Lothian Road SPS Storm discharge at pumping station Company site name TOLLERTON - LOTHIAN ROAD (SSO) EA ID / permit SVT02333 · T/64/40321/O Outlet location SK6012034622 (OS grid reference) · View on Apple Maps WFD catchment Polser Brook from Cotgrave Brook to Trent (GB104028053230) 2024 spills / hours 41 / 232 Long-term average 58.0 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 115 hours spilling →	Tributary of River Trent	25	115	down 39%	100%
Watling Street CSO Overflow on sewer network Company site name LEINTWARDINE - WATLING STREET (B) (CSO) EA ID / permit SVT02473 · S/09/21088/O Outlet location SO4058773759 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Clun to conf R Onny (GB109054044500) 2024 spills / hours 22 / 91 Long-term average 14.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 115 hours spilling →	River Teme	24	115	up 9%	97%
Tutbury Sewage Pumping Station Storm discharge at pumping station Company site name TUTBURY - BRIDGE STREET PS (CSO) EA ID / permit SVT02353 · T/33/35095/O Outlet location SK2170029300 (OS grid reference) · View on Apple Maps WFD catchment Dove - R Churnet to R Trent (GB104028052420) 2024 spills / hours 35 / 238 Long-term average 28.3 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 114 hours spilling →	River Dove	23	114	down 34%	100%
Skegby Sewage Treatment Works Inlet overflow at sewage works Sewage works Skegby Company site name SKEGBY STW (CSO) EA ID / permit SVT02058 · T/71/45942/R Outlet location SK4969461467 (OS grid reference) · View on Apple Maps WFD catchment Meden from Source to Sookholme Brook (GB104028058020) 2024 spills / hours 62 / 208 Long-term average 74.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation completed Improvement UWWTR improvement completed Volume & pollution Estimate from 114 hours spilling →	Skegby Brook	38	114	down 39%	99%
Mill Lane SPS Storm discharge at pumping station Company site name KINVER - MILL LANE (CSO) EA ID / permit SVT01567 · S/06/07934/O Outlet location SO8490283247 (OS grid reference) · View on Apple Maps WFD catchment Stour (Worcs) - conf Smestow Bk to conf R Severn (GB109054044710) 2024 spills / hours 95 / 293 Long-term average 73.7 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 114 hours spilling →	River Stour	73	114	down 23%	100%
Polesworth Sewage Treatment Works Inlet overflow at sewage works Sewage works Polesworth Company site name POLESWORTH STW (SSTO) EA ID / permit SVT01807 · T/21/35970/R Outlet location SK2695102470 (OS grid reference) · View on Apple Maps WFD catchment Anker from River Sence to River Tame (GB104028046460) 2024 spills / hours 39 / 445 Long-term average 23.6 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 113 hours spilling →	River Anker	10	113	down 74%	100%
Weston Lane Morda CSO Overflow on sewer network Company site name MORDA - WESTON ROAD (CSO) EA ID / permit SVT02521 · S/01/22537/O Outlet location SJ2943727787 (OS grid reference) · View on Apple Maps WFD catchment Morda - source to conf unnamed trib (GB109054055070) 2024 spills / hours 24 / 196 Long-term average 11.7 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 113 hours spilling →	River Morda	13	113	down 46%	98%
Attwoolls Sewage Pumping Station Storm discharge at pumping station Company site name WHITMINSTER - ATTWOOLS (CSO) EA ID / permit SVT00146 · S/20/25534/O Outlet location SO7792008490 (OS grid reference) · View on Apple Maps WFD catchment Epney Rhyne - source to conf R Severn Estuary (GB109054032600) 2024 spills / hours 31 / 275 Long-term average 26.7 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 113 hours spilling →	Trib of River Severn	18	113	down 42%	100%
Norton Canes Sewage Pumping Station Storm discharge at pumping station Company site name NORTON CANES - BETTYS LANE (SSO) EA ID / permit SVT01676 · T/03/35596/O Outlet location SK0216207415 (OS grid reference) · View on Apple Maps WFD catchment Saredon Brook from Source to River Penk (GB104028046740) 2024 spills / hours 40 / 208 Long-term average 38.2 spills a year (monitored since 2020) 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 113 hours spilling →	Tributary of Gains Brook	31	113	down 23%	100%
Toddington Sewage Treatment Works Inlet overflow at sewage works Sewage works Toddington Company site name TODDINGTON STW (CSO) EA ID / permit SVT02330 · S/18/25752/R Outlet location SP0336133580 (OS grid reference) · View on Apple Maps WFD catchment Isbourne - source to conf R Avon (GB109054039631) 2024 spills / hours 74 / 478 Long-term average 49.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 113 hours spilling →	River Isbourne	18	113	down 76%	100%
CSO at Site of Allestree Wrw Overflow on sewer network Company site name ALLESTREE - SITE OF ALLESTREE WRW (CSO) EA ID / permit SVT00733 · EPRSB3854GX Outlet location SK3551039200 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Bottle Brook to Trent (GB104028053240) 2024 spills / hours 49 / 176 Long-term average 34.5 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 113 hours spilling →	River Derwent	41	113	down 16%	100%
The Green CSO Overflow on sewer network Company site name HATHERN - THE GREEN FIELD 4604 (CSO) EA ID / permit SVT02288 · T/57/21093/O Outlet location SK5039922596 (OS grid reference) · View on Apple Maps WFD catchment Soar from Rothley Brook to Long Whatton Brook (GB104028047211) 2024 spills / hours 8 / 28 Long-term average 17.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 113 hours spilling →	Trib of River Soar	11	113	up 38%	100%
Dale Abbey Sewage Pumping Station Storm discharge at pumping station Company site name DALE ABBEY (SSO) EA ID / permit SVT00718 · T/61/45975/O Outlet location SK4385938667 (OS grid reference) · View on Apple Maps WFD catchment Nut Brook Catchment (trib of Erewash) (GB104028052520) 2024 spills / hours 46 / 310 Long-term average 34.4 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 112 hours spilling →	Sow Brook	38	112	down 17%	100%
Nether Langwith STW Storm tank at sewage works Sewage works Nether Langwith Company site name NETHER LANGWITH STW (SSTO) EA ID / permit SVT01611 · T/73/45847/R Outlet location SK5448070251 (OS grid reference) · View on Apple Maps WFD catchment Poulter from Source to Millwood Brook (GB104028058130) 2024 spills / hours 25 / 129 Long-term average 52.0 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 111 hours spilling →	River Poulter	15	111	down 40%	100%
Snitterton - Snitterton Road (SSO) Storm discharge at pumping station EA ID / permit SVT01711 · T/40/01181/O Outlet location SK2813360878 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Wye to Amber (GB104028052390) 2024 spills / hours 54 / 268 Long-term average 131.1 spills a year (monitored since 2017) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	River Derwent	21	110	down 61%	100%
Gravelly Hill Walker Drive (B) CSO Overflow on sewer network Company site name GRAVELLY HILL - OFF WALKER DR B (SO) EA ID / permit SVT00986 · TSC2055 Outlet location SP1020489756 (OS grid reference) · View on Apple Maps WFD catchment Tame - conf two arms to R Rea (GB104028046842) 2024 spills / hours 48 / 218 Long-term average 17.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	River Tame	26	110	down 46%	100%
Seagrave Sewerage CSO Overflow on sewer network Company site name SEAGRAVE - BUTCHERS LANE (CSO) EA ID / permit SVT01973 · T/57/01152/O Outlet location SK6222817261 (OS grid reference) · View on Apple Maps WFD catchment Soar from Rothley Brook to Long Whatton Brook (GB104028047211) 2024 spills / hours 15 / 84 Long-term average 51.1 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 110 hours spilling →	River Soar	57	110	up 280%	98%
Somercotes - Lower Birchwood SPS Storm discharge at pumping station Company site name SOMERCOTES - LOWER BIRCHWOOD (SSO) EA ID / permit SVT02096 · T/61/40153/O Outlet location SK4374954052 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Source to Nethergreen Brook (GB104028052740) 2024 spills / hours 23 / 194 Long-term average 26.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	Tributary of River Erewash	20	110	down 13%	100%
Balsall Common WwTW Storm tank at sewage works Sewage works Balsall Common Company site name BALSALL COMMON STW SSTO SPILL 2 (SSTO) EA ID / permit SVT00165 · T/11/35953/R Outlet location SP2223877770 (OS grid reference) · View on Apple Maps WFD catchment Blythe from Temple Balsall Brook to Patrick Bridge (GB104028042571) 2024 spills / hours 101 / 1,389 Long-term average 84.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 110 hours spilling →	Tributary of River Blythe	27	110	down 73%	99%
Shelsley Beauchamp STW Inlet overflow at sewage works Sewage works Shelsley Beauchamp Company site name SHELSLEY BEAUCHAMP STW (CSO) EA ID / permit SVT01998 · S/09/56086/R Outlet location SO7334262328 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Onny to conf R Severn (GB109054044510) 2024 spills / hours 74 / 474 Long-term average 97.8 spills a year (monitored since 2020) 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 109 hours spilling →	River Teme	46	109	down 38%	100%
Wanlip Sewage Treatment Works Inlet overflow at sewage works Sewage works Wanlip Company site name WANLIP IPS (CSO&EO) EA ID / permit SVT02442 · T/53/46354/R Outlet location SK5987011820 (OS grid reference) · View on Apple Maps WFD catchment Soar from Sence to Rothley Brook (GB104028047030) 2024 spills / hours 60 / 296 Long-term average 36.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 109 hours spilling →	River Soar	25	109	down 58%	100%
Pirehill Sewage Treatment Works Storm tank at sewage works Sewage works Pirehill Company site name PIREHILL (STW) EA ID / permit SVT01798 · T/01/35916/R Outlet location SJ9072032740 (OS grid reference) · View on Apple Maps WFD catchment Trent from Tittensor to River Sow (GB104028053272) 2024 spills / hours 99 / 1,213 Long-term average 72.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement completed Volume & pollution Estimate from 108 hours spilling →	River Trent	23	108	down 77%	100%
Hammercliffe Rd-Ulverscroft Rd CSO Overflow on sewer network Company site name LEICESTER - EASTERN MAIN RELIEF SEWER (SSO) EA ID / permit SVT01029 · T/53/00442/O Outlet location SK6001205404 (OS grid reference) · View on Apple Maps WFD catchment Willow Brook Catchment (trib of Soar) (GB104028046980) 2024 spills / hours 36 / 106 Long-term average 44.0 spills a year (monitored since 2020) High-spill reason (company) Data collection - EDM non-representative location Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 108 hours spilling →	Willow Brook	39	108	up 8%	100%
Church Lane Pumping Station Storm discharge at pumping station Company site name THORPE (CSO) EA ID / permit SVT00545 · T/29/30278/O Outlet location SK1570050030 (OS grid reference) · View on Apple Maps WFD catchment Dove - conf R Manifold to conf R Churnet (GB104028052670) 2024 spills / hours 12 / 85 Long-term average 55.2 spills a year (monitored since 2020) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - May Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 108 hours spilling →	Thorpe Brook (River Dove)	19	108	up 58%	88%
Stoke Bardolph STW Storm tank at sewage works Sewage works Stoke Bardolph Company site name STOKE BARDOLPH STW (SSTO) EA ID / permit SVT01684 · T/64/45170/R Outlet location SK6473742212 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 25 / 183 Long-term average 10.7 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 107 hours spilling →	River Trent	14	107	down 44%	100%
Swithland - Main Street (CSO) Storm discharge at pumping station EA ID / permit SVT02267 · Permit application submitted Outlet location SK5563213013 (OS grid reference) · View on Apple Maps WFD catchment Quorn Brook Catchment (trib of Soar) (GB104028047060) 2024 spills / hours 51 / 308 Long-term average 43.0 spills a year (monitored since 2023) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 107 hours spilling →	Tributary of Swithland Reservoir	31	107	down 39%	100%
Moira Road Sewage Pumping Station Storm discharge at pumping station Company site name OVERSEAL - MOIRA ROAD (SSO) EA ID / permit SVT01579 · T/23/12322/O Outlet location SK3032015470 (OS grid reference) · View on Apple Maps WFD catchment Hooborough Brook from Source to River Mease (GB104028046580) 2024 spills / hours 33 / 110 Long-term average 26.0 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 107 hours spilling →	Hooborough Brook	34	107	up 3%	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.