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
Hoe Hill Pumping Station Storm discharge at pumping station Company site name TOLLERTON - HOE HILL (SSO) EA ID / permit SVT01156 · T/64/40294/O Outlet location SK6198033500 (OS grid reference) · View on Apple Maps WFD catchment Polser Brook from Source to Cotgrave Brook (GB104028053180) 2024 spills / hours 18 / 159 Long-term average 20.2 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 90 hours spilling →	Polser Brook	10	90	down 44%	99%
Cubbington Sewage Pumping Staton Storm discharge at pumping station Company site name CUBBINGTON - OFFCHURCH ROAD (SSO) EA ID / permit SVT00710 · S/12/23084/O Outlet location SP3420367866 (OS grid reference) · View on Apple Maps WFD catchment Leam - conf R Itchen to conf R Avon (GB109054044140) 2024 spills / hours 35 / 190 Long-term average 54.7 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 90 hours spilling →	Pingle Brook	15	90	down 57%	100%
Frolesworth Sewage Treatment Works Inlet overflow at sewage works Sewage works Frolesworth Company site name FROLESWORTH STW INLET (CSO) EA ID / permit SVT00935 · T/50/45550/R Outlet location SP5009990709 (OS grid reference) · View on Apple Maps WFD catchment Soar from Source to Soar Brook (GB104028042580) 2024 spills / hours 68 / 158 Long-term average 36.2 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 90 hours spilling →	Tributary of River Soar	56	90	down 18%	98%
South Wingfield - Holm Lane SPS Inlet overflow at sewage works Sewage works South Wingfield Holm Lane Sps Company site name SOUTH WINGFIELD STW (SO) EA ID / permit SVT02113 · T/41/45538/R Outlet location SK3808455337 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 47 / 157 Long-term average 38.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 90 hours spilling →	River Amber	23	90	down 51%	99%
Swepstone - Main Street SPS Storm discharge at pumping station Company site name SWEPSTONE - MAIN STREET (SSO) EA ID / permit SVT02265 · T/23/01208/O Outlet location SK3703110804 (OS grid reference) · View on Apple Maps WFD catchment Gilwiskaw Brook from Source to River Mease (GB104028046590) 2024 spills / hours 0 / 0.0 Long-term average 1.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 90 hours spilling →	Tributary of Gilwiskaw Brook	5	90	up from 0	100%
Prees - Higher Heath STW Storm tank at sewage works Sewage works Prees Higher Heath Company site name PREES - HIGHER HEATH STW (SSTO) EA ID / permit SVT01821 · S/04/56056/R Outlet location SJ5735135166 (OS grid reference) · View on Apple Maps WFD catchment Bailey Bk - source to conf R Tern (GB109054055140) 2024 spills / hours 22 / 93 Long-term average 23.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement UWWTR improvement ongoing, Operational improvement completed Volume & pollution Estimate from 90 hours spilling →	Trib of Bailey Brook	15	90	down 32%	99%
Brick Kiln Lane CSO Overflow on sewer network Company site name GORNAL WOOD - BRICK KILN LANE (CSO) EA ID / permit SVT00341 · S/06/21303/O Outlet location SO9057991230 (OS grid reference) · View on Apple Maps WFD catchment Bobs-Holbeche Bk - source to conf Smestow Bk (GB109054044830) 2024 spills / hours 47 / 99 Long-term average 48.3 spills a year (monitored since 2020) 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 89 hours spilling →	Tributary of Smestow Brook	52	89	up 11%	100%
Callow End - Lower Ferry Lane (CSO) Overflow on sewer network EA ID / permit SVT01425 · S/08/05700/O Outlet location SO8464749465 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf R Teme to conf R Avon (GB109054039760) 2024 spills / hours 77 / 986 Long-term average 41.0 spills a year (monitored since 2019) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Feb Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 89 hours spilling →	River Severn	23	89	down 70%	88%
Roundhill Wastewater Treatment Wrks Storm tank at sewage works Sewage works Roundhill Wastewater Treatment Wrks Company site name ROUNDHILL STW (SSTO) EA ID / permit SVT01911 · S/06/55232/R Outlet location SO8532782749 (OS grid reference) · View on Apple Maps WFD catchment Stour (Worcs) - conf Smestow Bk to conf R Severn (GB109054044710) 2024 spills / hours 29 / 213 Long-term average 57.8 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 89 hours spilling →	River Stour&Gallows Brook	10	89	down 66%	100%
Burnhill Green (CSO) Inlet overflow at sewage works Sewage works Burnhill Green EA ID / permit SVT00418 · S/05/56082/R Outlet location SJ7815000910 (OS grid reference) · View on Apple Maps WFD catchment Worfe - conf Wesley Bk to conf R Severn (GB109054050260) 2024 spills / hours 53 / 528 Long-term average 11.2 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 89 hours spilling →	Tributary of River Worfe	10	89	down 81%	100%
High Street CSO Overflow on sewer network Company site name LEINTWARDINE - HIGH STREET (A) (CSO) EA ID / permit SVT01125 · S/09/21067/O Outlet location SO4045573830 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Clun to conf R Onny (GB109054044500) 2024 spills / hours 33 / 114 Long-term average 12.1 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 89 hours spilling →	River Teme	41	89	up 24%	100%
Gaddesby Pumping Station Storm discharge at pumping station Company site name GADDESBY - NETHER END (CSO) EA ID / permit SVT00938 · T/55/45578/O Outlet location SK6860012750 (OS grid reference) · View on Apple Maps WFD catchment Queniborough Brook Catchment (trib of Wreake) (GB104028047450) 2024 spills / hours 60 / 477 Long-term average 59.4 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 89 hours spilling →	Gaddesby Brook	32	89	down 47%	100%
Cradley Heath CSO Overflow on sewer network Company site name CRADLEY HEATH - CRADLEY FORGE (CSO) EA ID / permit SVT00669 · S/06/04942/R Outlet location SO9327185591 (OS grid reference) · View on Apple Maps WFD catchment Stour (Worcs) source to conf Smestow Bk (GB109054044750) 2024 spills / hours 22 / 339 Long-term average 26.9 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 89 hours spilling →	River Stour	5	89	down 77%	100%
Maltby STW Storm tank at sewage works Sewage works Maltby Company site name ABBEY LATHE - MALTBY STW (SSTO) EA ID / permit SVT01468 · T/76/45916/R Outlet location SK5385090500 (OS grid reference) · View on Apple Maps WFD catchment Oldcotes Dyke Catchment (trib of Ryton) (GB104028058230) 2024 spills / hours 18 / 149 Long-term average 30.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 89 hours spilling →	Maltby Dyke	16	89	down 11%	100%
Glenfield/Kirby Muxloe PS/Stm/SWS Storm discharge at pumping station Company site name DESFORD - DESFORD CROSS ROAD PS (CSO) EA ID / permit SVT00963 · EPRTB3790RC Outlet location SK5230003500 (OS grid reference) · View on Apple Maps WFD catchment Thurlaston Brook Catchment (trib of Soar) (GB104028046940) 2024 spills / hours 87 / 1,029 Long-term average 56.8 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 89 hours spilling →	Glenfield/Braunstone/K/Mux Br	25	89	down 71%	100%
Kitts Green Road CSO Overflow on sewer network Company site name KITTS GREEN - KITTS GREEN ROAD (CSO) EA ID / permit SVT01298 · T/12/21238/O Outlet location SP1458587584 (OS grid reference) · View on Apple Maps WFD catchment Cole from Springfield to Hatchford-Kingshurst Brook (GB104028042502) 2024 spills / hours 52 / 153 Long-term average 62.9 spills a year (monitored since 2019) 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 88 hours spilling →	Yardley Brook	46	88	down 12%	100%
Crown Street CSO Overflow on sewer network Company site name STONE - CROWN STREET (B) (CSO) EA ID / permit SVT00696 · T/01/30015/O Outlet location SJ9021833686 (OS grid reference) · View on Apple Maps WFD catchment Trent from Tittensor to River Sow (GB104028053272) 2024 spills / hours 59 / 169 Long-term average 38.4 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 88 hours spilling →	Scotch Brook	50	88	down 15%	96%
Kirkby in Ashfield Sewage Treatment Inlet overflow at sewage works Sewage works Kirkby In Ashfield Sewage Treatment Company site name KIRKBY IN ASHFIELD STW 6DWF (CSO) EA ID / permit SVT01294 · T/61/45171/R Outlet location SK4843254866 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Source to Nethergreen Brook (GB104028052740) 2024 spills / hours 33 / 114 Long-term average 30.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 88 hours spilling →	River Erewash	29	88	down 12%	100%
Oswestry Drenewydd STW Storm tank at sewage works Sewage works Oswestry Drenewydd Company site name DRENEWYDD - OSWESTRY (STW) EA ID / permit SVT01735 · S/03/56061/R Outlet location SJ3167630367 (OS grid reference) · View on Apple Maps WFD catchment Common Bk - source to conf R Perry (GB109054054960) 2024 spills / hours 83 / 1,688 Long-term average 23.0 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 88 hours spilling →	Common Brook	7	88	down 92%	100%
Various PS'S & Csos-Stoney Stanton Storm discharge at pumping station Company site name SHARNFORD - THE GREEN (SSO) EA ID / permit SVT02408 · T/50/03632/O Outlet location SP4990094400 (OS grid reference) · View on Apple Maps WFD catchment Soar Brook from Source to Soar (GB104028042590) 2024 spills / hours 15 / 130 Long-term average 13.2 spills a year (monitored since 2021) Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 88 hours spilling →	River Soar Or Tribs	14	88	down 7%	100%
Mickleover - Melbourne Close (CSO) Storm discharge at pumping station EA ID / permit SVT01535 · T/36/01407/O Outlet location SK3181935354 (OS grid reference) · View on Apple Maps WFD catchment Markeaton Brook from Mackworth Brook to Derwent (GB104028052830) 2024 spills / hours 22 / 171 Long-term average 10.4 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 87 hours spilling →	Bramble Brook	10	87	down 55%	95%
Swanington Pumping Station Storm discharge at pumping station Company site name SWANNINGTON - JEFFCOATS LANE (SSO) EA ID / permit SVT02263 · T/57/01188/O Outlet location SK4180017000 (OS grid reference) · View on Apple Maps WFD catchment Long Whatton Brook Catchment (trib of Soar) (GB104028047170) 2024 spills / hours 7 / 48 Long-term average 23.3 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 87 hours spilling →	Westmeadow Brook	12	87	up 71%	100%
Clifford Chambers - the Close (CSO) Storm discharge at pumping station EA ID / permit SVT00579 · Permit application submitted Outlet location SP1969652472 (OS grid reference) · View on Apple Maps WFD catchment Stour - conf Back Bk to conf R Avon (GB109054039921) 2024 spills / hours 28 / 272 Long-term average 11.5 spills a year (monitored since 2022) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 87 hours spilling →	River Stour	10	87	down 64%	100%
Off Stoney Gate Road CSO Overflow on sewer network Company site name SPONDON - STONEY GATE RD (CSO) EA ID / permit SVT02128 · T/48/20201/O Outlet location SK4055234794 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Bottle Brook to Trent (GB104028053240) 2024 spills / hours 31 / 83 Long-term average 44.3 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 ongoing Volume & pollution Estimate from 87 hours spilling →	River Derwent	39	87	up 26%	100%
Stoke Golding Sewage Pumping Stn Storm discharge at pumping station Company site name STOKE GOLDING - CROWN HILL FARM (CSO) EA ID / permit SVT02201 · T/20/03180/O Outlet location SP3949197576 (OS grid reference) · View on Apple Maps WFD catchment Stoke Golding Brook from Source to R Sence (GB104028046640) 2024 spills / hours 33 / 30 Long-term average 32.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 87 hours spilling →	Trib of River Sence	20	87	down 39%	100%
Balderton Sewage Treatment Works Storm tank at sewage works Sewage works Balderton Company site name BALDERTON STW (SSTO) EA ID / permit SVT00162 · T/67/45414/R Outlet location SK7645551228 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 18 / 226 Long-term average 24.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 87 hours spilling →	River Trent	6	87	down 67%	100%
Railway Bridge/Dale Road CSO Overflow on sewer network Company site name MATLOCK - DALE RD (RAILWAY BRIDGE) (CSO) EA ID / permit SVT01858 · DT/2178 Outlet location SK2977259857 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Wye to Amber (GB104028052390) 2024 spills / hours 40 / 19 Long-term average 39.2 spills a year (monitored since 2017) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 87 hours spilling →	River Derwent	23	87	down 43%	99%
Brinsley-Hall Lane(Meadow Lodge)CSO Overflow on sewer network Company site name BRINSLEY - HALL LA (MEADOW LODGE) (CSO) EA ID / permit SVT01523 · T/61/46090/O Outlet location SK4485949638 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Source to Nethergreen Brook (GB104028052740) 2024 spills / hours 22 / 128 Long-term average 21.2 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 86 hours spilling →	River Erewash	15	86	down 32%	100%
Newcastle Road CSO Overflow on sewer network Company site name STONE - NEWCASTLE ROAD (CSO) EA ID / permit SVT01632 · T/01/35277/O Outlet location SJ8961234008 (OS grid reference) · View on Apple Maps WFD catchment Trent from Tittensor to River Sow (GB104028053272) 2024 spills / hours 89 / 288 Long-term average 78.9 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 86 hours spilling →	River Trent	49	86	down 45%	100%
Newbold Verdon STW Storm tank at sewage works Sewage works Newbold Verdon Company site name NEWBOLD VERDON STW (SSTO) EA ID / permit SVT01627 · T/50/45372/R Outlet location SK4413203245 (OS grid reference) · View on Apple Maps WFD catchment Thurlaston Brook Catchment (trib of Soar) (GB104028046940) 2024 spills / hours 53 / 293 Long-term average 31.6 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 86 hours spilling →	Tributary of Thurlaston Brook	19	86	down 64%	100%
Asfordby Combined Sewage Overflow Storm discharge at pumping station Company site name ASFORDBY - RIVERSIDE WALK (CSO) EA ID / permit SVT00112 · T/55/12424/O Outlet location SK7086218819 (OS grid reference) · View on Apple Maps WFD catchment Eye / Wreake from Langham Brook to Soar (GB104028047550) 2024 spills / hours 6 / 41 Long-term average 8.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 86 hours spilling →	River Wreake	16	86	up 167%	98%
Meadows-Turney St& Arkwright St CSO Overflow on sewer network Company site name MEADOWS - TURNEY ST/ARKWRIGHT ST (CSO) EA ID / permit SVT01528 · T/64/22903/O Outlet location SK5812038310 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 26 / 197 Long-term average 20.4 spills a year (monitored since 2017) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 86 hours spilling →	River Trent	15	86	down 42%	100%
Newent Sewage Treatment Works Storm tank at sewage works Sewage works Newent Company site name NEWENT STW (SSTO) EA ID / permit SVT01633 · S/21/26094/R Outlet location SO7318526190 (OS grid reference) · View on Apple Maps WFD catchment Ell Bk - source to conf R Leadon (GB109054032520) 2024 spills / hours 33 / 203 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 86 hours spilling →	Ell Brook	17	86	down 48%	100%
Ashover Overton Hall STW Inlet overflow at sewage works Sewage works Ashover Overton Hall Company site name ASHOVER - OVERTON HALL STW (CSO) EA ID / permit SVT00128 · T/41/45762/R Outlet location SK3477761997 (OS grid reference) · View on Apple Maps WFD catchment Amber from Source to Press Brook (GB104028052380) 2024 spills / hours 39 / 119 Long-term average 41.7 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 85 hours spilling →	Cockwell Sough	31	85	down 21%	99%
Temeside Pumping Station Storm discharge at pumping station Company site name LUDLOW - TEMESIDE (SSO) EA ID / permit SVT02277 · S/09/21650/O Outlet location SO5199074230 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Onny to conf R Severn (GB109054044510) 2024 spills / hours 60 / 317 Long-term average 49.3 spills a year (monitored since 2020) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - May Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 85 hours spilling →	River Teme	28	85	down 53%	89%
Ladygate - Storm/Emergency O/F Storm discharge at pumping station Company site name DISEWORTH - LADYGATE (SSO) EA ID / permit SVT01306 · T/57/08273/O Outlet location SK4540024300 (OS grid reference) · View on Apple Maps WFD catchment Long Whatton Brook Catchment (trib of Soar) (GB104028047170) 2024 spills / hours 30 / 208 Long-term average 17.5 spills a year (monitored since 2020) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 85 hours spilling →	Long Whatton/Diseworth Brook	18	85	down 40%	100%
The Rocks Combined Sewer Overflow Overflow on sewer network Company site name SHREWSBURY - THE ROCKS (CSO) EA ID / permit SVT02302 · S/02/04975/O Outlet location SJ4931511098 (OS grid reference) · View on Apple Maps WFD catchment Rea Bk - conf Pontesford Bk to conf R Severn (GB109054049630) 2024 spills / hours 37 / 234 Long-term average 20.0 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 85 hours spilling →	Rea Brook	14	85	down 62%	100%
Yoxall Combined Sewer Overflow Storm discharge at pumping station Company site name YOXALL - BOND END (CSO) EA ID / permit SVT02657 · T/07/30300/O Outlet location SK1411518198 (OS grid reference) · View on Apple Maps WFD catchment Swarbourn Catcment (trib of Trent) (GB104028047400) 2024 spills / hours 42 / 271 Long-term average 23.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 85 hours spilling →	River Swarbourn	19	85	down 55%	100%
Long Lane Storm Sewage Overflow Overflow on sewer network Company site name HALESOWEN - LONG LANE (CSO) EA ID / permit SVT01403 · T/08/36010/O Outlet location SO9756086280 (OS grid reference) · View on Apple Maps WFD catchment Tame (Oldbury Arm) - source to conf R Tame (Wton Arm) (GB104028042601) 2024 spills / hours 49 / 119 Long-term average 25.6 spills a year (monitored since 2021) High-spill reason (company) Data collection - EDM non-representative location Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 85 hours spilling →	Tributary of the River Tame	36	85	down 27%	100%
Water Lane - Storm/Emergency O/F Storm discharge at pumping station Company site name FRISBY ON THE WREAKE (CSO) EA ID / permit SVT02463 · T/55/12350/O Outlet location SK6930017910 (OS grid reference) · View on Apple Maps WFD catchment Eye / Wreake from Langham Brook to Soar (GB104028047550) 2024 spills / hours 33 / 266 Long-term average 21.0 spills a year (monitored since 2023) Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 84 hours spilling →	River Wreake (Eye)	14	84	down 58%	100%
Werrington Road CSO Overflow on sewer network Company site name BUCKNALL - WERRINGTON ROAD (CSO) EA ID / permit SVT02502 · T/01/35719/O Outlet location SJ9065847605 (OS grid reference) · View on Apple Maps WFD catchment Trent - Ford Green Bk to Fowlea Bk (GB104028053301) 2024 spills / hours 49 / 134 Long-term average 63.2 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 84 hours spilling →	Trib (Ditch) of River Trent	35	84	down 29%	100%
Derby - Eastgate/Pentagon Island (CSO) Overflow on sewer network EA ID / permit SVT00834 · T/48/00758/O Outlet location SK3727135791 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Bottle Brook to Trent (GB104028053240) 2024 spills / hours 24 / 135 Long-term average 21.4 spills a year (monitored since 2019) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 84 hours spilling →	River Derwent	15	84	down 38%	100%
Alfreton - Meadow Lane Sewage PS Storm discharge at pumping station Company site name ALFRETON - MEADOW LANE (SSO) EA ID / permit SVT00045 · T/41/40224/O Outlet location SK4196556565 (OS grid reference) · View on Apple Maps WFD catchment Alfreton Brook from Westwood Brook to Amber (GB104028052320) 2024 spills / hours 49 / 209 Long-term average 50.6 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 83 hours spilling →	Tributary of Alfreton Brook	33	83	down 33%	100%
Congerstone Pumping Station Storm discharge at pumping station Company site name BILSTONE - CONGERSTONE (CSO) EA ID / permit SVT00631 · T/20/30033/O Outlet location SK3653005130 (OS grid reference) · View on Apple Maps WFD catchment Sence - Ibstock Bk to R Anker (GB104028046660) 2024 spills / hours 24 / 229 Long-term average 14.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 83 hours spilling →	River Sence	8	83	down 67%	100%
Swanwick - Hickton Road SPS Storm discharge at pumping station Company site name SWANWICK - HICKTON ROAD (SSO) EA ID / permit SVT01114 · T/41/40340/O Outlet location SK4044852463 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 28 / 47 Long-term average 34.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 83 hours spilling →	Tributary of Hartshay Brook	28	83	no change	99%
Boughton STW Storm tank at sewage works Sewage works Boughton Company site name BOUGHTON STW (SSTO) EA ID / permit SVT00313 · T/72/45594/R Outlet location SK6785067535 (OS grid reference) · View on Apple Maps WFD catchment Bevercotes Beck Catchment (trib of Maun) (GB104028058070) 2024 spills / hours 23 / 131 Long-term average 17.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 83 hours spilling →	Boughton Dyke	11	83	down 52%	100%
Langwith CSO Overflow on sewer network Company site name NETHER LANGWITH - MAIN ROAD (CSO) EA ID / permit SVT01320 · T/73/20354/O Outlet location SK5364770459 (OS grid reference) · View on Apple Maps WFD catchment Poulter from Source to Millwood Brook (GB104028058130) 2024 spills / hours 91 / 608 Long-term average 64.3 spills a year (monitored since 2019) 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 82 hours spilling →	River Poulter	39	82	down 57%	100%
Shrewsbury - Coleham Head (CSO) Overflow on sewer network EA ID / permit SVT02032 · Permit application submitted Outlet location SJ4969612256 (OS grid reference) · View on Apple Maps WFD catchment Rea Bk - conf Pontesford Bk to conf R Severn (GB109054049630) 2024 spills / hours 48 / 106 Long-term average 43.5 spills a year (monitored since 2022) Monitor below 90% Sensor failure / issue · Scheduled Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 82 hours spilling →	Rea Brook	25	82	down 48%	90%
Southwell - Newark Road CSO Overflow on sewer network Company site name SOUTHWELL - NEWARK ROAD (CSO) EA ID / permit SVT02121 · T/64/45855/O Outlet location SK7108454057 (OS grid reference) · View on Apple Maps WFD catchment Greet Catchment (trib of Trent) (GB104028053410) 2024 spills / hours 22 / 50 Long-term average 30.4 spills a year (monitored since 2021) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 82 hours spilling →	River Greet	27	82	up 23%	100%
Broadgate Storm Sewage Overflow Overflow on sewer network Company site name BEESTON - BROADGATE REC GROUND (CSO) EA ID / permit SVT00361 · T/62/46121/O Outlet location SK5462035560 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 57 / 113 Long-term average 58.5 spills a year (monitored since 2022) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 82 hours spilling →	River Trent	52	82	down 9%	100%

Sewage treatment works

Storm tanks and inlet overflows at each Severn Trent Water sewage works. The figures are 2025 spills.

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