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
Peel Street Combined Sewer Overflow Overflow on sewer network Company site name SUTTON IN ASHFIELD - PEEL STREET (CSO) EA ID / permit SVT01777 · T/70/45413/O Outlet location SK5028058991 (OS grid reference) · View on Apple Maps WFD catchment Maun from Source to Vicar Water (GB104028052960) 2024 spills / hours 10 / 24 Long-term average 19.6 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 49 hours spilling →	Trib of River Maun	18	49	up 80%	100%
Wem Drawel P.Stn Storm Overflow Storm discharge at pumping station Company site name WEM - DRAWWELL LANE SPS (CSO) EA ID / permit SVT02496 · S/04/05896/O Outlet location SJ5130028600 (OS grid reference) · View on Apple Maps WFD catchment Roden - conf Sleap Bk to conf R Tern (GB109054049190) 2024 spills / hours 17 / 212 Long-term average 7.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 49 hours spilling →	Wem Brook (River Roden)	6	49	down 65%	100%
Keyworth - Wynbreck Dr CSO Overflow on sewer network Company site name KEYWORTH - WYNBRECK DRIVE 28 (CSO) EA ID / permit SVT01250 · T/62/40036/O Outlet location SK6190431779 (OS grid reference) · View on Apple Maps WFD catchment Polser Brook from Source to Cotgrave Brook (GB104028053180) 2024 spills / hours 18 / 68 Long-term average 17.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	Tributary of Polser Brook	16	48	down 11%	100%
Ellesmere - Wharf Road SPS Storm discharge at pumping station Company site name ELLESMERE - WHARF ROAD PS (CSO) EA ID / permit SVT00857 · S/03/09296/O Outlet location SJ3997334649 (OS grid reference) · View on Apple Maps WFD catchment Tetchill Bk - source to conf R Perry (GB109054055000) 2024 spills / hours 35 / 60 Long-term average 34.9 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 ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	Newnes Brook	31	48	down 11%	100%
Tudor Road/Paget Road CSO Overflow on sewer network Company site name LEICESTER - TUDOR ROAD/PAGET ROAD (CSO) EA ID / permit SVT02348 · T/53/03685/O Outlet location SK5789404912 (OS grid reference) · View on Apple Maps WFD catchment Soar from Sence to Rothley Brook (GB104028047030) 2024 spills / hours 39 / 177 Long-term average 36.7 spills a year (monitored since 2019) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 48 hours spilling →	River Soar	21	48	down 46%	94%
Stanley Village CSO Overflow on sewer network Company site name STANLEY - GLEBE CRESCENT (CSO) EA ID / permit SVT02166 · T/61/01094/O Outlet location SK4219540347 (OS grid reference) · View on Apple Maps WFD catchment Nut Brook Catchment (trib of Erewash) (GB104028052520) 2024 spills / hours 18 / 61 Long-term average 11.7 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 48 hours spilling →	Stanley Brook (Erewash Trib)	19	48	up 6%	100%
Riverside Towpath CSO Overflow on sewer network Company site name CASTLEFIELDS - VICTORIA ST (CSO) EA ID / permit SVT01894 · S/02/21365/O Outlet location SJ4980313020 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf Bele Bk to conf Sundorne Bk (GB109054049142) 2024 spills / hours 46 / 341 Long-term average 95.4 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 48 hours spilling →	River Severn	27	48	down 41%	97%
Orchard Way CSO Overflow on sewer network Company site name HUNTLEY - ORCHARD WAY (CSO) EA ID / permit SVT01728 · S/21/09311/O Outlet location SO7272519909 (OS grid reference) · View on Apple Maps WFD catchment Huntley-Tibberton Bk - source to conf Red Bk (GB109054032480) 2024 spills / hours 37 / 106 Long-term average 28.7 spills a year (monitored since 2019) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 48 hours spilling →	Trib of the River Leadon	23	48	down 38%	100%
Battleton Syphon Overflow on sewer network Company site name EVESHAM - BATTLETON SYPHON 15 (CSO) EA ID / permit SVT00206 · S/17/23078/O Outlet location SP0380843335 (OS grid reference) · View on Apple Maps WFD catchment Avon conf Workman Br, Evesham to conf R Severn (GB109054044403) 2024 spills / hours 39 / 206 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 48 hours spilling →	River Avon	17	48	down 56%	99%
Tamworth Swage Pumping Station Storm discharge at pumping station Company site name DOSTHILL - TAMWORTH ROAD (SSO) EA ID / permit SVT02271 · T/16/36398/O Outlet location SK2148200505 (OS grid reference) · View on Apple Maps WFD catchment Tame from R Blythe to River Anker (GB104028046440) 2024 spills / hours 18 / 76 Long-term average 12.9 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 48 hours spilling →	Tributary of River Tame	8	48	down 56%	100%
Roseway Street CSO Overflow on sewer network Company site name STOKE GOLDING - THE ROSEWAY (CSO) EA ID / permit SVT01905 · T/20/03817/O Outlet location SP4000497760 (OS grid reference) · View on Apple Maps WFD catchment Stoke Golding Brook from Source to R Sence (GB104028046640) 2024 spills / hours 24 / 38 Long-term average 32.6 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	Ashby De La Zouch Canal	19	48	down 21%	100%
Owston Ferry - Station Road (SSO) Storm discharge at pumping station EA ID / permit SVT01745 · Permit application submitted Outlet location SE8092200108 (OS grid reference) · View on Apple Maps WFD catchment Ferry Drain Catchment (trib of Trent) (GB104028058241) 2024 spills / hours 7 / 42 Long-term average 7.5 spills a year (monitored since 2024) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	Tributary of River Trent	8	48	up 14%	100%
Harworth Pumping Station Storm discharge at pumping station Company site name HARWORTH - CHURCH ENTRANCE (SSO) EA ID / permit SVT01077 · T/83/45133/O Outlet location SK6133091700 (OS grid reference) · View on Apple Maps WFD catchment Torne from Ruddle to St Catherine's Well Stream (GB104028058400) 2024 spills / hours 15 / 86 Long-term average 17.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 48 hours spilling →	Harworth Dyke	10	48	down 33%	100%
Ambergate (Hagwood) Pumping St Storm discharge at pumping station Company site name AMBERGATE - HAG WOOD (CSO) EA ID / permit SVT00071 · T/41/21542/O Outlet location SK3566051870 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 68 / 761 Long-term average 90.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 47 hours spilling →	River Amber	19	47	down 72%	100%
Coreley - Tenbury Road (CSO) Inlet overflow at sewage works (with treatment) Sewage works Coreley Tenbury Road EA ID / permit SVT02704 · S/09/55836/O Outlet location SO6075574174 (OS grid reference) · View on Apple Maps WFD catchment Teme - conf R Onny to conf R Severn (GB109054044510) Treatment Reed bed 2024 spills / hours 39 / 150 Long-term average 30.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 47 hours spilling →	The Corn Brook	22	47	down 44%	100%
Ettington Sewage Treatment Works Inlet overflow at sewage works Sewage works Ettington Company site name ETTINGTON WORKS (STW) EA ID / permit SVT00877 · S/13/25835/R Outlet location SP2734049260 (OS grid reference) · View on Apple Maps WFD catchment Dene - Butlers Marston to conf R Avon (GB109054039540) 2024 spills / hours 50 / 96 Long-term average 29.8 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 47 hours spilling →	Trib of River Dene	41	47	down 18%	100%
Tansley Old Coach Road (Pond) CSO Overflow on sewer network Company site name TANSLEY - OLD COACH ROAD (POND) (CSO) EA ID / permit SVT02272 · T/40/21109/O Outlet location SK3210559988 (OS grid reference) · View on Apple Maps WFD catchment Bentley Brook Catchment (trib of Derwent) (GB104028052810) 2024 spills / hours 17 / 51 Long-term average 15.1 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 47 hours spilling →	Trib of Bentley Brook	13	47	down 24%	99%
Princes Drive CSO 19A Overflow on sewer network Company site name LEAMINGTON - PRINCES DR (REF 19A) (CSO) EA ID / permit SVT01826 · S/12/20263/O Outlet location SP3083665407 (OS grid reference) · View on Apple Maps WFD catchment Leam - conf R Itchen to conf R Avon (GB109054044140) 2024 spills / hours 29 / 65 Long-term average 26.4 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed Improvement UWWTR improvement completed Volume & pollution Estimate from 47 hours spilling →	River Leam	13	47	down 55%	100%
Sir Johns Road CSO Overflow on sewer network Company site name CANNON HILL PARK-OFF PERSHORE RD (CSO) EA ID / permit SVT02056 · T/09/36130/O Outlet location SP0634183568 (OS grid reference) · View on Apple Maps WFD catchment Rea from Bourn Brook to River Tame (GB104028042550) 2024 spills / hours 4 / 28 Long-term average 6.8 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 47 hours spilling →	River Rea	11	47	up 175%	93%
Baslow Road CSO Overflow on sewer network Company site name BAKEWELL - BASLOW ROAD (CSO) EA ID / permit SVT00194 · T/38/02671/O Outlet location SK2192169124 (OS grid reference) · View on Apple Maps WFD catchment Wye from Monk's Dale to Derwent (GB104028057820) 2024 spills / hours 20 / 34 Long-term average 18.6 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 47 hours spilling →	River Wye (Tributary)	16	47	down 20%	100%
Thornhill Road CSO Overflow on sewer network Company site name SHREWSBURY -THE MOUNT/THORNHILL RD (CSO) EA ID / permit SVT02306 · S/02/21009/O Outlet location SJ4721613331 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf Bele Bk to conf Sundorne Bk (GB109054049142) Bathing water River Severn in Shrewsbury 2024 spills / hours 12 / 66 Long-term average 52.2 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 47 hours spilling →	River Severn	25	47	up 108%	100%
Linton South Storm discharge at pumping station Company site name LINTON - COLLIERY LANE (SSO) EA ID / permit SVT01371 · T/24/07093/O Outlet location SK2730015900 (OS grid reference) · View on Apple Maps WFD catchment Mease from Hooborough Brook to Trent (GB104028046560) 2024 spills / hours 13 / 24 Long-term average 18.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 47 hours spilling →	Warren Hill Brook	17	47	up 31%	94%
Kingsbury Pumping Station Storm discharge at pumping station Company site name KINGSBURY (SSO) EA ID / permit SVT01280 · T/16/07864/O Outlet location SP2120097300 (OS grid reference) · View on Apple Maps WFD catchment Tame from R Blythe to River Anker (GB104028046440) 2024 spills / hours 18 / 131 Long-term average 8.2 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 47 hours spilling →	Thistlewood Brook	4	47	down 78%	100%
Great Dalby Pumping Station Storm discharge at pumping station Company site name GREAT DALBY - MAIN STREET (SSO) EA ID / permit SVT00993 · T/55/40329/O Outlet location SK7432014680 (OS grid reference) · View on Apple Maps WFD catchment Great Dalby Brook Catchment (trib of Wreake) (GB104028047510) 2024 spills / hours 31 / 269 Long-term average 17.4 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 46 hours spilling →	Trib of River Wreake	7	46	down 77%	95%
Plungar - Granby Lane - Pells Farm (SSO) Storm discharge at pumping station EA ID / permit SVT01804 · Permit application submitted Outlet location SK7658034178 (OS grid reference) · View on Apple Maps WFD catchment The Grimmer from Source to Rundle Beck (GB104028053060) 2024 spills / hours 29 / 20 Long-term average 22.3 spills a year (monitored since 2023) Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	Grantham Canal	29	46	no change	100%
Brailsford Combined Sewer Overflow Inlet overflow at sewage works Sewage works Brailsford Combined Sewer Company site name BRAILSFORD STW (CSO) EA ID / permit SVT00324 · T/34/21308/O Outlet location SK2566140821 (OS grid reference) · View on Apple Maps WFD catchment Hilton Bk (trib of R Dove) (GB104028052870) 2024 spills / hours 40 / 137 Long-term average 29.0 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	Trib of Brailsford Brook	16	46	down 60%	100%
Shardlow Rectory SPS Storm discharge at pumping station Company site name ASTON-ON-TRENT - SHARDLOW ROAD PS (CSO) EA ID / permit SVT00141 · EPRYB3094NG Outlet location SK4400030200 (OS grid reference) · View on Apple Maps WFD catchment Trent from Dove to Derwent (GB104028047420) 2024 spills / hours 30 / 263 Long-term average 18.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 46 hours spilling →	River Trent (Non-Tidal) (Trib)	9	46	down 70%	100%
PS and CSO - Countesthorpe Overflow on sewer network Company site name COUNTESTHORPE - GWENDOLINE DR PS (CSO) EA ID / permit SVT01828 · T/51/02170/O Outlet location SP5890095500 (OS grid reference) · View on Apple Maps WFD catchment Sence from Countesthorpe Brook to Soar (GB104028046870) 2024 spills / hours 18 / 61 Long-term average 7.2 spills a year (monitored since 2021) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	Countesthorpe Brook	10	46	down 44%	100%
Derby - Wayzgoose Drive (CSO) Overflow on sewer network EA ID / permit SVT00833 · EPRKB3594WC Outlet location SK3727135791 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Bottle Brook to Trent (GB104028053240) 2024 spills / hours 24 / 72 Long-term average 20.3 spills a year (monitored since 2019) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	River Derwent	20	46	down 17%	100%
Little Aston Sewage Treatment Works Storm tank at sewage works Sewage works Little Aston Company site name LITTLE ASTON STW (SSTO) EA ID / permit SVT01375 · T/17/35743/R Outlet location SK0922501949 (OS grid reference) · View on Apple Maps WFD catchment Footherley Brook from Source to Black-Bourne Brook (GB104028046450) 2024 spills / hours 20 / 60 Long-term average 25.2 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 46 hours spilling →	Footherley Brook	14	46	down 30%	99%
Redmile STW Storm tank at sewage works Sewage works Redmile Company site name REDMILE (STW) EA ID / permit SVT01883 · T/66/46191/R Outlet location SK7935735244 (OS grid reference) · View on Apple Maps WFD catchment The Grimmer from Source to Rundle Beck (GB104028053060) 2024 spills / hours 34 / 211 Long-term average 27.8 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement UWWTR improvement completed, Operational improvement completed Volume & pollution Estimate from 46 hours spilling →	The Grimmer	9	46	down 74%	99%
Edwinstowe CSO Overflow on sewer network Company site name EDWINSTOWE - FOURTH AVENUE (CSO) EA ID / permit SVT00848 · T/70/07146/O Outlet location SK6252366354 (OS grid reference) · View on Apple Maps WFD catchment Maun from Vicar Water to Rainworth Water (GB104028058040) 2024 spills / hours 31 / 69 Long-term average 33.0 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 45 hours spilling →	River Maun	33	45	up 6%	100%
Woodyard Lane CSO Overflow on sewer network Company site name WHETSTONE - NEXT TO 20 WOODYARD LA (CSO) EA ID / permit SVT02624 · T/51/21105/O Outlet location SP5585198222 (OS grid reference) · View on Apple Maps WFD catchment Sence from Countesthorpe Brook to Soar (GB104028046870) 2024 spills / hours 20 / 153 Long-term average 13.4 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 45 hours spilling →	Tributary of River Sence	13	45	down 35%	100%
N Leamington Foul Sewer CSO 90 Overflow on sewer network Company site name LEAMINGTON - ADELAIDE RD (CSO) EA ID / permit SVT01595 · S/12/20261/O Outlet location SP3084465428 (OS grid reference) · View on Apple Maps WFD catchment Leam - conf R Itchen to conf R Avon (GB109054044140) 2024 spills / hours 29 / 57 Long-term average 17.1 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing Improvement UWWTR improvement completed Volume & pollution Estimate from 45 hours spilling →	River Leam	17	45	down 41%	100%
Southwell - Riverside (CSO) Overflow on sewer network EA ID / permit SVT02140 · EPRHB3993VN Outlet location SK6990053300 (OS grid reference) · View on Apple Maps WFD catchment Greet Catchment (trib of Trent) (GB104028053410) 2024 spills / hours 22 / 64 Long-term average 25.1 spills a year (monitored since 2019) Investigation UWWTR investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 45 hours spilling →	River Greet	19	45	down 14%	99%
Field No. 7078 CSO Overflow on sewer network Company site name BROSELEY - DARK LANE (FIELD 7078) (CSO) EA ID / permit SVT00897 · S/02/21268/O Outlet location SJ6770501733 (OS grid reference) · View on Apple Maps WFD catchment Severn conf M Wenlock-Farley Bk to conf R Worfe (GB109054049143) 2024 spills / hours 89 / 151 Long-term average 99.3 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 45 hours spilling →	Tributary of River Severn	54	45	down 39%	100%
Forest Road CSO Overflow on sewer network Company site name NARBOROUGH - FOREST ROAD (CSO) EA ID / permit SVT01600 · T/50/40087/O Outlet location SP5292998656 (OS grid reference) · View on Apple Maps WFD catchment Soar from Thurlaston Brook to Sence (GB104028046880) 2024 spills / hours 55 / 112 Long-term average 54.4 spills a year (monitored since 2019) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 45 hours spilling →	Tributary of River Soar	30	45	down 45%	94%
Pinxton - Station Road SPS Storm discharge at pumping station Company site name PINXTON - STATION ROAD PS (CSO) EA ID / permit SVT02185 · NPSWQD010460 Outlet location SK4641854685 (OS grid reference) · View on Apple Maps WFD catchment Erewash from Source to Nethergreen Brook (GB104028052740) 2024 spills / hours 11 / 14 Long-term average 27.8 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 45 hours spilling →	River Erewash	20	45	up 82%	100%
Delves Farm CSO Overflow on sewer network Company site name SWANWICK - THE DELVES (FARM LAYBY) (CSO) EA ID / permit SVT00748 · T/41/45456/O Outlet location SK4125353048 (OS grid reference) · View on Apple Maps WFD catchment Amber from Alfreton Brook to Derwent (GB104028052330) 2024 spills / hours 44 / 73 Long-term average 49.7 spills a year (monitored since 2019) High-spill reason (company) Performance - Partial / no capacity due to blockage or restriction (e.g. roots / grid) - maintenance issue Investigation Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 45 hours spilling →	Tributary of Hartshay Brook	31	45	down 30%	100%
Ombersley STW Storm tank at sewage works Sewage works Ombersley Company site name OMBERSLEY STW (SSTO) EA ID / permit SVT01724 · S/07/12734/R Outlet location SO8543065120 (OS grid reference) · View on Apple Maps WFD catchment Hadley Bk - source to conf R Salwarpe (GB109054044180) 2024 spills / hours 20 / 130 Long-term average 15.0 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 45 hours spilling →	Elmley/Hadley Brook	5	45	down 75%	100%
Tibberton - Greenhouses SPS Storm discharge at pumping station Company site name TIBBERTON - GREENHOUSES (CSO) EA ID / permit SVT02314 · S/04/55250/O Outlet location SJ6795120485 (OS grid reference) · View on Apple Maps WFD catchment Meese - Outflow Aqualate Mere to conf R Ter (GB109054050200) 2024 spills / hours 47 / 243 Long-term average 31.0 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 45 hours spilling →	River Meese	21	45	down 55%	99%
Auburn Road Combined Sewer Overflow Overflow on sewer network Company site name BLABY - AUBURN ROAD (CSO) EA ID / permit SVT00147 · EPRKB3592NQ Outlet location SP5640798238 (OS grid reference) · View on Apple Maps WFD catchment Sence from Countesthorpe Brook to Soar (GB104028046870) 2024 spills / hours 8 / 71 Long-term average 18.7 spills a year (monitored since 2019) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 45 hours spilling →	Tributary of River Sence	16	45	up 100%	99%
Hanwood Sewage Pumping Station Storm discharge at pumping station Company site name HANWOOD - CARADOC VIEW (SSO) EA ID / permit SVT00475 · S/02/55420/O Outlet location SJ4536109951 (OS grid reference) · View on Apple Maps WFD catchment Rea Bk - conf Pontesford Bk to conf R Severn (GB109054049630) 2024 spills / hours 28 / 101 Long-term average 17.0 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Rea Brook	9	44	down 68%	100%
331 Sneinton Dale CSO Overflow on sewer network Company site name SNEINTON - SNEINTON DALE 331 (CSO) EA ID / permit SVT00005 · T/64/21892/O Outlet location SK5907038770 (OS grid reference) · View on Apple Maps WFD catchment Trent from Soar to The Beck (GB104028053110) 2024 spills / hours 55 / 78 Long-term average 57.6 spills a year (monitored since 2017) 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 44 hours spilling →	River Trent	46	44	down 16%	96%
Dana Steps CSO Overflow on sewer network Company site name CASTLEFIELDS - DANA STEPS (CSO) EA ID / permit SVT00725 · S/02/21486/O Outlet location SJ4960112886 (OS grid reference) · View on Apple Maps WFD catchment Severn - conf Bele Bk to conf Sundorne Bk (GB109054049142) 2024 spills / hours 47 / 145 Long-term average 68.7 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 44 hours spilling →	River Severn	26	44	down 45%	97%
Carlton SPS - Storm/Emergency of Storm discharge at pumping station Company site name CARLTON IN LINDRICK -WATER LA FOUL (SSO) EA ID / permit SVT00483 · T/76/01281/O Outlet location SK5960084600 (OS grid reference) · View on Apple Maps WFD catchment Owlands Wood Dyke from Source to Hodscok Brook (GB104028058170) 2024 spills / hours 12 / 67 Long-term average 11.0 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Walling Wells Brook	5	44	down 58%	97%
Quorn - Soar Road (CSO) Overflow on sewer network EA ID / permit SVT02403 · EPRHB3997EU Outlet location SK5660016600 (OS grid reference) · View on Apple Maps WFD catchment Soar from Rothley Brook to Long Whatton Brook (GB104028047211) 2024 spills / hours 32 / 319 Long-term average 23.7 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 44 hours spilling →	River Soar - Tributary	12	44	down 63%	100%
Cropthorne - Main Street SPS Storm discharge at pumping station Company site name CROPTHORNE - MAIN STREET (SSO) EA ID / permit SVT00685 · S/17/25066/O Outlet location SO9959944641 (OS grid reference) · View on Apple Maps WFD catchment Elmley Castle - source to conf R Avon (GB109054039390) 2024 spills / hours 32 / 302 Long-term average 11.2 spills a year (monitored since 2020) 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 44 hours spilling →	Tributary of River Avon	6	44	down 81%	88%
Yardley Wood Rd/Haunch Lane Jct CSO Overflow on sewer network Company site name YARDLEY WOOD - FIRTH DRIVE 9 (CSO) EA ID / permit SVT02650 · T/12/36479/O Outlet location SP0871979991 (OS grid reference) · View on Apple Maps WFD catchment Cole from Source to Springfield (GB104028042501) 2024 spills / hours 27 / 48 Long-term average 24.3 spills a year (monitored since 2020) Investigation UWWTR investigation completed, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Chinn Brook	17	44	down 37%	100%
Kings Newton - Main Street CSO Storm discharge at pumping station Company site name KINGS NEWTON - MAIN STREET (CSO) EA ID / permit SVT01274 · T/36/21330/O Outlet location SK3939526306 (OS grid reference) · View on Apple Maps WFD catchment Ramsley Brook from Source to Carr-New Brook (GB104028047340) 2024 spills / hours 29 / 51 Long-term average 29.0 spills a year (monitored since 2021) Investigation UWWTR investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 43 hours spilling →	Tributary of Ramsley Brook	30	43	up 3%	97%

Sewage treatment works

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

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