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

020k40k60kJan 2025: 59,762 hours spillingJanFeb 2025: 8,544 hours spillingFebMar 2025: 2,127 hours spillingMarApr 2025: 992 hours spillingAprMay 2025: 2,015 hours spillingMayJun 2025: 1,050 hours spillingJunJul 2025: 2,845 hours spillingJulAug 2025: 481 hours spillingAugSep 2025: 8,682 hours spillingSepOct 2025: 4,788 hours spillingOctNov 2025: 51,286 hours spillingNovDec 2025: 57,819 hours spillingDec
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.

OverflowDischarges toSpills 2025Hours 2025Spills vs 2024Monitor uptime
Dorridge - Norton Green Lane SPS
Storm discharge at pumping station
Company site name
DORRIDGE - NORTON GREEN LANE (SSO)
EA ID / permit
SVT00782 · T/11/35890/O
Outlet location
SP1812474697 (OS grid reference) · View on Apple Maps
WFD catchment
Cuttle Brook from Source to River Blythe (GB104028042390)
2024 spills / hours
69 / 830
Long-term average
35.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 331 hours spilling →
Tributary of Cuttle Brook 31 331 down 55% 100%
Winkhill Pumping Station
Storm discharge at pumping station
Company site name
WINKHILL (CSO)
EA ID / permit
SVT02574 · T/27/35329/O
Outlet location
SK0602051380 (OS grid reference) · View on Apple Maps
WFD catchment
Hamps from Source to R Manifold (GB104028052900)
2024 spills / hours
45 / 559
Long-term average
21.7 spills a year (monitored since 2019)
Investigation
UWWTR investigation completed, Operational investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 330 hours spilling →
River Hamps 25 330 down 44% 97%
Newthorpe Sewage Treatment Works
Storm tank at sewage works
Sewage works
Newthorpe
Company site name
NEWTHORPE STW (SSTO)
EA ID / permit
SVT01645 · T/61/45995/R
Outlet location
SK4777144650 (OS grid reference) · View on Apple Maps
WFD catchment
Gilt Brook Catchment (trib of Erewash) (GB104028052570)
2024 spills / hours
69 / 767
Long-term average
64.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 326 hours spilling →
Gilt Brook 42 326 down 39% 100%
Mill Street CSO
Storm discharge at pumping station
Company site name
PREES - MILL STREET (CSO)
EA ID / permit
SVT01569 · S/04/21583/O
Outlet location
SJ5510533527 (OS grid reference) · View on Apple Maps
WFD catchment
Soulton Bk - source to conf R Roden (GB109054049201)
2024 spills / hours
0 / 0.0
Long-term average
50.3 spills a year (monitored since 2023)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 325 hours spilling →
Trib of Sidleymoor Brook 151 325 up from 0 99%
Norton Green STW
Storm tank at sewage works
Sewage works
Norton Green
Company site name
NORTON GREEN STW (SSTO)
EA ID / permit
SVT01677 · T/11/35235/R
Outlet location
SP1860074700 (OS grid reference) · View on Apple Maps
WFD catchment
Cuttle Brook from Source to River Blythe (GB104028042390)
2024 spills / hours
69 / 903
Long-term average
60.2 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 325 hours spilling →
Grand Union Canal Stream 30 325 down 57% 100%
Ackleton and Stableford STW
Storm tank at sewage works
Sewage works
Ackleton And Stableford
Company site name
ACKLETON - STABLEFORD STW (SSTO)
EA ID / permit
SVT00023 · S/05/55894/R
Outlet location
SO7621598862 (OS grid reference) · View on Apple Maps
WFD catchment
Worfe - conf Wesley Bk to conf R Severn (GB109054050260)
2024 spills / hours
180 / 3,205
Long-term average
89.8 spills a year (monitored since 2020)
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 323 hours spilling →
River Worfe 18 323 down 90% 100%
Alfreton Sewage Treatment Works
Storm tank at sewage works
Sewage works
Alfreton
Company site name
ALFRETON STW (CSO)
EA ID / permit
SVT00046 · T/41/45824/R
Outlet location
SK4121856847 (OS grid reference) · View on Apple Maps
WFD catchment
Alfreton Brook from Westwood Brook to Amber (GB104028052320)
2024 spills / hours
43 / 422
Long-term average
35.0 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 323 hours spilling →
Alfreton Brook 30 323 down 30% 100%
Marchington STW
Storm tank at sewage works
Sewage works
Marchington
Company site name
MARCHINGTON STW (SSTO)
EA ID / permit
SVT01492 · T/33/36156/R
Outlet location
SK1566730279 (OS grid reference) · View on Apple Maps
WFD catchment
Dove - R Churnet to R Trent (GB104028052420)
2024 spills / hours
27 / 245
Long-term average
36.2 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 320 hours spilling →
Tributary of River Dove 25 320 down 7% 100%
Hinckley Sewage Treatment Works
Storm tank at sewage works
Sewage works
Hinckley
Company site name
HINCKLEY (STW)
EA ID / permit
SVT01149 · T/19/36495/R
Outlet location
SP4213092830 (OS grid reference) · View on Apple Maps
WFD catchment
Sketchley Brook from Source to River Anker (GB104028042470)
2024 spills / hours
78 / 721
Long-term average
80.7 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
UWWTR improvement ongoing
Volume & pollution
Estimate from 318 hours spilling →
Sketchley Brook 42 318 down 46% 100%
Wanlip Sewage Treatment Works
Storm tank at sewage works
Sewage works
Wanlip
Company site name
SSTO OVERFLOW-3PG-RIVER SOAR1
EA ID / permit
SVT02441 · 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
78 / 961
Long-term average
66.5 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 ongoing
Improvement
UWWTR improvement ongoing
Volume & pollution
Estimate from 318 hours spilling →
River Soar 37 318 down 53% 100%
Huthwaite Sewage Treatment Works
Storm tank at sewage works
Sewage works
Huthwaite
Company site name
HUTHWAITE STW (SSO)
EA ID / permit
SVT01199 · T/41/45831/R
Outlet location
SK4682958180 (OS grid reference) · View on Apple Maps
WFD catchment
Alfreton Brook from Source to Westwood Brook (GB104028052350)
2024 spills / hours
53 / 635
Long-term average
56.8 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 317 hours spilling →
Nunn Brook 29 317 down 45% 100%
Market Bosworth STW
Storm tank at sewage works
Sewage works
Market Bosworth
Company site name
MARKET BOSWORTH STW (SSTO)
EA ID / permit
SVT01499 · T/20/35543/R
Outlet location
SK3906804254 (OS grid reference) · View on Apple Maps
WFD catchment
Carlton Brook from Source to River Sence (GB104028046690)
2024 spills / hours
73 / 692
Long-term average
66.8 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 315 hours spilling →
Carlton Brook 35 315 down 52% 99%
Dale Road North CSO
Overflow on sewer network
Company site name
NORTHWOOD - DALE ROAD NORTH (CSO)
EA ID / permit
SVT00722 · EPRLB3496WE
Outlet location
SK2614764520 (OS grid reference) · View on Apple Maps
WFD catchment
Derwent from Wye to Amber (GB104028052390)
2024 spills / hours
76 / 293
Long-term average
52.7 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 315 hours spilling →
River Derwent 71 315 down 7% 100%
Bacon Springs CSO
Overflow on sewer network
Company site name
CLAY CROSS - BACON SPRINGS (CSO)
EA ID / permit
SVT00154 · T/41/21895/O
Outlet location
SK3881862457 (OS grid reference) · View on Apple Maps
WFD catchment
Press Brook Catchment (trib of Amber) (GB104028052370)
2024 spills / hours
71 / 362
Long-term average
56.0 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 313 hours spilling →
Smithy Brook 52 313 down 27% 100%
Lower Moor STW
Inlet overflow at sewage works
Sewage works
Lower Moor
Company site name
LOWER MOOR STW (CSO)
EA ID / permit
SVT01434 · S/17/25770/R
Outlet location
SO9761846821 (OS grid reference) · View on Apple Maps
WFD catchment
Avon conf Workman Br, Evesham to conf R Severn (GB109054044403)
2024 spills / hours
225 / 4,428
Long-term average
130.5 spills a year (monitored since 2020)
Investigation
UWWTR investigation ongoing, Operational investigation completed
Improvement
UWWTR improvement completed, Operational improvement completed
Volume & pollution
Estimate from 313 hours spilling →
Tributary of River Avon 18 313 down 92% 100%
Kirkby in Ashfield Sewage Treatment
Storm tank at sewage works
Sewage works
Kirkby In Ashfield Sewage Treatment
Company site name
KIRKBY IN ASHFIELD STW (SSTO)
EA ID / permit
SVT01293 · T/61/45171/R
Outlet location
SK4838054880 (OS grid reference) · View on Apple Maps
WFD catchment
Erewash from Source to Nethergreen Brook (GB104028052740)
2024 spills / hours
55 / 287
Long-term average
57.0 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 306 hours spilling →
River Erewash 45 306 down 18% 100%
Great Washbourne STW
Storm tank at sewage works
Sewage works
Great Washbourne
Company site name
GREAT WASHBOURNE IPS (CSO & EO)
EA ID / permit
SVT00999 · S/17/26193/R
Outlet location
SO9835434428 (OS grid reference) · View on Apple Maps
WFD catchment
Carrant Bk - source to conf R Avon (GB109054039851)
2024 spills / hours
128 / 1,088
Long-term average
56.8 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 306 hours spilling →
Tributary of Carrant Brook 33 306 down 74% 97%
Heanor-Milnhay STW
Storm tank at sewage works
Sewage works
Heanor Milnhay
Company site name
HEANOR - MILNHAY STW (SSTO)
EA ID / permit
SVT01571 · T/61/45098/R
Outlet location
SK4572046380 (OS grid reference) · View on Apple Maps
WFD catchment
Erewash from Nethergreen Brook to Gilt Brook (GB104028052511)
2024 spills / hours
80 / 786
Long-term average
62.6 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
Operational improvement completed
Volume & pollution
Estimate from 305 hours spilling →
River Erewash 38 305 down 53% 91%
Broughton Astley STW
Storm tank at sewage works
Sewage works
Broughton Astley
Company site name
BROUGHTON ASTLEY STW (SSTO)
EA ID / permit
SVT00393 · T/50/45321/R
Outlet location
SP5248994801 (OS grid reference) · View on Apple Maps
WFD catchment
Soar from Soar Brook to Thurlaston Brook (GB104028042620)
2024 spills / hours
80 / 902
Long-term average
50.2 spills a year (monitored since 2021)
Investigation
UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement ongoing
Volume & pollution
Estimate from 304 hours spilling →
Broughton Astley Brook 29 304 down 64% 99%
Caudlewell Pumping Station
Storm discharge at pumping station
Company site name
SHIPSTON-ON-STOUR - CAUDLE WELL PS (CSO)
EA ID / permit
SVT00499 · S/14/23238/O
Outlet location
SP2628041170 (OS grid reference) · View on Apple Maps
WFD catchment
Stour - conf Nethercote Bk to conf Back Bk (GB109054039922)
2024 spills / hours
51 / 538
Long-term average
20.7 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 304 hours spilling →
River Stour 29 304 down 43% 99%
Scunthorpe - South Grange CSO
Overflow on sewer network
Company site name
SCUNTHORPE - SOUTH GRANGE (CSO)
EA ID / permit
SVT01968 · T/81/12307/O
Outlet location
SE9141907790 (OS grid reference) · View on Apple Maps
WFD catchment
Bottesford Beck Catchment (trib of Trent) (GB104028064290)
2024 spills / hours
22 / 54
Long-term average
32.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
UWWTR improvement completed, Operational improvement completed
Volume & pollution
Estimate from 302 hours spilling →
Bottesford Beck 26 302 up 18% 100%
Mile Oak STW
Storm tank at sewage works
Sewage works
Mile Oak
Company site name
MILE OAK STW (SSTO)
EA ID / permit
SVT01737 · S/01/55211/R
Outlet location
SJ3001727240 (OS grid reference) · View on Apple Maps
WFD catchment
Morda - source to conf unnamed trib (GB109054055070)
2024 spills / hours
85 / 1,016
Long-term average
86.6 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 302 hours spilling →
River Morda 40 302 down 53% 100%
Dungeley Hill CSO
Overflow on sewer network
Company site name
NETHER HEAGE - DUNGLEY HILL (CSO)
EA ID / permit
SVT00806 · T/41/46044/O
Outlet location
SK3645850625 (OS grid reference) · View on Apple Maps
WFD catchment
Amber from Alfreton Brook to Derwent (GB104028052330)
2024 spills / hours
53 / 432
Long-term average
41.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 302 hours spilling →
Downmeadow Brook 45 302 down 15% 100%
Tickhill Sewage Treatment Works
Storm tank at sewage works
Sewage works
Tickhill
Company site name
TICKHILL STW (SSTO)
EA ID / permit
SVT02318 · T/83/45915/R
Outlet location
SK6019593636 (OS grid reference) · View on Apple Maps
WFD catchment
Torne from Ruddle to St Catherine's Well Stream (GB104028058400)
2024 spills / hours
79 / 319
Long-term average
69.2 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 301 hours spilling →
Slutwell Stream 77 301 down 3% 100%
Cossall Combined Sewer Overflow
Storm discharge at pumping station
Company site name
COSSALL - ILKESTON JUNCTION (SSO)
EA ID / permit
SVT00638 · T/61/00483/O
Outlet location
SK4738842162 (OS grid reference) · View on Apple Maps
WFD catchment
Erewash from Gilt Brook to Trent (GB104028052480)
2024 spills / hours
53 / 659
Long-term average
40.4 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
Operational improvement completed
Volume & pollution
Estimate from 300 hours spilling →
River Erewash 37 300 down 30% 99%
CSO @ Darley Bridge Pumping Station
Storm discharge at pumping station
Company site name
DARLEY DALE - DARLEY BRIDGE PS (CSO)
EA ID / permit
SVT00700 · EPRKB3593EV
Outlet location
SK2715061974 (OS grid reference) · View on Apple Maps
WFD catchment
Derwent from Wye to Amber (GB104028052390)
2024 spills / hours
48 / 186
Long-term average
58.6 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement ongoing
Volume & pollution
Estimate from 299 hours spilling →
River Derwent 63 299 up 31% 100%
Kirk Hallam - Western Outfall Tank (SSO)
Storm discharge at pumping station
EA ID / permit
SVT01286 · Permit application submitted
Outlet location
SK4622040326 (OS grid reference) · View on Apple Maps
WFD catchment
Nut Brook Catchment (trib of Erewash) (GB104028052520)
2024 spills / hours
31 / 385
Long-term average
36.7 spills a year (monitored since 2023)
Investigation
UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 298 hours spilling →
Nut Brook 24 298 down 23% 100%
East Leake (Gotham Road) TPS
Storm discharge at pumping station
Company site name
EAST LEAKE - GOTHAM ROAD PS (CSO)
EA ID / permit
SVT00823 · EPRHB3690AU
Outlet location
SK5558926457 (OS grid reference) · View on Apple Maps
WFD catchment
Kingston Brook Catchment (Trib of Soar) (GB104028046600)
2024 spills / hours
82 / 903
Long-term average
49.4 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 297 hours spilling →
Kingston Brook 41 297 down 50% 100%
Green Lane Pumping Station
Storm discharge at pumping station
Company site name
ALVASTON - GREEN LANE (CSO)
EA ID / permit
SVT01002 · T/48/45135/O
Outlet location
SK4043033870 (OS grid reference) · View on Apple Maps
WFD catchment
Derwent from Bottle Brook to Trent (GB104028053240)
2024 spills / hours
72 / 671
Long-term average
47.8 spills a year (monitored since 2022)
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 295 hours spilling →
River Derwent 53 295 down 26% 99%
Langham STW
Storm tank at sewage works
Sewage works
Langham
Company site name
LANGHAM (STW)
EA ID / permit
SVT01314 · T/54/45998/R
Outlet location
SK8478011440 (OS grid reference) · View on Apple Maps
WFD catchment
Langham Brook from Source to Whissendine Brook (GB104028047520)
2024 spills / hours
43 / 743
Long-term average
20.4 spills a year (monitored since 2021)
Investigation
UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 294 hours spilling →
Langham Brook 28 294 down 35% 100%
Donington-Le-Heath Townsend Ln CSO
Overflow on sewer network
Company site name
DONINGTON LE HTH - OFF TOWNSEND LN (CSO)
EA ID / permit
SVT00778 · T/20/35156/O
Outlet location
SK4184312201 (OS grid reference) · View on Apple Maps
WFD catchment
Sence from Source to Ibstock Brook (GB104028046750)
2024 spills / hours
135 / 1,284
Long-term average
140.4 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 294 hours spilling →
River Sence 74 294 down 45% 99%
Tenbury Sewage Treatment Works
Storm tank at sewage works
Sewage works
Tenbury
Company site name
TENBURY STW (SSTO)
EA ID / permit
SVT02278 · S/09/55831/R
Outlet location
SO6034468613 (OS grid reference) · View on Apple Maps
WFD catchment
Teme - conf R Onny to conf R Severn (GB109054044510)
2024 spills / hours
133 / 1,241
Long-term average
104.5 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 292 hours spilling →
River Teme 44 292 down 67% 100%
Measham Pumping Station
Storm discharge at pumping station
Company site name
MEASHAM (SSO)
EA ID / permit
SVT01530 · T/23/36411/O
Outlet location
SK3231011810 (OS grid reference) · View on Apple Maps
WFD catchment
Mease from Gilwiskaw Bk to Hooborough Brook (GB104028046570)
2024 spills / hours
43 / 360
Long-term average
38.8 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 291 hours spilling →
River Mease 28 291 down 35% 100%
Hilton - Eggington Road SPS
Storm discharge at pumping station
Company site name
HILTON - EGGINGTON ROAD (CSO)
EA ID / permit
SVT01139 · T/33/30011/O
Outlet location
SK2562529558 (OS grid reference) · View on Apple Maps
WFD catchment
Hilton Bk (trib of R Dove) (GB104028052870)
2024 spills / hours
51 / 715
Long-term average
36.2 spills a year (monitored since 2021)
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 290 hours spilling →
Tributary of Hilton Brook 20 290 down 61% 100%
Ashley Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Ashley
Company site name
ASHLEY WORKS STW (CSO)
EA ID / permit
SVT00126 · T/02/36078/R
Outlet location
SJ7710136108 (OS grid reference) · View on Apple Maps
WFD catchment
Chatcull Brook from Source to Meece Brook (GB104028053050)
2024 spills / hours
84 / 414
Long-term average
76.0 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 288 hours spilling →
Chatcull Brook 71 288 down 15% 100%
Northend STW
Inlet overflow at sewage works (with treatment)
Sewage works
Northend
Company site name
NORTHEND STW (CSO)
EA ID / permit
SVT01669 · S/13/25874/R
Outlet location
SP3898153065 (OS grid reference) · View on Apple Maps
WFD catchment
Dene - source to Butlers Marston (GB109054039501)
Treatment
Reed bed
2024 spills / hours
203 / 2,371
Long-term average
182.8 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 288 hours spilling →
Tributary of River Dene 84 288 down 59% 98%
Trent Vale SPS
Storm discharge at pumping station
Company site name
TRENT VALE PS (CSO)
EA ID / permit
SVT02340 · T/01/36007/O
Outlet location
SJ8643042240 (OS grid reference) · View on Apple Maps
WFD catchment
Trent from Fowlea Brook to Tittensor (GB104028053271)
2024 spills / hours
53 / 566
Long-term average
53.1 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 287 hours spilling →
River Trent 31 287 down 42% 100%
Creswell Sewage Treatment Works
Storm tank at sewage works
Sewage works
Creswell
Company site name
CRESWELL (STW)
EA ID / permit
SVT00678 · T/73/45605/R
Outlet location
SK5369074319 (OS grid reference) · View on Apple Maps
WFD catchment
Millwood Brook Catchment (trib of Poulter) (GB104028058150)
2024 spills / hours
113 / 875
Long-term average
79.5 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 286 hours spilling →
A Tributary of Millwood Brook 59 286 down 48% 100%
Hurley Sewage Treatment Works
Storm tank at sewage works
Sewage works
Hurley
Company site name
HURLEY STW (SSTO)
EA ID / permit
SVT01197 · T/16/35777/R
Outlet location
SP2351096590 (OS grid reference) · View on Apple Maps
WFD catchment
Tame from R Blythe to River Anker (GB104028046440)
2024 spills / hours
116 / 1,931
Long-term average
77.5 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 281 hours spilling →
Tributary of River Tame 41 281 down 65% 96%
Alkborough STW
Inlet overflow at sewage works
Sewage works
Alkborough
Company site name
ALKBOROUGH STW 6DWF (CSO)
EA ID / permit
SVT00051 · T/81/45466/R
Outlet location
SE8791922121 (OS grid reference) · View on Apple Maps
WFD catchment
Humber estuary TRaC (GB530402609203)
2024 spills / hours
44 / 153
Long-term average
52.2 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 279 hours spilling →
Tributary of River Humber 57 279 up 30% 100%
Codsall Sewage Treatment Works
Storm tank at sewage works
Sewage works
Codsall
Company site name
CODSALL STW (SSTO)
EA ID / permit
SVT00601 · T/03/35861/R
Outlet location
SJ8839603742 (OS grid reference) · View on Apple Maps
WFD catchment
Penk from Source toSaredon Brook (GB104028046680)
2024 spills / hours
79 / 688
Long-term average
48.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 267 hours spilling →
The Bilbrook 30 267 down 62% 99%
Watersmeet SPS
Storm discharge at pumping station
Company site name
HARTPURY - WATERSMEET (CSO)
EA ID / permit
SVT02471 · S/21/08947/O
Outlet location
SO7986325961 (OS grid reference) · View on Apple Maps
WFD catchment
Leadon - conf Preston Bk to conf R Severn (W Channel) (GB109054032511)
2024 spills / hours
32 / 401
Long-term average
36.9 spills a year (monitored since 2019)
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 267 hours spilling →
Colliers Brook 21 267 down 34% 100%
Hampton in Arden - Meriden Road SPS
Storm discharge at pumping station
Company site name
HAMPTON IN ARDEN - MERIDEN ROAD (SSO)
EA ID / permit
SVT01031 · T/11/02501/O
Outlet location
SP2146281249 (OS grid reference) · View on Apple Maps
WFD catchment
Blythe from Patrick Bridge to R Tame (GB104028042572)
2024 spills / hours
77 / 840
Long-term average
67.4 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 264 hours spilling →
Tributary River Blythe 38 264 down 51% 100%
Sudbury Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Sudbury
Company site name
SUDBURY STW (CSO)
EA ID / permit
SVT02244 · T/33/35620/R
Outlet location
SK1599231861 (OS grid reference) · View on Apple Maps
WFD catchment
Dove - R Churnet to R Trent (GB104028052420)
2024 spills / hours
59 / 424
Long-term average
115.5 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 263 hours spilling →
Tributary of River Dove 41 263 down 31% 99%
Bowers Hall CSO
Overflow on sewer network
Company site name
STANTON IN PEAK - BOWERS HALL (CSO)
EA ID / permit
SVT00315 · T/39/45884/O
Outlet location
SK2351365085 (OS grid reference) · View on Apple Maps
WFD catchment
Lathkill from Bradford to Wye (GB104028053460)
2024 spills / hours
124 / 1,728
Long-term average
91.8 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation completed, Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 262 hours spilling →
River Lathkill 54 262 down 56% 99%
Cam - Draycott CSO
Overflow on sewer network
Company site name
CAM - DRAYCOTT (M/H 9) (CSO)
EA ID / permit
SVT00458 · S/20/06015/O
Outlet location
SO7499601285 (OS grid reference) · View on Apple Maps
WFD catchment
The Cam R source to conf Glos and Sharpness Canal (GB109054026550)
2024 spills / hours
126 / 853
Long-term average
83.6 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation completed, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 262 hours spilling →
River Cam 44 262 down 65% 100%
Huthwaite Sewage Treatment Works
Inlet overflow at sewage works
Sewage works
Huthwaite
Company site name
HUTHWAITE STW (CSO)
EA ID / permit
SVT01198 · T/41/45831/R
Outlet location
SK4682958180 (OS grid reference) · View on Apple Maps
WFD catchment
Alfreton Brook from Source to Westwood Brook (GB104028052350)
2024 spills / hours
87 / 402
Long-term average
102.2 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 261 hours spilling →
Nunn Brook 67 261 down 23% 100%
Hallow STW
Storm tank at sewage works
Sewage works
Hallow
Company site name
HALLOW STW (SSTO)
EA ID / permit
SVT01028 · S/09/55973/R
Outlet location
SO8247657455 (OS grid reference) · View on Apple Maps
WFD catchment
Laughern Bk - source to conf R Teme (GB109054044380)
2024 spills / hours
66 / 327
Long-term average
46.6 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
Operational improvement completed
Volume & pollution
Estimate from 259 hours spilling →
Laughern Brook 33 259 down 50% 100%
Whetstone Wastewater Treatment Wrks
Storm tank at sewage works
Sewage works
Whetstone Wastewater Treatment Wrks
Company site name
WHETSTONE STW (SSTO & EO)
EA ID / permit
SVT02535 · T/50/45829/R
Outlet location
SP5558098220 (OS grid reference) · View on Apple Maps
WFD catchment
Sence from Countesthorpe Brook to Soar (GB104028046870)
2024 spills / hours
66 / 900
Long-term average
43.4 spills a year (monitored since 2021)
Investigation
UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 255 hours spilling →
River Sence 19 255 down 71% 100%
South Wingfield - Holm Lane SPS
Storm discharge at pumping station
Company site name
SOUTH WINGFIELD - HOLM LANE (SSO)
EA ID / permit
SVT02114 · T/41/07222/R
Outlet location
SK3825955722 (OS grid reference) · View on Apple Maps
WFD catchment
Amber from Alfreton Brook to Derwent (GB104028052330)
2024 spills / hours
25 / 198
Long-term average
40.8 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 254 hours spilling →
River Amber 28 254 up 12% 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.