Storm overflow register · 2025 annual return

United Utilities storm overflows, 2025

United Utilities reported 2,270 storm overflows in England for 2025. Together they recorded 60,843 spills over 327,452 hours, an average of 26.8 spills per overflow against 20.4 across England. That ranks 9 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 23% on 2024.

295 overflows did not spill · 313 spilled more than 60 times · 2,076 had monitors working for 90% of the year or more · 289 sewage treatment works with overflows

Hours spilling by month, 2025

025k50k75k100kJan 2025: 69,814 hours spillingJanFeb 2025: 7,561 hours spillingFebMar 2025: 1,763 hours spillingMarApr 2025: 484 hours spillingAprMay 2025: 4,089 hours spillingMayJun 2025: 13,148 hours spillingJunJul 2025: 6,622 hours spillingJulAug 2025: 2,053 hours spillingAugSep 2025: 41,625 hours spillingSepOct 2025: 22,376 hours spillingOctNov 2025: 71,264 hours spillingNovDec 2025: 86,587 hours spillingDec
Hours spilling, all United Utilities overflows, from the start/stop records. Spills running across a month end are split between the months.

All United Utilities 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
Lancaster Street CSO 432CD
Overflow on sewer network
Company site name
Lancaster Street CSO
EA ID / permit
UUP01102 · 016982666
Outlet location
SJ9029090670 (OS grid reference) · View on Apple Maps
WFD catchment
Goyt (Etherow to Mersey) (GB112069061000)
2024 spills / hours
0 / 0.0
Long-term average
2.4 spills a year (monitored since 2019)
Monitor below 90%
Sensor failure / issue · Resolved - Apr
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
River Goyt via SWS 1 1.0 up from 0 89%
Beech Grove CSO
Overflow on sewer network
Company site name
Beech Grove CSO
EA ID / permit
UUP00210 · 01SAL0059
Outlet location
SD7155703039 (OS grid reference) · View on Apple Maps
WFD catchment
Astley Brook (Mersey) (GB112069061100)
2024 spills / hours
4 / 1.6
Long-term average
4.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Trib Honksford Brook via SWS 2 1.0 down 50% 99%
Tbc
Overflow on sewer network
Company site name
Moorside Primary School CSO (379CM)
EA ID / permit
UUP02227 · Permit applied for
Outlet location
SD7698601231 (OS grid reference) · View on Apple Maps
WFD catchment
Folly Brook and Salteye Brook (GB112069061430)
2024 spills / hours
4 / 4.3
Long-term average
4.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Folly Brook and Salteye Brook. 4 1.0 no change 99%
Wargrave Road CSO
Overflow on sewer network
Company site name
Wargrave Road CSO
EA ID / permit
UUP02018 · NPSWQD004566
Outlet location
SJ5901194760 (OS grid reference) · View on Apple Maps
WFD catchment
Millingford (Newton) Brook (GB112069061220)
2024 spills / hours
7 / 1.0
Long-term average
6.0 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.0 hours spilling →
Newton Brook 5 1.0 down 29% 85%
Bridge Lane Quayside CSO
Overflow on sewer network
Company site name
Bridge Lane
EA ID / permit
UUP00315 · 016881727
Outlet location
SJ5296078430 (OS grid reference) · View on Apple Maps
WFD catchment
Weaver (Dane to Frodsham) (GB112068060500)
2024 spills / hours
10 / 2.9
Long-term average
9.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
River Weaver 7 1.0 down 30% 100%
Waterloo Road CSO (202ZW)
Overflow on sewer network
Company site name
Waterloo Road Sewer
EA ID / permit
UUP02046 · 016820393
Outlet location
SJ5097683276 (OS grid reference) · View on Apple Maps
WFD catchment
Manchester Ship Canal (GB71210004)
2024 spills / hours
9 / 1.9
Long-term average
7.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Manchester Ship Canal 5 1.0 down 44% 100%
St Marys Rd Combined Sewer Overflow
Overflow on sewer network
Company site name
CSO opposite No. XX St Mary's Road
EA ID / permit
UUP01825 · 016993589
Outlet location
SK0311093940 (OS grid reference) · View on Apple Maps
WFD catchment
Glossop (Shelf) Brook (Source to Long Clough Brook) (GB112069060730)
2024 spills / hours
3 / 0.4
Long-term average
7.2 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Glossop Brook 3 1.0 no change 100%
Ribblesdale Drive PS
Storm discharge at pumping station
Company site name
Ribblesdale Drive PS
EA ID / permit
UUP01648 · 017280304
Outlet location
SD4876051400 (OS grid reference) · View on Apple Maps
WFD catchment
Cocker (Lune) (GB112072065880)
2024 spills / hours
1 / 0.6
Long-term average
2.0 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Nov
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Trib River Cocker 3 0.9 up 200% 81%
Hassall Rd Crewe Rd CSO 131QJ
Overflow on sewer network
Company site name
HASSALL ROAD / CREWE ROAD CSO
EA ID / permit
UUP00911 · 01CON0022
Outlet location
SJ7878155326 (OS grid reference) · View on Apple Maps
WFD catchment
Valley Brook (Source to Englesea Brook) (GB112068074630)
2024 spills / hours
3 / 1.5
Long-term average
2.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Valley Brook 4 0.9 up 33% 100%
Milnrow Road/Pine Street CSO
Overflow on sewer network
Company site name
Milnrow Road/Pine Street
EA ID / permit
UUP01325 · EPRSB3396VR
Outlet location
SD9050013260 (OS grid reference) · View on Apple Maps
WFD catchment
Roch (Source to Spodden) (GB112069064720)
2024 spills / hours
14 / 3.9
Long-term average
5.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Roch via SWS 5 0.9 down 64% 97%
Wodow Road Combined Sewer Overflow
Overflow on sewer network
Company site name
Wodow Road CSO
EA ID / permit
UUP02157 · 01COP0038
Outlet location
NY0075008871 (OS grid reference) · View on Apple Maps
WFD catchment
Ehen (lower) (GB112074069980)
Bathing water
St Bees
2024 spills / hours
3 / 0.6
Long-term average
5.5 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Ehen 5 0.9 up 67% 100%
Hill Street CSO
Overflow on sewer network
Company site name
Hill Street CSO
EA ID / permit
UUP00967 · 017190786
Outlet location
SD7654026610 (OS grid reference) · View on Apple Maps
WFD catchment
Hyndburn (GB112071065040)
2024 spills / hours
3 / 0.9
Long-term average
6.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Woodnook Water 1 0.9 down 67% 99%
Winstanley Road Pumping Station
Storm discharge at pumping station
Company site name
Winstanley Road PS
EA ID / permit
UUP02149 · 017020090
Outlet location
SD5327003840 (OS grid reference) · View on Apple Maps
WFD catchment
Smithy Brook (GB112070061600)
2024 spills / hours
1 / 0.1
Long-term average
2.1 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Smithy Brook 1 0.9 no change 100%
Dantzic Street CSO
Overflow on sewer network
Company site name
Dantzic Street CSO
EA ID / permit
UUP00612 · 016982951
Outlet location
SJ8465099560 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
5 / 3.1
Long-term average
2.9 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Irk 1 0.9 down 80% 97%
Link Road Combined Sewer Overflow
Overflow on sewer network
Company site name
LINK ROAD CSO
EA ID / permit
UUP01150 · 01KNW0009
Outlet location
SJ4580090090 (OS grid reference) · View on Apple Maps
WFD catchment
Prescot Brook (Logwood Mill Brook) (GB112069060710)
2024 spills / hours
12 / 8.2
Long-term average
8.7 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Logwood Mill Brook via SWS 3 0.9 down 75% 100%
Dumplington Circle
Overflow on sewer network
Company site name
Dumplington Circle CSO
EA ID / permit
UUP00667 · 016982695
Outlet location
SJ7667097560 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell / Manchester Ship Canal (Irk to confluence with Upper Mersey) (GB112069061452)
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Manchester Ship Canal 2 0.9 up from 0 91%
Glynrene Drive CSO
Overflow on sewer network
Company site name
Glynrene Drive CSO
EA ID / permit
UUP00812 · EPRSB3397WJ
Outlet location
SD7598002460 (OS grid reference) · View on Apple Maps
WFD catchment
Folly Brook and Salteye Brook (GB112069061430)
2024 spills / hours
1 / 0.2
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Trib of Kempnough Brook Vi SWS 2 0.9 up 100% 96%
Queens Road/Scorpton Street CSO
Overflow on sewer network
Company site name
Queens Road/Scorpton Street CSO
EA ID / permit
UUP01598 · 016982952
Outlet location
SD8574000500 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
2 / 1.0
Long-term average
2.5 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Culverted Section Moston Brook 3 0.9 up 50% 100%
Rochdale Rd/Alfred St CSO
Overflow on sewer network
Company site name
Rochdale Road/Alfreton Street CSO
EA ID / permit
UUP01671 · 016993737
Outlet location
SD8542001801 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
6 / 2.3
Long-term average
10.2 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
The River Irk 5 0.9 down 17% 92%
Castleton Avenue CSO 451IU
Overflow on sewer network
Company site name
Castleton Avenue CSO
EA ID / permit
UUP00424 · 016940192
Outlet location
SJ7878095380 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell / Manchester Ship Canal (Irk to confluence with Upper Mersey) (GB112069061452)
2024 spills / hours
2 / 1.6
Long-term average
10.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Longford Brook Trib Ship Canal 3 0.9 up 50% 100%
St Pauls Road CSO 332TX PRE0006
Overflow on sewer network
Company site name
St Paul's Road combined sewer overflow (332TX) (PRE0006)
EA ID / permit
UUP01832 · 017190769
Outlet location
SD5196329367 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE - transitional (GB531207112400)
Shellfish water
Ribble
2024 spills / hours
2 / 0.6
Long-term average
81.6 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Ribble 3 0.9 up 50% 94%
Gower St/Kings Dock CSO
Overflow on sewer network
Company site name
Gower Street/Kings Dock CSO
EA ID / permit
UUP00821 · 016930975
Outlet location
SJ3400089700 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY - Transitional (GB531206908100)
2024 spills / hours
5 / 2.0
Long-term average
9.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
Mersey Estuary 4 0.8 down 20% 100%
Audley Rd/Talke Rd Junction CSO
Overflow on sewer network
Company site name
Audley Road and Talke Road Junction CSO
EA ID / permit
UUP00157 · EPRQB3499WS
Outlet location
SJ7996755137 (OS grid reference) · View on Apple Maps
WFD catchment
Valley Brook (Source to Englesea Brook) (GB112068074630)
2024 spills / hours
9 / 5.6
Long-term average
35.5 spills a year (monitored since 2020)
Monitor below 90%
Access - Unable to retrieve data from non-telemetry data logger · Resolved - Aug
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 0.8 hours spilling →
Trib Valley Brook via SWS 2 0.8 down 78% 43%
Riverside Road CSO
Overflow on sewer network
Company site name
Riverside Road CSO
EA ID / permit
UUP01663 · 017160299
Outlet location
SD5307028190 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE - transitional (GB531207112400)
Bathing water
Southport; St Annes; St. Annes North; Blackpool South
Shellfish water
Ribble
2024 spills / hours
2 / 1.0
Long-term average
4.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
River Ribble (Tidal) 1 0.8 down 50% 94%
Redearth Road/Sudell Road CSO
Overflow on sewer network
Company site name
REDEARTH ROAD / SUDELL ROAD CSO
EA ID / permit
UUP01641 · 01BBN0124
Outlet location
SD6935022090 (OS grid reference) · View on Apple Maps
WFD catchment
Darwen - headwaters to conf Davy Field Bk (GB112071065240)
2024 spills / hours
2 / 0.2
Long-term average
10.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
River Darwen 3 0.8 up 50% 100%
K Shoes CSO 042B6
Overflow on sewer network
Company site name
K. Shoes, CSO
EA ID / permit
UUP01046 · 01BRW0056
Outlet location
SD2144077990 (OS grid reference) · View on Apple Maps
WFD catchment
Duddon Sands (GB641211172000)
2024 spills / hours
3 / 0.9
Long-term average
11.9 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
Blea Beck 5 0.8 up 67% 97%
Halsbury Street CSO 331XR
Overflow on sewer network
Company site name
Halsbury Street CSO
EA ID / permit
UUP00886 · 01PRE0072
Outlet location
SD5461028960 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE_Transitional (GB531207112400)
2024 spills / hours
46 / 426
Long-term average
12.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
Swillbrook Clvrt Trib R Ribble 3 0.8 down 93% 100%
Lord Street
Overflow on sewer network
Company site name
Lord Street CSO
EA ID / permit
UUP01186 · 016993630
Outlet location
SD6142003680 (OS grid reference) · View on Apple Maps
WFD catchment
Hey/Borsdane Brook (GB112069064520)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Borsdane Brook 1 0.7 up from 0 100%
Chapel Lane
Overflow on sewer network
Company site name
Chapel Lane CSO
EA ID / permit
UUP00445 · 01TRA0016
Outlet location
SJ7919085550 (OS grid reference) · View on Apple Maps
WFD catchment
Bollin (River Dean to Ashley Mill) (GB112069061381)
2024 spills / hours
1 / 0.2
Long-term average
1.5 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Nov
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Bollin 2 0.7 up 100% 70%
Firs Lane/Urmston Street CSO
Overflow on sewer network
Company site name
FIRS LANE / URMSTON STREET CSO
EA ID / permit
UUP00737 · 01WIG0066
Outlet location
SD6482000240 (OS grid reference) · View on Apple Maps
WFD catchment
Westleigh Brook (GB112069060820)
2024 spills / hours
3 / 0.6
Long-term average
2.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Westleigh Brook 2 0.7 down 33% 100%
Stanley Avenue/Green Lane CSO
Overflow on sewer network
Company site name
Stanley Green Avenue/Green Lane CSO
EA ID / permit
UUP01842 · 016881737
Outlet location
SJ2902092720 (OS grid reference) · View on Apple Maps
WFD catchment
The Birket including Arrowe Brook and Fender (GB112068060530)
Bathing water
Wallasey
2024 spills / hours
6 / 2.0
Long-term average
6.5 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Bidston Stream a trib of the River Birket 3 0.7 down 50% 99%
Ulverston WwTW
Inlet overflow at sewage works
Sewage works
Ulverston
Company site name
ULVERSTON WwTW
EA ID / permit
UUP01978 · 017370179
Outlet location
SD3071077240 (OS grid reference) · View on Apple Maps
WFD catchment
Dragley Beck (GB112073071160)
Bathing water
Morecambe North; Morecambe South
2024 spills / hours
9 / 1.3
Long-term average
17.7 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Carter Pool 3 0.7 down 67% 100%
Kingfisher Way CSO
Overflow on sewer network
Company site name
Kingfisher Way CSO
EA ID / permit
UUP01068 · 016892442
Outlet location
SJ2554088920 (OS grid reference) · View on Apple Maps
WFD catchment
The Birket including Arrowe Brook and Fender (GB112068060530)
Bathing water
Meols
Shellfish water
North Wirral (West)
2024 spills / hours
1 / 0.2
Long-term average
4.2 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Arrowe Brook 1 0.7 no change 100%
Cromwell Road/Lichfield Street CSO
Overflow on sewer network
Company site name
CROMWELL ROAD / LICHFIELD STREET CSO
EA ID / permit
UUP00569 · 01SAL0028
Outlet location
SD8210000300 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
5 / 0.6
Long-term average
10.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Irwell 5 0.7 no change 100%
Glenbrook Rd Exter Rd CSO 281VU
Overflow on sewer network
Company site name
Glenbrook Road/Dexter Road CSO
EA ID / permit
UUP00806 · 01MAN0125
Outlet location
SD8415004420 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
12 / 4.8
Long-term average
15.0 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Irk 7 0.7 down 42% 92%
Mh Y6 Havelock Road CSO
Overflow on sewer network
Company site name
MH Y6 Havelock Road CSO
EA ID / permit
UUP01291 · 017060092
Outlet location
SD5615025440 (OS grid reference) · View on Apple Maps
WFD catchment
Lostock US Farington Weir (GB112070064911)
2024 spills / hours
27 / 449
Long-term average
16.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Lostock 5 0.7 down 81% 95%
Lune Street Pumping Station 25030
Storm discharge at pumping station
Company site name
Lune Street Sewage PS
EA ID / permit
UUP01211 · 017270195
Outlet location
SD4757062170 (OS grid reference) · View on Apple Maps
WFD catchment
LUNE (GB531207212100)
Bathing water
Morecambe North
Shellfish water
Morecambe Bay East
2024 spills / hours
7 / 11
Long-term average
8.3 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Lune (Estuarine Waters) 2 0.7 down 71% 99%
Mather Lane
Overflow on sewer network
Company site name
Mather Lane CSO
EA ID / permit
UUP01262 · 01WIG0080
Outlet location
SJ6581099001 (OS grid reference) · View on Apple Maps
WFD catchment
Pennington Brook (Glaze) (GB112069060760)
2024 spills / hours
1 / 0.4
Long-term average
1.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Pennington Brook 2 0.7 up 100% 100%
Rear 23 Liverpool Road North CSO
Overflow on sewer network
Company site name
Rear 23 Liverpool Road North CSO
EA ID / permit
UUP01618 · 016997082
Outlet location
SD3685002290 (OS grid reference) · View on Apple Maps
WFD catchment
Alt US Bull Bridge (GB112069061441)
2024 spills / hours
5 / 0.9
Long-term average
4.0 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Jul
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Maghull Brook 3 0.7 down 40% 82%
Tbc
Overflow on sewer network
Company site name
94 North Row CSO (049KS)
EA ID / permit
UUP02250 · Permit applied for
Outlet location
SD2224569445 (OS grid reference) · View on Apple Maps
WFD catchment
Mill Beck (Poaka Beck) (GB112074069790)
2024 spills / hours
5 / 9.8
Long-term average
4.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Mill Beck 3 0.7 down 40% 97%
Cumcatch / Milton West PS
Storm discharge at pumping station
Company site name
Cumcatch (Milton West) PS
EA ID / permit
UUP01327 · 017680320
Outlet location
NY5479060870 (OS grid reference) · View on Apple Maps
WFD catchment
Quarry Beck (GB102076074050)
2024 spills / hours
4 / 5.5
Long-term average
4.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Milton Beck 2 0.7 down 50% 100%
Moorbrook Street CSO 332F2
Overflow on sewer network
Company site name
MOORBROOK STREET CSO
EA ID / permit
UUP01337 · PRE0023
Outlet location
SD5354930499 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE_Transitional (GB531207112400)
2024 spills / hours
2 / 0.9
Long-term average
12.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Chain Caul Culvert Into Ribble 3 0.7 up 50% 100%
Lennox Gate Pumping Station
Storm discharge at pumping station
Company site name
Lennox Gate PS
EA ID / permit
UUP01132 · 017180567
Outlet location
SD2928632503 (OS grid reference) · View on Apple Maps
WFD catchment
Main Drain (Ribble) (GB112071065651)
Bathing water
Blackpool South
2024 spills / hours
5 / 3.7
Long-term average
16.2 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Irish Sea 1 0.7 down 80% 100%
Morris Street CSO (BRY0137)
Overflow on sewer network
Company site name
Morris Street CSO
EA ID / permit
UUP01344 · EPRJB3893EY
Outlet location
SD8009308224 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Rossendale STW to Roch) (GB112069064620)
2024 spills / hours
0 / 0.0
Long-term average
2.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
River Irwell 5 0.6 up from 0 100%
3-8 Morningside CSO 3282GE
Overflow on sewer network
Company site name
3/8 Morningside CSO
EA ID / permit
UUP00040 · 016983112
Outlet location
SJ3332099130 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY MOUTH - transitional (GB641211630001)
2024 spills / hours
2 / 0.5
Long-term average
5.8 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Rimrose Brook, Trib Rvr Mersey 2 0.6 no change 100%
Derby Rd Barrows Lane CSO 203DC
Overflow on sewer network
Company site name
Derby Road/Barrows Green Lane
EA ID / permit
UUP00634 · 016920641
Outlet location
SJ5355087980 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY - Transitional (GB531206908100)
2024 spills / hours
1 / 2.8
Long-term average
22.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Barrows Green Brook SWS 2 0.6 up 100% 99%
Oxford Street/Ainslie Street CSO
Overflow on sewer network
Company site name
Oxford Street/Ainsley Street CSO
EA ID / permit
UUP01499 · 017480304
Outlet location
SD1966070553 (OS grid reference) · View on Apple Maps
WFD catchment
Furness Permo-Triassic sandstone aquifers (GB41201G101900)
Bathing water
Walney West Shore
Shellfish water
Walney
2024 spills / hours
8 / 4.1
Long-term average
22.2 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 0.6 hours spilling →
Ormsgill Reservoir 7 0.6 down 13% 97%
Dorchester Rd Adj No 182 Manch CSO
Overflow on sewer network
Company site name
Dorchester Rd, adj 182 Manchester Rd
EA ID / permit
UUP00650 · 016982744
Outlet location
SD7770000620 (OS grid reference) · View on Apple Maps
WFD catchment
Folly Brook and Salteye Brook (GB112069061430)
2024 spills / hours
0 / 0.0
Long-term average
0.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Trib Folly Brook via SWS 2 0.6 up from 0 97%
Mill Cottages CSO
Overflow on sewer network
EA ID / permit
UUP01305 · 01COP0024
Outlet location
NY0092023860 (OS grid reference) · View on Apple Maps
WFD catchment
Lowca Beck (GB112074070040)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Distington Beck 1 0.6 up from 0 100%
Halls Road CSO (411XQ)
Overflow on sewer network
Company site name
Halls Road CSO
EA ID / permit
UUP00885 · 016810193
Outlet location
SJ8858058380 (OS grid reference) · View on Apple Maps
WFD catchment
Biddulph Brook (GB112068055360)
2024 spills / hours
2 / 0.9
Long-term average
1.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Gillow Shaw, Trib Biddulph Brk 1 0.6 down 50% 100%

Sewage treatment works

Storm tanks and inlet overflows at each United Utilities 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.