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
Crosby on Eden Pumping Station
Storm discharge at pumping station
Company site name
Low Crosby PS
EA ID / permit
UUP00571 · 017680321
Outlet location
NY4458059300 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Eamont to tidal (GB102076073940)
2024 spills / hours
2 / 0.5
Long-term average
0.5 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Eden 0 0.0 down 100% 100%
Culceth Lane CSO
Overflow on sewer network
Company site name
Culcheth Lane CSO
EA ID / permit
UUP00591 · 016982731
Outlet location
SJ8840099430 (OS grid reference) · View on Apple Maps
WFD catchment
Medlock (Lumb Brook to Irwell) (GB112069061152)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Medlock 0 0.0 no change 100%
East Greenfield CSO
Overflow on sewer network
Company site name
East Greenfield CSO
EA ID / permit
UUP00674 · 016982923
Outlet location
SD9929004290 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Chew Brook to Swineshaw Brook) (GB112069061111)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Tame 0 0.0 no change 100%
Edward Street CSO
Overflow on sewer network
EA ID / permit
UUP00694 · 01PEN0005
Outlet location
SD8691039030 (OS grid reference) · View on Apple Maps
WFD catchment
Colne Water - Wanless Water to Pendle Water (GB112071065150)
2024 spills / hours
1 / 0.1
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
Swinden Clough 0 0.0 down 100% 91%
Greave Clough Drive CSO
Overflow on sewer network
Company site name
Greave Clough Drive CSO
EA ID / permit
UUP00845 · 016982934
Outlet location
SD8749023220 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Source to Whitewell Brook) (GB112069064660)
2024 spills / hours
2 / 1.9
Long-term average
0.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Greave Clough via SWS 0 0.0 down 100% 98%
Holt Lane Failsworth SSO
Overflow on sewer network
Company site name
Holt Lane (Failsworth ) SSO
EA ID / permit
UUP00983 · 016982213
Outlet location
SD9028000680 (OS grid reference) · View on Apple Maps
WFD catchment
Medlock (Lumb Brook to Irwell) (GB112069061152)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Lords Brook 0 0.0 no change 100%
Ne Area Sewer
Overflow on sewer network
Company site name
Thursby Road/Basnett Street
EA ID / permit
UUP01368 · 017160194
Outlet location
SD8514033610 (OS grid reference) · View on Apple Maps
WFD catchment
Brun - conf Don to conf Calder (GB112071065100)
2024 spills / hours
1 / 0.1
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
River Burn 0 0.0 down 100% 98%
Rear Garden of 16 Crossings Close
Overflow on sewer network
Company site name
Rear Garden of No.16 Crossings Close
EA ID / permit
UUP01621 · 017480387
Outlet location
NY0114015360 (OS grid reference) · View on Apple Maps
WFD catchment
Keekle (lower) (GB112074070000)
2024 spills / hours
1 / 1.5
Long-term average
0.5 spills a year (monitored since 2024)
Monitor below 90%
Comms failure / issue · Resolved - Nov
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Nor Beck 0 0.0 down 100% 76%
St Bridgets Lane CSO
Overflow on sewer network
Company site name
St Bridgets Lane CSO
EA ID / permit
UUP01814 · 01COP0027
Outlet location
NY0097010620 (OS grid reference) · View on Apple Maps
WFD catchment
Ehen (lower) (GB112074069980)
Bathing water
St Bees
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Culverted section of Skirting Beck (tributary of the River Ehen) 0 0.0 no change 100%
Stockbridge Road CSO (BUR0038)
Overflow on sewer network
Company site name
Stockbridge Road Burnley CSO
EA ID / permit
UUP01860 · EPRJB3895EB
Outlet location
SD7963933472 (OS grid reference) · View on Apple Maps
WFD catchment
Green Brook (GB112071065080)
2024 spills / hours
1 / 0.1
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
Green Brook 0 0.0 down 100% 99%
Warwick on Eden PS
Storm discharge at pumping station
Company site name
Warwick on Eden PS
EA ID / permit
UUP02032 · 017680330
Outlet location
NY4696056660 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Eamont to tidal (GB102076073940)
2024 spills / hours
1 / 0.6
Long-term average
0.5 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
River Eden 0 0.0 down 100% 81%
Wellington Hotel CSO
Overflow on sewer network
EA ID / permit
UUP02069 · 01ROS0017
Outlet location
SD8700023100 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Source to Whitewell Brook) (GB112069064660)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Culverted Trib of River Irwell 0 0.0 no change 100%
Tbc
Overflow on sewer network
Company site name
London Road (Preston) CSO (332C8)
EA ID / permit
UUP02221 · Permit applied for
Outlet location
SD5528528748 (OS grid reference) · View on Apple Maps
WFD catchment
Savick Brook (GB112071065470)
2024 spills / hours
1 / 0.1
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
Savick Brook 0 0.0 down 100% 99%
Clough End Road CSO 441KS
Overflow on sewer network
Company site name
Clough End Road CSO
EA ID / permit
UUP00513 · 01TAM0139
Outlet location
SJ9864094380 (OS grid reference) · View on Apple Maps
WFD catchment
Etherow (Glossop Brook to Goyt) (GB112069061050)
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Hurst Clough Brook 0 0.0 no change 100%
Preston Old Road CSO
Overflow on sewer network
Company site name
293 PRESTON OLD ROAD CSO
EA ID / permit
UUP00031 · 01BBN0045
Outlet location
SD6624026970 (OS grid reference) · View on Apple Maps
WFD catchment
Darwen - conf Davy Field Bk to conf Blakewater (GB112071065270)
2024 spills / hours
1 / 1.5
Long-term average
0.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
River Darwen 0 0.0 down 100% 100%
Hough Hill Road/Grasscroft St CSO
Overflow on sewer network
Company site name
HOUGH HILL ROAD / GRASSCROFT STREET CSO
EA ID / permit
UUP00993 · 01TAM0132
Outlet location
SJ9645098180 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Chew Brook to Swineshaw Brook) (GB112069061111)
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Tame via SWS 0 0.0 no change 100%
Stamford Grove CSO
Overflow on sewer network
EA ID / permit
UUP01835 · 01TAM0102
Outlet location
SJ9565098980 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Swineshaw Brook to Mersey) (GB112069061112)
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Tame via A Culvert 0 0.0 no change 100%
Preston Old Road CSO
Overflow on sewer network
Company site name
Preston Old Road CSO
EA ID / permit
UUP00032 · NPSWQD010687
Outlet location
SD6624026970 (OS grid reference) · View on Apple Maps
WFD catchment
Darwen - conf Davy Field Bk to conf Blakewater (GB112071065270)
2024 spills / hours
1 / 0.2
Long-term average
0.6 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Blakewater 0 0.0 down 100% 100%
75 Lower Bank Road CSO
Overflow on sewer network
EA ID / permit
UUP00059 · 01PRE0017
Outlet location
SD5409031320 (OS grid reference) · View on Apple Maps
WFD catchment
Savick Brook (GB112071065470)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Eaves Brook 0 0.0 no change 100%
Glencroft Pumping Station
Storm discharge at pumping station
Company site name
Glencroft PS
EA ID / permit
UUP00807 · 017091518
Outlet location
SD5500019000 (OS grid reference) · View on Apple Maps
WFD catchment
Yarrow Culbeck Brook to tidal (GB112070064861)
2024 spills / hours
1 / 0.4
Long-term average
0.7 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Ransnap Brook 0 0.0 down 100% 96%
Grimshaw Park CSO
Overflow on sewer network
Company site name
Grimshaw Park CSO
EA ID / permit
UUP00865 · 01BBN0037
Outlet location
SD6854027100 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Blakewater 0 0.0 no change 100%
Hm Borstal Hindley CSO (508NB)
Overflow on sewer network
Company site name
Adjacent HM Borstal Hindley CSO
EA ID / permit
UUP00973 · 016983227
Outlet location
SD6175002350 (OS grid reference) · View on Apple Maps
WFD catchment
Hey/Borsdane Brook (GB112069064520)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Brookside Brook 0 0.0 no change 100%
Mellor Street CSO
Overflow on sewer network
EA ID / permit
UUP01281 · 01ROC0029
Outlet location
SD8860013800 (OS grid reference) · View on Apple Maps
WFD catchment
Spodden (GB112069064730)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Spodden 0 0.0 no change 100%
212 Mottram Road CSO
Overflow on sewer network
Company site name
212 Mottram Road CSO
EA ID / permit
UUP00020 · 01TAM0114
Outlet location
SJ9721097300 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Chew Brook to Swineshaw Brook) (GB112069061111)
2024 spills / hours
0 / 0.0
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Trib of Acres Brook via SWS 0 0.0 no change 100%
Church Street CSO
Overflow on sewer network
Company site name
Church Street CSO
EA ID / permit
UUP00483 · 01VRY0104
Outlet location
SJ6631071100 (OS grid reference) · View on Apple Maps
WFD catchment
Dane (Wheelock to Weaver) (GB112068060470)
2024 spills / hours
0 / 0.0
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Eldersbriar Brook 0 0.0 no change 100%
Corfe Crescent CSO
Overflow on sewer network
Company site name
Outside No.X Corfe Crescent CSO
EA ID / permit
UUP00541 · NPSWQD010100
Outlet location
SJ9165185164 (OS grid reference) · View on Apple Maps
WFD catchment
Micker (Norbury) Brook (GB112069060920)
2024 spills / hours
3 / 4.3
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Norbury Brook via SWS 0 0.0 down 100% 100%
London Road Nantwich CSO
Overflow on sewer network
Company site name
London Road (Nantwich) Combined Sewer Overflow (Site ID 162C7) (CRE0081)
EA ID / permit
UUP01171 · 016881771
Outlet location
SJ6507053130 (OS grid reference) · View on Apple Maps
WFD catchment
Weaver (Barnett to Valley Brook) (GB112068060461)
2024 spills / hours
0 / 0.0
Long-term average
0.8 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Weaver via a surface water sewer 0 0.0 no change 100%
Ramsgreave Drive CSO
Overflow on sewer network
Company site name
Ramsgreave Drive CSO
EA ID / permit
UUP01610 · 017180475
Outlet location
SD6824030760 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
1 / 0.4
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Tributary of River Blakewater 0 0.0 down 100% 100%
Sawyer Brow/Victora Street CSO
Overflow on sewer network
Company site name
SAWYER BROW / VICTORIA STREET CSO
EA ID / permit
UUP01722 · 01TAM0080
Outlet location
SJ9560095900 (OS grid reference) · View on Apple Maps
WFD catchment
Wilson Brook (GB112069061280)
2024 spills / hours
0 / 0.0
Long-term average
0.8 spills a year (monitored since 2021)
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tributary of Wilson Brook 0 0.0 no change 83%
South of Blackley New Road CSO
Overflow on sewer network
Company site name
South Blackley New Road CSO
EA ID / permit
UUP01785 · 016982986
Outlet location
SD8390003150 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
1 / 0.1
Long-term average
0.8 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Irk 0 0.0 down 100% 98%
Bury New Road CSO
Overflow on sewer network
Company site name
Bury New Road CSO
EA ID / permit
UUP00378 · 016982879
Outlet location
SD8145003490 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
2 / 1.0
Long-term average
1.0 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Prestwich Clough via Clvrt 0 0.0 down 100% 71%
Edith Street CSO 078NL
Overflow on sewer network
Company site name
Edith Street CSO
EA ID / permit
UUP00690 · 01BOL0102
Outlet location
SD7054008870 (OS grid reference) · View on Apple Maps
WFD catchment
Middle Brook (GB112069064540)
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Croal 0 0.0 no change 100%
Horest Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
Horest Lane CSO
EA ID / permit
UUP00988 · 016982961
Outlet location
SD9705009250 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Source to Chew Brook) (GB112069064741)
2024 spills / hours
2 / 2.1
Long-term average
1.0 spills a year (monitored since 2020)
Monitor below 90%
Sensor failure / issue · Resolved - Nov
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Tame 0 0.0 down 100% 79%
Lathbury Road Adj to Footpath CSO
Overflow on sewer network
Company site name
Lathbury Road (Adjacent to the footpath) Combined Sewer Overflow
EA ID / permit
UUP01115 · 01MAN0087
Outlet location
SD8604000860 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Moston Brook 0 0.0 no change 94%
London Road
Overflow on sewer network
Company site name
London Road CSO
EA ID / permit
UUP01172 · 017160314
Outlet location
SD5528028742 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE_Transitional (GB531207112400)
Bathing water
St Annes
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Ribble via surface water sewer 0 0.0 no change 100%
Palmerston Street CSO 28041 MAN0402
Overflow on sewer network
Company site name
Palmerston Street CSO
EA ID / permit
UUP01502 · 016983280
Outlet location
SJ8589097990 (OS grid reference) · View on Apple Maps
WFD catchment
Medlock (Lumb Brook to Irwell) (GB112069061152)
2024 spills / hours
1 / 1.4
Long-term average
1.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Medlock 0 0.0 down 100% 100%
Holden STW
Inlet overflow at sewage works
Sewage works
Holden
Company site name
Holden WwTW
EA ID / permit
UUP02265 · Unpermitted
Outlet location
SD7770249130 (OS grid reference) · View on Apple Maps
WFD catchment
Holden Beck (GB112071065550)
2024 spills / hours
2 / 1.9
Long-term average
1.0 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Jul
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Holden Beck 0 0.0 down 100% 90%
Cuerdale Lane CSO 401QM
Overflow on sewer network
Company site name
CUERDALE LANE CSO
EA ID / permit
UUP00590 · 01SRI0026
Outlet location
SD5654028480 (OS grid reference) · View on Apple Maps
WFD catchment
Ribble - conf Calder to tidal (GB112071065500)
2024 spills / hours
1 / 0.1
Long-term average
1.2 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
River Ribble 0 0.0 down 100% 100%
Vaughan Street CSO
Overflow on sewer network
Company site name
Vaughan Street Combined Sewer Overflow
EA ID / permit
UUP01989 · 016993693
Outlet location
SJ8688097060 (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
1.2 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Corn Brook in Culvert 0 0.0 no change 98%
Belgrave Road CSO
Overflow on sewer network
Company site name
Belgrave Road CSO
EA ID / permit
UUP00218 · 017180472
Outlet location
SD6890021810 (OS grid reference) · View on Apple Maps
WFD catchment
Darwen - headwaters to conf Davy Field Bk (GB112071065240)
2024 spills / hours
0 / 0.0
Long-term average
1.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tributary of River Darwen 0 0.0 no change 100%
Stocks Lane CSO
Overflow on sewer network
EA ID / permit
UUP01868 · 01TAM0113
Outlet location
SJ9741098290 (OS grid reference) · View on Apple Maps
WFD catchment
Tame (Chew Brook to Swineshaw Brook) (GB112069061111)
2024 spills / hours
0 / 0.0
Long-term average
1.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Stocks Brook 0 0.0 no change 100%
Hall I Th Wood CSO 071XP
Overflow on sewer network
Company site name
HALL i' th WOOD CSO
EA ID / permit
UUP00881 · 01BOL0071
Outlet location
SD7222011410 (OS grid reference) · View on Apple Maps
WFD catchment
Eagley Brook (GB112069064570)
2024 spills / hours
0 / 0.0
Long-term average
1.3 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Eagley Brook 0 0.0 no change 100%
Heapey Road CSO 121YP
Overflow on sewer network
Company site name
Heapey CSO
EA ID / permit
UUP00932 · 01CHR0013
Outlet location
SD6001018920 (OS grid reference) · View on Apple Maps
WFD catchment
Yarrow US Big Lodge Water (GB112070064951)
2024 spills / hours
2 / 1.0
Long-term average
1.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Black Brook, Trib of R Yarrow 0 0.0 down 100% 99%
Long Millgate CSO
Overflow on sewer network
Company site name
Long Millgate_Near Manchester Cathedral Gardens_CSO
EA ID / permit
UUP01174 · 016993741
Outlet location
SJ8400098910 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
0 / 0.0
Long-term average
1.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Irk 0 0.0 no change 100%
Pow Bridge/Station Road CSO
Overflow on sewer network
Company site name
POW Bridge/Station Road CSO
EA ID / permit
UUP01848 · 017480323
Outlet location
NX9697011980 (OS grid reference) · View on Apple Maps
WFD catchment
Pow Beck (GB112068060530)
Bathing water
St Bees
2024 spills / hours
1 / 0.5
Long-term average
1.3 spills a year (monitored since 2018)
Monitor below 90%
Sensor failure / issue · Resolved - January after reporting year
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Pow Beck 0 0.0 down 100% 87%
Windsor Road/Winterdyne Street CSO
Overflow on sewer network
Company site name
WINDSOR ROAD / WINTERDYNE STREET CSO
EA ID / permit
UUP02143 · 01MAN0082
Outlet location
SD8618001260 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
0 / 0.0
Long-term average
1.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Moston Brook 0 0.0 no change 100%
Dean Street CSO (471RJ)
Overflow on sewer network
Company site name
Dean Street CSO
EA ID / permit
UUP00622 · 01VRY0006
Outlet location
SJ6553066360 (OS grid reference) · View on Apple Maps
WFD catchment
Weaver (Winsford Flashes to Dane) (GB112068060463)
2024 spills / hours
2 / 0.4
Long-term average
1.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Culvert Trib Dene Brook Viasws 0 0.0 down 100% 97%
Off John St CSO (472JC)
Overflow on sewer network
Company site name
Off John Street CSO
EA ID / permit
UUP01444 · 01VRY0004
Outlet location
SJ6552066270 (OS grid reference) · View on Apple Maps
WFD catchment
Weaver (Winsford Flashes to Dane) (GB112068060463)
2024 spills / hours
1 / 0.1
Long-term average
1.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Weaver via Culvert 0 0.0 down 100% 100%
Pringle Street CSO
Overflow on sewer network
EA ID / permit
UUP01585 · 01BBN0054
Outlet location
SD6939027460 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
0 / 0.0
Long-term average
1.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Tributary of River Blakewater 0 0.0 no change 100%
Biggar Village Pumping Station
Storm discharge at pumping station
Company site name
Biggar Village PS
EA ID / permit
UUP00235 · 017470159
Outlet location
SD1916066320 (OS grid reference) · View on Apple Maps
WFD catchment
Morecambe Bay - transitional (GB641211171000)
Bathing water
Walney Biggar Bank; Walney West Shore; Walney Sandy Gap
Shellfish water
Walney
2024 spills / hours
1 / 6.6
Long-term average
1.5 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Walney Channel 0 0.0 down 100% 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.