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
West Road CSO 38055
Overflow on sewer network
Company site name
Weld Road CSO
EA ID / permit
UUP02079 · 017190787
Outlet location
SD3171016030 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY MOUTH - transitional (GB641211630001)
Bathing water
Ainsdale; Southport
Shellfish water
Ribble
2024 spills / hours
2 / 0.7
Long-term average
5.5 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.3 hours spilling →
The Irish Sea via a surface water sewer 1 0.3 down 50% 100%
Black Horse Hill CSO 511EV
Overflow on sewer network
Company site name
Black Horse Hill CSO
EA ID / permit
UUP00248 · 016892458
Outlet location
SJ2294087780 (OS grid reference) · View on Apple Maps
WFD catchment
The Birket including Arrowe Brook and Fender (GB112068060530)
Bathing water
West Kirby
2024 spills / hours
0 / 0.0
Long-term average
0.3 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.3 hours spilling →
Via a surface water sewer to Newton Brook, a tributary of River Birket 1 0.3 up from 0 100%
Gildersleets Lane CSO 151VM
Overflow on sewer network
Company site name
Gildersleets Lane CSO
EA ID / permit
UUP00789 · 01CRA0005
Outlet location
SD8089062610 (OS grid reference) · View on Apple Maps
WFD catchment
Ribble (Stainforth to Long Preston Beck) (GB112071065614)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.3 hours spilling →
River Ribble 1 0.3 up from 0 97%
Fairy Lane CSO 281T3
Overflow on sewer network
Company site name
FAIRY LANE CSO
EA ID / permit
UUP00722 · 01MAN0066
Outlet location
SJ8346099320 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
2 / 0.6
Long-term average
2.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.3 hours spilling →
River Irwell 2 0.3 no change 97%
Junction of Wordsowrth Street CSO
Overflow on sewer network
Company site name
Junction of Wordsworth Street CSO
EA ID / permit
UUP01045 · 01EDE0029
Outlet location
NY5142030380 (OS grid reference) · View on Apple Maps
WFD catchment
Eamont (Upper) (GB102076071020)
2024 spills / hours
5 / 1.0
Long-term average
3.7 spills a year (monitored since 2020)
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.3 hours spilling →
Thacka Beck 2 0.3 down 60% 89%
Newlands Road CSO
Overflow on sewer network
Company site name
Newlands Road CSO
EA ID / permit
UUP01394 · 016983326
Outlet location
SJ6573099180 (OS grid reference) · View on Apple Maps
WFD catchment
Pennington Brook (Glaze) (GB112069060760)
2024 spills / hours
14 / 19
Long-term average
5.8 spills a year (monitored since 2021)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.3 hours spilling →
Pennington Brook via SWS 1 0.3 down 93% 100%
Grange Valley CSO (42003)
Storm discharge at pumping station
Company site name
Grange Valley
EA ID / permit
UUP00828 · EPRQB3792RZ
Outlet location
SJ5585096140 (OS grid reference) · View on Apple Maps
WFD catchment
Sankey Brook (Rainford Brook to Mersey) (GB112069061200)
2024 spills / hours
2 / 1.2
Long-term average
6.2 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.3 hours spilling →
Freshwater Stteam 1 0.3 down 50% 100%
Hornby STW
Inlet overflow at sewage works
Sewage works
Hornby
Company site name
HORNBY WwTW
EA ID / permit
UUP00989 · 017270017
Outlet location
SD5805068390 (OS grid reference) · View on Apple Maps
WFD catchment
Wenning - Lower (GB112072065990)
2024 spills / hours
31 / 0.3
Long-term average
38.0 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.3 hours spilling →
River Wenning 21 0.3 down 32% 100%
Charles Street CSO
Overflow on sewer network
Company site name
Charles Street CSO
EA ID / permit
UUP00451 · 01MAN0183
Outlet location
SJ8432097500 (OS grid reference) · View on Apple Maps
WFD catchment
Medlock (Lumb Brook to Irwell) (GB112069061152)
2024 spills / hours
1 / 0.3
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
Volume & pollution
Estimate from 0.2 hours spilling →
River Medlock 1 0.2 no change 98%
The Old Vicarage CSO
Overflow on sewer network
Company site name
The Old Vicarage CSO
EA ID / permit
UUP01923 · 016981472
Outlet location
SK0107080790 (OS grid reference) · View on Apple Maps
WFD catchment
Randall Carr Brook (GB112069060860)
2024 spills / hours
1 / 0.1
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
Volume & pollution
Estimate from 0.2 hours spilling →
Randall Carr Brook 1 0.2 no change 100%
Rear of 36 Peter Street
Overflow on sewer network
Company site name
Alleyway Adjacent to Rear of Peter Street CSO
EA ID / permit
UUP01628 · 01VRY0095
Outlet location
SJ6679074220 (OS grid reference) · View on Apple Maps
WFD catchment
Wade Brook (GB112068060370)
2024 spills / hours
0 / 0.0
Long-term average
2.6 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Wade Brook via SWS 1 0.2 up from 0 100%
Lark Hill/Brookhouse Lane CSO
Overflow on sewer network
Company site name
Lark Hill/Brook House Lane CSO
EA ID / permit
UUP01114 · 017180473
Outlet location
SD6874028700 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
1 / 0.1
Long-term average
3.4 spills a year (monitored since 2021)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Tributary of River Blakewater 3 0.2 up 200% 90%
Ennisdale Drive CSO
Overflow on sewer network
Company site name
Ennisdale Drive CSO
EA ID / permit
UUP00705 · 016982966
Outlet location
SJ2293087780 (OS grid reference) · View on Apple Maps
WFD catchment
The Birket including Arrowe Brook and Fender (GB112068060530)
Bathing water
West Kirby
Shellfish water
North Wirral (West)
2024 spills / hours
6 / 0.5
Long-term average
3.9 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Newton Brook 2 0.2 down 67% 100%
Monsall Road (J Sewer) CSO (282SF)
Overflow on sewer network
Company site name
MONSALL ROAD (J SEWER) CSO
EA ID / permit
UUP01334 · 01MAN0086
Outlet location
SD8613400952 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
2 / 0.5
Long-term average
4.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Culverted Trib of Moston Brook 1 0.2 down 50% 100%
Tbc
Overflow on sewer network
Company site name
Westbourne Rd CSO (512ZA)
EA ID / permit
UUP02247 · Permit applied for
Outlet location
SJ2087586694 (OS grid reference) · View on Apple Maps
WFD catchment
Dee (N. Wales) (GB531106708200)
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 0.2 hours spilling →
Dee Estuary 1 0.2 up from 0 95%
Water Street CSO 07020
Overflow on sewer network
Company site name
Water Street CSO
EA ID / permit
UUP02040 · 016982191
Outlet location
SD7205009500 (OS grid reference) · View on Apple Maps
WFD catchment
Middle Brook (GB112069064540)
2024 spills / hours
0 / 0.0
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 0.2 hours spilling →
River Croal 1 0.2 up from 0 100%
Lostock Grove CSO
Overflow on sewer network
Company site name
Lostock Grove CSO
EA ID / permit
UUP01190 · 016940193
Outlet location
SJ7884095310 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell / Manchester Ship Canal (Irk to confluence with Upper Mersey) (GB112069061452)
2024 spills / hours
1 / 1.2
Long-term average
1.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Longford Brook via SWS 1 0.2 no change 100%
Manchester Rd/Selbourne Rd CSO
Overflow on sewer network
Company site name
Manchester Road/Selbourne Road CSO
EA ID / permit
UUP01233 · 017190867
Outlet location
SD5470028990 (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 / 0.4
Long-term average
6.1 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
River Ribble via Swillbrook Culvert 1 0.2 down 50% 98%
Croft Ln Manchester Rd CSO BOL0206
Overflow on sewer network
Company site name
Croft Lane / Manchester Road CSO
EA ID / permit
UUP00567 · 016941054
Outlet location
SD7249207985 (OS grid reference) · View on Apple Maps
WFD catchment
Middle Brook (GB112069064540)
2024 spills / hours
2 / 0.2
Long-term average
11.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Jenny Beck Culvert River Croal 1 0.2 down 50% 99%
Rickerby Park CSO
Overflow on sewer network
Company site name
Rickerby Park CSO
EA ID / permit
UUP01654 · 017680310
Outlet location
NY4055056980 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Eamont to tidal (GB102076073940)
2024 spills / hours
7 / 5.8
Long-term average
11.8 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 0.2 hours spilling →
River Eden 1 0.2 down 86% 100%
Promenade Combined Sewer Overflow
Overflow on sewer network
Company site name
Promenade CSO
EA ID / permit
UUP01587 · 017370196
Outlet location
SD4067077560 (OS grid reference) · View on Apple Maps
WFD catchment
KENT (GB531207312000)
2024 spills / hours
3 / 0.2
Long-term average
12.2 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.2 hours spilling →
The Kent Channel Morecambe Bay 2 0.2 down 33% 100%
Park Street Combined Sewer Overflow
Overflow on sewer network
Company site name
Park Street SO
EA ID / permit
UUP01516 · 016930977
Outlet location
SJ3470088000 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY - Transitional (GB531206908100)
2024 spills / hours
3 / 4.7
Long-term average
4.7 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
River Mersey Estuary 3 0.2 no change 100%
Castle St
Overflow on sewer network
Company site name
Castle Street, Northwich
EA ID / permit
UUP00423 · 01VRY0103
Outlet location
SJ6567073680 (OS grid reference) · View on Apple Maps
WFD catchment
Weaver (Winsford Flashes to Dane) (GB112068060463)
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 0.2 hours spilling →
River Weaver 1 0.2 up from 0 100%
Crewe Road Mill Lane CSO 138CG
Overflow on sewer network
Company site name
CREWE ROAD / MILL LANE CSO
EA ID / permit
UUP00562 · 01CON0044
Outlet location
SJ7512059070 (OS grid reference) · View on Apple Maps
WFD catchment
Wheelock (including Hassall Brook) (GB112068055420)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
River Wheelock 1 0.2 up from 0 96%
Ormskirk Road/France Street CSO
Overflow on sewer network
Company site name
ORMSKIRK ROAD / FRANCE STREET CSO
EA ID / permit
UUP01476 · 01WIG0008
Outlet location
SD5710005181 (OS grid reference) · View on Apple Maps
WFD catchment
Douglas - Lower (GB112070064820)
2024 spills / hours
0 / 0.0
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 0.2 hours spilling →
River Douglas 2 0.2 up from 0 100%
Chapelgreen/Arundel St
Overflow on sewer network
Company site name
Chapel Green Road/ Arundle Street CSO
EA ID / permit
UUP00448 · 01WIG0059
Outlet location
SD6196004411 (OS grid reference) · View on Apple Maps
WFD catchment
Hey/Borsdane Brook (GB112069064520)
2024 spills / hours
– / –
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 0.2 hours spilling →
Borsdane Brook 1 0.2 100%
Sharples Ave Eastgrove Ave CSO 071S
Overflow on sewer network
Company site name
Sharples/East Grove Avenue
EA ID / permit
UUP01745 · 01BOL0134
Outlet location
SD7154012680 (OS grid reference) · View on Apple Maps
WFD catchment
Eagley Brook (GB112069064570)
2024 spills / hours
2 / 0.1
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 0.2 hours spilling →
Eagley Brook 1 0.2 down 50% 99%
Highcross Road CSO
Overflow on sewer network
Company site name
Highcross Road CSO
EA ID / permit
UUP00963 · 017280298
Outlet location
SD3622038690 (OS grid reference) · View on Apple Maps
WFD catchment
Hillylaid Pool - Tidal Wyre (GB112072066120)
Bathing water
Fleetwood
2024 spills / hours
0 / 0.0
Long-term average
2.5 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Main Dyke, a tributary of the River Wyre 1 0.2 up from 0 100%
Peter Street CSO 212LL
Overflow on sewer network
Company site name
Peter Street Combined Sewer Overflow (212LL) (PEA0082)
EA ID / permit
UUP01542 · 016982638
Outlet location
SK0207096970 (OS grid reference) · View on Apple Maps
WFD catchment
Etherow (Woodhead Res. to Glossop Bk.) (GB112069060780)
2024 spills / hours
1 / 0.1
Long-term average
3.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
River Etherow 1 0.2 no change 100%
The Crescent CSO 091EJ
Overflow on sewer network
Company site name
The Crescent CSO
EA ID / permit
UUP01916 · 01BRY0043
Outlet location
SD8174003690 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
2 / 0.3
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 0.2 hours spilling →
Prestwich Clough via Clvrt 1 0.2 down 50% 100%
Milnrow Road/Fishwick Street CSO
Overflow on sewer network
EA ID / permit
UUP01324 · EPRQB3590VT
Outlet location
SD9048013128 (OS grid reference) · View on Apple Maps
WFD catchment
Roch (Source to Spodden) (GB112069064720)
2024 spills / hours
3 / 0.6
Long-term average
4.7 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Culverted section of Moss Brook a tributary of River Roch 2 0.2 down 33% 100%
Kingfisher Drive CSO 092BS
Overflow on sewer network
Company site name
Kingfisher Drive CSO
EA ID / permit
UUP01067 · 01BRY0011
Outlet location
SD8168011790 (OS grid reference) · View on Apple Maps
WFD catchment
Roch (Spodden to Irwell) (GB112069064600)
2024 spills / hours
4 / 0.9
Long-term average
5.3 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Clvrtd Section Gypsy Brook 1 0.2 down 75% 100%
Rochdale Road/Eggington Street CSO
Overflow on sewer network
Company site name
ROCHDALE ROAD / EGGINGTON STREET CSO
EA ID / permit
UUP01673 · 01MAN0058
Outlet location
SD8543000100 (OS grid reference) · View on Apple Maps
WFD catchment
Irk (Wince to Irwell) (GB112069061131)
2024 spills / hours
2 / 0.2
Long-term average
6.6 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Moston Brook 2 0.2 no change 100%
Billinge South PS
Storm discharge at pumping station
Company site name
BILLINGE SOUTH PUMPING STATION
EA ID / permit
UUP00238 · 016920126
Outlet location
SJ5238099020 (OS grid reference) · View on Apple Maps
WFD catchment
Black Brook (Mersey Estuary) (GB112069061230)
2024 spills / hours
3 / 0.2
Long-term average
25.8 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.2 hours spilling →
Trib Black Brook 2 0.2 down 33% 100%
Lombard Gr/Lorne Rd
Overflow on sewer network
Company site name
Lombard Grove/Lorne Road CSO
EA ID / permit
UUP01169 · 016982821
Outlet location
SJ8523093520 (OS grid reference) · View on Apple Maps
WFD catchment
Fallowfield Brook (GB112069061410)
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 0.1 hours spilling →
Cringle Brook 1 0.1 up from 0 100%
Hardhorn Rd
Overflow on sewer network
Company site name
Hardhorn Road CSO
EA ID / permit
UUP02195 · 017290544
Outlet location
SD3622038691 (OS grid reference) · View on Apple Maps
WFD catchment
Hillylaid Pool - Tidal Wyre (GB112072066120)
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 0.1 hours spilling →
Main Dyke - tributary of the Wyre 1 0.1 up from 0 99%
Mill Street Bradford Manchester CSO
Overflow on sewer network
Company site name
Mill Street CSO
EA ID / permit
UUP01317 · 016982733
Outlet location
SJ8619098570 (OS grid reference) · View on Apple Maps
WFD catchment
Valley Brook (Englesea Brook to Weaver) (GB112068055310)
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
Volume & pollution
Estimate from 0.1 hours spilling →
River Medlock 1 0.1 up from 0 100%
Warwick Bridge STW
Inlet overflow at sewage works
Sewage works
Warwick Bridge
Company site name
Warwick Bridge WWTW
EA ID / permit
UUP02279 · Unpermitted
Outlet location
NY4722057670 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Eamont to tidal (GB102076073940)
2024 spills / hours
0 / 0.0
Long-term average
1.0 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 0.1 hours spilling →
River Eden 2 0.1 up from 0 87%
Deardengate/Bury Road CSO
Overflow on sewer network
Company site name
DEARDENGATE / BURY ROAD CSO
EA ID / permit
UUP00626 · 01ROS0039
Outlet location
SD7808023251 (OS grid reference) · View on Apple Maps
WFD catchment
Ogden (GB112069064650)
2024 spills / hours
2 / 0.7
Long-term average
1.5 spills a year (monitored since 2024)
Monitor below 90%
Sensor failure / issue · Resolved - Oct
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Swinnel Brook 1 0.1 down 50% 74%
Vale Street
Overflow on sewer network
Company site name
Vale Street
EA ID / permit
UUP01984 · 017180471
Outlet location
SD6884022540 (OS grid reference) · View on Apple Maps
WFD catchment
Darwen - headwaters to conf Davy Field Bk (GB112071065240)
2024 spills / hours
2 / 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 0.1 hours spilling →
Trib River Darwen 1 0.1 down 50% 92%
745 Edenfield Road CSO
Overflow on sewer network
Company site name
745 Edenfield Road CSO
EA ID / permit
UUP00058 · 016997072
Outlet location
SD8583014620 (OS grid reference) · View on Apple Maps
WFD catchment
Naden Brook (GB112069064710)
2024 spills / hours
0 / 0.0
Long-term average
2.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Naden Brook Trib of R Roch 1 0.1 up from 0 100%
Chorley New Rd Telford St CSO 071JQ
Overflow on sewer network
Company site name
CHORLEY NEW ROAD / TELFORD STREET CSO
EA ID / permit
UUP00469 · 01BOL0133
Outlet location
SD6440010670 (OS grid reference) · View on Apple Maps
WFD catchment
Douglas - Upper (GB112070064850)
2024 spills / hours
2 / 0.2
Long-term average
5.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Middle Brook 2 0.1 no change 100%
Brownhill Drive CSO
Overflow on sewer network
EA ID / permit
UUP00355 · 01BBN0013
Outlet location
SD6948029920 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
1 / 0.8
Long-term average
5.8 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Trib of River Blakewater 2 0.1 up 100% 100%
Chester Road (Middlewich) PS (13510)
Overflow on sewer network
Company site name
Nantwich Road/Chester Road CSO
EA ID / permit
UUP01365 · 01CON0009
Outlet location
SJ6947066690 (OS grid reference) · View on Apple Maps
WFD catchment
Wheelock (Fowle Brook to Dane) (GB112068055380)
2024 spills / hours
2 / 0.3
Long-term average
22.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
River Wheelock 1 0.1 down 50% 99%
Chapel Green Road/Romford St CSO
Overflow on sewer network
Company site name
Chapel Green Road/Romford Street CSO
EA ID / permit
UUP00442 · 016993521
Outlet location
SD6196004412 (OS grid reference) · View on Apple Maps
WFD catchment
Hey/Borsdane Brook (GB112069064520)
2024 spills / hours
2 / 0.4
Long-term average
29.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Borsdane Brook 1 0.1 down 50% 100%
Rossall School Pumping Station
Storm discharge at pumping station
Company site name
Rossall School PS
EA ID / permit
UUP01688 · 017260162
Outlet location
SD3172045110 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY MOUTH - transitional (GB641211630001)
Bathing water
Cleveleys
2024 spills / hours
2 / 1.3
Long-term average
2.9 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Unnamed Dyke on Rossall School private land 2 0.1 no change 100%
Tbc
Overflow on sewer network
Company site name
Highgate Jnc Lowther Street CSO (399KL)
EA ID / permit
UUP02215 · Permit applied for
Outlet location
SD5165092639 (OS grid reference) · View on Apple Maps
WFD catchment
Kent - conf Sprint to tidal (GB112073071460)
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 0.1 hours spilling →
River Kent 1 0.1 up from 0 95%
Victoria St CSO 212WG
Overflow on sewer network
Company site name
Victoria Street CSO
EA ID / permit
UUP02000 · 01PEA0034
Outlet location
SK0346093940 (OS grid reference) · View on Apple Maps
WFD catchment
Glossop (Shelf) Brook (Source to Long Clough Brook) (GB112069060730)
2024 spills / hours
1 / 0.1
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
Volume & pollution
Estimate from 0.1 hours spilling →
Glossop Brook 1 0.1 no change 100%
Hawthorn Road CSO 451YJ
Overflow on sewer network
Company site name
Hawthorn Road CSO
EA ID / permit
UUP00923 · 01TRA0013
Outlet location
SJ7748087990 (OS grid reference) · View on Apple Maps
WFD catchment
Timperley Brook (GB112069061260)
2024 spills / hours
1 / 0.2
Long-term average
1.5 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Timperley Brook 2 0.1 up 100% 100%
Park Road (Stretford) CSO
Overflow on sewer network
Company site name
Park Road (Stretford) CSO
EA ID / permit
UUP01511 · EPRSB3398RR
Outlet location
SJ7088091510 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell / Manchester Ship Canal (Irk to confluence with Upper Mersey) (GB112069061452)
2024 spills / hours
2 / 1.5
Long-term average
2.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.1 hours spilling →
Bent Lane Brook 1 0.1 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.