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
Old Eagley CSO 073DM
Overflow on sewer network
Company site name
Old Eagley CSO
EA ID / permit
UUP01454 · 016983216
Outlet location
SD7233012830 (OS grid reference) · View on Apple Maps
WFD catchment
Eagley Brook (GB112069064570)
2024 spills / hours
27 / 87
Long-term average
47.6 spills a year (monitored since 2018)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 90 hours spilling →
Eagley Brook 35 90 up 30% 93%
Gamblesby Pumping Station
Storm discharge at pumping station
Company site name
Gamblesby PS
EA ID / permit
UUP00770 · 017680387
Outlet location
NY6052039500 (OS grid reference) · View on Apple Maps
WFD catchment
Glassonby Beck (GB102076073820)
2024 spills / hours
27 / 117
Long-term average
33.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 90 hours spilling →
Gamblesby Beck 25 90 down 7% 100%
Queens Park Drive CSO
Overflow on sewer network
Company site name
Queens Park Drive (Crewe) CSO
EA ID / permit
UUP01592 · 01CRE0031
Outlet location
SJ6855355449 (OS grid reference) · View on Apple Maps
WFD catchment
Valley Brook (Englesea Brook to Weaver) (GB112068055310)
2024 spills / hours
41 / 183
Long-term average
38.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 89 hours spilling →
Valley Brook via SWS 30 89 down 27% 100%
Off Well Lane Kingsley CSO (472JN)
Overflow on sewer network
Company site name
Off Well Lane Kingsley CSO
EA ID / permit
UUP01452 · 01VRY0064
Outlet location
SJ5528074740 (OS grid reference) · View on Apple Maps
WFD catchment
Crowton Brook (GB112068060550)
2024 spills / hours
3 / 1.1
Long-term average
15.4 spills a year (monitored since 2021)
High-spill reason (company)
Performance - Asset configuration (e.g. PS/rising main/storm tanks)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 89 hours spilling →
Kingsley Brook 47 89 up 1467% 94%
Appleby CSO
Overflow on sewer network
Company site name
Appleby CSO Adj to Appleby WwTW
EA ID / permit
UUP00122 · 017680301
Outlet location
NY6766020840 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Scandal Beck to Lyvennet (GB102076070880)
2024 spills / hours
34 / 188
Long-term average
33.1 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 89 hours spilling →
River Eden 20 89 down 41% 100%
Dufton Wastewater Treatment Works
Inlet overflow at sewage works
Sewage works
Dufton
Company site name
DUFTON WwTW
EA ID / permit
UUP00659 · 017670010
Outlet location
NY6879025320 (OS grid reference) · View on Apple Maps
WFD catchment
Swindale Beck nr Dufton (GB102076070960)
2024 spills / hours
43 / 138
Long-term average
29.8 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 89 hours spilling →
Mill Beck 28 89 down 35% 100%
Halton West Pumping Station Hltwe
Storm discharge at pumping station
Company site name
Halton West SPS
EA ID / permit
UUP00890 · 017280287
Outlet location
SD4998064660 (OS grid reference) · View on Apple Maps
WFD catchment
Lune - conf Wenning to tidal (GB112072065980)
2024 spills / hours
40 / 70
Long-term average
40.7 spills a year (monitored since 2017)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 89 hours spilling →
River Lune 46 89 up 15% 100%
Langrigg Pumping Station
Storm discharge at pumping station
Company site name
Langrigg PS
EA ID / permit
UUP01109 · 017580268
Outlet location
NY1728046450 (OS grid reference) · View on Apple Maps
WFD catchment
Holme Dub (GB102075073490)
2024 spills / hours
4 / 8.2
Long-term average
13.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 88 hours spilling →
Langrigg Beck 19 88 up 375% 100%
Arlecdon Parks Road CSO
Overflow on sewer network
Company site name
Arlecdon Parks Road CSO
EA ID / permit
UUP00131 · 017480419
Outlet location
NY0522018650 (OS grid reference) · View on Apple Maps
WFD catchment
Ehen (upper including Liza) (GB112074070010)
2024 spills / hours
38 / 80
Long-term average
44.0 spills a year (monitored since 2020)
High-spill reason (company)
Data collection - Confirmed exceptional weather
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 88 hours spilling →
Eller Gill 58 88 up 53% 100%
Birch Road CSO (451ED)
Overflow on sewer network
Company site name
Birch Road CSO
EA ID / permit
UUP01510 · EPRSB3398EX
Outlet location
SJ7088091510 (OS grid reference) · View on Apple Maps
WFD catchment
Mersey/ Manchester Ship Canal (Irwell/Manchester Ship Canal to Bollin) (GB112069061011)
2024 spills / hours
97 / 223
Long-term average
90.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 88 hours spilling →
Manchester Ship Canal via SWS 37 88 down 62% 100%
Gorsey Lane Dans Rd CSO 201V6
Overflow on sewer network
Company site name
Gorsey Lane/Dan's Road
EA ID / permit
UUP00816 · 01HAL0042
Outlet location
SJ5395085223 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY - Transitional (GB531206908100)
2024 spills / hours
92 / 152
Long-term average
98.5 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 88 hours spilling →
River Mersey via SWS 69 88 down 25% 100%
Newmarket Road PS
Storm discharge at pumping station
Company site name
Newmarket Road PS
EA ID / permit
UUP01395 · NPSWQD010712
Outlet location
SD9250000450 (OS grid reference) · View on Apple Maps
WFD catchment
Medlock (Source to Lumb Brook) (GB112069061151)
2024 spills / hours
30 / 75
Long-term average
34.7 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 87 hours spilling →
Taunton Brook, Trib of Medlock 33 87 up 10% 100%
Brigham Pumping Station (ALL0138)
Storm discharge at pumping station
Company site name
Brigham Pumping Station
EA ID / permit
UUP00325 · EPRJB3597NK
Outlet location
NY0838630592 (OS grid reference) · View on Apple Maps
WFD catchment
Derwent - conf Cocker to tidal (GB112075070520)
2024 spills / hours
30 / 131
Long-term average
29.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 87 hours spilling →
Stony Beck 35 87 up 17% 100%
Kirkby Lonsdale STW
Inlet overflow at sewage works
Sewage works
Kirkby Lonsdale
Company site name
KIRKBY LONSDALE WwTW
EA ID / permit
UUP01078 · 017270006
Outlet location
SD6152077880 (OS grid reference) · View on Apple Maps
WFD catchment
Lune - conf Rawthey to conf Greta (GB112072071690)
2024 spills / hours
65 / 83
Long-term average
58.4 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 87 hours spilling →
River Lune 60 87 down 8% 100%
Stanwix/Stainton CSO
Overflow on sewer network
Company site name
Stanwix and Stainton combined sewer overflow (Site ID 10009) (CAR0055)
EA ID / permit
UUP01846 · 017670218
Outlet location
NY3805056520 (OS grid reference) · View on Apple Maps
WFD catchment
Eden - Eamont to tidal (GB102076073940)
2024 spills / hours
38 / 127
Long-term average
42.1 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 87 hours spilling →
River Eden 21 87 down 45% 100%
Travis Brow/Georges Road CSO
Overflow on sewer network
Company site name
Travis Brow/Georges Road CSO
EA ID / permit
UUP01965 · 016982677
Outlet location
SJ8860090210 (OS grid reference) · View on Apple Maps
WFD catchment
Mersey (upstream of Manchester Ship Canal) (GB112069061030)
2024 spills / hours
70 / 118
Long-term average
79.6 spills a year (monitored since 2017)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
River Mersey 56 86 down 20% 100%
Swan Mill/Drummer Mill CSO
Overflow on sewer network
Company site name
Swan Mill CSO
EA ID / permit
UUP01894 · 016983314
Outlet location
SD8896004570 (OS grid reference) · View on Apple Maps
WFD catchment
Wince Brook (GB112069061120)
2024 spills / hours
77 / 168
Long-term average
92.3 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Monitor below 90%
Comms failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
Springs Brook 54 86 down 30% 88%
Chipping WwTW
Inlet overflow at sewage works
Sewage works
Chipping
Company site name
Chipping Wastewater Treatment Works (CHIPP) 017160030
EA ID / permit
UUP02284 · 017160030
Outlet location
SD6243942254 (OS grid reference) · View on Apple Maps
WFD catchment
Chipping Brook (GB112071065330)
2024 spills / hours
– / –
Long-term average
14.0 spills a year (monitored since 2025)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
Chipping Brook 14 86 100%
Stonehill Road CSO 072TV
Overflow on sewer network
Company site name
Stonehill Road CSO
EA ID / permit
UUP01871 · 016982452
Outlet location
SD7405204856 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
43 / 134
Long-term average
47.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
Singing Clough Brook 26 86 down 40% 100%
Cowling Lane Leyland Lane CSO 401PW
Overflow on sewer network
Company site name
Cowling Lane/Leyland Lane CSO
EA ID / permit
UUP00553 · 01SRI0017
Outlet location
SD5250022090 (OS grid reference) · View on Apple Maps
WFD catchment
Lostock DS Farington Weir (GB112070064912)
2024 spills / hours
114 / 354
Long-term average
84.9 spills a year (monitored since 2018)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
River Lostock 40 86 down 65% 95%
Tbc
Storm discharge at pumping station
Company site name
Prestolee PS
EA ID / permit
UUP02235 · Unpermitted
Outlet location
SD7528305615 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Croal to Irk) (GB112069061451)
2024 spills / hours
45 / 83
Long-term average
34.0 spills a year (monitored since 2024)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 86 hours spilling →
River Irwell 23 86 down 49% 100%
Ellen Vale CSO
Overflow on sewer network
Company site name
Ellen Vale
EA ID / permit
UUP00697 · 017580250
Outlet location
NY1490040800 (OS grid reference) · View on Apple Maps
WFD catchment
Ellen (lower) (GB112075073640)
2024 spills / hours
84 / 208
Long-term average
83.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
River Ellen 11 86 down 87% 99%
Inglebrough Way Bow Lane CSO 40040
Overflow on sewer network
Company site name
Ingleborough Way/Bow Lane CSO
EA ID / permit
UUP01021 · 017081363
Outlet location
SD5494022520 (OS grid reference) · View on Apple Maps
WFD catchment
Lostock DS Farington Weir (GB112070064912)
2024 spills / hours
50 / 125
Long-term average
76.1 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 86 hours spilling →
Bannister Brook 51 86 up 2% 100%
Borsdane Brook (Hindley) CSO
Overflow on sewer network
Company site name
Borsdane Brook (Hindley) CSO
EA ID / permit
UUP00286 · 016983226
Outlet location
SD6085002400 (OS grid reference) · View on Apple Maps
WFD catchment
Hey/Borsdane Brook (GB112069064520)
2024 spills / hours
35 / 182
Long-term average
51.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 85 hours spilling →
Borsdane Brook 15 85 down 57% 100%
194 Ormskirk Road CSO
Overflow on sewer network
Company site name
194 Ormskirk Road
EA ID / permit
UUP00015 · 017081269
Outlet location
SD4875205989 (OS grid reference) · View on Apple Maps
WFD catchment
Tawd (GB112070064790)
2024 spills / hours
69 / 157
Long-term average
65.2 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Operational investigation completed
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 85 hours spilling →
River Tawd via SWS 48 85 down 30% 100%
Radcliffe Central CSO
Overflow on sewer network
Company site name
OUTSIDE THE BRIDGE TAVERN CSO
EA ID / permit
UUP01601 · 01BRY0030
Outlet location
SD7860006950 (OS grid reference) · View on Apple Maps
WFD catchment
Irwell (Roch to Croal) (GB112069060840)
2024 spills / hours
29 / 63
Long-term average
52.3 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 85 hours spilling →
River Irwell 37 85 up 28% 100%
Arlecdon Combined Sewer Overflow
Overflow on sewer network
Company site name
Arlecdon CSO
EA ID / permit
UUP00130 · 017480418
Outlet location
NY0508018430 (OS grid reference) · View on Apple Maps
WFD catchment
Ehen (upper including Liza) (GB112074070010)
2024 spills / hours
0 / 0.0
Long-term average
12.2 spills a year (monitored since 2020)
High-spill reason (company)
Data collection - Confirmed exceptional weather
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 85 hours spilling →
Winder Beck 33 85 up from 0 100%
Watery Lane (Sutton)
Overflow on sewer network
Company site name
Watery Lane CSO
EA ID / permit
UUP02055 · EPRRB3393WZ
Outlet location
SD6085100815 (OS grid reference) · View on Apple Maps
WFD catchment
Sutton Brook (GB112069061170)
2024 spills / hours
26 / 98
Long-term average
30.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 85 hours spilling →
Sutton Mill Brook 13 85 down 50% 98%
Frederick Street Pumping Station
Storm discharge at pumping station
Company site name
Frederick Street Pumping Station
EA ID / permit
UUP00761 · 017480412
Outlet location
SD2123068810 (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; Roosebeck
2024 spills / hours
20 / 63
Long-term average
19.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 84 hours spilling →
Mill Beck/Cavendish Dock 21 84 up 5% 100%
Brook Close CSO
Overflow on sewer network
Company site name
Wellington Road CSO
EA ID / permit
UUP00341 · 016940411
Outlet location
SJ7720089295 (OS grid reference) · View on Apple Maps
WFD catchment
Timperley Brook (GB112069061260)
2024 spills / hours
24 / 70
Long-term average
35.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 84 hours spilling →
Timperley Brook 23 84 down 4% 100%
Woodbarn Farm CSO 07059
Overflow on sewer network
Company site name
Wood Barn Farm CSO
EA ID / permit
UUP02163 · 017091505
Outlet location
SD6209010990 (OS grid reference) · View on Apple Maps
WFD catchment
Douglas - Upper (GB112070064850)
2024 spills / hours
54 / 144
Long-term average
68.3 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 84 hours spilling →
Unnamed Trib the River Douglas 48 84 down 11% 99%
Mill Lane CSO (134I5)
Overflow on sewer network
Company site name
MILL LANE CSO
EA ID / permit
UUP01311 · 01CON0035
Outlet location
SJ8837061520 (OS grid reference) · View on Apple Maps
WFD catchment
Biddulph Brook (GB112068055360)
2024 spills / hours
39 / 105
Long-term average
39.8 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 84 hours spilling →
Dane in Shaw Brook 30 84 down 23% 99%
Lea Gate Pumping Station
Storm discharge at pumping station
Company site name
Lea Gate PS
EA ID / permit
UUP01124 · 017180631
Outlet location
SD4789030020 (OS grid reference) · View on Apple Maps
WFD catchment
RIBBLE_Transitional (GB531207112400)
Shellfish water
Ribble
2024 spills / hours
48 / 229
Long-term average
37.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 84 hours spilling →
Savick Bk, Trib of Ribble Est 22 84 down 54% 99%
College Road Eshe Road CSO 38109
Overflow on sewer network
Company site name
College Road/Eshe Road
EA ID / permit
UUP00520 · 016982755
Outlet location
SJ3028098550 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY MOUTH - transitional (GB641211630001)
Bathing water
Wallasey
2024 spills / hours
59 / 133
Long-term average
92.1 spills a year (monitored since 2018)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 83 hours spilling →
River Mersey Estuary 38 83 down 36% 100%
Cotebrook STW
Inlet overflow at sewage works
Sewage works
Cotebrook
Company site name
COTEBROOK SO
EA ID / permit
UUP00545 · 016810067
Outlet location
SJ5737065609 (OS grid reference) · View on Apple Maps
WFD catchment
Ash Brook (Source to Darley Brook) (GB112068060440)
2024 spills / hours
40 / 181
Long-term average
29.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 83 hours spilling →
Sandyford Brook 18 83 down 55% 100%
Wreay WwTW Wreay
Inlet overflow at sewage works
Sewage works
Wreay Wreay
Company site name
WREAY WwTW
EA ID / permit
UUP02180 · 017680463
Outlet location
NY4366248788 (OS grid reference) · View on Apple Maps
WFD catchment
Petteril d/s Blackrack Beck (GB102076074030)
2024 spills / hours
41 / 78
Long-term average
31.4 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 83 hours spilling →
The River Petteril 32 83 down 22% 100%
Outside 51 Church Street CSO 471JC
Overflow on sewer network
Company site name
Outside 51 Church Street (Davenham) CSO
EA ID / permit
UUP01488 · 016892455
Outlet location
SJ6644171121 (OS grid reference) · View on Apple Maps
WFD catchment
Dane (Wheelock to Weaver) (GB112068060470)
2024 spills / hours
51 / 127
Long-term average
77.8 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 83 hours spilling →
Eldersbriar Brook 52 83 up 2% 98%
Crowland Street Pumping Station
Storm discharge at pumping station
Company site name
Crowland Street PS
EA ID / permit
UUP00577 · 016931043
Outlet location
SD3671016650 (OS grid reference) · View on Apple Maps
WFD catchment
Three Pool's Waterway (GB112070064830)
Bathing water
Southport
Shellfish water
Ribble
2024 spills / hours
21 / 92
Long-term average
50.6 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 82 hours spilling →
Three Pool Waterway 12 82 down 43% 99%
Talkin WwTW
Storm tank at sewage works
Sewage works
Talkin
Company site name
TALKIN WwTW
EA ID / permit
UUP01896 · 017670095
Outlet location
NY5475057700 (OS grid reference) · View on Apple Maps
WFD catchment
Gelt (GB102076074040)
2024 spills / hours
39 / 50
Long-term average
43.5 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 82 hours spilling →
Willy Beck 45 82 up 15% 100%
Thicketford CSO 072UX
Overflow on sewer network
Company site name
Thicketford CSO
EA ID / permit
UUP01928 · 016982835
Outlet location
SD7357010430 (OS grid reference) · View on Apple Maps
WFD catchment
Bradshaw Brook (GB112069064580)
2024 spills / hours
51 / 146
Long-term average
38.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 82 hours spilling →
Bradshaw Brook 30 82 down 41% 100%
Ribbleton Lane CSO 33103
Overflow on sewer network
Company site name
Ribbleton Lane CSO
EA ID / permit
UUP01649 · 017160312
Outlet location
SD5528028740 (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
14 / 96
Long-term average
15.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 81 hours spilling →
River Ribble (Tidal) via a surface water sewer 10 81 down 29% 100%
Macdermott Road Pumping Station
Storm discharge at pumping station
Company site name
MacDermott Road Pumping Station (formerly Dock Street PS)
EA ID / permit
UUP00648 · 016980998
Outlet location
SJ5091083850 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY - Transitional (GB531206908100)
2024 spills / hours
17 / 62
Long-term average
14.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 81 hours spilling →
River Mersey Estuary 7 81 down 59% 100%
Witton Tanks CSO
Overflow on sewer network
Company site name
Witton Tanks CSO
EA ID / permit
UUP02156 · 017180642
Outlet location
SD6672027570 (OS grid reference) · View on Apple Maps
WFD catchment
Blakewater (GB112071065310)
2024 spills / hours
47 / 105
Long-term average
49.2 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 81 hours spilling →
River Blakewater 41 81 down 13% 100%
Bradley Lane CSO (M.H.830)
Overflow on sewer network
Company site name
Bradley Lane CSO
EA ID / permit
UUP00297 · 017091499
Outlet location
SD5747311253 (OS grid reference) · View on Apple Maps
WFD catchment
Douglas - Mid (GB112070064780)
2024 spills / hours
44 / 109
Long-term average
74.2 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 80 hours spilling →
Bradley Brook (tributary of River Douglas) 51 80 up 16% 99%
Foxdenton Lane CSO
Overflow on sewer network
Company site name
Foxdenton Lane CSO
EA ID / permit
UUP00755 · 016983136
Outlet location
SD8957004540 (OS grid reference) · View on Apple Maps
WFD catchment
Wince Brook (GB112069061120)
2024 spills / hours
58 / 88
Long-term average
74.7 spills a year (monitored since 2020)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, Operational investigation completed
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 80 hours spilling →
Wince Brook 52 80 down 10% 97%
Low Hesket PS
Storm discharge at pumping station
Company site name
Low Hesket PS
EA ID / permit
UUP01195 · 017680337
Outlet location
NY4636046470 (OS grid reference) · View on Apple Maps
WFD catchment
Petteril d/s Blackrack Beck (GB102076074030)
2024 spills / hours
33 / 168
Long-term average
30.7 spills a year (monitored since 2020)
Monitor below 90%
Sensor failure / issue · Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 80 hours spilling →
Barrock Gill 23 80 down 30% 64%
Middlewich Rd/Parkfield Rd CSO
Overflow on sewer network
Company site name
Middlewich Road/Parkfield Road CSO
EA ID / permit
UUP01301 · 016892279
Outlet location
SJ6697873249 (OS grid reference) · View on Apple Maps
WFD catchment
Arley Brook (Source to Gale Brook) (GB112068060420)
2024 spills / hours
53 / 101
Long-term average
66.2 spills a year (monitored since 2021)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Monitor below 90%
Sensor failure / issue · Resolved - Jul
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 80 hours spilling →
River Dane via SWS 56 80 up 6% 88%
Chatsworth Avenue SPS BPL0038
Storm discharge at pumping station
Company site name
Chatsworth Avenue PS
EA ID / permit
UUP00455 · 017260171
Outlet location
SD3012047280 (OS grid reference) · View on Apple Maps
WFD catchment
MERSEY MOUTH - coastal (GB641211630001)
Bathing water
Bispham; Cleveleys; Fleetwood
Shellfish water
Lune (Wyre Estuary); Lune (Broadfleet and Plover Scar)
2024 spills / hours
25 / 63
Long-term average
48.3 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 80 hours spilling →
Irish Sea 32 80 up 28% 100%
Golf Road Pumping Station
Storm discharge at pumping station
Company site name
Golf Road PS
EA ID / permit
UUP00814 · 016892329
Outlet location
SJ7778087790 (OS grid reference) · View on Apple Maps
WFD catchment
Timperley Brook (GB112069061260)
2024 spills / hours
50 / 106
Long-term average
55.0 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 79 hours spilling →
Timperley Brook 35 79 down 30% 100%
Bewsey Bridge CSO (Bewsy)
Overflow on sewer network
Company site name
Lodge Lane, Bewsey CSO
EA ID / permit
UUP01166 · 016993700
Outlet location
SJ5924389433 (OS grid reference) · View on Apple Maps
WFD catchment
Sankey Brook (Rainford Brook to Mersey) (GB112069061200)
2024 spills / hours
36 / 199
Long-term average
30.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 79 hours spilling →
Sankey Brook 15 79 down 58% 99%

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.