Storm overflow register · 2025 annual return

Anglian Water storm overflows, 2025

Anglian Water reported 1,442 storm overflows in England for 2025. Together they recorded 17,322 spills over 105,806 hours, an average of 12.0 spills per overflow against 20.4 across England. That ranks 1 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 61% on 2024.

244 overflows did not spill · 38 spilled more than 60 times · 1,323 had monitors working for 90% of the year or more · 419 sewage treatment works with overflows

Hours spilling by month, 2025

010k20k30k40kJan 2025: 32,000 hours spillingJanFeb 2025: 10,152 hours spillingFebMar 2025: 1,794 hours spillingMarApr 2025: 1,375 hours spillingAprMay 2025: 789 hours spillingMayJun 2025: 1,209 hours spillingJunJul 2025: 3,556 hours spillingJulAug 2025: 359 hours spillingAugSep 2025: 1,848 hours spillingSepOct 2025: 2,287 hours spillingOctNov 2025: 24,856 hours spillingNovDec 2025: 25,568 hours spillingDec
Hours spilling, all Anglian Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Anglian Water storm overflows

Sorted by hours spilling. Open an overflow for its permit, location, reasons for high spills and improvement status.

OverflowDischarges toSpills 2025Hours 2025Spills vs 2024Monitor uptime
Bradwell-on-Sea STW
Inlet overflow at sewage works
Sewage works
Bradwell On Sea
Company site name
BRADWELL ON SEA STW
EA ID / permit
AWS00118 · AW2NFE14366
Outlet location
TL9929007400 (OS grid reference) · View on Apple Maps
WFD catchment
BLACKWATER (GB520503714000)
2024 spills / hours
10 / 122
Long-term average
10.3 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Trib of Bradwell Creek 0 0.0 down 100% 100%
Canvey - Champlain Avenue PS
Storm discharge at pumping station
Company site name
CANVEY-CHAMPLAIN AVE SP
EA ID / permit
AWS00194 · ASETS2195
Outlet location
TQ7888083960 (OS grid reference) · View on Apple Maps
WFD catchment
THAMES LOWER (GB530603911401)
2024 spills / hours
0 / 0.0
Long-term average
1.6 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
The Drain-Ditch Totidal Water 0 0.0 no change 100%
Chalkwell Esplanade Outfall
Overflow on sewer network
Company site name
SOUTHEND-CHALKWELL/RIDGEWAY OV
EA ID / permit
AWS00211 · S/WR73
Outlet location
TQ8575085280 (OS grid reference) · View on Apple Maps
WFD catchment
THAMES LOWER (GB530603911401)
2024 spills / hours
2 / 3.0
Long-term average
1.0 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Thames Estuary 0 0.0 down 100% 100%
Chelmsford - N Mlbn Chignal Road PS
Storm discharge at pumping station
Company site name
CHELMSFORD-N MLBN CHIGNAL R SP
EA ID / permit
AWS00218 · ASENF2502
Outlet location
TL6851008900 (OS grid reference) · View on Apple Maps
WFD catchment
Chignall Brook (GB105037033650)
2024 spills / hours
2 / 4.8
Long-term average
2.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
The One Bridge Brook 0 0.0 down 100% 100%
Chelmsford-Butts Way PS
Storm discharge at pumping station
Company site name
CHELMSFORD-BUTTS WAY SP
EA ID / permit
AWS00221 · ASENF10378
Outlet location
TL6932003690 (OS grid reference) · View on Apple Maps
WFD catchment
Wid (Margaretting Hall - R. Can) (GB105037033900)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
River Wid 0 0.0 no change 100%
Colchester-East Bay Main Int CSO
Overflow on sewer network
Company site name
COLCHESTER-EAST BAY MAIN INT
EA ID / permit
AWS00261 · AW2TSE03384
Outlet location
TM0081025080 (OS grid reference) · View on Apple Maps
WFD catchment
COLNE (GB520503713800)
2024 spills / hours
8 / 4.5
Long-term average
5.2 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
River Colne 0 0.0 down 100% 100%
Eight Ash Green - Heathfields SPS
Storm discharge at pumping station
Company site name
EIGHT ASH GREEN-HEATHFIELDS SP
EA ID / permit
AWS00392 · ASENF2371
Outlet location
TL9463025980 (OS grid reference) · View on Apple Maps
WFD catchment
Colne (d/s Doe's Corner) (GB105037041330)
2024 spills / hours
3 / 21
Long-term average
3.4 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Trib of River Colne 0 0.0 down 100% 100%
Great Cornard STW
Storm tank at sewage works
Sewage works
Great Cornard
EA ID / permit
AWS00491 · AW2NF148
Outlet location
TL8820038700 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Wixoe - Lamarsh) (GB105036040941)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Cornard Black Brook 0 0.0 no change 100%
Great Totham STW
Storm tank at sewage works
Sewage works
Great Totham
EA ID / permit
AWS00507 · ASENF1576
Outlet location
TL8645011580 (OS grid reference) · View on Apple Maps
WFD catchment
Essex Gravels (GB40503G000400)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Spicketts Brook Nt Blackwater 0 0.0 no change 100%
Notley Road CSO
Overflow on sewer network
Company site name
BRAINTREE-NOTLEY RD CSO
EA ID / permit
AWS00946 · ASENF12355
Outlet location
TL7588022620 (OS grid reference) · View on Apple Maps
WFD catchment
Brain (GB105037041140)
2024 spills / hours
1 / 0.3
Long-term average
0.3 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
The River Brain 0 0.0 down 100% 100%
Rayne Terminal Pumping Station
Storm discharge at pumping station
Company site name
RAYNE-TPS
EA ID / permit
AWS01039 · ASENF15794
Outlet location
TL7336023290 (OS grid reference) · View on Apple Maps
WFD catchment
Brain (GB105037041140)
2024 spills / hours
1 / 0.3
Long-term average
5.2 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Pods Brook 0 0.0 down 100% 100%
Riverside Road CSO
Overflow on sewer network
Company site name
IPSWICH-RIVERSIDE RD CSO
EA ID / permit
AWS01054 · ASENF12154
Outlet location
TM1465045260 (OS grid reference) · View on Apple Maps
WFD catchment
Gipping (d/s Stowmarket) (GB105035046280)
2024 spills / hours
8 / 32
Long-term average
4.0 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
River Gipping 0 0.0 down 100% 100%
Scotts Hall Road
Storm discharge at pumping station
Company site name
ROCHFORD-SCOTTS HALL RD SP
EA ID / permit
AWS01110 · ASENF2585
Outlet location
TQ8960093500 (OS grid reference) · View on Apple Maps
WFD catchment
Roach (GB105037028742)
2024 spills / hours
13 / 31
Long-term average
5.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Trib River Roach 0 0.0 down 100% 100%
Thorrington Water Recycling Centre
Inlet overflow at sewage works
Sewage works
Thorrington
Company site name
THORRINGTON WRC
EA ID / permit
AWS01376 · AW2NFE02070
Outlet location
TM0796020530 (OS grid reference) · View on Apple Maps
WFD catchment
Tenpenny Brook (GB105037041310)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Ouse (Newport Pagnell to Roxton) 0 0.0 no change 100%
Fakenham (Old and New) WRC
Storm tank at sewage works
Sewage works
Fakenham
Company site name
Fakenham (Old and New) Water Recycling Centre
EA ID / permit
AWS00425 · AEENF15448
Outlet location
TF9226029180 (OS grid reference) · View on Apple Maps
WFD catchment
Wensum US Norwich (GB105034055881)
2024 spills / hours
42 / 844
Long-term average
28.8 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
River Wensum 0 0.0 down 100% 100%
Great Bentley - Thorrington Road PS
Storm discharge at pumping station
Company site name
GT BENTLEY-THORRINGTON RD SP
EA ID / permit
AWS00482 · ASENF10407
Outlet location
TM1036021720 (OS grid reference) · View on Apple Maps
WFD catchment
Holland Brook (GB105037077810)
2024 spills / hours
69 / 1,369
Long-term average
36.5 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Operational improvement ongoing
Bentley Brook 0 0.0 down 100% 100%
Great Wenham STW
Storm tank at sewage works
Sewage works
Great Wenham
EA ID / permit
AWS00513 · ASENF1284
Outlet location
TM0749037920 (OS grid reference) · View on Apple Maps
WFD catchment
Stutton Brook (GB105036040890)
2024 spills / hours
2 / 3.2
Long-term average
1.3 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
UWWTR improvement ongoing
Tributary of Stutton Brook 0 0.0 down 100% 100%
Holbrook STW
Storm tank at sewage works
Sewage works
Holbrook
EA ID / permit
AWS00605 · AW2TS184
Outlet location
TM1740034660 (OS grid reference) · View on Apple Maps
WFD catchment
STOUR (ESSEX) (GB520503613602)
2024 spills / hours
0 / 0.0
Long-term average
2.5 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Holbrook Creek Estuary Stour 0 0.0 no change 100%
Islip Pumping Station
Storm discharge at pumping station
Company site name
ISLIP SP
EA ID / permit
AWS00658 · AWNNF2406
Outlet location
SP9904078610 (OS grid reference) · View on Apple Maps
WFD catchment
Nene - conf Ise to Islip (GB105032050383)
2024 spills / hours
7 / 38
Long-term average
2.7 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
River Nene 0 0.0 down 100% 100%
Kings Lynn WRC
Storm tank at sewage works
Sewage works
Kings Lynn
Company site name
KINGS LYNN STW
EA ID / permit
AWS00692 · AECTS3037/11334
Outlet location
TF6053522225 (OS grid reference) · View on Apple Maps
WFD catchment
GREAT OUSE (GB530503300300)
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Bathing Water and/or Shellfish Water improvement ongoing
Tidal River Great Ouse 0 0.0 no change 100%
Maldon Park Drive CSO
Overflow on sewer network
Company site name
Maldon Park Drive CSO
EA ID / permit
AWS00802 · AW2NFE03278
Outlet location
TL8649006050 (OS grid reference) · View on Apple Maps
WFD catchment
BLACKWATER (GB520503714000)
2024 spills / hours
0 / 0.0
Long-term average
10.3 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
River Blackwater via A Lagoon 0 0.0 no change 100%
Newmarket Water Recycling Centre
Inlet overflow at sewage works
Sewage works
Newmarket
Company site name
Newmarket Water Recycling Centre
EA ID / permit
AWS00877 · AW1NF2476
Outlet location
TL6349067000 (OS grid reference) · View on Apple Maps
WFD catchment
Soham Lode (GB105033042860)
2024 spills / hours
7 / 28
Long-term average
2.6 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
UWWTR improvement ongoing
Newmarket No.1 Public Drain 0 0.0 down 100% 100%
Poppyhill WRC
Storm tank at sewage works
Sewage works
Poppyhill
Company site name
POPPYHILL STW
EA ID / permit
AWS01002 · AW1NF2418
Outlet location
TL1838038640 (OS grid reference) · View on Apple Maps
WFD catchment
Ivel (DS Langford to Roxton) (GB105033038170)
2024 spills / hours
33 / 492
Long-term average
14.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
UWWTR improvement ongoing
The River Ivel 0 0.0 down 100% 100%
Shenfield and Hutton WRC
Inlet overflow at sewage works
Sewage works
Shenfield And Hutton
Company site name
SHENFIELD AND HUTTON STW
EA ID / permit
AWS01120 · ASENF10453
Outlet location
TQ6515095970 (OS grid reference) · View on Apple Maps
WFD catchment
Wid (Doddinghurst Brook - Shenfield STW) (GB105037028680)
2024 spills / hours
8 / 35
Long-term average
8.0 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
River Wid 0 0.0 down 100% 100%
Ramsey Island St Lawrence Drive PS
Storm discharge at pumping station
Company site name
Ramsey Island St.Lawrence Drive Pumping Station
EA ID / permit
AWS01026 · ASENF16188
Outlet location
TL9499006030 (OS grid reference) · View on Apple Maps
WFD catchment
Blackwater (Combined Essex) (GB105037041160)
Shellfish water
Osea Island
2024 spills / hours
1 / 3.3
Long-term average
1.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Motts Farm Drain 0 0.0 down 100% 100%
Louth-James Street CSO
Overflow on sewer network
Company site name
LOUTH-JAMES ST SSO
EA ID / permit
AWS00777 · ANNNF13588
Outlet location
TF3320087690 (OS grid reference) · View on Apple Maps
WFD catchment
Louth Canal (GB104029061990)
2024 spills / hours
6 / 3.7
Long-term average
11.5 spills a year (monitored since 2020)
Monitor below 90%
Comms failure / issue · Resolved - May
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
River Lud 0 0.0 down 100% 88%
Mettleham STW, Inlet Sewer
Inlet overflow at sewage works
Sewage works
Mettleham Sewer
Company site name
NETTLEHAM WRC
EA ID / permit
AWS00840 · ANNNF2402
Outlet location
TF0185075830 (OS grid reference) · View on Apple Maps
WFD catchment
Nettleham Beck (GB105030062210)
2024 spills / hours
21 / 489
Long-term average
10.5 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Mar
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Nettleham Beck 0 0.0 down 100% 74%
Sports Centre Mill Rd.
Overflow on sewer network
Company site name
COLCHESTER-NORTH GATE OV
EA ID / permit
AWS01221 · AW2NFC296
Outlet location
TM0060028888 (OS grid reference) · View on Apple Maps
WFD catchment
Salary Brook (GB105037041320)
2024 spills / hours
1 / 0.3
Long-term average
0.5 spills a year (monitored since 2024)
Monitor below 90%
Telemetry or data archiving failure / issue · Resolved - Aug
Investigation
Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Tendring Streams 0 0.0 down 100% 38%
Broughton(Lincs) STW
Storm tank at sewage works
Sewage works
Broughton
Company site name
BROUGHTON STW (HUMBER)
EA ID / permit
AWS00162 · ANNNF13474
Outlet location
SE9855010420 (OS grid reference) · View on Apple Maps
WFD catchment
Ancholme from Bishopbridge to the Humber (GB104029067520)
2024 spills / hours
5 / 4.2
Long-term average
3.0 spills a year (monitored since 2022)
Monitor below 90%
Telemetry or data archiving failure / issue · Resolved - Aug
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Ancholme 0 0.0 down 100% 38%
West Bergholt STW
Storm tank at sewage works
Sewage works
West Bergholt
Company site name
W BERGHOLT STW
EA ID / permit
AWS01469 · AW2NF335
Outlet location
TL9596026570 (OS grid reference) · View on Apple Maps
WFD catchment
Colne (d/s Doe's Corner) (GB105037041330)
2024 spills / hours
37 / 698
Long-term average
24.7 spills a year (monitored since 2022)
Monitor below 90%
Sensor failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Colne Nt – – 0%
Buckingham Hunter Street CSO
Overflow on sewer network
Company site name
Buckingham - Hunter Street Combined Sewer Overflow
EA ID / permit
AWS00167 · EPRRB3194RX
Outlet location
SP6930233437 (OS grid reference) · View on Apple Maps
WFD catchment
Ouse (Brackley to Buckingham) (GB105033037860)
2024 spills / hours
1 / 2.8
Long-term average
0.5 spills a year (monitored since 2022)
Monitor below 90%
Comms failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Great Ouse 0 0.0 down 100% 79%
Buckingham-West Street CSO
Overflow on sewer network
Company site name
BUCKINGHAM- WEST STREET SSO
EA ID / permit
AWS00169 · AWCNF1604
Outlet location
SP6941033890 (OS grid reference) · View on Apple Maps
WFD catchment
Ouse (Brackley to Buckingham) (GB105033037860)
2024 spills / hours
1 / 0.5
Long-term average
0.2 spills a year (monitored since 2020)
Monitor below 90%
Comms failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Great River Ouse 0 0.0 down 100% 78%
Catmose Vale Road CSO
Overflow on sewer network
Company site name
OAKHAM-CATMOSE VALE ROAD SSO
EA ID / permit
AWS00209 · AW5NF524
Outlet location
SK8663008290 (OS grid reference) · View on Apple Maps
WFD catchment
North Gwash (GB105031050490)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Jun
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Gwash 0 0.0 no change 66%
Corby Studfall Avenue CSO
Overflow on sewer network
Company site name
CORBY-STUDFALL AVENUE SSO
EA ID / permit
AWS00277 · AW5NF463
Outlet location
SP8860090170 (OS grid reference) · View on Apple Maps
WFD catchment
Northern Stream (GB105032045590)
2024 spills / hours
3 / 11
Long-term average
1.3 spills a year (monitored since 2020)
Monitor below 90%
Comms failure / issue · Scheduled
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib Willow Brook 0 0.0 down 100% 60%
Desborough-Near Corset Factory CSO
Overflow on sewer network
Company site name
DESBOROUGH-CORSET FACTORY SSO
EA ID / permit
AWS00332 · AW5NF2122
Outlet location
SP8050082680 (OS grid reference) · View on Apple Maps
WFD catchment
Ise - Upper (GB105032045200)
2024 spills / hours
31 / 142
Long-term average
15.5 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Jun
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Nene 0 0.0 down 100% 52%
Grantham - Bridge End Grove CSO
Overflow on sewer network
Company site name
Grantham - Bridge End Grove CSO
EA ID / permit
AWS00477 · EPRJB3692VK
Outlet location
SK9243034570 (OS grid reference) · View on Apple Maps
WFD catchment
Witham - conf Cringle Bk to conf Brant (GB105030056780)
2024 spills / hours
2 / 0.5
Long-term average
1.3 spills a year (monitored since 2022)
Monitor below 90%
Power failure / issue · Resolved - Jul
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Witham 0 0.0 down 100% 64%
Hullbridge - Keswick Avenue CSO
Overflow on sewer network
Company site name
HULLBRIDGE-KESWICK AVENUE
EA ID / permit
AWS00623 · AW2NFE04179
Outlet location
TQ8139095000 (OS grid reference) · View on Apple Maps
WFD catchment
CROUCH (GB520503704100)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2021)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · Overflow no longer spilling to environment - from Dec
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Tributary of the River Crouch 0 0.0 no change 100%
Ibbett Close PS
Storm discharge at pumping station
Company site name
Kempston-Ibbetts Close SP
EA ID / permit
AWS00634 · AW1NF1302
Outlet location
TL0110047050 (OS grid reference) · View on Apple Maps
WFD catchment
Ouse (Newport Pagnell to Roxton) (GB105033047923)
2024 spills / hours
– / –
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
Telemetry or data archiving failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Ouse – – 0%
Little Houghton SSO
Overflow on sewer network
Company site name
LITTLE HOUGHTON-MEADOW LANE SSO
EA ID / permit
AWS00751 · AW5NF2044
Outlet location
SP8004059950 (OS grid reference) · View on Apple Maps
WFD catchment
Nene - conf Brampton Branch to conf Ise (GB105032045050)
2024 spills / hours
1 / 0.3
Long-term average
0.5 spills a year (monitored since 2024)
Monitor below 90%
Installation set-up/design issue · Resolved - Sep
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Unknown trib. River Nene 0 0.0 down 100% 85%
Park Road SSO
Overflow on sewer network
Company site name
TODDINGTON-PARK RD SSO
EA ID / permit
AWS00972 · AWCNF10009
Outlet location
TL0069029430 (OS grid reference) · View on Apple Maps
WFD catchment
Flit (GB105033037640)
2024 spills / hours
2 / 0.5
Long-term average
1.0 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Jul
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Flit 0 0.0 down 100% 45%
Roade SO
Overflow on sewer network
Company site name
ROADE SO SSO
EA ID / permit
AWS01055 · AW1NF391
Outlet location
SP7570051600 (OS grid reference) · View on Apple Maps
WFD catchment
Tove (DS Greens Norton) (GB105033038180)
2024 spills / hours
5 / 2.3
Long-term average
2.5 spills a year (monitored since 2024)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · Overflow no longer spilling to environment - from Jul
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Tove (Ds Greens Norton) 0 0.0 down 100% 14%
Runwell-Downham Road CSO
Overflow on sewer network
Company site name
Runwell - Downham Road Combined Sewer Overflow
EA ID / permit
AWS01075 · ASENF12107
Outlet location
TQ7459094780 (OS grid reference) · View on Apple Maps
WFD catchment
Crouch (d/s Wickford) (GB105037028550)
2024 spills / hours
8 / 3.8
Long-term average
2.8 spills a year (monitored since 2021)
Monitor below 90%
Power failure / issue · Resolved - Dec
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
tributary River Crouch 0 0.0 down 100% 71%
Sherwood Avenue SSO
Overflow on sewer network
Company site name
PETERBOROUGH-SHERWOOD AVE SSO
EA ID / permit
AWS01125 · AW5NF1797
Outlet location
TL1905097180 (OS grid reference) · View on Apple Maps
WFD catchment
Stanground Lode (GB105032050340)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Jun
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Fletton Spring 0 0.0 no change 52%
SO Fordham
Overflow on sewer network
Company site name
FORDHAM-CARTER STREET OV
EA ID / permit
AWS01150 · AW1NF120
Outlet location
TL6000070000 (OS grid reference) · View on Apple Maps
WFD catchment
Burwell Lode (GB105033042720)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
Comms failure / issue · Resolved - Sep
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Snall 0 0.0 no change 69%
Station Rd SSO E Barton
Overflow on sewer network
Company site name
EARLS BARTON BLACKWELL CL SSO
EA ID / permit
AWS01284 · AW5NF2031
Outlet location
SP8575062130 (OS grid reference) · View on Apple Maps
WFD catchment
Nene - conf Brampton Branch to conf Ise (GB105032045050)
2024 spills / hours
43 / 190
Long-term average
21.5 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Jun
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Nene 0 0.0 down 100% 55%
Stone Street TPS
Storm discharge at pumping station
Company site name
BOXFORD-STONE ST TPS
EA ID / permit
AWS01306 · ASENF12330
Outlet location
TL9650039840 (OS grid reference) · View on Apple Maps
WFD catchment
Box (GB105036040920)
2024 spills / hours
2 / 25
Long-term average
1.0 spills a year (monitored since 2024)
Monitor below 90%
Comms failure / issue · Resolved - Aug
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
The River Box 0 0.0 down 100% 72%
Wollaston (8250) SSO
Overflow on sewer network
Company site name
WOLLASTON-PYGHTLES SSO
EA ID / permit
AWS01531 · AW5NF2035
Outlet location
SP9082062300 (OS grid reference) · View on Apple Maps
WFD catchment
Nene - conf Brampton Branch to conf Ise (GB105032045050)
2024 spills / hours
3 / 0.8
Long-term average
1.5 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Aug
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Trib River Nene 0 0.0 down 100% 62%
Diss Uplands Way CSO
Overflow on sewer network
Company site name
Uplands Way CSO
EA ID / permit
AWS01556 · AW4NF929X
Outlet location
TM1186079390 (OS grid reference) · View on Apple Maps
WFD catchment
Waveney (u/s Frenze Beck) (GB105034045820)
2024 spills / hours
26 / 351
Long-term average
13.0 spills a year (monitored since 2024)
Monitor below 90%
Power failure / issue · Resolved - Aug
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Waveney 0 0.0 down 100% 63%
Norwich Dereham Road SSO
Overflow on sewer network
EA ID / permit
AWS01569 · Permit Applied For
Outlet location
TG2175009860 (OS grid reference) · View on Apple Maps
WFD catchment
RIVER WENSUM (GB105034055882)
2024 spills / hours
5 / 6.3
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
No longer operational as an overflow - permit revoked or to be revoked · Overflow no longer spilling to environment - from Jan
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Wensum – – 0%
Huntingdon Sapley Rd Combined Sewage Overflow
Overflow on sewer network
Company site name
Huntingdon Sapley Rd CSO
EA ID / permit
AWS01575 · EPR/RB3191EF
Outlet location
TL2562372542 (OS grid reference) · View on Apple Maps
WFD catchment
Bury Brook (GB105033043140)
2024 spills / hours
5 / 63
Long-term average
0.0 spills a year (monitored since 2024)
Monitor below 90%
Installation set-up/design issue · Resolved - January after reporting year
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
River Great Ouse 0 0.0 down 100% 15%

Sewage treatment works

Storm tanks and inlet overflows at each Anglian Water sewage works. The figures are 2025 spills.

← All water companies · Contains Environment Agency data licensed under the Open Government Licence v3.0. How to read the data.