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

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.

Overflow	Discharges to	Spills 2025	Hours 2025	Spills vs 2024	Monitor uptime
Chippenham STW Inlet overflow at sewage works Sewage works Chippenham EA ID / permit AWS00226 · AW1NF482 Outlet location TL6666070190 (OS grid reference) · View on Apple Maps WFD catchment Lee Brook (GB105033042970) 2024 spills / hours 11 / 15 Long-term average 10.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.8 hours spilling →	River Kennett	7	8.8	down 36%	100%
Cliftonville SSO Overflow on sewer network Company site name NORTHAMPTON-CLIFTONVILLE SSO EA ID / permit AWS00246 · AW5NF1830 Outlet location SP7705059800 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Brampton Branch to conf Ise (GB105032045050) 2024 spills / hours 22 / 54 Long-term average 16.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.8 hours spilling →	River Nene(Flood Channel)	11	8.8	down 50%	100%
Needham Market Water Recycling Cntr Storm tank at sewage works Sewage works Needham Market Water Recycling Cntr Company site name NEEDHAM MARKET STW EA ID / permit AWS00866 · ASENF1378 Outlet location TM0943054880 (OS grid reference) · View on Apple Maps WFD catchment Gipping (d/s Stowmarket) (GB105035046280) 2024 spills / hours 11 / 42 Long-term average 7.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 8.6 hours spilling →	The River Gipping Nt	4	8.6	down 64%	99%
West Mersea Water Recycling Centre Storm tank at sewage works Sewage works West Mersea Company site name West Mersea Water Recycling Centre EA ID / permit AWS01474 · ASETS1320 Outlet location TM0301012100 (OS grid reference) · View on Apple Maps WFD catchment Blackwater Outer (GB650503200000) Bathing water West Mersea 2024 spills / hours 29 / 95 Long-term average 19.0 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.6 hours spilling →	The Blackwater Estuary	6	8.6	down 79%	100%
Outwood Common CSO Overflow on sewer network Company site name BILLERICAY EAST-OUTWOOD COMM EA ID / permit AWS00962 · ASENF16480 Outlet location TQ6920094310 (OS grid reference) · View on Apple Maps WFD catchment Crouch (A129 - Wickford) (GB105037028540) 2024 spills / hours 14 / 39 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 Volume & pollution Estimate from 8.5 hours spilling →	Outwood Common Trib R Crouch	7	8.5	down 50%	100%
Outlet at Grey'S Mill Overflow on sewer network Company site name KELVEDON-GREYS MILL SO EA ID / permit AWS00961 · AW2NFE05179 Outlet location TL8607018170 (OS grid reference) · View on Apple Maps WFD catchment Blackwater (Combined Essex) (GB105037041160) 2024 spills / hours 18 / 41 Long-term average 14.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.5 hours spilling →	River Blackwater	11	8.5	down 39%	100%
SSO Overflow on sewer network Company site name BOZEAT-SPRING VALE SSO EA ID / permit AWS01231 · AW5NF1800 Outlet location SP9045059280 (OS grid reference) · View on Apple Maps WFD catchment Grendon Brook (GB105032045040) 2024 spills / hours 16 / 8.5 Long-term average 11.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.5 hours spilling →	Grendon Brook	6	8.5	down 63%	100%
Croyland Rd SSO Overflow on sewer network Company site name WELLINGBOROUGH-CROYLAND RD SSO EA ID / permit AWS00302 · AWNNF10522 Outlet location SP8882067410 (OS grid reference) · View on Apple Maps WFD catchment Swanspool Brook (GB105032045070) 2024 spills / hours 0 / 0.0 Long-term average 3.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.3 hours spilling →	Swanspool Brook	4	8.3	up from 0	93%
North Walsham STW Storm tank at sewage works Sewage works North Walsham EA ID / permit AWS00902 · AEECS/12410 Outlet location TG3003030560 (OS grid reference) · View on Apple Maps WFD catchment North Walsham and Dilham Canal (disused) (GB105034055710) 2024 spills / hours 6 / 9.7 Long-term average 5.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.2 hours spilling →	Dilham Canal	2	8.2	down 67%	100%
Lincoln Brayford Way PS Storm discharge at pumping station Company site name Lincoln Brayford Way Pumping Station EA ID / permit AWS00735 · ANNNF13386 Outlet location SK9704071270 (OS grid reference) · View on Apple Maps WFD catchment Skellingthorpe Main Drain (GB105030062390) 2024 spills / hours 7 / 8.6 Long-term average 8.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	Brayford Pool	4	8.0	down 43%	100%
School Lane SPS Aby Storm discharge at pumping station Company site name ABY-SCHOOL LA TPS EA ID / permit AWS01107 · ANNNF2581 Outlet location TF4142078410 (OS grid reference) · View on Apple Maps WFD catchment Woldgrift Drain (GB105029061750) 2024 spills / hours 0 / 0.0 Long-term average 1.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	Un-Named Dyke to Great Eau	2	8.0	up from 0	100%
Vicarage La Gt Baddow Overflow on sewer network Company site name GT BADDOW VICARAGE LANE OV EA ID / permit AWS01422 · ASENF12076 Outlet location TL7261004290 (OS grid reference) · View on Apple Maps WFD catchment Chelmer (d/s confluence with Can) (GB105037033530) 2024 spills / hours 0 / 0.0 Long-term average 1.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	Baddow Brook	2	8.0	up from 0	99%
Lowestoft Belvedere Road CSO Overflow on sewer network Company site name Lowestoft Belvedere Road Combined Sewer Overflow EA ID / permit AWS00786 · ASETS16995 Outlet location TM5444092670 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) Bathing water Lowestoft (North of Claremont Pier) 2024 spills / hours 64 / 39 Long-term average 33.1 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 7.9 hours spilling →	Inner Harbour to North Sea	47	7.9	down 27%	100%
Woodbridge Deben Road CSO Overflow on sewer network Company site name Woodbridge Deben Road CSO EA ID / permit AWS01534 · AW4TS1417 Outlet location TM2779049150 (OS grid reference) · View on Apple Maps WFD catchment DEBEN (GB520503503900) Shellfish water Deben 2024 spills / hours 40 / 21 Long-term average 34.4 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 7.8 hours spilling →	River Deben Tidal	17	7.8	down 58%	100%
Skates Hill PS Storm discharge at pumping station Company site name GLEMSFORD-SKATES HILL SP EA ID / permit AWS01138 · ASENF10118 Outlet location TL8289046710 (OS grid reference) · View on Apple Maps WFD catchment Stour (Wixoe - Lamarsh) (GB105036040941) 2024 spills / hours 6 / 12 Long-term average 6.0 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 Volume & pollution Estimate from 7.8 hours spilling →	unnamed trib River Stour	4	7.8	down 33%	100%
Wivenhoe-Phillip Road CSO Overflow on sewer network Company site name WIVENHOE-PHILLIP RD OV EA ID / permit AWS01526 · ASETS19248 Outlet location TM0405021620 (OS grid reference) · View on Apple Maps WFD catchment COLNE (GB520503713800) 2024 spills / hours 46 / 149 Long-term average 21.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 7.8 hours spilling →	Tidal River Colne	4	7.8	down 91%	98%
Braintree Water Recycling Centre Storm discharge at pumping station Company site name BRAINTREE-NOTLEY RD SP EA ID / permit AWS00122 · AW2NFE13767 Outlet location TL7588022620 (OS grid reference) · View on Apple Maps WFD catchment Brain (GB105037041140) 2024 spills / hours 38 / 212 Long-term average 22.5 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 Volume & pollution Estimate from 7.8 hours spilling →	River Brain Nt	7	7.8	down 82%	100%
Raunds SSO Overflow on sewer network Company site name RAUNDS-BROOK ST SSO EA ID / permit AWS01031 · AW5NF530 Outlet location SP9975072680 (OS grid reference) · View on Apple Maps WFD catchment Hog Dyke (GB105032045120) 2024 spills / hours 15 / 25 Long-term average 9.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.8 hours spilling →	Trib Hog Dyke	13	7.8	down 13%	100%
Mill Corner TPS Storm discharge at pumping station Company site name Soham - Mill Corner TPS EA ID / permit AWS00844 · AECNF2461 Outlet location TL5885073020 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 12 / 94 Long-term average 8.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.8 hours spilling →	The Soham Lode	5	7.8	down 58%	91%
Rayne STW Storm tank at sewage works Sewage works Rayne EA ID / permit AWS01038 · AW2NFE06965 Outlet location TL7324023490 (OS grid reference) · View on Apple Maps WFD catchment Brain (GB105037041140) 2024 spills / hours 4 / 7.9 Long-term average 4.3 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 Volume & pollution Estimate from 7.5 hours spilling →	Pods Brook River Brain Nt	6	7.5	up 50%	100%
E Tilbury Bata (Linford) Storm discharge at pumping station Company site name E TILBURY-BATA(LINFORD) TPS EA ID / permit AWS00364 · AW2NFE00981 Outlet location TQ6856078620 (OS grid reference) · View on Apple Maps WFD catchment THAMES MIDDLE (GB530603911402) 2024 spills / hours 12 / 119 Long-term average 8.2 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 Volume & pollution Estimate from 7.5 hours spilling →	Drainage Channel River Thames	2	7.5	down 83%	100%
Leiston - Waterloo Park CSO Overflow on sewer network Company site name Leiston - Waterloo Park CSO) EA ID / permit AWS00731 · EPRNB3694EQ Outlet location TM4523063300 (OS grid reference) · View on Apple Maps WFD catchment Leiston Beck (GB105035046271) 2024 spills / hours 23 / 15 Long-term average 20.0 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.5 hours spilling →	Leiston Beck	11	7.5	down 52%	81%
Warley West PS Storm discharge at pumping station Company site name WARLEY-WARLEY STREET SP EA ID / permit AWS01440 · ASENF16418 Outlet location TQ5867089900 (OS grid reference) · View on Apple Maps WFD catchment Mardyke (West Tributary) (GB106037028080) 2024 spills / hours 9 / 48 Long-term average 7.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.5 hours spilling →	Mardyke Trib of Thames Estuary	3	7.5	down 67%	100%
Clacton Victoria Road CSO Overflow on sewer network Company site name Clacton Victoria Road Combined Sewer Overflow EA ID / permit AWS00240 · AW2CS662 Outlet location TM1853015060 (OS grid reference) · View on Apple Maps WFD catchment Essex (GB650503520001) Bathing water Clacton 2024 spills / hours 18 / 14 Long-term average 8.4 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.4 hours spilling →	The North Sea	20	7.4	up 11%	95%
Brightlingsea Station Road CSO Overflow on sewer network Company site name Brightlingsea Station Road Combined Sewer Overflow EA ID / permit AWS00145 · ASENF3270/12166 Outlet location TM0812016640 (OS grid reference) · View on Apple Maps WFD catchment Colne Essex (GB520503713800) Bathing water Brightlingsea Shellfish water Colne 2024 spills / hours 10 / 2.4 Long-term average 15.9 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 7.4 hours spilling →	A Drain, A Tributary of Colne Estuary	15	7.4	up 50%	100%
Cardnells Sp, Maylandsea Storm discharge at pumping station Company site name MAYLANDSEA-CARDNELLS SP EA ID / permit AWS01571 · Permit Applied For Outlet location TL9065002705 (OS grid reference) · View on Apple Maps WFD catchment BLACKWATER (GB520503714000) 2024 spills / hours 1 / 3.5 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 Volume & pollution Estimate from 7.3 hours spilling →	Blackwater	1	7.3	no change	100%
Flore Overflow on sewer network Company site name FLORE SSO EA ID / permit AWS00443 · AW5NF2042 Outlet location SP6454059690 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Whilton Branch to conf Brampton Branch (GB105032045320) 2024 spills / hours 6 / 11 Long-term average 6.0 spills a year (monitored since 2024) Monitor below 90% Power failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.3 hours spilling →	Trib River Nene	6	7.3	no change	88%
Potterspury - Church End CSO Overflow on sewer network Company site name POTTERSBURY-CHURCH END SO- SSO EA ID / permit AWS01006 · AW1NF1126 Outlet location SP7616043290 (OS grid reference) · View on Apple Maps WFD catchment Potterspury Brook (GB105033037990) 2024 spills / hours 24 / 171 Long-term average 9.2 spills a year (monitored since 2021) 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 7.3 hours spilling →	Trib Great River Ouse	2	7.3	down 92%	61%
Railway Bridge Combined Sewer Overf Overflow on sewer network Company site name KIBWORTH-RAILWAY BRIDGE SSO EA ID / permit AWS01023 · AW5NF1869 Outlet location SP6890093530 (OS grid reference) · View on Apple Maps WFD catchment Langton Brook (GB105031045620) 2024 spills / hours 40 / 43 Long-term average 21.6 spills a year (monitored since 2021) Monitor below 90% Comms failure / issue · Resolved - Dec Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.3 hours spilling →	Langton Brook	14	7.3	down 65%	87%
Beccles - Caxton Sports Ground CSO Overflow on sewer network Company site name BECCLES-CAXTON SPTS GRND OV EA ID / permit AWS00065 · ASENF10090 Outlet location TM4266090740 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) 2024 spills / hours 12 / 9.5 Long-term average 9.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.3 hours spilling →	unnamed trib River Waveney	6	7.3	down 50%	99%
Stalham Water Recycling Centre Storm tank at sewage works Sewage works Stalham Company site name STALHAM STW EA ID / permit AWS01269 · AEENF/1312 Outlet location TG3576025110 (OS grid reference) · View on Apple Maps WFD catchment Ant (Dilham to R. Bure) (GB105034051330) 2024 spills / hours 34 / 341 Long-term average 18.7 spills a year (monitored since 2023) Monitor below 90% Power failure / issue · Resolved - Aug Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.2 hours spilling →	The River Ant & Trib	2	7.2	down 94%	86%
St Ives Water Recycling Centre Storm tank at sewage works Sewage works St Ives Company site name ST IVES STW EA ID / permit AWS01256 · AWCNF1203 Outlet location TL3185073440 (OS grid reference) · View on Apple Maps WFD catchment Marley Gap Brook (GB105033042800) 2024 spills / hours 38 / 337 Long-term average 23.3 spills a year (monitored since 2023) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.1 hours spilling →	Marley Gap Brook	3	7.1	down 92%	74%
Norwich Lower Close (Ferry Ln) CSO Overflow on sewer network Company site name Norwich Lower Close (Ferry Lane) Combined Sewer Overflow EA ID / permit AWS00939 · EPRGB3293WP Outlet location TG2391008730 (OS grid reference) · View on Apple Maps WFD catchment Wensum DS Norwich (GB105034055882) 2024 spills / hours 76 / 64 Long-term average 17.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.1 hours spilling →	The River Wensum	11	7.1	down 86%	100%
Cliff Quay New Tunnel Outfall Overflow on sewer network Company site name East Maintenance EA ID / permit AWS00244 · ASETS12156 Outlet location TM1695043040 (OS grid reference) · View on Apple Maps WFD catchment ORWELL (GB520503613601) 2024 spills / hours 56 / 36 Long-term average 33.1 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 7.0 hours spilling →	River Orwell	35	7.0	down 38%	100%
Leighton Buzzard - Chainbridge PS Storm discharge at pumping station Company site name LEIGHTON BUZD-CHAINBRIDGE SP EA ID / permit AWS00720 · AWCNF11872 Outlet location SP9248024770 (OS grid reference) · View on Apple Maps WFD catchment Clipstone Brook (GB105033037830) 2024 spills / hours 16 / 67 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 7.0 hours spilling →	River Ouzel	5	7.0	down 69%	100%
Boston Sleaford Road PS Storm discharge at pumping station Company site name Boston Sleaford Road Pumping Station EA ID / permit AWS00104 · ANNNF13727 Outlet location TF3141043900 (OS grid reference) · View on Apple Maps WFD catchment Black Sluice IDB draining to the South Forty Foot Drain (GB205030051515) Shellfish water West Wash 2024 spills / hours 19 / 14 Long-term average 17.4 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 6.9 hours spilling →	North Forty Foot Drain	9	6.9	down 53%	100%
Eye Water Recycling Centre Storm tank at sewage works Sewage works Eye Company site name EYE-HOXNE RD STW EA ID / permit AWS00423 · AW4NF64X Outlet location TM1575074640 (OS grid reference) · View on Apple Maps WFD catchment Dove (GB105034045710) 2024 spills / hours 39 / 272 Long-term average 21.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	River Dove	5	6.8	down 87%	100%
West Runton Water Lane Pumping St. Storm discharge at pumping station Company site name West Runton Water Lane Pumping Station EA ID / permit AWS01475 · AEECS12198 Outlet location TG1859043190 (OS grid reference) · View on Apple Maps WFD catchment Norfolk East (GB650503520003) Bathing water West Runton 2024 spills / hours 32 / 117 Long-term average 25.1 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	The North Sea	7	6.8	down 78%	100%
Fen Street PS Storm discharge at pumping station Company site name OLD BUCKENHAM-FEN STREET TPS EA ID / permit AWS00431 · AECNF11066 Outlet location TM0519091470 (OS grid reference) · View on Apple Maps WFD catchment Buckenham Stream (GB105033043411) 2024 spills / hours 50 / 641 Long-term average 25.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	Buckenham Stream	1	6.8	down 98%	100%
Irchester PS Storm discharge at pumping station Company site name IRCHESTER TPS EA ID / permit AWS00650 · AWNNF2403 Outlet location SP9290267196 (OS grid reference) · View on Apple Maps WFD catchment Knuston Brook (GB105032045060) 2024 spills / hours 1 / 0.8 Long-term average 1.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	Knuston Brook to R Nene	2	6.8	up 100%	100%
Southend-Prince Ave (Bell Pub) CSO Overflow on sewer network Company site name Bell Public House/Prince Avenue CSO EA ID / permit AWS01195 · AW2NFE17964 Outlet location TQ8723088530 (OS grid reference) · View on Apple Maps WFD catchment Prittle Brook (GB105037028730) 2024 spills / hours 13 / 16 Long-term average 12.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.5 hours spilling →	Trib of Prittle Brook	7	6.5	down 46%	100%
Sports Centre Mill Rd. Overflow on sewer network Company site name COLCHESTER-ROWHEDGE RD EA ID / permit AWS01216 · AW2NFC2916 Outlet location TM0060028888 (OS grid reference) · View on Apple Maps WFD catchment Salary Brook (GB105037041320) 2024 spills / hours 12 / 11 Long-term average 9.0 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 Volume & pollution Estimate from 6.3 hours spilling →	Tendring Streams	6	6.3	down 50%	99%
Thorrington Water Recycling Centre Storm tank at sewage works Sewage works Thorrington Company site name THORRINGTON STW EA ID / permit AWS01375 · AW2NFE02070 Outlet location TM0796020530 (OS grid reference) · View on Apple Maps WFD catchment Tenpenny Brook (GB105037041310) 2024 spills / hours 73 / 443 Long-term average 48.6 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 Volume & pollution Estimate from 6.3 hours spilling →	Tove (Ds Greens Norton)	3	6.3	down 96%	98%
Arrington Water Recycling Centre Storm tank at sewage works Sewage works Arrington Company site name Arrington Water Recycling Centre EA ID / permit AWS00022 · ASCNF176/10117 Outlet location TL3279049740 (OS grid reference) · View on Apple Maps WFD catchment Rhee (DS Wendy) (GB105033037610) 2024 spills / hours 20 / 67 Long-term average 18.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.3 hours spilling →	Trib River Cam	6	6.3	down 70%	90%
Beccles - Ingate SSO Overflow on sewer network Company site name BECCLES-INGATE SSO EA ID / permit AWS00067 · ASENF1674 Outlet location TM4263089930 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) 2024 spills / hours 15 / 8.3 Long-term average 14.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.3 hours spilling →	The River Waveney	10	6.3	down 33%	100%
Wellingborough - Henshaw Rd CSO Overflow on sewer network Company site name Wellingborough - Henshaw Road Combined Sewer Overflow EA ID / permit AWS01459 · AWNNF10520 Outlet location SP8832066970 (OS grid reference) · View on Apple Maps WFD catchment Swanspool Brook (GB105032045070) 2024 spills / hours 11 / 37 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 6.3 hours spilling →	Swanspool Brook	4	6.3	down 64%	93%
Lowestoft St John'S Road CSO Overflow on sewer network Company site name Lowestoft St John's Road CSO EA ID / permit AWS00788 · ASETS4082/16950 Outlet location TM5464092670 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) Bathing water Lowestoft (North of Claremont Pier) 2024 spills / hours 7 / 2.0 Long-term average 45.7 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 6.1 hours spilling →	Lake Lothing	7	6.1	no change	100%
Southtown/Cobham Outfall Storm discharge at pumping station Company site name GT YARMTH-STOWN SUFFOLK RD SP EA ID / permit AWS01201 · AEETS12171 Outlet location TG5243005900 (OS grid reference) · View on Apple Maps WFD catchment BURE & WAVENEY & YARE & LOTHING (GB510503410700) 2024 spills / hours 20 / 11 Long-term average 20.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.0 hours spilling →	Tidal River Yare	9	6.0	down 55%	100%
Pickenham Road TPS Storm discharge at pumping station Company site name NECTON-PICKENHAM ROAD TPS EA ID / permit AWS00992 · AECNF11705 Outlet location TF8767008660 (OS grid reference) · View on Apple Maps WFD catchment Wissey - Upper (GB105033047890) 2024 spills / hours 35 / 566 Long-term average 18.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.0 hours spilling →	River Wissey	1	6.0	down 97%	100%
Southminster - Burnham Road CSO Overflow on sewer network Company site name SOUTHMINSTER-BURNHAM RD OV EA ID / permit AWS01199 · ASENF10329 Outlet location TQ9583099350 (OS grid reference) · View on Apple Maps WFD catchment CROUCH (GB520503704100) 2024 spills / hours 9 / 5.5 Long-term average 14.4 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 Volume & pollution Estimate from 6.0 hours spilling →	Trib River Crouch	8	6.0	down 11%	100%

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.