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
Weston by Welland STW Storm tank at sewage works Sewage works Weston By Welland EA ID / permit AWS01479 · AW5NF5224 Outlet location SP7805091890 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 114 / 1,855 Long-term average 42.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 140 hours spilling →	Tributary River Welland Nt	15	140	down 87%	100%
Padbury STW Storm tank at sewage works Sewage works Padbury EA ID / permit AWS00966 · AWCNF11348 Outlet location SP7120030530 (OS grid reference) · View on Apple Maps WFD catchment Padbury Brook (The Twins) (GB105033038220) 2024 spills / hours 67 / 967 Long-term average 50.3 spills a year (monitored since 2022) Monitor below 90% Power failure / issue · Scheduled Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 139 hours spilling →	Padbury Brook	10	139	down 85%	86%
Weedon STW Storm tank at sewage works Sewage works Weedon EA ID / permit AWS01453 · AWNNF13136 Outlet location SP6387059010 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Whilton Branch to conf Brampton Branch (GB105032045320) 2024 spills / hours 67 / 797 Long-term average 35.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 139 hours spilling →	Trib Kislingbury Branch R Nene	15	139	down 78%	100%
Waresley Water Recycling Centre Storm tank at sewage works Sewage works Waresley Company site name WARESLEY STW EA ID / permit AWS01438 · AW1NF2543 Outlet location TL2592055000 (OS grid reference) · View on Apple Maps WFD catchment Abbotsley and Hen Brooks (GB105033043240) 2024 spills / hours 50 / 935 Long-term average 35.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 139 hours spilling →	Abbotsley Brook Nt	12	139	down 76%	100%
Whittlebury Sewage Pumping Station Storm discharge at pumping station Company site name WHITTLEBURY SP EA ID / permit AWS01491 · AW1NF159 Outlet location SP6819544348 (OS grid reference) · View on Apple Maps WFD catchment Silverstone Brook (GB105033038250) 2024 spills / hours 38 / 367 Long-term average 32.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 138 hours spilling →	Trib of Silverstone Brook	18	138	down 53%	100%
Spilsby STW Storm tank at sewage works Sewage works Spilsby EA ID / permit AWS01210 · AW3NF125 Outlet location TF4220064600 (OS grid reference) · View on Apple Maps WFD catchment Lymn / Steeping (GB105030062430) 2024 spills / hours 48 / 470 Long-term average 27.8 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 137 hours spilling →	River Lymn	16	137	down 67%	100%
Peterborough - Flag Fen WRC Inlet overflow at sewage works Sewage works Peterborough Flag Fen Company site name PETERBOROUGH (FLAG FEN) STW EA ID / permit AWS00983 · AW5NF5178 Outlet location TL2214098130 (OS grid reference) · View on Apple Maps WFD catchment North Level Pumped Areas 2 and 3 (GB205032050385) 2024 spills / hours 127 / 2,081 Long-term average 78.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 137 hours spilling →	Counterdrain River Nene T	30	137	down 76%	100%
Drinkstone PS Storm discharge at pumping station Company site name DRINKSTONE-WOOLPIT RD SP EA ID / permit AWS00355 · ASCNF2788 Outlet location TL9611060620 (OS grid reference) · View on Apple Maps WFD catchment Sapiston (GB105033043280) 2024 spills / hours 55 / 749 Long-term average 34.3 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 137 hours spilling →	Trib River Sapiston	20	137	down 64%	100%
Mablethorpe Water Recycling Centre Storm tank at sewage works Sewage works Mablethorpe Company site name MABLETHORPE STW EA ID / permit AWS00796 · ANNNF13149 Outlet location TF4912082440 (OS grid reference) · View on Apple Maps WFD catchment Woldgrift Drain (GB105029061750) 2024 spills / hours 33 / 495 Long-term average 27.0 spills a year (monitored since 2020) 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 Volume & pollution Estimate from 135 hours spilling →	The Wold Grift Drain	12	135	down 64%	29%
Barrow Water Recycling Centre Storm tank at sewage works Sewage works Barrow Company site name Barrow Sewage Treatment Works EA ID / permit AWS00057 · ASCNF10281 Outlet location TL7803063740 (OS grid reference) · View on Apple Maps WFD catchment Cavenham Stream (GB105033043000) 2024 spills / hours 54 / 996 Long-term average 31.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 135 hours spilling →	Cavenham Stream River Lark Nt	13	135	down 76%	100%
Littleport WRC Storm tank at sewage works Sewage works Littleport Company site name LITTLEPORT STW EA ID / permit AWS00757 · AECNF10518 Outlet location TL5580088120 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 49 / 550 Long-term average 32.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 134 hours spilling →	Mare Fen Drain	15	134	down 69%	100%
Raunds STW Storm tank at sewage works Sewage works Raunds EA ID / permit AWS01032 · AW5NF5184 Outlet location SP9793072475 (OS grid reference) · View on Apple Maps WFD catchment Hog Dyke (GB105032045120) 2024 spills / hours 92 / 1,006 Long-term average 52.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 133 hours spilling →	The Hog Dyke	18	133	down 80%	100%
Avon Rd SSO Chelmsford Overflow on sewer network Company site name CHELMSFORD-AVON ROAD SSO EA ID / permit AWS00037 · ASENF10510 Outlet location TL6827008110 (OS grid reference) · View on Apple Maps WFD catchment Chignall Brook (GB105037033650) 2024 spills / hours 80 / 340 Long-term average 46.0 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 132 hours spilling →	tributary River Can	12	132	down 85%	99%
Station Rd PS Haddenham Storm discharge at pumping station Company site name HADDENHAM-STATION ROAD SP EA ID / permit AWS01283 · AECNF11044 Outlet location TL4676076320 (OS grid reference) · View on Apple Maps WFD catchment Old West River (GB205033043375) 2024 spills / hours 2 / 0.8 Long-term average 12.5 spills a year (monitored since 2024) Monitor below 90% Comms failure / issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 132 hours spilling →	trib Grunty Fen Drain	23	132	up 1050%	41%
Erpingham (Calthorpe Bridge) SPS Storm discharge at pumping station Company site name Erpingham - Calthorpe Bridge Terminal Pumping Station EA ID / permit AWS00413 · AW4NF1913 Outlet location TG1876031740 (OS grid reference) · View on Apple Maps WFD catchment Scarrow Beck (GB105034055740) 2024 spills / hours 36 / 305 Long-term average 33.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 131 hours spilling →	Scarrow Beck	17	131	down 53%	100%
Willen Road PS Storm discharge at pumping station Company site name NEWPORT PAGNELL-WILLEN RD TPS EA ID / permit AWS01503 · AW1NF3235 Outlet location SP8809043200 (OS grid reference) · View on Apple Maps WFD catchment Ouzel DS Caldecote Mill (GB105033037972) 2024 spills / hours 46 / 741 Long-term average 10.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 129 hours spilling →	River Ouzel	13	129	down 72%	100%
Ingatestone Water Recycling Centre Storm tank at sewage works Sewage works Ingatestone Company site name INGATESTONE STW EA ID / permit AWS00637 · AW2NF152 Outlet location TQ6642099070 (OS grid reference) · View on Apple Maps WFD catchment Wid (Ingatestone Hall - Margaretting Hall) (GB105037028690) 2024 spills / hours 68 / 769 Long-term average 53.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 129 hours spilling →	River Wid Nt	20	129	down 71%	100%
Wickham Market WRC Storm tank at sewage works Sewage works Wickham Market Company site name WICKHAM MARKET STW EA ID / permit AWS01498 · ASENF10537 Outlet location TM3094055960 (OS grid reference) · View on Apple Maps WFD catchment Deben (Brandeston Bridge - Melton) (GB105035046310) 2024 spills / hours 34 / 533 Long-term average 32.5 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 129 hours spilling →	River Deben	13	129	down 62%	100%
Downham Market STW Storm tank at sewage works Sewage works Downham Market EA ID / permit AWS00348 · AECNF1059 Outlet location TF6049004280 (OS grid reference) · View on Apple Maps WFD catchment Relief Channel (GB205033047665) 2024 spills / hours 66 / 1,228 Long-term average 44.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 128 hours spilling →	Trib Flood Relief Channel	13	128	down 80%	100%
Dartford Road CSO Overflow on sewer network Company site name Dartford Road Combined Sewer Overflow EA ID / permit AWS00316 · AECNF11502 Outlet location TL4111096870 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 19 / 103 Long-term average 18.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 128 hours spilling →	The River Nene (Old Course)	16	128	down 16%	97%
Bocking Water Recycling Centre Storm tank at sewage works Sewage works Bocking Company site name BOCKING STW EA ID / permit AWS00095 · AW2NFE09666 Outlet location TL7736024280 (OS grid reference) · View on Apple Maps WFD catchment Blackwater (Combined Essex) (GB105037041160) 2024 spills / hours 34 / 542 Long-term average 16.7 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 128 hours spilling →	River Blackwater Nt	8	128	down 76%	100%
Tilton on the Hill STW Storm tank at sewage works Sewage works Tilton On The Hill EA ID / permit AWS01385 · AW5NF5249 Outlet location SK7467005020 (OS grid reference) · View on Apple Maps WFD catchment Eye Brook (GB105031050550) 2024 spills / hours 98 / 1,284 Long-term average 44.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 126 hours spilling →	Tributary of Eye Brook	29	126	down 70%	100%
Great Gonerby PS Storm discharge at pumping station Company site name GT GONERBY-BELTON LANE SP EA ID / permit AWS00499 · ANNNF10540 Outlet location SK9051038420 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Cringle Bk to conf Brant (GB105030056780) 2024 spills / hours 50 / 359 Long-term average 38.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 125 hours spilling →	Running Furrows Drain River Wi	27	125	down 46%	100%
Silverstone Playing Ground Combined Sewage Overflow - Anw1565 Overflow on sewer network Company site name SILVERSTONE PLAYING FIELD SSO1_NEW EA ID / permit AWS00903 · EPR/YB3896VF Outlet location SP6650744599 (OS grid reference) · View on Apple Maps WFD catchment Silverstone Brook (GB105033038250) 2024 spills / hours 35 / 177 Long-term average 24.0 spills a year (monitored since 2024) Monitor below 90% Sensor failure / issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 124 hours spilling →	Silverstone Brook	24	124	down 31%	45%
Sawtry Water Recycling Centre Storm tank at sewage works Sewage works Sawtry Company site name SAWTRY STW EA ID / permit AWS01099 · AWCNF1187 Outlet location TL1799082650 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 67 / 1,201 Long-term average 47.3 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 124 hours spilling →	Trib of Middle Level Catch Drn	14	124	down 79%	100%
Over Water Recycling Centre Storm tank at sewage works Sewage works Over Company site name OVER STW EA ID / permit AWS00964 · ASCNF1162 Outlet location TL3864070930 (OS grid reference) · View on Apple Maps WFD catchment Old West River (GB205033043375) 2024 spills / hours 101 / 1,974 Long-term average 60.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 124 hours spilling →	Dockerell Brook River Great Ou	11	124	down 89%	100%
Wyton (Ex-Raf) Water Recycling Cntr Storm tank at sewage works Sewage works Wyton Water Recycling Cntr Company site name Wyton (Ex-RAF) Water Recycling Centre EA ID / permit AWS01548 · AWCNF11516 Outlet location TL2769073300 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Roxton to Earith) (GB105033047921) 2024 spills / hours 55 / 591 Long-term average 49.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 122 hours spilling →	River Great Ouse & Tributary	18	122	down 67%	100%
Forncett End STW Storm tank at sewage works Sewage works Forncett End Company site name FORNCETT-FORNCETT END STW EA ID / permit AWS00446 · AEENF12062 Outlet location TM1439092690 (OS grid reference) · View on Apple Maps WFD catchment Tas (Head to Tasburgh) (GB105034045730) 2024 spills / hours 51 / 790 Long-term average 44.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 122 hours spilling →	tributary River Tas	17	122	down 67%	100%
Long Stratton WRC Storm tank at sewage works Sewage works Long Stratton Company site name LONG STRATTON STW EA ID / permit AWS00769 · AEENF1406 Outlet location TM1927093530 (OS grid reference) · View on Apple Maps WFD catchment Tas (Head to Tasburgh) (GB105034045730) 2024 spills / hours 30 / 308 Long-term average 24.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 121 hours spilling →	Tributary River Tas Nt	12	121	down 60%	100%
Islip Water Recycling Centre Storm tank at sewage works Sewage works Islip Company site name ISLIP STW EA ID / permit AWS00659 · AW5NF557A Outlet location SP9938079580 (OS grid reference) · View on Apple Maps WFD catchment Nene - Islip to tidal (GB105032050381) 2024 spills / hours 61 / 941 Long-term average 37.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 119 hours spilling →	The River Nene	12	119	down 80%	97%
Great Bromley WRC Storm tank at sewage works Sewage works Great Bromley Company site name Great Bromley Water Recycling Centre EA ID / permit AWS00486 · ASENF10358 Outlet location TM0836025940 (OS grid reference) · View on Apple Maps WFD catchment Tenpenny Brook (GB105037041310) 2024 spills / hours 53 / 983 Long-term average 17.0 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 Volume & pollution Estimate from 119 hours spilling →	Bromley Brook	14	119	down 74%	100%
Howsham - Cadney Road TPS Storm discharge at pumping station Company site name CSO and EO at Howsham-Cadney Road TPS EA ID / permit AWS00622 · ANNNF2180 Outlet location TA0425004040 (OS grid reference) · View on Apple Maps WFD catchment Kettleby Beck (GB104029067510) 2024 spills / hours 23 / 152 Long-term average 18.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 119 hours spilling →	Froghall Drain - Kettleby Beck	14	119	down 39%	100%
Newton Longville-Whaddon Road PS Storm discharge at pumping station Company site name NEWTON LONGVILLE-WHADDON RD SP EA ID / permit AWS00880 · AW1NF1310 Outlet location SP8428032020 (OS grid reference) · View on Apple Maps WFD catchment Newton Longville Brook (GB105033037840) 2024 spills / hours 56 / 446 Long-term average 43.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 119 hours spilling →	Trib Newton Longville Brook	21	119	down 63%	100%
Rignals La CSO Overflow on sewer network Company site name GALLEYWOOD RIGNALS LN OV EA ID / permit AWS01050 · ASENF12079 Outlet location TL7179003190 (OS grid reference) · View on Apple Maps WFD catchment Sandon Brook (West arm) (GB105037028630) 2024 spills / hours 18 / 99 Long-term average 13.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 119 hours spilling →	tributary Sandon Brook	9	119	down 50%	100%
Church St TPS Storm discharge at pumping station Company site name LONG BENNINGTON-CHURCH ST TPS EA ID / permit AWS00232 · ANNNF13147 Outlet location SK8417044190 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Cringle Bk to conf Brant (GB105030056780) 2024 spills / hours 42 / 420 Long-term average 28.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 119 hours spilling →	Ease Drain	14	119	down 67%	100%
Little Downham Water Recycling Cntr Storm tank at sewage works Sewage works Little Downham Water Recycling Cntr Company site name LITTLE DOWNHAM STW EA ID / permit AWS00749 · AECNF10119 Outlet location TL5337084070 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 53 / 326 Long-term average 36.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 117 hours spilling →	Pipers Hill Drain River Great	29	117	down 45%	100%
Steeple Bumpstead STW Inlet overflow at sewage works Sewage works Steeple Bumpstead Company site name Steeple Bumpstead Sewage Treatment Works EA ID / permit AWS01291 · ASENF1543 Outlet location TL6839041630 (OS grid reference) · View on Apple Maps WFD catchment Bumpstead Brook (GB105036040910) 2024 spills / hours 69 / 787 Long-term average 36.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 117 hours spilling →	Bumpstead Brook River Stour N	20	117	down 71%	99%
Monks Way CSO Overflow on sewer network Company site name WELLINGBOROUGH-MONKS WAY SSO EA ID / permit AWS00853 · NPSWQD006883 Outlet location SP8907267534 (OS grid reference) · View on Apple Maps WFD catchment Swanspool Brook (GB105032045070) 2024 spills / hours 135 / 1,155 Long-term average 73.5 spills a year (monitored since 2024) Monitor below 90% Power failure / issue · Resolved - Jan Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 117 hours spilling →	Swanspool Brook	12	117	down 91%	89%
Kings Lynn Austin Fields PS Storm discharge at pumping station EA ID / permit AWS01581 · AECTS189/10313/V001 Outlet location TF6148020470 (OS grid reference) · View on Apple Maps WFD catchment GREAT OUSE (GB530503300300) 2024 spills / hours – / – Long-term average 39.0 spills a year (monitored since 2025) 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 115 hours spilling →	The Great River Ouse (Tidal)	39	115		100%
Welfen Lane Terminal Pumping Statio Storm discharge at pumping station Company site name CLAYPOLE-WELFEN LA TPS EA ID / permit AWS01455 · ANNNF13391 Outlet location SK8453049390 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Cringle Bk to conf Brant (GB105030056780) 2024 spills / hours 49 / 395 Long-term average 31.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 115 hours spilling →	Claypole Drain South	20	115	down 59%	100%
Aldeburgh STW Inlet overflow at sewage works Sewage works Aldeburgh EA ID / permit AWS00012 · AW4CS12011 Outlet location TM4735054700 (OS grid reference) · View on Apple Maps WFD catchment Suffolk (GB650503520002) 2024 spills / hours 90 / 172 Long-term average 78.3 spills a year (monitored since 2022) High-spill reason (company) Performance - Pump failure / issue Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed, Bathing Water and/or Shellfish Water investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 114 hours spilling →	North Sea	66	114	down 27%	100%
Gedding WRC Storm tank at sewage works Sewage works Gedding Company site name GEDDING STW EA ID / permit AWS00462 · ASENF12211 Outlet location TL9482057650 (OS grid reference) · View on Apple Maps WFD catchment Rattlesden River (u/s confluence with Gt. Finborough) (GB105035046150) 2024 spills / hours 49 / 1,023 Long-term average 29.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 113 hours spilling →	Tribtary of Rattlesden River	8	113	down 84%	100%
Louth-Churchlights CSO Overflow on sewer network Company site name Louth-Church Lights Combined Sewer Overflow EA ID / permit AWS00775 · ANNNF13590 Outlet location TF3259087500 (OS grid reference) · View on Apple Maps WFD catchment Louth Canal (GB104029061990) 2024 spills / hours 32 / 254 Long-term average 42.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 113 hours spilling →	River Lud	25	113	down 22%	100%
Earls Colne Water Recycling Centre Storm tank at sewage works Sewage works Earls Colne Company site name EARLS COLNE STW EA ID / permit AWS00372 · AW2NFE11569 Outlet location TL8644029220 (OS grid reference) · View on Apple Maps WFD catchment Colne (d/s Doe's Corner) (GB105037041330) 2024 spills / hours 38 / 648 Long-term average 28.3 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 111 hours spilling →	River Colne Nt	10	111	down 74%	99%
Odell Water Recycling Centre Storm tank at sewage works Sewage works Odell Company site name ODELL STW EA ID / permit AWS00950 · AW1NF1081 Outlet location SP9835057930 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) 2024 spills / hours 165 / 2,997 Long-term average 99.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 111 hours spilling →	The Great River Ouse	10	111	down 94%	100%
Little Bytham STW Storm tank at sewage works Sewage works Little Bytham EA ID / permit AWS00746 · AWNNF3227/13357 Outlet location TF0073018060 (OS grid reference) · View on Apple Maps WFD catchment The Tham (GB105031050650) 2024 spills / hours 137 / 1,972 Long-term average 91.7 spills a year (monitored since 2023) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	tributary West Glen River	48	110	down 65%	100%
West Barkwith - Main Road Sp Storm discharge at pumping station Company site name CSO and EO at West Barkwith-Main Road SP EA ID / permit AWS01468 · ANNNF2743 Outlet location TF1587080420 (OS grid reference) · View on Apple Maps WFD catchment Stainfield Beck - West Arm (GB105030062310) 2024 spills / hours 48 / 432 Long-term average 37.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	Trib of Torrington Beck	27	110	down 44%	100%
Navenby Water Recycling Centre Storm tank at sewage works Sewage works Navenby Company site name NAVENBY STW EA ID / permit AWS00864 · ANNNF2081 Outlet location SK9811057740 (OS grid reference) · View on Apple Maps WFD catchment Brant - Lower (GB105030056770) 2024 spills / hours 39 / 379 Long-term average 20.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	Trib Navenby Beck	9	110	down 77%	99%
Weston Underwood STW Storm tank at sewage works Sewage works Weston Underwood Company site name Weston Underwood WRC EA ID / permit AWS01481 · AWCNF11026 Outlet location SP8680050310 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) 2024 spills / hours 80 / 1,155 Long-term average 50.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 110 hours spilling →	Trib River Gt Ouse	21	110	down 74%	100%
Great Hale Pumping Stn Storm discharge at pumping station Company site name GT HALE SP EA ID / permit AWS00501 · AW3NF482 Outlet location TF1474042710 (OS grid reference) · View on Apple Maps WFD catchment Black Sluice IDB draining to the South Forty Foot Drain (GB205030051515) 2024 spills / hours 22 / 103 Long-term average 18.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 109 hours spilling →	The Beck	15	109	down 32%	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.