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
Holbeach Water Recycling Centre Storm tank at sewage works Sewage works Holbeach Company site name Holbeach WRC EA ID / permit AWS00603 · AW5NF378A Outlet location TF3575026030 (OS grid reference) · View on Apple Maps WFD catchment Whaplode River (GB205031055495) 2024 spills / hours 53 / 801 Long-term average 40.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 54 hours spilling →	Holbeach River	8	54	down 85%	100%
Sisland (Loddon) STW Storm tank at sewage works Sewage works Sisland Company site name SISLAND STW EA ID / permit AWS01137 · AW4NF1064X Outlet location TM3431099440 (OS grid reference) · View on Apple Maps WFD catchment Chet (GB105034051190) 2024 spills / hours 5 / 83 Long-term average 6.0 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 53 hours spilling →	River Chet	5	53	no change	100%
Stanion STW Storm tank at sewage works Sewage works Stanion EA ID / permit AWS01276 · AWNNF13653 Outlet location SP9225086820 (OS grid reference) · View on Apple Maps WFD catchment Harpers Brook (GB105032045230) 2024 spills / hours 28 / 123 Long-term average 29.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 53 hours spilling →	Harpers Brook	20	53	down 29%	100%
Winterton - Park St 1 CSO Overflow on sewer network Company site name Winterton - Park Street 1 Combined Sewer Overflow EA ID / permit AWS01515 · AW3NFF498 Outlet location SE9343018310 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 22 / 277 Long-term average 34.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 53 hours spilling →	Trib of Winterton Holmes Dr	15	53	down 32%	100%
CSO'S in Leiston Overflow on sewer network Company site name LEISTON-HAYLINGS ROAD EA ID / permit AWS00312 · ASENF16165 Outlet location TM4523063300 (OS grid reference) · View on Apple Maps WFD catchment Leiston Beck (GB105035046271) 2024 spills / hours 105 / 107 Long-term average 71.3 spills a year (monitored since 2023) High-spill reason (company) Not asset maintenance - Hydraulic capacity 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 53 hours spilling →	Leiston Beck	42	53	down 60%	94%
Laxfield WRC Pumping Station Storm discharge at pumping station Company site name Laxfield WRC Pumping Station EA ID / permit AWS00716 · ASENF12095 Outlet location TM2997071960 (OS grid reference) · View on Apple Maps WFD catchment Blyth (Laxfield - Hevingham Hall) (GB105035046000) 2024 spills / hours 24 / 106 Long-term average 16.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 53 hours spilling →	River Blyth	8	53	down 67%	100%
Rush Bottom Lane & Stansfield Rd Overflow on sewer network Company site name THUNDERSLEY-JNC. RUSHBOTTOM LN/STANSFIELD RD CSO EA ID / permit AWS01076 · AW2NFE27266 Outlet location TQ7660089400 (OS grid reference) · View on Apple Maps WFD catchment CROUCH (GB520503704100) 2024 spills / hours 16 / 133 Long-term average 12.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 52 hours spilling →	Trib of River Crouch	8	52	down 50%	98%
Trowse Terminal Pumping Station Storm discharge at pumping station Company site name Trowse Terminal Pumping Station EA ID / permit AWS01404 · EPRHB3693AF Outlet location TG2450007100 (OS grid reference) · View on Apple Maps WFD catchment Yare (Tiffey to Wensum) (GB105034051281) 2024 spills / hours 43 / 428 Long-term average 25.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 52 hours spilling →	The River Yare	15	52	down 65%	100%
Whittlesey STW Storm tank at sewage works Sewage works Whittlesey EA ID / permit AWS01492 · AW5NF810 Outlet location TL2745096220 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 45 / 763 Long-term average 27.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 52 hours spilling →	The Whittlesey Dyke	3	52	down 93%	98%
Steeple Bumpstead PS-Nos.1,2,3 & 4 Storm discharge at pumping station Company site name STEEPLE BUMPSTEAD-LILLEY TPS EA ID / permit AWS01289 · AW2NFE15068 Outlet location TL6759140950 (OS grid reference) · View on Apple Maps WFD catchment Bumpstead Brook (GB105036040910) 2024 spills / hours 21 / 255 Long-term average 11.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 51 hours spilling →	Bumpstead Brook	5	51	down 76%	100%
Bacton (Suffolk) WRC Storm tank at sewage works Sewage works Bacton Company site name Bacton Water Recycling Centre EA ID / permit AWS00040 · ASENF1006 Outlet location TM0547067520 (OS grid reference) · View on Apple Maps WFD catchment Dove trib - Finningham (GB105034045660) 2024 spills / hours 31 / 572 Long-term average 14.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 51 hours spilling →	Trib of the River Blackwtaer	4	51	down 87%	100%
Ramsey - Bodsey TPS Storm discharge at pumping station Company site name Ramsey - Bodsey Terminal Pumping Station EA ID / permit AWS01024 · AWCNF2779 Outlet location TL2950087500 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 8 / 78 Long-term average 4.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 51 hours spilling →	High Lode	6	51	down 25%	100%
Bungay Water Recycling Centre Inlet overflow at sewage works Sewage works Bungay Company site name BUNGAY STW EA ID / permit AWS00177 · ASENF242 Outlet location TM3438089270 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Starston Brook - Ellingham Mill) (GB105034045902) 2024 spills / hours 13 / 85 Long-term average 15.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 51 hours spilling →	Tin River, Trib R. Waveney Nt	18	51	up 38%	98%
Norwich - Ketts Hill CSO Overflow on sewer network Company site name NORWICH - KETTS HILL EA ID / permit AWS00927 · EPRNB3591AF Outlet location TG2398009200 (OS grid reference) · View on Apple Maps WFD catchment Wensum DS Norwich (GB105034055882) 2024 spills / hours 61 / 95 Long-term average 29.8 spills a year (monitored since 2020) 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 51 hours spilling →	River Wensum	35	51	down 43%	95%
Bedford Water Recycling Centre Storm tank at sewage works Sewage works Bedford Company site name BEDFORD STW EA ID / permit AWS00073 · AW1NF2460 Outlet location TL0804049690 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) 2024 spills / hours 92 / 1,292 Long-term average 46.2 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 50 hours spilling →	The River Great Ouse	7	50	down 92%	62%
Barnham Broome - Mill Road CSO Overflow on sewer network Company site name Barnham Broome - Mill Road EA ID / permit AWS00053 · AEENF2470 Outlet location TG0752007550 (OS grid reference) · View on Apple Maps WFD catchment Yare (u/s confluence with Tiffey - Lower) (GB105034051290) 2024 spills / hours 33 / 627 Long-term average 28.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 50 hours spilling →	River Yare	6	50	down 82%	100%
Doddington STW Storm tank at sewage works Sewage works Doddington EA ID / permit AWS00344 · AWCNF11342 Outlet location TL4006091850 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 47 / 824 Long-term average 33.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 50 hours spilling →	tributary Ransonmoor Drain	7	50	down 85%	100%
Coddenham - Blacksmiths Lane TPS Storm discharge at pumping station Company site name CODDENHAM-BLACKSMITHS LA TPS EA ID / permit AWS00250 · ASENF2147 Outlet location TM1317054430 (OS grid reference) · View on Apple Maps WFD catchment Coddenham Watercourse (GB105035046100) 2024 spills / hours 24 / 159 Long-term average 11.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 50 hours spilling →	Tributary of the River Gipping	8	50	down 67%	100%
Beccles - Common Lane Terminal PS Storm discharge at pumping station Company site name Beccles - Common Lane Terminal Pumping Station EA ID / permit AWS00066 · ASETS16674 Outlet location TM4236091100 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) 2024 spills / hours 25 / 62 Long-term average 21.6 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 50 hours spilling →	Tributary of the River Waveney	17	50	down 32%	100%
Newton Marsh Water Recycling Centre Storm tank at sewage works Sewage works Newton Marsh Company site name TETNEY-NEWTON MARSH STW EA ID / permit AWS00881 · ANNTS13007 Outlet location TA3543003200 (OS grid reference) · View on Apple Maps WFD catchment HUMBER LOWER (GB530402609201) 2024 spills / hours 34 / 66 Long-term average 35.4 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 49 hours spilling →	Tetney Haven	10	49	down 71%	100%
Great Brickhill STW Storm tank at sewage works Sewage works Great Brickhill EA ID / permit AWS00484 · AWCNF10411 Outlet location SP9067029870 (OS grid reference) · View on Apple Maps WFD catchment Ouzel US Caldecote Mill (GB105033037971) 2024 spills / hours 35 / 286 Long-term average 21.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 49 hours spilling →	Brickhill Brook River Ouzel Nt	16	49	down 54%	100%
Ardley Water Recycling Centre Storm tank at sewage works Sewage works Ardley Company site name ARDLEY STW EA ID / permit AWS00021 · AWCNF3004/11073 Outlet location SP5439028080 (OS grid reference) · View on Apple Maps WFD catchment Padbury Brook (GB105033038210) 2024 spills / hours 31 / 573 Long-term average 12.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 49 hours spilling →	Stoke Lyne Brook	9	49	down 71%	100%
Ashley SPS Storm discharge at pumping station Company site name ASHLEY TPS EA ID / permit AWS00026 · AW5NF1789 Outlet location SP8000090900 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 23 / 118 Long-term average 18.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 49 hours spilling →	Trib River Welland	14	49	down 39%	99%
CSO'S in Leiston Overflow on sewer network Company site name LEISTON-CROSS ST/HAYLINGS ROAD EA ID / permit AWS00311 · ASENF16165 Outlet location TM4523063300 (OS grid reference) · View on Apple Maps WFD catchment Leiston Beck (GB105035046271) 2024 spills / hours 44 / 37 Long-term average 37.7 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 48 hours spilling →	Leiston Beck	26	48	down 41%	94%
Weedon Pumping Station Storm discharge at pumping station Company site name WEEDON TPS EA ID / permit AWS01450 · AW5NF65 Outlet location SP6260059400 (OS grid reference) · View on Apple Maps WFD catchment Nene - headwaters to conf Whilton Branch (GB105032045310) 2024 spills / hours 33 / 367 Long-term average 16.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	River Nene	5	48	down 85%	100%
Canvey - New Road Sp Storm discharge at pumping station Company site name CANVEY-NEW RD SP EA ID / permit AWS00196 · ASETS2493 Outlet location TQ7795083770 (OS grid reference) · View on Apple Maps WFD catchment THAMES LOWER (GB530603911401) 2024 spills / hours 1 / 3.3 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 Volume & pollution Estimate from 48 hours spilling →	The Drain-Ditch to Tidal Water	3	48	up 200%	98%
Caistor Road SWS Overflow on sewer network Company site name Market Rasen-Caistor Road Combined Sewer Overflow EA ID / permit AWS00188 · ANNNF13383 Outlet location TF1063089370 (OS grid reference) · View on Apple Maps WFD catchment Rase from Market Rasen to Bishopbridge (GB104029061870) 2024 spills / hours 21 / 78 Long-term average 19.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	River Rase	12	48	down 43%	100%
Little Oakley SPS Storm discharge at pumping station Company site name LT OAKLEY-SP EA ID / permit AWS00752 · AW2NF577 Outlet location TM2233028180 (OS grid reference) · View on Apple Maps WFD catchment Hamford Water (GB680503713700) 2024 spills / hours 41 / 436 Long-term average 33.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	Foulton Hall Ditch	18	48	down 56%	100%
Beccles Water Recycling Centre Storm tank at sewage works Sewage works Beccles Company site name BECCLES-MARSH LANE STW EA ID / permit AWS00068 · AW4NF556X Outlet location TM4485090730 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Ellingham Mill - Burgh St. Peter) (GB105034045903) 2024 spills / hours 38 / 132 Long-term average 26.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 48 hours spilling →	River Waveney T	13	48	down 66%	100%
Feltwell Water Recycling Centre Storm tank at sewage works Sewage works Feltwell Company site name FELTWELL STW EA ID / permit AWS00429 · AW1NF213 Outlet location TL7003090760 (OS grid reference) · View on Apple Maps WFD catchment Cut-off Channel (GB205033000040) 2024 spills / hours 192 / 4,145 Long-term average 69.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 47 hours spilling →	Cut-Off Channel	12	47	down 94%	100%
Wicken Bonhunt PS Storm discharge at pumping station Company site name WICKEN BONHUNT-SP EA ID / permit AWS01494 · ASCNF3556/11524 Outlet location TL5026033420 (OS grid reference) · View on Apple Maps WFD catchment Wicken Water (GB105033037540) 2024 spills / hours 21 / 158 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 47 hours spilling →	Wicken Water	8	47	down 62%	100%
Boxford Water Recycling Centre Storm tank at sewage works Sewage works Boxford Company site name BOXFORD STW EA ID / permit AWS00109 · ASENF1023 Outlet location TL9665039670 (OS grid reference) · View on Apple Maps WFD catchment Box (GB105036040920) 2024 spills / hours 25 / 318 Long-term average 13.4 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 47 hours spilling →	The River Box	3	47	down 88%	100%
Ditchingham Dam (Bungay) SPS Storm discharge at pumping station Company site name BUNGAY-DITCHINGHAM DAM SP EA ID / permit AWS00340 · AW4NF1775 Outlet location TM3381089910 (OS grid reference) · View on Apple Maps WFD catchment Waveney (Starston Brook - Ellingham Mill) (GB105034045902) 2024 spills / hours 28 / 40 Long-term average 31.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 46 hours spilling →	River Waveney	18	46	down 36%	100%
Copford Water Recycling Ccentre Storm tank at sewage works Sewage works Copford Water Recycling Ccentre Company site name COPFORD STW EA ID / permit AWS00276 · ASENF1050 Outlet location TL9330023500 (OS grid reference) · View on Apple Maps WFD catchment Roman River (GB105037034150) 2024 spills / hours 18 / 73 Long-term average 15.7 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 46 hours spilling →	The Roman River	10	46	down 44%	100%
North Street SSO Overflow on sewer network Company site name WINTERTON-NORTH STREET SSO EA ID / permit AWS00899 · ANNNF13487 Outlet location SE9361018950 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 10 / 41 Long-term average 10.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	Tributary of the West Drain	11	46	up 10%	100%
Great Oakley Sparrows Corner Cps Storm discharge at pumping station Company site name Gt Oakley Sparrows Corner Pumping Station EA ID / permit AWS00504 · AW2NFE02784 Outlet location TM2016028250 (OS grid reference) · View on Apple Maps WFD catchment Ramsey River (GB105036040830) 2024 spills / hours 24 / 291 Long-term average 27.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 46 hours spilling →	Trib River Ramsey	9	46	down 63%	100%
Lawshall - Harrow Triangle Sp Storm discharge at pumping station Company site name LAWSHALL-HARROWS TRIANGLE SP EA ID / permit AWS00715 · ASENF2681 Outlet location TL8560055100 (OS grid reference) · View on Apple Maps WFD catchment Lark (US Hawstead) (GB105033042920) 2024 spills / hours 15 / 192 Long-term average 11.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 45 hours spilling →	Trib River Lark	6	45	down 60%	100%
Normans Corner Pumping Station Storm discharge at pumping station Company site name BRIGSLEY-NORMANS CNR SP EA ID / permit AWS00889 · ANNNF13448 Outlet location TA2558002920 (OS grid reference) · View on Apple Maps WFD catchment Buck Beck from Source to N Sea (GB104029062110) 2024 spills / hours 5 / 40 Long-term average 5.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 45 hours spilling →	An Unamed Drain	5	45	no change	100%
Brixworth Water Recycling Centre Storm tank at sewage works Sewage works Brixworth Company site name BRIXWORTH STW EA ID / permit AWS00152 · AWNNF3764/13599 Outlet location SP7379071291 (OS grid reference) · View on Apple Maps WFD catchment Brampton Branch - Upper (GB105032045540) 2024 spills / hours 25 / 167 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 45 hours spilling →	Brampton Branch of River Nene	8	45	down 68%	99%
Nipsells Chase PS Storm discharge at pumping station Company site name MAYLANDSEA-NIPSELLS CH TPS EA ID / permit AWS00884 · AW2NFE03378 Outlet location TL9142002130 (OS grid reference) · View on Apple Maps WFD catchment BLACKWATER (GB520503714000) 2024 spills / hours 24 / 160 Long-term average 18.7 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 45 hours spilling →	Trib Mayland Brook	6	45	down 75%	100%
Leiston - Valley Road/Crown Street Overflow on sewer network Company site name Leiston - Valley Road/Crown Street #2 CSO EA ID / permit AWS00727 · EPRNB3695RN Outlet location TM4523063300 (OS grid reference) · View on Apple Maps WFD catchment Leiston Beck (GB105035046271) 2024 spills / hours 46 / 65 Long-term average 51.0 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 45 hours spilling →	Leiston Beck	35	45	down 24%	85%
Sports Centre Mill Rd. Overflow on sewer network Company site name COLCHESTER-GREENSTEAD RD OV EA ID / permit AWS01213 · AW2NFC2912 Outlet location TM0060028888 (OS grid reference) · View on Apple Maps WFD catchment Salary Brook (GB105037041320) 2024 spills / hours 103 / 139 Long-term average 75.0 spills a year (monitored since 2024) High-spill reason (company) Data collection - Tidal / river inundation Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed, Bathing Water and/or Shellfish Water investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 45 hours spilling →	Salary Brook	47	45	down 54%	100%
Devonshire Road Storm discharge at pumping station Company site name SOUTHMINSTER-DEVONSHIRE RD SP EA ID / permit AWS00336 · ASENF2251 Outlet location TQ9520099900 (OS grid reference) · View on Apple Maps WFD catchment CROUCH (GB520503704100) 2024 spills / hours 19 / 151 Long-term average 16.0 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 Volume & pollution Estimate from 44 hours spilling →	Asheldham Brook	8	44	down 58%	100%
Tolleshunt Knights Forge PS Storm discharge at pumping station Company site name TOLLESHUNT KNIGHTS-FORGE SP EA ID / permit AWS01394 · AW2NFE07368 Outlet location TL9060015220 (OS grid reference) · View on Apple Maps WFD catchment Layer Brook (GB105037034130) 2024 spills / hours 23 / 185 Long-term average 15.0 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 44 hours spilling →	Layer Brook	7	44	down 70%	100%
Brook Cottage Overflow on sewer network Company site name FINEDON-BROOKSIDE SSO EA ID / permit AWS00156 · AWNNF13436 Outlet location SP9121071780 (OS grid reference) · View on Apple Maps WFD catchment Ise - Lower (GB105032045140) 2024 spills / hours 35 / 102 Long-term average 36.0 spills a year (monitored since 2024) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Finedon Brook	37	44	up 6%	99%
Easton on the Hill STW Inlet overflow at sewage works Sewage works Easton On The Hill EA ID / permit AWS00390 · AW5NF5215 Outlet location TF0152004660 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 64 / 403 Long-term average 41.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Easton Brook River Welland Nt	26	44	down 59%	100%
Waddingham Green PS Storm discharge at pumping station Company site name WADDINGHAM-THE GREEN TPS EA ID / permit AWS01425 · ANNNF10109 Outlet location SK9863096150 (OS grid reference) · View on Apple Maps WFD catchment Black Dyke (trib of Ancholme) (GB104029061890) 2024 spills / hours 17 / 144 Long-term average 14.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Waddingham Beck	6	44	down 65%	100%
Ipswich Wolsey Street PS Storm discharge at pumping station Company site name Ipswich Wolsey Street Pumping Station EA ID / permit AWS00644 · AW4TS12083 Outlet location TM1599043910 (OS grid reference) · View on Apple Maps WFD catchment Gipping (d/s Stowmarket) (GB105035046280) 2024 spills / hours – / – Long-term average 36.8 spills a year (monitored since 2019) High-spill reason (company) Data collection - Tidal / river inundation 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 44 hours spilling →	River Orwell	66	44		100%
Huntingdon Godmanchester WRC Storm tank at sewage works Sewage works Huntingdon Godmanchester Company site name HUNTINGDON (GODMANCHESTER) STW EA ID / permit AWS00631 · AWCNF1106 Outlet location TL2652072290 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Roxton to Earith) (GB105033047921) 2024 spills / hours 66 / 1,344 Long-term average 22.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Bedford Ouse Nt	4	44	down 94%	100%
Drayton Rd No 3/Bootbinder Road CSO Overflow on sewer network Company site name Norwich Drayton Road No 3 / Bootbinder Road CSO EA ID / permit AWS00354 · EPREB3098VL Outlet location TG2221209936 (OS grid reference) · View on Apple Maps WFD catchment Wensum DS Norwich (GB105034055882) 2024 spills / hours 17 / 35 Long-term average 16.5 spills a year (monitored since 2024) Monitor below 90% Installation set-up/design issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	The River Wensum	16	44	down 6%	86%

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.