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
Thaxted - Park Street CSO Overflow on sewer network Company site name THAXTED-PARK STREET EA ID / permit AWS01354 · AW2NFE03679 Outlet location TL6115030430 (OS grid reference) · View on Apple Maps WFD catchment Chelmer (u/s Gt. Easton) (GB105037041220) 2024 spills / hours 16 / 21 Long-term average 27.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 44 hours spilling →	Trib of the River Chelmer	29	44	up 81%	100%
Great Yarmouth Bryants Quay PS Storm discharge at pumping station Company site name Great Yarmouth Bryants Quay Pumping Station EA ID / permit AWS00516 · AEETS12175 Outlet location TG5246006870 (OS grid reference) · View on Apple Maps WFD catchment BURE & WAVENEY & YARE & LOTHING (GB510503410700) Bathing water Great Yarmouth Pier; Great Yarmouth South 2024 spills / hours 74 / 45 Long-term average 76.3 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 43 hours spilling →	Tidal River Yare	64	43	down 14%	100%
Haughley Water Recycling Centre Storm tank at sewage works Sewage works Haughley Company site name HAUGHLEY-OLD ST STW EA ID / permit AWS00573 · AW4NF514B Outlet location TM0273461743 (OS grid reference) · View on Apple Maps WFD catchment Haughley Watercourse (GB105035046190) 2024 spills / hours 36 / 205 Long-term average 26.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 43 hours spilling →	Haughley Water Course River Gi	7	43	down 81%	100%
Earls Barton TPS Storm discharge at pumping station EA ID / permit AWS00368 · AWCNF2266 Outlet location SP8575062130 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Brampton Branch to conf Ise (GB105032045050) 2024 spills / hours 49 / 187 Long-term average 36.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 43 hours spilling →	River Nene	23	43	down 53%	100%
Fishtoft STW Storm tank at sewage works Sewage works Fishtoft EA ID / permit AWS00437 · ANNNF1069 Outlet location TF3667044500 (OS grid reference) · View on Apple Maps WFD catchment East & West Fen Drains (GB205030056405) 2024 spills / hours 32 / 293 Long-term average 13.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 43 hours spilling →	Hobhole Drain	9	43	down 72%	100%
Glemsford STW Storm tank at sewage works Sewage works Glemsford EA ID / permit AWS00469 · ASENF12342 Outlet location TL8338049170 (OS grid reference) · View on Apple Maps WFD catchment Glem - Lower (GB105036040970) 2024 spills / hours 21 / 360 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 43 hours spilling →	River Glem	4	43	down 81%	100%
Boston London Road Pumping Station Storm discharge at pumping station Company site name Boston London Road Pumping Station EA ID / permit AWS00100 · AW3NFF987 Outlet location TF3254042920 (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 48 / 341 Long-term average 33.0 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 42 hours spilling →	South Forty Foot Drain	7	42	down 85%	93%
Chelmsford Water Recycling Centre Storm tank at sewage works Sewage works Chelmsford Company site name CHELMSFORD STW EA ID / permit AWS00219 · AW2TSE9961 Outlet location TL8414007800 (OS grid reference) · View on Apple Maps WFD catchment BLACKWATER (GB520503714000) 2024 spills / hours 27 / 282 Long-term average 15.2 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 42 hours spilling →	Blackwater Est &Trib R.Chelmer	5	42	down 81%	100%
Stuntney Lower Street PS Storm discharge at pumping station Company site name STUNTNEY-LOWER STREET SP EA ID / permit AWS01328 · AECNF11072 Outlet location TL5545078050 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 20 / 169 Long-term average 13.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 42 hours spilling →	Tributary of Middle Fen Drain	3	42	down 85%	100%
Bainton PS Storm discharge at pumping station Company site name BAINTON TPS EA ID / permit AWS00043 · AWNNF2815 Outlet location TF0940006200 (OS grid reference) · View on Apple Maps WFD catchment Brook Drain (including Marholm Brook) (GB105031050595) 2024 spills / hours 50 / 772 Long-term average 29.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 42 hours spilling →	Trib R Welland	8	42	down 84%	100%
Greenfield - Mill Lane TPS Storm discharge at pumping station Company site name CSO and EO at Greenfield - Mill Lane TPS EA ID / permit AWS00519 · AWCNF2336 Outlet location TL0536035370 (OS grid reference) · View on Apple Maps WFD catchment Flit and Ivel Navigation d/s of Shefford (GB105033037790) 2024 spills / hours 39 / 393 Long-term average 22.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 42 hours spilling →	Ditch to River Flit	6	42	down 85%	100%
Runwell - Brock Hill CSO Overflow on sewer network Company site name RUNWELL-BROCK HILL OVERFLOW EA ID / permit AWS01073 · ASENF12108 Outlet location TQ7459094770 (OS grid reference) · View on Apple Maps WFD catchment Crouch (d/s Wickford) (GB105037028550) 2024 spills / hours 0 / 0.0 Long-term average 18.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 41 hours spilling →	tributary River Crouch	23	41	up from 0	97%
Great Yeldham - Poole Street CSO Overflow on sewer network Company site name GT YELDHAM-POOLE ST SM EA ID / permit AWS00517 · EPRNB3992WR Outlet location TL7646037580 (OS grid reference) · View on Apple Maps WFD catchment Colne (Gt. Yeldham - Doe's Corner) (GB105037041260) 2024 spills / hours 16 / 239 Long-term average 15.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 41 hours spilling →	River Colne	4	41	down 75%	100%
Mill Lane PS Storm discharge at pumping station Company site name THIMBLEBY-MILL LANE SP EA ID / permit AWS00846 · AW2NFE13570 Outlet location TL9882637424 (OS grid reference) · View on Apple Maps WFD catchment Box (GB105036040920) 2024 spills / hours 17 / 125 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 41 hours spilling →	River Box	7	41	down 59%	100%
Steeple Bumpstead PS-Nos.1,2,3 & 4 Storm discharge at pumping station Company site name STURMER-KEDINGTON RD TPS EA ID / permit AWS01290 · EPR/YB3299RB Outlet location TL6976944020 (OS grid reference) · View on Apple Maps WFD catchment Stour Brook (GB105036040950) 2024 spills / hours 16 / 158 Long-term average 10.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 41 hours spilling →	Bumpstead Brook	4	41	down 75%	100%
Scothern TPS Storm discharge at pumping station EA ID / permit AWS01109 · ANNNF13483 Outlet location TF0396077550 (OS grid reference) · View on Apple Maps WFD catchment Scothern Beck (GB105030062240) 2024 spills / hours 23 / 304 Long-term average 39.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 41 hours spilling →	Scothern Fen Drain	4	41	down 83%	100%
St Osyth STW Storm tank at sewage works Sewage works St Osyth EA ID / permit AWS01261 · AW2NFE08562 Outlet location TM1038013260 (OS grid reference) · View on Apple Maps WFD catchment Blackwater Outer (GB650503200000) 2024 spills / hours 23 / 244 Long-term average 20.2 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 Volume & pollution Estimate from 40 hours spilling →	Borrow Ditch Or Ray Creek	5	40	down 78%	100%
Colchester - Regent Court CSO Overflow on sewer network Company site name Colchester - Rowhedge Regent Court Combined Sewer Overflow EA ID / permit AWS00253 · ASETS15688 Outlet location TM0316021710 (OS grid reference) · View on Apple Maps WFD catchment COLNE (GB520503713800) Shellfish water Colne 2024 spills / hours 19 / 62 Long-term average 18.3 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 40 hours spilling →	The River Colne (Tidal)	11	40	down 42%	100%
Cambridge Water Recycling Centre Storm tank at sewage works Sewage works Cambridge Company site name Cambridge Water Recycling Centre EA ID / permit AWS00192 · ASCNF1033 Outlet location TL4835061530 (OS grid reference) · View on Apple Maps WFD catchment Cam (GB105033042750) 2024 spills / hours 23 / 259 Long-term average 14.4 spills a year (monitored since 2019) 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 40 hours spilling →	The River Cam	4	40	down 83%	100%
Boxted-Cottage (Suffolk) PS Storm discharge at pumping station Company site name BOXTED-COTTAGE (SUFFOLK) STW EA ID / permit AWS01573 · Permit Applied For Outlet location TL8271050670 (OS grid reference) · View on Apple Maps WFD catchment Glem - Lower (GB105036040970) 2024 spills / hours 23 / 318 Long-term average 3.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 40 hours spilling →	Glem - Lower	3	40	down 87%	100%
Uppingham STW Inlet overflow at sewage works Sewage works Uppingham EA ID / permit AWS01419 · AW5NF743 Outlet location SP8776099230 (OS grid reference) · View on Apple Maps WFD catchment Uppingham Brook (GB105031050530) 2024 spills / hours 0 / 0.0 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 40 hours spilling →	Uppingham Brook	24	40	up from 0	100%
Hullbridge-White Post Corner TPS Storm discharge at pumping station Company site name Hullbridge-White Post Corner Terminal Pumping Station EA ID / permit AWS00625 · AW2NFE18369 Outlet location TQ8060094140 (OS grid reference) · View on Apple Maps WFD catchment CROUCH (GB520503704100) 2024 spills / hours 27 / 225 Long-term average 15.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 40 hours spilling →	Trib of the River Crouch	4	40	down 85%	100%
Northill - Ickwell Road PS Storm discharge at pumping station Company site name NORTHILL-ICKWELL ROAD SP EA ID / permit AWS00920 · AW1NF368 Outlet location TL1502046060 (OS grid reference) · View on Apple Maps WFD catchment Ickwell Brook (GB105033037800) 2024 spills / hours 46 / 701 Long-term average 22.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 40 hours spilling →	trib River Ivel	4	40	down 91%	100%
Wainfleet STW Storm tank at sewage works Sewage works Wainfleet EA ID / permit AWS01428 · ANNNF10437 Outlet location TF4910059540 (OS grid reference) · View on Apple Maps WFD catchment Lymn / Steeping (GB105030062430) 2024 spills / hours 35 / 519 Long-term average 18.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	Tributary River Steeping Nt	4	39	down 89%	100%
Welton Le Wold WRC Inlet overflow at sewage works Sewage works Welton Le Wold Company site name WELTON-LE-WOLD STW EA ID / permit AWS01465 · AW3NFF1300 Outlet location TF2812087800 (OS grid reference) · View on Apple Maps WFD catchment Welton Le Wold to Louth Catch (trib of Lud) (GB104029061980) 2024 spills / hours 7 / 14 Long-term average 13.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	Trib of River Lud	9	39	up 29%	100%
Halesworth WRC Storm tank at sewage works Sewage works Halesworth Company site name HALESWORTH STW EA ID / permit AWS00549 · ASENF1286 Outlet location TM3925076620 (OS grid reference) · View on Apple Maps WFD catchment Blyth (Hevingham Hall - d/s Halesworth) (GB105035046030) 2024 spills / hours 38 / 260 Long-term average 26.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	The River Blyth Nt	7	39	down 82%	100%
Kettering Valley Walk CSO Overflow on sewer network Company site name KETTERING-VALLEY WALK SSO EA ID / permit AWS00672 · AW5NF1831 Outlet location SP8827078780 (OS grid reference) · View on Apple Maps WFD catchment Ise - Upper (GB105032045200) 2024 spills / hours 44 / 283 Long-term average 64.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	The River Ise	14	39	down 68%	92%
Ashton Water Recycling Centre Storm tank at sewage works Sewage works Ashton Company site name ASHTON STW EA ID / permit AWS00029 · AW1NF1362 Outlet location SP7679048820 (OS grid reference) · View on Apple Maps WFD catchment Tove (DS Greens Norton) (GB105033038180) 2024 spills / hours 0 / 0.0 Long-term average 1.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	Salcey Brook	6	39	up from 0	100%
King'S Meadow Lane Overflow on sewer network Company site name HIGHAM FERRERS-KINGS MEADOW SP EA ID / permit AWS00696 · AWNNF10269 Outlet location SP9527069410 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Ise to Islip (GB105032050383) 2024 spills / hours 44 / 254 Long-term average 29.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 39 hours spilling →	River Nene	15	39	down 66%	100%
Steeple Bumpstead PS-Nos.1,2,3 & 4 Storm discharge at pumping station Company site name STEEPLE BUMPSTEAD-BLOIS RD TPS EA ID / permit AWS01288 · AW2NFE15068 Outlet location TL6830241546 (OS grid reference) · View on Apple Maps WFD catchment Bumpstead Brook (GB105036040910) 2024 spills / hours 6 / 51 Long-term average 8.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	Bumpstead Brook	9	39	up 50%	100%
Desborough Sewage PS Storm discharge at pumping station Company site name DESBOROUGH SP EA ID / permit AWS00331 · AW5NF689 Outlet location SP8093082580 (OS grid reference) · View on Apple Maps WFD catchment Ise - Upper (GB105032045200) 2024 spills / hours 34 / 172 Long-term average 23.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	River Ise	15	39	down 56%	100%
Starr Carr Lane Pumping Station Storm discharge at pumping station Company site name WRAWBY-STARR CARR LA SP EA ID / permit AWS01279 · AWNNF13443 Outlet location TA0134009320 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 14 / 68 Long-term average 16.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 39 hours spilling →	Unnamed Drain	14	39	no change	100%
West Fen Rd PS Ely Storm discharge at pumping station Company site name ELY-WEST FEN ROAD SP EA ID / permit AWS01470 · AWCNF3192/11351 Outlet location TL5286080900 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 18 / 128 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 39 hours spilling →	a Littleport & Downham Idb Dra	6	39	down 67%	100%
Kislingbury Baptist Chapel SSO Overflow on sewer network Company site name KISLINGBURY-BAPTIST CHAPEL SSOAA EA ID / permit AWS00703 · AW5NF2148 Outlet location SP6947159490 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Whilton Branch to conf Brampton Branch (GB105032045320) 2024 spills / hours 39 / 289 Long-term average 26.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 38 hours spilling →	Trib River Nene	14	38	down 64%	99%
Southwold WRC Storm tank at sewage works Sewage works Southwold Company site name SOUTHWOLD-COMMON THE STW EA ID / permit AWS01205 · ASETS10380 Outlet location TM4949075740 (OS grid reference) · View on Apple Maps WFD catchment BLYTH (S) (GB510503503700) 2024 spills / hours 22 / 35 Long-term average 19.6 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 38 hours spilling →	The Tidal River Blyth	25	38	up 14%	100%
Brightlingsea West Dyke Terminal PS Storm discharge at pumping station Company site name Brightlingsea West Dyke Terminal Pumping Station EA ID / permit AWS00147 · ASENF3284/12161 Outlet location TM0812016630 (OS grid reference) · View on Apple Maps WFD catchment Colne Essex (GB520503713800) Bathing water Brightlingsea Shellfish water Colne 2024 spills / hours 8 / 63 Long-term average 58.0 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 38 hours spilling →	West Dyke (to Colne Estuary)	8	38	no change	100%
Winterton - Earlsgate PS Storm discharge at pumping station Company site name WINTERTON-EARLSGATE SP EA ID / permit AWS01514 · AW3NFF1044 Outlet location SE9372018250 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 4 / 45 Long-term average 3.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 38 hours spilling →	Trib of Winterton Homes Dr	8	38	up 100%	100%
Sible Hedingham STW Storm tank at sewage works Sewage works Sible Hedingham EA ID / permit AWS01132 · ASENF10532 Outlet location TL7934032970 (OS grid reference) · View on Apple Maps WFD catchment Colne (Gt. Yeldham - Doe's Corner) (GB105037041260) 2024 spills / hours 23 / 155 Long-term average 19.3 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 38 hours spilling →	River Colne	12	38	down 48%	100%
Wickford PS Storm discharge at pumping station Company site name WICKFORD-WOOLSHOTS A and B SP EA ID / permit AWS01495 · AW2NFE2254 Outlet location TQ7254493224 (OS grid reference) · View on Apple Maps WFD catchment Crouch (A129 - Wickford) (GB105037028540) 2024 spills / hours 33 / 427 Long-term average 17.7 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 38 hours spilling →	River Crouch	4	38	down 88%	100%
Nightlayers Fen Term PS Storm discharge at pumping station Company site name CHATTERIS-NIGHTLAYER STW TPS EA ID / permit AWS00883 · AECNF10511 Outlet location TL3950087300 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 35 / 131 Long-term average 22.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 38 hours spilling →	Tributary Nightlayers Fen Drai	10	38	down 71%	100%
Fen Road PS Storm discharge at pumping station Company site name WASHINGBOROUGH-FEN RD TPS EA ID / permit AWS00430 · AW3NFF589 Outlet location TF0290070700 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Catchwater Drain to conf Bain (GB205030062425) 2024 spills / hours 9 / 34 Long-term average 7.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 38 hours spilling →	Unknown trib.	5	38	down 44%	100%
Northampton, Blue Lagoon CSO Overflow on sewer network EA ID / permit AWS01570 · Permit Applied For Outlet location SP7303059733 (OS grid reference) · View on Apple Maps WFD catchment Brampton Branch - Lower (GB105032045390) 2024 spills / hours 48 / 65 Long-term average 38.0 spills a year (monitored since 2024) 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 38 hours spilling →	Brampton Branch - Lower	38	38	down 21%	98%
Thistle Drive PS Storm discharge at pumping station Company site name PETBORO-STANGD THISTLE DR SP EA ID / permit AWS01367 · AWCNF428/10348 Outlet location TL2084097260 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 23 / 182 Long-term average 14.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 37 hours spilling →	Trib Kings Dyke	6	37	down 74%	100%
Benhall Water Recycling Centre Storm tank at sewage works Sewage works Benhall Company site name BENHALL STW EA ID / permit AWS00081 · ASENF/2052 Outlet location TM3822060570 (OS grid reference) · View on Apple Maps WFD catchment Fromus (GB105035045980) 2024 spills / hours 7 / 32 Long-term average 8.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 37 hours spilling →	River Fromus River Alde Nt	4	37	down 43%	100%
Maldon Water Recycling Centre Storm tank at sewage works Sewage works Maldon Company site name Maldon STW EA ID / permit AWS00803 · ASENF1136 Outlet location TL8914007420 (OS grid reference) · View on Apple Maps WFD catchment BLACKWATER (GB520503714000) Shellfish water Osea Island 2024 spills / hours 24 / 401 Long-term average 40.7 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 37 hours spilling →	Tributary of Pennys Brook	4	37	down 83%	100%
Barley STW Inlet overflow at sewage works Sewage works Barley EA ID / permit AWS00050 · AW1NF1250 Outlet location TL4045039140 (OS grid reference) · View on Apple Maps WFD catchment Rhee (DS Wendy) (GB105033037610) 2024 spills / hours 30 / 86 Long-term average 24.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 37 hours spilling →	Trib of Fowlmere Stream	29	37	down 3%	100%
Basildon Water Recycling Centre Storm tank at sewage works Sewage works Basildon Company site name Basildon Wastewater Treatment Works EA ID / permit AWS00063 · CNTW.1280 Outlet location TQ7370090650 (OS grid reference) · View on Apple Maps WFD catchment Crouch (A129 - Wickford) (GB105037028540) 2024 spills / hours 24 / 259 Long-term average 19.3 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 37 hours spilling →	Pitsea Creek	10	37	down 58%	100%
High Street Manhole Overflow on sewer network Company site name High Street, Fiskerton EA ID / permit AWS00594 · ANNNF10232 Outlet location TF0497071810 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Catchwater Drain to conf Bain (GB205030062425) 2024 spills / hours 12 / 42 Long-term average 8.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 37 hours spilling →	Unknown trib. North Delph	6	37	down 50%	100%
Garrison Road Pumping Station Storm discharge at pumping station Company site name GT YARMOUTH-GARRISON RD SP EA ID / permit AWS00459 · AEETS12174 Outlet location TG5219008290 (OS grid reference) · View on Apple Maps WFD catchment BURE & WAVENEY & YARE & LOTHING (GB510503410700) 2024 spills / hours 42 / 49 Long-term average 51.0 spills a year (monitored since 2023) 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 37 hours spilling →	Tidal River Bure	33	37	down 21%	100%
Healing - Poplar Road SSO Overflow on sewer network Company site name HEALING-POPLAR RD SSO EA ID / permit AWS00580 · ANNNF2535 Outlet location TA2178011000 (OS grid reference) · View on Apple Maps WFD catchment Mawnbridge Drain (GB104029067540) 2024 spills / hours 12 / 52 Long-term average 9.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 37 hours spilling →	Old Fleet Drain	6	37	down 50%	98%

Sewage treatment works

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

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