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
Hibaldstow STW (SPS) Inlet overflow at sewage works Sewage works Hibaldstow Company site name HIBALDSTOW STW EA ID / permit AWS00591 · ANNNF2373 Outlet location SE9796004700 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 3 / 2.5 Long-term average 15.8 spills a year (monitored since 2022) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 191 hours spilling →	Trib New R Ancholme	40	191	up 1233%	100%
Wimpole Road PS Storm discharge at pumping station Company site name Wimpole Road Pumping Station EA ID / permit AWS01507 · AW1NF1543 Outlet location TL3980053740 (OS grid reference) · View on Apple Maps WFD catchment Bourn Brook (GB105033042690) 2024 spills / hours 49 / 677 Long-term average 31.3 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 190 hours spilling →	Tit Brook	18	190	down 63%	100%
Uttons Drove Water Recycling Centr Storm tank at sewage works Sewage works Uttons Drove Water Recycling Centr Company site name Uttons Drove Water Recycling Centre EA ID / permit AWS01421 · ASCNF/1232 Outlet location TL3671065210 (OS grid reference) · View on Apple Maps WFD catchment Swavesey Drain (GB105033042770) 2024 spills / hours 31 / 397 Long-term average 26.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 187 hours spilling →	Swavesey Drain	21	187	down 32%	99%
Sherington Water Recycling Centre Storm tank at sewage works Sewage works Sherington Company site name SHERINGTON STW EA ID / permit AWS01124 · AW1NF1079 Outlet location SP8778046020 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) 2024 spills / hours 68 / 1,072 Long-term average 37.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 186 hours spilling →	River Great Ouse Nt	16	186	down 76%	100%
Jaywick Water Recycling Centre Inlet overflow at sewage works Sewage works Jaywick Company site name JAYWICK NEW STW EA ID / permit AWS00664 · AEECS12400 Outlet location TM1374012190 (OS grid reference) · View on Apple Maps WFD catchment Essex (GB650503520001) 2024 spills / hours 86 / 504 Long-term average 74.2 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 186 hours spilling →	The North Sea	52	186	down 40%	100%
Market Harborough-Riverside Road Overflow on sewer network Company site name MARKET HARBOROUGH-RIVERSIDESSO EA ID / permit AWS00815 · AW5NF1798 Outlet location SP7435087380 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Jordan to conf Langton Bk (GB105031045610) 2024 spills / hours 21 / 224 Long-term average 12.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 185 hours spilling →	River Welland	17	185	down 19%	100%
Fulbeck STW Storm tank at sewage works Sewage works Fulbeck EA ID / permit AWS00456 · ANNNF13059 Outlet location SK9406050720 (OS grid reference) · View on Apple Maps WFD catchment Fulbeck Beck (GB105030056120) 2024 spills / hours 95 / 879 Long-term average 75.3 spills a year (monitored since 2022) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 183 hours spilling →	The Beck	37	183	down 61%	100%
North Hykeham Water Recycling Centr Storm tank at sewage works Sewage works North Hykeham Water Recycling Centr Company site name NORTH HYKEHAM STW EA ID / permit AWS00894 · ANNNF1153 Outlet location SK9570066150 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Brant to conf Catchwater Drain (GB105030062370) 2024 spills / hours 26 / 285 Long-term average 21.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 182 hours spilling →	The River Witham	17	182	down 35%	100%
Elsworth - Rogers Close PS Storm discharge at pumping station Company site name ELSWORTH-ROGERS CL SP EA ID / permit AWS00404 · AWCNF11472 Outlet location TL3174063880 (OS grid reference) · View on Apple Maps WFD catchment Fen Drayton Drain (GB105033042740) 2024 spills / hours 40 / 648 Long-term average 22.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 180 hours spilling →	Elsworth Brook	14	180	down 65%	100%
Richmond Drive TPS Storm discharge at pumping station Company site name SKEGNESS-RICHMOND DR TPS EA ID / permit AWS01049 · ANNNF13482 Outlet location TF5539061760 (OS grid reference) · View on Apple Maps WFD catchment Cow Bank Drain (GB105030056440) 2024 spills / hours 19 / 179 Long-term average 16.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 179 hours spilling →	Croft Bank Drain	20	179	up 5%	100%
King'S Lynn Tunnel PS Storm discharge at pumping station Company site name KINGS LYNN-NAR LANE SP EA ID / permit AWS00690 · AECTS10364 Outlet location TF6166019100 (OS grid reference) · View on Apple Maps WFD catchment GREAT OUSE (GB530503300300) 2024 spills / hours 75 / 184 Long-term average 66.2 spills a year (monitored since 2020) 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 178 hours spilling →	Tidal River Great Ouse	75	178	no change	100%
Sibsey Water Recycling Centre Storm tank at sewage works Sewage works Sibsey Company site name SIBSEY STW EA ID / permit AWS01133 · ANNNF10527 Outlet location TF3617051080 (OS grid reference) · View on Apple Maps WFD catchment East & West Fen Drains (GB205030056405) 2024 spills / hours 38 / 480 Long-term average 37.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 178 hours spilling →	Mallows Drain Hobhole Drain	18	178	down 53%	100%
Tollesbury Water Recycling Centre Storm tank at sewage works Sewage works Tollesbury Company site name Tollesbury Water Recycling Centre EA ID / permit AWS01392 · ASETS1229 Outlet location TL9651011030 (OS grid reference) · View on Apple Maps WFD catchment BLACKWATER (GB520503714000) Shellfish water Tollesbury Channel 2024 spills / hours 50 / 828 Long-term average 57.9 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 178 hours spilling →	Tollesbury Fleet to Blackwater	17	178	down 66%	100%
Mundesley-Knapton Road WRC Inlet overflow at sewage works Sewage works Mundesley Knapton Road Company site name Mundesley-Knapton Road WRC EA ID / permit AWS00858 · AEECS12411 Outlet location TG3263037820 (OS grid reference) · View on Apple Maps WFD catchment Norfolk East (GB650503520003) 2024 spills / hours 87 / 372 Long-term average 52.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing Improvement Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 177 hours spilling →	North Sea	56	177	down 36%	100%
Conger Lane Storm Overflow Overflow on sewer network Company site name TODDINGTON-CONGER LANE SSO EA ID / permit AWS00273 · AW1NF2734 Outlet location TL0120028700 (OS grid reference) · View on Apple Maps WFD catchment Flit (GB105033037640) 2024 spills / hours 10 / 11 Long-term average 19.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 175 hours spilling →	Trib Fancott Brook	28	175	up 180%	97%
Frampton STW Storm tank at sewage works Sewage works Frampton EA ID / permit AWS00452 · ANNNF10441 Outlet location TF3132039790 (OS grid reference) · View on Apple Maps WFD catchment Black Sluice IDB draining to the South Forty Foot Drain (GB205030051515) 2024 spills / hours 60 / 1,093 Long-term average 40.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 175 hours spilling →	Frampton Town Drain	12	175	down 80%	100%
Tiffield STW Storm tank at sewage works Sewage works Tiffield EA ID / permit AWS01382 · AWCNF1584 Outlet location SP7010051080 (OS grid reference) · View on Apple Maps WFD catchment Shutlanger Brook (GB105033038270) 2024 spills / hours 118 / 2,215 Long-term average 65.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 174 hours spilling →	Hulcote Brook Nt River Tove	23	174	down 81%	100%
Caistor Water Recycling Centre Storm tank at sewage works Sewage works Caistor Company site name CAISTOR STW EA ID / permit AWS00189 · AW3NFF232 Outlet location TA1071001100 (OS grid reference) · View on Apple Maps WFD catchment Caistor Canal Catchment (trib of Ancholme) (GB104029061920) 2024 spills / hours 9 / 99 Long-term average 56.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 172 hours spilling →	Caistor Canal River Ancholme	20	172	up 122%	93%
Barton PS Storm discharge at pumping station Company site name BARTON LE CLAY STW EA ID / permit AWS00060 · AW1NF1363 Outlet location TL0860032600 (OS grid reference) · View on Apple Maps WFD catchment Barton Brook (GB105033037500) 2024 spills / hours 43 / 576 Long-term average 27.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 171 hours spilling →	Barton Brook	11	171	down 74%	98%
Shenfield STW No 2 PS Storm discharge at pumping station Company site name SHENFIELD AND HUTTON STW EA ID / permit AWS01121 · ASENF12210 Outlet location TQ6527096000 (OS grid reference) · View on Apple Maps WFD catchment Wid (Doddinghurst Brook - Shenfield STW) (GB105037028680) 2024 spills / hours 52 / 380 Long-term average 42.0 spills a year (monitored since 2024) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 171 hours spilling →	Tributary of River Wid	32	171	down 38%	100%
Stonely - Oldford Lane TPS Storm discharge at pumping station Company site name STONELY OLD FORD LANE SSO 2 EA ID / permit AWS01307 · AWCNF2777 Outlet location TL1057067040 (OS grid reference) · View on Apple Maps WFD catchment Kym (and Til) (GB105033042980) 2024 spills / hours 62 / 883 Long-term average 43.5 spills a year (monitored since 2024) Monitor below 90% Power failure / issue · Resolved - Jun Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 169 hours spilling →	The River Kym	25	169	down 60%	47%
Humberston - Humberston Road CSO Overflow on sewer network Company site name HUMBERSTONE-HUMBERSTONE RD SSO EA ID / permit AWS00626 · ANNNF2313 Outlet location TA3059006060 (OS grid reference) · View on Apple Maps WFD catchment Buck Beck from Source to N Sea (GB104029062110) 2024 spills / hours 44 / 211 Long-term average 49.5 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 169 hours spilling →	Tributary of Little Buck Beck	41	169	down 7%	100%
Bedfield Crown Lane Pumping Station Storm discharge at pumping station Company site name BEDFIELD-CROWN LA SP EA ID / permit AWS00070 · ASENF19720 Outlet location TM2238066480 (OS grid reference) · View on Apple Maps WFD catchment Chickering Beck (GB105034045690) 2024 spills / hours 73 / 1,187 Long-term average 30.2 spills a year (monitored since 2021) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 168 hours spilling →	Trib River Waveney	11	168	down 85%	100%
Brook Road PS Storm discharge at pumping station Company site name TOLLESHUNT KNIGHTS-BROOK R TPS EA ID / permit AWS00157 · AEENF3773/12430 Outlet location TL9115015030 (OS grid reference) · View on Apple Maps WFD catchment Layer Brook (GB105037034130) 2024 spills / hours 31 / 295 Long-term average 31.5 spills a year (monitored since 2024) 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 168 hours spilling →	The Layer Brook	32	168	up 3%	100%
Cosgrove CSO Overflow on sewer network Company site name COSGROVE-DOGSMOUTH SO SSO EA ID / permit AWS00282 · AWCNF11624 Outlet location SP7826041720 (OS grid reference) · View on Apple Maps WFD catchment Potterspury Brook (GB105033037990) 2024 spills / hours 118 / 1,518 Long-term average 60.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 166 hours spilling →	Dogsmouth Brook	26	166	down 78%	99%
Lyddington WRC Inlet overflow at sewage works Sewage works Lyddington Company site name LYDDINGTON STW EA ID / permit AWS00794 · Permit Applied For Outlet location SP8797696496 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 22 / 120 Long-term average 21.5 spills a year (monitored since 2023) Monitor below 90% Installation set-up/design issue · Scheduled Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 166 hours spilling →	Lyddington Brook. River Wellan	21	166	down 5%	88%
Hardwick (W) PS Storm discharge at pumping station Company site name HARDWICK-WEST SP EA ID / permit AWS00556 · AWCNF11309 Outlet location TL3639059740 (OS grid reference) · View on Apple Maps WFD catchment Old West River (GB205033043375) 2024 spills / hours 104 / 1,977 Long-term average 80.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 166 hours spilling →	unnamed culverted watercourse	12	166	down 88%	99%
Drayton Parslow STW Other storm discharge asset type (with treatment) EA ID / permit AWS00353 · AW1NF/1451 Outlet location SP8485028730 (OS grid reference) · View on Apple Maps WFD catchment Ouzel US Caldecote Mill (GB105033037971) Treatment Reed bed 2024 spills / hours 122 / 350 Long-term average 74.3 spills a year (monitored since 2022) 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 164 hours spilling →	Tributary River Ouzel	55	164	down 55%	100%
Marston (Grantham) WRC Storm tank at sewage works Sewage works Marston Company site name MARSTON STW (LINCS) EA ID / permit AWS00822 · ANNNF10436 Outlet location SK9087042860 (OS grid reference) · View on Apple Maps WFD catchment Witham - conf Cringle Bk to conf Brant (GB105030056780) 2024 spills / hours 54 / 808 Long-term average 42.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 162 hours spilling →	The River Witham	16	162	down 70%	100%
Ingoldmells WRC Inlet overflow at sewage works Sewage works Ingoldmells Company site name INGOLDMELLS STW EA ID / permit AWS00641 · ANNCS13577 Outlet location TF5971069000 (OS grid reference) · View on Apple Maps WFD catchment Lincolnshire (GB640402492000) 2024 spills / hours 36 / 133 Long-term average 43.7 spills a year (monitored since 2020) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 160 hours spilling →	North Sea	72	160	up 100%	97%
Whilton TPS Storm discharge at pumping station EA ID / permit AWS01559 · AW5NF595 Outlet location SP6401064840 (OS grid reference) · View on Apple Maps WFD catchment NENE (GB530503200200) 2024 spills / hours 171 / 3,419 Long-term average 96.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 159 hours spilling →	River Nene	21	159	down 88%	95%
North Thoresby WRC Storm tank at sewage works Sewage works North Thoresby Company site name NORTH THORESBY STW EA ID / permit AWS00901 · ANNNF10292 Outlet location TF2909098960 (OS grid reference) · View on Apple Maps WFD catchment New Dike Catchment (trib of Louth Canal) (GB104029062030) 2024 spills / hours 39 / 330 Long-term average 38.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 157 hours spilling →	Bond Croft Drain	25	157	down 36%	100%
Holton Le Clay STW Storm tank at sewage works Sewage works Holton Le Clay EA ID / permit AWS00613 · ANNNF1105 Outlet location TA2967003080 (OS grid reference) · View on Apple Maps WFD catchment Waithe Beck lower catchment (to Tetney Lock) (GB104029062100) 2024 spills / hours 50 / 752 Long-term average 55.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 155 hours spilling →	Holton Beck Louth Canal	20	155	down 60%	99%
Witchford STW Storm tank at sewage works Sewage works Witchford EA ID / permit AWS01523 · AECNF1402 Outlet location TL5086079930 (OS grid reference) · View on Apple Maps WFD catchment Old Bedford River / River Delph (inc The Hundred Foot Washes) (GB205033000060) 2024 spills / hours 69 / 669 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 155 hours spilling →	Fen Drain River Great Ouse	26	155	down 62%	100%
Wansford PS Storm discharge at pumping station Company site name WANSFORD SP EA ID / permit AWS01435 · AWNNF2795 Outlet location TL0760099400 (OS grid reference) · View on Apple Maps WFD catchment Nene - Islip to tidal (GB105032050381) 2024 spills / hours 56 / 969 Long-term average 34.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 155 hours spilling →	R Nene	13	155	down 77%	100%
Molesworth STW Storm tank at sewage works Sewage works Molesworth EA ID / permit AWS00851 · AWCNF11400 Outlet location TL0749075330 (OS grid reference) · View on Apple Maps WFD catchment Ellington Brook (GB105033042870) 2024 spills / hours 40 / 603 Long-term average 32.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 155 hours spilling →	Ellington Brook	13	155	down 68%	98%
Ipswich-Cliff Quay WRC Storm tank at sewage works Sewage works Ipswich Cliff Quay Company site name IPSWICH-CLIFF QUAY RAEBURN ST EA ID / permit AWS00645 · AEETS12128 Outlet location TM1717041500 (OS grid reference) · View on Apple Maps WFD catchment ORWELL (GB520503613601) 2024 spills / hours 61 / 316 Long-term average 65.8 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 154 hours spilling →	tidal River Orwell	41	154	down 33%	100%
Broadholme Water Recycling Centre Storm tank at sewage works Sewage works Broadholme Company site name BROADHOLME STW EA ID / permit AWS00154 · AWNNF3344/13399 Outlet location SP9410068580 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Ise to Islip (GB105032050383) 2024 spills / hours 76 / 1,445 Long-term average 39.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 153 hours spilling →	River Nene	12	153	down 84%	100%
Stoke Albany STW Storm tank at sewage works Sewage works Stoke Albany EA ID / permit AWS01302 · AWNNF13384 Outlet location SP8052088710 (OS grid reference) · View on Apple Maps WFD catchment Stoke Albany Brook (GB105031045640) 2024 spills / hours 29 / 246 Long-term average 18.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 152 hours spilling →	tributary River Welland	12	152	down 59%	100%
Storm Sewer Overflow Crowfield PS Storm discharge at pumping station Company site name CROWFIELD SP EA ID / permit AWS01317 · AW1NF809 Outlet location SP6180041600 (OS grid reference) · View on Apple Maps WFD catchment Syresham Stream (GB105033037980) 2024 spills / hours 59 / 648 Long-term average 38.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 152 hours spilling →	Syresham Stream	20	152	down 66%	100%
Normanby Park Pumping Station Storm discharge at pumping station Company site name NORMANBY-PARK SP EA ID / permit AWS00888 · ANNNF13442 Outlet location SE8845016910 (OS grid reference) · View on Apple Maps WFD catchment Winterton Beck from Source to the Humber (GB104029067660) 2024 spills / hours 3 / 8.3 Long-term average 15.7 spills a year (monitored since 2020) 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 152 hours spilling →	Unnamed Drain	48	152	up 1500%	100%
Great Horwood STW Inlet overflow at sewage works Sewage works Great Horwood EA ID / permit AWS00502 · AW1NF2722 Outlet location SP7735030660 (OS grid reference) · View on Apple Maps WFD catchment Horwood Tributary (GB105033038200) 2024 spills / hours 49 / 511 Long-term average 34.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 152 hours spilling →	Horwood Brk/Claydon Brk River	18	152	down 63%	100%
Carr Lane Pumping Station Storm discharge at pumping station Company site name WORLABY-CARR LA SP EA ID / permit AWS00201 · AWNNF13445 Outlet location TA0082013610 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 24 / 131 Long-term average 26.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 149 hours spilling →	Unnamed Drain	28	149	up 17%	100%
Barton Le Clay Water Recycling Cntr Storm tank at sewage works Sewage works Barton Le Clay Water Recycling Cntr Company site name BARTON LE CLAY STW EA ID / permit AWS00058 · AWCNF11060 Outlet location TL0853032640 (OS grid reference) · View on Apple Maps WFD catchment Barton Brook (GB105033037500) 2024 spills / hours 78 / 1,081 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 148 hours spilling →	Barton Brook	15	148	down 81%	100%
Scaldwell (Ex STW) Pumping Station Storm discharge at pumping station Company site name SCALDWELL SP EA ID / permit AWS01104 · AWNNF13355 Outlet location SP7754072620 (OS grid reference) · View on Apple Maps WFD catchment Pitsford Arm of the Brampton Branch (GB105032045470) 2024 spills / hours 79 / 1,411 Long-term average 44.3 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 148 hours spilling →	The Scaldwell Brook	12	148	down 85%	100%
Stukeley-Low Road TPS Storm discharge at pumping station Company site name Stukeley - Low Road Terminal Pumping Station EA ID / permit AWS01327 · AWCNF2771 Outlet location TL2063074730 (OS grid reference) · View on Apple Maps WFD catchment Alconbury and Brampton Brooks (GB105033042790) 2024 spills / hours 47 / 574 Long-term average 40.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 148 hours spilling →	Alconbury Brook	14	148	down 70%	100%
Toppesfield STW Storm tank at sewage works Sewage works Toppesfield EA ID / permit AWS01395 · ASENF1318 Outlet location TL7406036540 (OS grid reference) · View on Apple Maps WFD catchment Toppesfield Brook (GB105037041250) 2024 spills / hours 78 / 710 Long-term average 45.8 spills a year (monitored since 2021) High-spill reason (company) Performance - GW inundation Monitor below 90% Comms failure / issue · Resolved - Dec Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed, Bathing Water and/or Shellfish Water investigation ongoing Improvement UWWTR improvement ongoing, Operational improvement ongoing Volume & pollution Estimate from 145 hours spilling →	Toppesfield Brook River Colne	40	145	down 49%	86%
Lavendon Water Recycling Centre Storm tank at sewage works (with treatment) Sewage works Lavendon Company site name LAVENDON STW EA ID / permit AWS00711 · AW1NF1012A Outlet location SP9123052690 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) Treatment Reed bed 2024 spills / hours 102 / 600 Long-term average 53.8 spills a year (monitored since 2020) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 142 hours spilling →	Lavendon Brook River Great Ous	37	142	down 64%	100%
Tilbury Water Recycling Centre Inlet overflow at sewage works Sewage works Tilbury Company site name Tilbury Water Recycling Centre EA ID / permit AWS01383 · CNTW.0532 Outlet location TQ6565075310 (OS grid reference) · View on Apple Maps WFD catchment THAMES MIDDLE (GB530603911402) 2024 spills / hours 56 / 162 Long-term average 60.0 spills a year (monitored since 2024) 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 142 hours spilling →	Ouse (Newport Pagnell to Roxton)	64	142	up 14%	100%
Lowick SPS Storm discharge at pumping station Company site name LOWICK-DRAYTON ROAD TPS EA ID / permit AWS00789 · AWNNF2440 Outlet location SP9760080700 (OS grid reference) · View on Apple Maps WFD catchment Harpers Brook (GB105032045230) 2024 spills / hours 62 / 833 Long-term average 38.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 141 hours spilling →	Harpers Brook	14	141	down 77%	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.