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
Ingoldmells Haven PS (Wcr) Storm discharge at pumping station Company site name Ingoldmells Haven Pumping Station (Ingoldmells WRC) EA ID / permit AWS00640 · ANNTS3539/13470 Outlet location TF5971069000 (OS grid reference) · View on Apple Maps WFD catchment Lincolnshire (GB640402492000) Bathing water Ingoldmells South 2024 spills / hours 8 / 27 Long-term average 6.1 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	North Sea	4	14	down 50%	100%
St. Ives - Meadow Lane PS Storm discharge at pumping station Company site name ST IVES-MEADOW LANE PS EA ID / permit AWS01267 · AWCNF11339 Outlet location TL3192071190 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Roxton to Earith) (GB105033047921) 2024 spills / hours 54 / 70 Long-term average 32.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 14 hours spilling →	River Gr Ouse/ Ml Gravel Pit	15	14	down 72%	100%
Promenade Sewer Storage Tank Storm discharge at pumping station Company site name Promenade Sewer Storage Tank EA ID / permit AWS01012 · AEECS12053 Outlet location TG2481041080 (OS grid reference) · View on Apple Maps WFD catchment Norfolk East (GB650503520003) 2024 spills / hours 14 / 13 Long-term average 21.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	North Sea	11	14	down 21%	100%
Southend - Belton Gardens PS Storm discharge at pumping station Company site name SOUTHEND-WOODGRANGE DRIVE CSO 1 EA ID / permit AWS01182 · S/WR88 Outlet location TQ9018084610 (OS grid reference) · View on Apple Maps WFD catchment THAMES LOWER (GB530603911401) Bathing water Southend Jubilee 2024 spills / hours 165 / 1,633 Long-term average 89.0 spills a year (monitored since 2024) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Thames Estuary	13	14	down 92%	95%
Wisbechroad/Police House Overflow on sewer network Company site name MARCH-WISBECH RD OV EA ID / permit AWS01518 · AECNF11504 Outlet location TL4092096930 (OS grid reference) · View on Apple Maps WFD catchment Middle Level (GB205033000050) 2024 spills / hours 17 / 43 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 14 hours spilling →	River Nene (Old Course)	12	14	down 29%	96%
Normanby by Spital STW Inlet overflow at sewage works Sewage works Normanby By Spital Company site name OWMBY STW EA ID / permit AWS00887 · AW3NFF254 Outlet location TF0020087300 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Source to Bishopbridge (GB104029061850) 2024 spills / hours 2 / 12 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 14 hours spilling →	Unknown trib.	4	14	up 100%	100%
Reydon Terminal Pumping Station Storm discharge at pumping station Company site name REYDON-THREE MARSH LN TPS EA ID / permit AWS01047 · ASENF590/10383 Outlet location TM4983076610 (OS grid reference) · View on Apple Maps WFD catchment BLYTH (S) (GB510503503700) 2024 spills / hours 13 / 249 Long-term average 7.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Buss Creek	2	14	down 85%	100%
Old Leake (Skipmarsh) STW Storm tank at sewage works Sewage works Old Leake Company site name OLD LEAKE-SKIPMARSH LANE STW EA ID / permit AWS00953 · ANNNF13041 Outlet location TF3886050470 (OS grid reference) · View on Apple Maps WFD catchment East & West Fen Drains (GB205030056405) 2024 spills / hours 19 / 86 Long-term average 10.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Leak Gride Drain	3	14	down 84%	100%
Maidenhall Storm Outfall Overflow on sewer network Company site name Maidenhall Combined Sewer Overflow EA ID / permit AWS00797 · AW4TS1429 Outlet location TM1662042670 (OS grid reference) · View on Apple Maps WFD catchment ORWELL (GB520503613601) 2024 spills / hours 78 / 176 Long-term average 36.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	River Orwell T	22	14	down 72%	100%
Ness Point Pumping Station Storm discharge at pumping station Company site name LOWESTOFT-NESS POINT TPS EA ID / permit AWS00869 · ASECS12402 Outlet location TM5566093740 (OS grid reference) · View on Apple Maps WFD catchment Suffolk (GB650503520002) 2024 spills / hours 8 / 14 Long-term average 11.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	North Sea	16	14	up 100%	95%
Norton(Northants) STW Storm tank at sewage works Sewage works Norton Company site name NORTON STW (NORTHANTS) EA ID / permit AWS00922 · AW5NF247 Outlet location SP6030064100 (OS grid reference) · View on Apple Maps WFD catchment Whilton Branch - Lower (GB105032045340) 2024 spills / hours 119 / 228 Long-term average 60.2 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Norton Brook Grand Union Canal	15	14	down 87%	100%
Creaton SPS Storm discharge at pumping station Company site name CREATON HOSPITAL SM EA ID / permit AWS00292 · AW5NF53 Outlet location SP6980071700 (OS grid reference) · View on Apple Maps WFD catchment Hollowell Arm of Spratton Brook (GB105032045510) 2024 spills / hours 46 / 223 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 14 hours spilling →	Un-named trib River Nene	6	14	down 87%	100%
Malcolm Drive CSO Overflow on sewer network Company site name NORTHAMPTON-MALCOLM DRIVE SSO EA ID / permit AWS00801 · AW5NF352 Outlet location SP7381060470 (OS grid reference) · View on Apple Maps WFD catchment Brampton Branch - Lower (GB105032045390) 2024 spills / hours 22 / 51 Long-term average 18.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Culverted Trib of River Nene	7	14	down 68%	100%
Letchworth-Norton Common CSO Overflow on sewer network Company site name LETCHWORTH-NORTON COMMON SSO EA ID / permit AWS00734 · AW1NF805 Outlet location TL2145033280 (OS grid reference) · View on Apple Maps WFD catchment Pix Brook (GB105033037730) 2024 spills / hours 15 / 46 Long-term average 10.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	The Pix Brook	8	14	down 47%	98%
Hadleigh Storm discharge at pumping station Company site name HADLEIGH STW EA ID / permit AWS00544 · AW2NFE07884 Outlet location TM0295041530 (OS grid reference) · View on Apple Maps WFD catchment Brett (GB105036040930) 2024 spills / hours 9 / 80 Long-term average 5.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	River Brett	2	14	down 78%	100%
Rushden - Duck Street CSO Overflow on sewer network Company site name Rushden - Duck Street Combined Sewer Overflow EA ID / permit AWS01079 · AW5NF672 Outlet location SP9553067140 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Ise to Islip (GB105032050383) 2024 spills / hours 27 / 129 Long-term average 50.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 14 hours spilling →	Wash Brook	10	14	down 63%	99%
Skendleby STW Inlet overflow at sewage works Sewage works Skendleby Company site name Skendleby STW EA ID / permit AWS01141 · AW3NFF1292 Outlet location TF4324069820 (OS grid reference) · View on Apple Maps WFD catchment Lymn / Steeping (GB105030062430) 2024 spills / hours 8 / 19 Long-term average 7.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Trib of River Lymn	6	14	down 25%	100%
Diss Water Recycling Centre Storm tank at sewage works Sewage works Diss Company site name DISS STW EA ID / permit AWS00339 · AW4NF625 Outlet location TM1205079340 (OS grid reference) · View on Apple Maps WFD catchment Waveney (u/s Frenze Beck) (GB105034045820) 2024 spills / hours 21 / 51 Long-term average 28.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	The River Waveney Nt	8	14	down 62%	97%
Holton Tetney Lane TPS Storm discharge at pumping station Company site name HOLTON-TETNEY LA TPS EA ID / permit AWS00614 · AW3NF443 Outlet location TA2902002810 (OS grid reference) · View on Apple Maps WFD catchment Waithe Beck lower catchment (to Tetney Lock) (GB104029062100) 2024 spills / hours 13 / 14 Long-term average 4.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Humberston Beck	2	14	down 85%	100%
Hullbridge-Ferry Road 2 CSO Overflow on sewer network Company site name HULLBRIDGE-FERRY RD 2 PS EA ID / permit AWS00624 · AW2NFE15768 Outlet location TQ8079094130 (OS grid reference) · View on Apple Maps WFD catchment CROUCH (GB520503704100) 2024 spills / hours 0 / 0.0 Long-term average 4.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 14 hours spilling →	Triburaty of the River Crouch	13	14	up from 0	98%
Elmsett Water Recycling Centre Inlet overflow at sewage works (with treatment) Sewage works Elmsett Company site name ELMSETT STW EA ID / permit AWS00400 · AW4NF300X Outlet location TM0720045900 (OS grid reference) · View on Apple Maps WFD catchment Belstead Brook (GB105035040440) Treatment Reed bed 2024 spills / hours 19 / 89 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 13 hours spilling →	Tributray Belstead Brook Nt	7	13	down 63%	100%
Harleston STW Inlet overflow at sewage works Sewage works Harleston EA ID / permit AWS00561 · AW4NF/533 Outlet location TM2501084020 (OS grid reference) · View on Apple Maps WFD catchment Starston Brook (GB105034045880) 2024 spills / hours 12 / 10 Long-term average 14.0 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Starston Beck River Waveney N	12	13	no change	100%
Hatley St. George Storm tank at sewage works Sewage works Hatley St George Company site name HATLEY ST GEORGE STW EA ID / permit AWS00572 · ASCNF10308 Outlet location TL2795051400 (OS grid reference) · View on Apple Maps WFD catchment Millbridge and Potton Brooks (GB105033037820) 2024 spills / hours 20 / 313 Long-term average 9.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Millbridge Brook	2	13	down 90%	100%
Shutlanger Overflow on sewer network Company site name SHUTLANGER SO-FIELD 76 SSO EA ID / permit AWS01129 · AW1NF246 Outlet location SP7282049720 (OS grid reference) · View on Apple Maps WFD catchment Shutlanger Brook (GB105033038270) 2024 spills / hours 14 / 83 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 13 hours spilling →	Shutlanger Brook	13	13	down 7%	100%
Bengal Lane Overflow on sewer network Company site name GREENS NORTON-BENGAL MANOR SSO EA ID / permit AWS00080 · AWCNF10017 Outlet location SP6704049180 (OS grid reference) · View on Apple Maps WFD catchment Tove (DS Greens Norton) (GB105033038180) 2024 spills / hours 6 / 20 Long-term average 4.7 spills a year (monitored since 2023) Monitor below 90% Installation set-up/design issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	unnamed trib of River Tove	3	13	down 50%	88%
Brook Vale SSO Overflow on sewer network Company site name WELLINGBOROUGH-BROOK VALE SSO EA ID / permit AWS00159 · AWNNF10524 Outlet location SP8745066530 (OS grid reference) · View on Apple Maps WFD catchment Swanspool Brook (GB105032045070) 2024 spills / hours 32 / 229 Long-term average 18.5 spills a year (monitored since 2024) Monitor below 90% Installation set-up/design issue · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Stanwell Brook	5	13	down 84%	58%
Papworth Everard STW Storm tank at sewage works Sewage works Papworth Everard EA ID / permit AWS00971 · AW1NF1003 Outlet location TL2806063560 (OS grid reference) · View on Apple Maps WFD catchment West Brook (GB105033042730) 2024 spills / hours 50 / 135 Long-term average 20.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Tributary of West Brook	7	13	down 86%	100%
Church End Lane SO Overflow on sewer network Company site name RUNWELL-CHURCH END LA OVERFLOW EA ID / permit AWS00229 · ASENF/3150/12106 Outlet location TQ7475094720 (OS grid reference) · View on Apple Maps WFD catchment Crouch (d/s Wickford) (GB105037028550) 2024 spills / hours 2 / 2.3 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 13 hours spilling →	tributary River Crouch	4	13	up 100%	94%
Louth-Broadbank CSO Overflow on sewer network Company site name LOUTH-BROADBANK SSO EA ID / permit AWS00774 · ANNNF13585 Outlet location TF3277087610 (OS grid reference) · View on Apple Maps WFD catchment Louth Canal (GB104029061990) 2024 spills / hours 64 / 602 Long-term average 37.7 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	River Lud	12	13	down 81%	78%
Abington Tank CSO Overflow on sewer network Company site name Abington Tank CSO EA ID / permit AWS00008 · AWNNF13522 Outlet location SP7925060620 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Brampton Branch to conf Ise (GB105032045050) 2024 spills / hours 19 / 101 Long-term average 8.9 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	The River Nene Navigation	5	13	down 74%	100%
Keelby STW Storm tank at sewage works Sewage works Keelby EA ID / permit AWS00667 · ANNNF13405 Outlet location TA1691009860 (OS grid reference) · View on Apple Maps WFD catchment North Beck Drain (GB104029067575) 2024 spills / hours 57 / 123 Long-term average 37.3 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Caddle Beck	9	13	down 84%	100%
Brigg - Sunningdale Ave Terminal PS Storm discharge at pumping station Company site name BRIGG-SUNNINGDALE AV TPS EA ID / permit AWS00138 · ANNNF13486 Outlet location TA0013008200 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Bishopbridge to the Humber (GB104029067520) 2024 spills / hours 4 / 6.0 Long-term average 5.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Wrawby Catchment Drain	9	13	up 125%	100%
Sutton Bridge STW Inlet overflow at sewage works Sewage works Sutton Bridge EA ID / permit AWS01337 · AW5TS742 Outlet location TF4883023250 (OS grid reference) · View on Apple Maps WFD catchment NENE (GB530503200200) 2024 spills / hours 40 / 142 Long-term average 24.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing Volume & pollution Estimate from 13 hours spilling →	River Nene	8	13	down 80%	100%
Leiston - Waterloo Avenue/Park Hill Overflow on sewer network Company site name Leiston - Waterloo Avenue/Park Hill CSO EA ID / permit AWS00730 · EPRNB3696NC Outlet location TM4523063300 (OS grid reference) · View on Apple Maps WFD catchment Leiston Beck (GB105035046271) 2024 spills / hours 22 / 13 Long-term average 25.0 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Leiston Beck	15	13	down 32%	83%
Wisbech(West Walton)STW Storm tank at sewage works Sewage works Wisbech Company site name WEST WALTON STW EA ID / permit AWS01517 · AENTS13068 Outlet location TF4578814311 (OS grid reference) · View on Apple Maps WFD catchment NENE (GB530503200200) 2024 spills / hours 30 / 144 Long-term average 26.7 spills a year (monitored since 2023) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	tidal River Nene	3	13	down 90%	100%
Colchester-Bourne Mill CSO Overflow on sewer network Company site name COLCHESTER-BOURNE MILL OV EA ID / permit AWS00260 · ASENF1720 Outlet location TM0059023830 (OS grid reference) · View on Apple Maps WFD catchment COLNE (GB520503713800) 2024 spills / hours 21 / 16 Long-term average 9.0 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 13 hours spilling →	The Bourne Brook	21	13	no change	100%
East St Coggeshall Overflow on sewer network Company site name COGGESHALL-EAST ST SO EA ID / permit AWS00384 · AW2NFC174 Outlet location TL8545022630 (OS grid reference) · View on Apple Maps WFD catchment Blackwater (Combined Essex) (GB105037041160) 2024 spills / hours 21 / 189 Long-term average 12.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 13 hours spilling →	Trib of the River Blackwater	4	13	down 81%	98%
Glentham - Caenby Road Sp Storm discharge at pumping station Company site name CSO and EO at Glentham - Caenby Road SP EA ID / permit AWS00470 · ANNNF2181 Outlet location TF0015089880 (OS grid reference) · View on Apple Maps WFD catchment Ancholme from Source to Bishopbridge (GB104029061850) 2024 spills / hours 1 / 0.5 Long-term average 1.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	Unnamed Dyke to Seggimoor Beck	2	12	up 100%	100%
Hatfield Peverel Crabbs Hill PS Storm discharge at pumping station Company site name Hatfield Peverel Crabbs Hill Terminal Pumping Station EA ID / permit AWS00571 · ASENF12034 Outlet location TL7849010750 (OS grid reference) · View on Apple Maps WFD catchment Ter (GB105037033940) 2024 spills / hours 9 / 7.3 Long-term average 4.0 spills a year (monitored since 2020) Monitor below 90% Power failure / issue · Resolved - Mar Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	River Ter	3	12	down 67%	83%
Thurleigh PS CSO and EO Storm discharge at pumping station Company site name THURLEIGH-CHURCH END SP EA ID / permit AWS01378 · AWCNF2676 Outlet location TL0506058510 (OS grid reference) · View on Apple Maps WFD catchment Renhold Brook (GB105033043210) 2024 spills / hours 10 / 28 Long-term average 4.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	Ravensden Brook - R.Great Ouse	2	12	down 80%	98%
Clacton (Holland Haven) WRC Storm discharge at pumping station Company site name Clacton (Holland Haven) Water Recycling Centre EA ID / permit AWS00235 · AEECS12401 Outlet location TM2226016500 (OS grid reference) · View on Apple Maps WFD catchment Essex (GB650503520001) Bathing water Holland 2024 spills / hours 22 / 30 Long-term average 13.0 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 12 hours spilling →	North Sea	8	12	down 64%	100%
Peterborough-Orton Mere PS Storm discharge at pumping station Company site name Peterborough-Orton Mere Pumping Station EA ID / permit AWS00990 · AW5NF567 Outlet location TL1656097170 (OS grid reference) · View on Apple Maps WFD catchment Nene - Islip to tidal (GB105032050381) 2024 spills / hours 5 / 33 Long-term average 2.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	Trib River Nene	1	12	down 80%	100%
Colchester-Haven Road CSO Overflow on sewer network Company site name COLCHESTER-HAVEN RD OV EA ID / permit AWS00263 · ASETS19243 Outlet location TM0213023840 (OS grid reference) · View on Apple Maps WFD catchment COLNE (GB520503713800) 2024 spills / hours 18 / 31 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 Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 12 hours spilling →	Tidal River Colne	6	12	down 67%	100%
Bugbrooke SSO Ace Lane Overflow on sewer network Company site name BUGBROOKE-ACE LANE SSO EA ID / permit AWS00171 · AW5NF2150 Outlet location SP6749057240 (OS grid reference) · View on Apple Maps WFD catchment Bugbrooke (GB105032045280) 2024 spills / hours 18 / 61 Long-term average 11.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	Bugbrooke Brook	4	12	down 78%	97%
Southery (Mill Dr) STW Storm tank at sewage works Sewage works Southery Company site name SOUTHERY-MILL DROVE STW EA ID / permit AWS01196 · AECNF10270 Outlet location TL6204093990 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 46 / 517 Long-term average 23.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	White Bridge Drain River Great	3	12	down 93%	100%
Stotfold - Brook End PS Storm discharge at pumping station Company site name STOTFOLD-BROOK END SP EA ID / permit AWS01318 · AWCNF10216 Outlet location TL2126036620 (OS grid reference) · View on Apple Maps WFD catchment Pix Brook (GB105033037730) 2024 spills / hours 11 / 58 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 12 hours spilling →	Trib of Tingewick Brook	3	12	down 73%	100%
Ivy Lodge SPS Storm discharge at pumping station Company site name GT HORKESLEY-IVY LODGE R SP EA ID / permit AWS00661 · AW2NFE08884 Outlet location TL9830029600 (OS grid reference) · View on Apple Maps WFD catchment Colne (d/s Doe's Corner) (GB105037041330) 2024 spills / hours 6 / 32 Long-term average 4.0 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 12 hours spilling →	Horkesley Black Brook	2	12	down 67%	100%
Collyweston STW Storm tank at sewage works (with treatment) Sewage works Collyweston EA ID / permit AWS00268 · AW5NF624 Outlet location SK9902003320 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) Treatment Reed bed 2024 spills / hours 47 / 723 Long-term average 12.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	River Welland Nt	2	12	down 96%	100%
Holland Road/Second Avenue Overflow on sewer network Company site name Frinton-on-Sea Holland Road & Second Avenue Combined Sewer Overflow EA ID / permit AWS00609 · ASENF12192 Outlet location TM2321019340 (OS grid reference) · View on Apple Maps WFD catchment Holland Brook (GB105037077810) Bathing water Frinton 2024 spills / hours 5 / 15 Long-term average 8.4 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	Kirby Brook	8	12	up 60%	100%
Desborough - Hilltop Avenue CSO Overflow on sewer network Company site name Desborough-Hilltop Avenue Combined Sewer Overflow EA ID / permit AWS00330 · AWNNF13660 Outlet location SP8017082890 (OS grid reference) · View on Apple Maps WFD catchment Ise - Upper (GB105032045200) 2024 spills / hours 14 / 30 Long-term average 8.8 spills a year (monitored since 2020) Monitor below 90% Installation set-up/design issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 12 hours spilling →	A Tributary of the River Ise	13	12	down 7%	60%

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.