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
Hawstead Green Pumping Station Storm discharge at pumping station Company site name HAWSTEAD-HAWSTEAD GRN SP EA ID / permit AWS00579 · ASENF11506 Outlet location TL8607058690 (OS grid reference) · View on Apple Maps WFD catchment Lark (US Hawstead) (GB105033042920) 2024 spills / hours 32 / 404 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 36 hours spilling →	Stanningf'D Trib of R Lark	6	36	down 81%	100%
Pleshey - Ford End Pumping Station Storm discharge at pumping station Company site name PLESHEY-FORD END SP EA ID / permit AWS00996 · ASENF2311 Outlet location TL6744017120 (OS grid reference) · View on Apple Maps WFD catchment Chelmer (Gt. Easton - R. Can) (GB105037033950) 2024 spills / hours 33 / 447 Long-term average 11.6 spills a year (monitored since 2021) Monitor below 90% Sensor failure / issue · Resolved - Feb 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 36 hours spilling →	Trib R Chelmer	8	36	down 76%	88%
Weedon Pumping Station Storm discharge at pumping station Company site name WEEDON BEC WEST STREET SSO EA ID / permit AWS01449 · EPR/UB3091NY Outlet location SP6260059400 (OS grid reference) · View on Apple Maps WFD catchment Nene - headwaters to conf Whilton Branch (GB105032045310) 2024 spills / hours 14 / 27 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 36 hours spilling →	River Nene	16	36	up 14%	100%
Combined Sewage Overflow Overflow on sewer network Company site name KETTERING - X MARGARET ROAD CSO EA ID / permit AWS00270 · AWNNF13854 Outlet location SP8828079110 (OS grid reference) · View on Apple Maps WFD catchment Ise - Upper (GB105032045200) 2024 spills / hours 19 / 29 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 36 hours spilling →	The River Ise	10	36	down 47%	91%
Portmans Walk Tank Pumping Station Storm discharge at pumping station Company site name Portman's Walk Pumping Station EA ID / permit AWS01004 · ASETS12153 Outlet location TM1547044070 (OS grid reference) · View on Apple Maps WFD catchment Gipping (d/s Stowmarket) (GB105035046280) 2024 spills / hours 22 / 58 Long-term average 11.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	The Orwell Estuary	20	36	down 9%	97%
Denford PS Storm discharge at pumping station Company site name DENFORD SP EA ID / permit AWS00325 · AW5NF1572 Outlet location SP9937076840 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Ise to Islip (GB105032050383) 2024 spills / hours 39 / 302 Long-term average 15.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 36 hours spilling →	River Nene	5	36	down 87%	100%
Norwich Sandy Lane CSO Overflow on sewer network Company site name Norwich Sandy Lane Combined Sewer Overflow EA ID / permit AWS00944 · EPREB3296WM Outlet location TG2336505901 (OS grid reference) · View on Apple Maps WFD catchment Yare (Tiffey to Wensum) (GB105034051281) 2024 spills / hours 109 / 222 Long-term average 104.7 spills a year (monitored since 2018) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	The River Yare	24	36	down 78%	68%
Caister- Headworks PS Storm discharge at pumping station Company site name CAISTER-HEADWORKS PS EA ID / permit AWS00187 · AEENF12406 Outlet location TG5178011010 (OS grid reference) · View on Apple Maps WFD catchment Norfolk East (GB650503520003) 2024 spills / hours 10 / 14 Long-term average 10.7 spills a year (monitored since 2020) Monitor below 90% Power failure / issue · Resolved - Mar 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 36 hours spilling →	Ditch to Marsh Drain System	19	36	up 90%	77%
Preston STW Storm tank at sewage works Sewage works Preston EA ID / permit AWS01011 · AWNNF13319 Outlet location SK8684003070 (OS grid reference) · View on Apple Maps WFD catchment Chater - Upper (GB105031050430) 2024 spills / hours 14 / 22 Long-term average 19.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	Preston Brook River Chater	25	36	up 79%	99%
Long Buckby CSO Overflow on sewer network Company site name LONG BUCKBY MH2200 EA ID / permit AWS00766 · AWNNF13930 Outlet location SP6318067060 (OS grid reference) · View on Apple Maps WFD catchment Tributary of Whilton Branch (GB105032045400) 2024 spills / hours 41 / 256 Long-term average 30.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	Trib of River Nene	19	36	down 54%	100%
Upminster (Bury Fm) STW Storm tank at sewage works Sewage works Upminster Company site name UPMINSTER STW EA ID / permit AWS01417 · ASENF10497 Outlet location TQ6083086720 (OS grid reference) · View on Apple Maps WFD catchment Mardyke (West Tributary) (GB106037028080) 2024 spills / hours 34 / 309 Long-term average 20.3 spills a year (monitored since 2022) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Mar Dyke West	5	35	down 85%	100%
Little Wratting PS Storm discharge at pumping station Company site name LITTLE WRATTING SPS EA ID / permit AWS00754 · AW2NFE02280 Outlet location TL6819046930 (OS grid reference) · View on Apple Maps WFD catchment Stour Brook (GB105036040950) 2024 spills / hours 17 / 219 Long-term average 13.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Trib Stour Brook	3	35	down 82%	100%
Corton Bakers Score Pumping Station Storm discharge at pumping station Company site name Corton-Bakers Score Pumping Station EA ID / permit AWS00280 · ASETS2120 Outlet location TM5443097860 (OS grid reference) · View on Apple Maps WFD catchment Norfolk East (GB650503520003) 2024 spills / hours 32 / 60 Long-term average 26.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 35 hours spilling →	The North Sea	20	35	down 38%	100%
Stamford-Hudds Mill TPS Storm discharge at pumping station EA ID / permit AWS01273 · AW5NF1780 Outlet location TF0420007400 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 22 / 408 Long-term average 9.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 35 hours spilling →	River Welland	3	35	down 86%	96%
Sudbury - Great Eastern Road TPS Storm discharge at pumping station Company site name Sudbury Great Eastern Road Terminal Pumping Station EA ID / permit AWS01331 · ASENF/3753/12422 Outlet location TL8752040910 (OS grid reference) · View on Apple Maps WFD catchment Stour (Wixoe - Lamarsh) (GB105036040941) Bathing water Friars Meadow, River Stour 2024 spills / hours 29 / 70 Long-term average 19.7 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 35 hours spilling →	River Stour	20	35	down 31%	100%
Main St PS Little Thetford Storm discharge at pumping station Company site name LT THETFORD-MAIN ST TPS EA ID / permit AWS00799 · AECNF11041 Outlet location TL5332076110 (OS grid reference) · View on Apple Maps WFD catchment Ely Ouse (South Level) (GB205033000070) 2024 spills / hours 20 / 259 Long-term average 10.3 spills a year (monitored since 2022) Monitor below 90% Power failure / issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Thetford Catchwater	4	35	down 80%	79%
Bourne STW Inlet overflow at sewage works Sewage works Bourne Company site name Bourne STW_A3 EA ID / permit AWS00108 · ANNNF1573 Outlet location TF1097320004 (OS grid reference) · View on Apple Maps WFD catchment Black Sluice IDB draining to the South Forty Foot Drain (GB205030051515) 2024 spills / hours 21 / 117 Long-term average 16.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement UWWTR improvement ongoing Volume & pollution Estimate from 34 hours spilling →	Bourne Eau + Black Sluice Dyke	12	34	down 43%	100%
Westbury STW Storm tank at sewage works Sewage works Westbury EA ID / permit AWS01478 · AW1NF578 Outlet location SP6229035200 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Brackley to Buckingham) (GB105033037860) 2024 spills / hours 28 / 70 Long-term average 19.5 spills a year (monitored since 2022) Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	River Great Ouse Nt	25	34	down 11%	63%
Pytchley Rd Ind Est SSO Overflow on sewer network Company site name KETTERING-PYTCHLEY LODGE SSO EA ID / permit AWS01018 · AW5NF2118 Outlet location SP8719076480 (OS grid reference) · View on Apple Maps WFD catchment Slade Brook (GB105032045170) 2024 spills / hours 40 / 101 Long-term average 30.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	East Brook	21	34	down 48%	99%
Frinton Upper 2ND Av/the Close CSO Overflow on sewer network Company site name Frinton Upper Second Avenue - The Close Combined Sewer Overflow EA ID / permit AWS00454 · ASENF12381 Outlet location TM2303019860 (OS grid reference) · View on Apple Maps WFD catchment Holland Brook (GB105037077810) Bathing water Frinton 2024 spills / hours 48 / 58 Long-term average 47.1 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	Kirby Brook	17	34	down 65%	100%
Polebrook TPS Storm discharge at pumping station EA ID / permit AWS01001 · AWNNF2534 Outlet location TL0670087000 (OS grid reference) · View on Apple Maps WFD catchment Nene - Islip to tidal (GB105032050381) 2024 spills / hours 39 / 462 Long-term average 23.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	Polebrook Brook	8	34	down 79%	100%
Rothersthorpe PS Storm discharge at pumping station Company site name ROTHERSTHORPE SP EA ID / permit AWS01063 · AW5NF113 Outlet location SP7173056770 (OS grid reference) · View on Apple Maps WFD catchment Wootton Brook (GB105032045550) 2024 spills / hours 45 / 411 Long-term average 31.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Trib of Wotton Brook	10	33	down 78%	100%
Tinwell SPS Storm discharge at pumping station Company site name CSO and EO at Tinwell SP EA ID / permit AWS01387 · AW5NF402 Outlet location TF0088006270 (OS grid reference) · View on Apple Maps WFD catchment Welland - conf Langton Bk to conf Gwash (GB105031050580) 2024 spills / hours 35 / 469 Long-term average 21.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Brain	7	33	down 80%	100%
Court Est. PS Storm discharge at pumping station Company site name RUSHDEN-COURT ESTATE SP EA ID / permit AWS00285 · AWCNF2238 Outlet location SP9850065000 (OS grid reference) · View on Apple Maps WFD catchment Kym (and Til) (GB105033042980) 2024 spills / hours 29 / 238 Long-term average 17.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	River Til	7	33	down 76%	100%
Canvey - Nevada Rd/High St PS Storm discharge at pumping station Company site name CANVEY-HIGH ST SP EA ID / permit AWS00195 · AW2NFE12084 Outlet location TQ7988083730 (OS grid reference) · View on Apple Maps WFD catchment THAMES LOWER (GB530603911401) 2024 spills / hours 6 / 53 Long-term average 9.6 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 33 hours spilling →	Knightswick Dyke	6	33	no change	100%
Waterbeach (Old) WRC Storm tank at sewage works Sewage works Waterbeach Company site name WATERBEACH STW EA ID / permit AWS01445 · ASCNF/10357 Outlet location TL5042066430 (OS grid reference) · View on Apple Maps WFD catchment Old West River (GB205033043375) 2024 spills / hours 23 / 374 Long-term average 10.4 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Bannold Drove Ditch	3	33	down 87%	100%
Pastures Drive CSO Overflow on sewer network Company site name LOUTH-PASTURES DRIVE CSO EA ID / permit AWS00974 · ANNNF1764 Outlet location TF3392086540 (OS grid reference) · View on Apple Maps WFD catchment South Dike and Grayfleet Drain (GB105029061680) 2024 spills / hours 8 / 23 Long-term average 13.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Stewton Beck	18	32	up 125%	100%
St Osyth Point Clear Road CSO Overflow on sewer network Company site name St Osyth Point Clear Road Combined Sewer Overflow EA ID / permit AWS01260 · AW2NFE01182 Outlet location TM1059015040 (OS grid reference) · View on Apple Maps WFD catchment St Osyth Drain (GB105037034170) Shellfish water Colne 2024 spills / hours 16 / 78 Long-term average 26.1 spills a year (monitored since 2019) Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 32 hours spilling →	Trib St. Osyth Creek	6	32	down 63%	99%
Lavenham Water Recycling Centre Storm tank at sewage works Sewage works Lavenham Company site name LAVENHAM STW EA ID / permit AWS00713 · ASENF1118 Outlet location TL9237048590 (OS grid reference) · View on Apple Maps WFD catchment Lavenham Brook (GB105036040770) 2024 spills / hours 19 / 245 Long-term average 20.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Lavenham Brook River Brett Nt	9	32	down 53%	100%
St Ives Priory Road Pumping Station Storm discharge at pumping station Company site name St Ives Priory Road Pumping Station EA ID / permit AWS01253 · AWCNF2542 Outlet location TL3148071010 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Roxton to Earith) (GB105033047921) 2024 spills / hours 46 / 346 Long-term average 32.7 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	River Great Ouse	18	32	down 61%	100%
Occold Storm discharge at pumping station Company site name OCCOLD-TPS EA ID / permit AWS00949 · ASENF2514 Outlet location TM1510071400 (OS grid reference) · View on Apple Maps WFD catchment Dove (GB105034045710) 2024 spills / hours 0 / 0.0 Long-term average 6.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Trib R Dove	13	32	up from 0	100%
Milton Ferry PS Storm discharge at pumping station Company site name MILTON FERRY SP EA ID / permit AWS00849 · AWNNF2808 Outlet location TL1440098500 (OS grid reference) · View on Apple Maps WFD catchment Nene - Islip to tidal (GB105032050381) 2024 spills / hours 31 / 317 Long-term average 19.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 31 hours spilling →	R Nene	7	31	down 77%	100%
Great Cransley TPS Storm discharge at pumping station Company site name CRANSLEY (EXSTW) PS EA ID / permit AWS00492 · AWNNF13598 Outlet location SP8348076720 (OS grid reference) · View on Apple Maps WFD catchment Loddington Arm (Ise) (GB105032045150) 2024 spills / hours 27 / 481 Long-term average 12.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Slade Brook	4	31	down 85%	100%
Southend - Belton Gardens PS Storm discharge at pumping station Company site name SOUTHEND-SHOEBURY NESS RD SP EA ID / permit AWS01186 · S/WR90 Outlet location TQ9249084000 (OS grid reference) · View on Apple Maps WFD catchment THAMES LOWER (GB530603911401) Bathing water Shoeburyness 2024 spills / hours 84 / 65 Long-term average 76.5 spills a year (monitored since 2024) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Thames Estuary	69	31	down 18%	100%
Storeys PS Burghlemarsh Storm discharge at pumping station Company site name BURGH LE MARSH-STOREYS LAN TPS EA ID / permit AWS01315 · ANNNF10149 Outlet location TF5048064910 (OS grid reference) · View on Apple Maps WFD catchment Cow Bank Drain (GB105030056440) 2024 spills / hours 11 / 57 Long-term average 7.8 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Catchwater Drain	4	31	down 64%	100%
Ulceby Skitter Pumping Station Storm discharge at pumping station Company site name ULCEBY SKITTER SP EA ID / permit AWS01413 · AWNNF13431 Outlet location TA1234014930 (OS grid reference) · View on Apple Maps WFD catchment Skitter Beck / East Halton Beck (GB104029067655) 2024 spills / hours 19 / 133 Long-term average 13.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 31 hours spilling →	Skitter Beck	3	31	down 84%	100%
Stony Stratford Overflow on sewer network Company site name Stony Stratford SSO EA ID / permit AWS01313 · AW1NF1091 Outlet location SP7830040400 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Buckingham to Cosgrove) (GB105033037920) 2024 spills / hours 72 / 498 Long-term average 39.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	River Ouse	6	31	down 92%	100%
Braunston WRC Inlet overflow at sewage works Sewage works Braunston Company site name BRAUNSTON STW EA ID / permit AWS00131 · AW5NF694 Outlet location SK8385306428 (OS grid reference) · View on Apple Maps WFD catchment South Gwash (GB105031050480) 2024 spills / hours 44 / 160 Long-term average 29.2 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 31 hours spilling →	River Gwash	31	31	down 30%	100%
Toddington TPS Storm discharge at pumping station Company site name CSO and EO at Toddington TPS EA ID / permit AWS01391 · AWCNF2679 Outlet location TL0252028420 (OS grid reference) · View on Apple Maps WFD catchment Flit (GB105033037640) 2024 spills / hours 32 / 242 Long-term average 21.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Trib to River Flit	11	31	down 66%	100%
SSO Lower End Overflow on sewer network Company site name GRENDON-LOWER END SSO EA ID / permit AWS01246 · AW5NF1802 Outlet location SP8824061080 (OS grid reference) · View on Apple Maps WFD catchment Grendon Brook (GB105032045330) 2024 spills / hours 11 / 22 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 31 hours spilling →	Grendon Brook	27	31	up 145%	100%
Louth-Grays Road CSO Overflow on sewer network Company site name LOUTH-GRAYS ROAD SSO EA ID / permit AWS00776 · ANNNF13583 Outlet location TF3272087580 (OS grid reference) · View on Apple Maps WFD catchment Louth Canal (GB104029061990) 2024 spills / hours 56 / 127 Long-term average 36.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	River Lud	16	30	down 71%	100%
Southend - Belton Gardens PS Overflow on sewer network Company site name Southend - Manilla Road EA ID / permit AWS01179 · S/WR87 Outlet location TQ8970084740 (OS grid reference) · View on Apple Maps WFD catchment THAMES LOWER (GB530603911401) Bathing water Southend Jubilee Shellfish water Foulness 2024 spills / hours 5 / 16 Long-term average 10.4 spills a year (monitored since 2019) Monitor below 90% Installation set-up/design issue · Resolved - Sep Investigation Bathing Water and/or Shellfish Water investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	Thames Estuary	5	30	no change	83%
Hartford Road CSO Overflow on sewer network Company site name Hartford Road Combined Sewer Overflow EA ID / permit AWS00564 · AWCNF11842 Outlet location TL2450071790 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Roxton to Earith) (GB105033047921) 2024 spills / hours 66 / 170 Long-term average 44.0 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing, UWWTR improvement ongoing Volume & pollution Estimate from 30 hours spilling →	River Great Ouse	27	30	down 59%	100%
Horncastle-Thornton Lane TPS Storm discharge at pumping station Company site name HORNCASTLE-THORNTON LA TPS EA ID / permit AWS00618 · AW3NF863 Outlet location TF2606068120 (OS grid reference) · View on Apple Maps WFD catchment Bain - Lower (GB105030062450) 2024 spills / hours 18 / 97 Long-term average 15.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	Old River Bain	4	30	down 78%	100%
Culford the Street Sp Storm discharge at pumping station Company site name Culford The Street SP EA ID / permit AWS00314 · ASCNF2666 Outlet location TL8375069910 (OS grid reference) · View on Apple Maps WFD catchment Culford Stream (GB105033043030) 2024 spills / hours 32 / 354 Long-term average 17.8 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement Env Act (SODRP) improvement ongoing Volume & pollution Estimate from 30 hours spilling →	Tributary of the River Lark	7	30	down 78%	100%
Water Lane CSO, Sherington Overflow on sewer network Company site name SHERINGTON-WATER LANE SSO EA ID / permit AWS01443 · AWCNF11337 Outlet location SP8847046210 (OS grid reference) · View on Apple Maps WFD catchment Ouse (Newport Pagnell to Roxton) (GB105033047923) 2024 spills / hours 2 / 8.0 Long-term average 8.5 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	tributary River Great Ouse	15	30	up 650%	92%
Heath Road PS Storm discharge at pumping station Company site name RAMSDEN HEATH-HEATH RD SP EA ID / permit AWS00581 · ASCNF2369 Outlet location TQ7160096100 (OS grid reference) · View on Apple Maps WFD catchment Sandon Brook (West arm) (GB105037028630) 2024 spills / hours 33 / 283 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 30 hours spilling →	Trib Sandon Brook	2	30	down 94%	100%
Silsoe High Street CSO Overflow on sewer network Company site name SILSOE-HIGH STREET CSO EA ID / permit AWS01135 · AW1NF284 Outlet location TL0809036390 (OS grid reference) · View on Apple Maps WFD catchment Flit and Ivel Navigation d/s of Shefford (GB105033037790) 2024 spills / hours 41 / 228 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 30 hours spilling →	Ditch Trib of the River Flit	11	30	down 73%	100%
Woodford Church SSO Overflow on sewer network Company site name WOODFORD-CHURCH FIELD SSO EA ID / permit AWS01539 · AWNNF837/13008 Outlet location SP9705076670 (OS grid reference) · View on Apple Maps WFD catchment Nene - conf Ise to Islip (GB105032050383) 2024 spills / hours – / – 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 30 hours spilling →	River Nene	7	30		94%
Wittering STW Storm tank at sewage works Sewage works Wittering EA ID / permit AWS01525 · AW5NF336 Outlet location TF0546001280 (OS grid reference) · View on Apple Maps WFD catchment Wittering Brook (GB105032050350) 2024 spills / hours 6 / 24 Long-term average 5.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 29 hours spilling →	Wittering Brook	4	29	down 33%	100%

Sewage treatment works

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

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