Storm overflow register · 2025 annual return

Northumbrian Water storm overflows, 2025

Northumbrian Water reported 1,561 storm overflows in England for 2025. Together they recorded 27,860 spills over 123,803 hours, an average of 17.8 spills per overflow against 20.4 across England. That ranks 5 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 32% on 2024.

255 overflows did not spill · 69 spilled more than 60 times · 1,359 had monitors working for 90% of the year or more · 183 sewage treatment works with overflows

Hours spilling by month, 2025

Hours spilling, all Northumbrian Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Northumbrian 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
The New Road CSO Overflow on sewer network EA ID / permit NWL00937 · 25/04/1711 Outlet location NZ4614421421 (OS grid reference) · View on Apple Maps WFD catchment MILL RACE (GB510302509900) 2024 spills / hours 1 / 0.3 Long-term average 1.2 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Mill Race	0	0.0	down 100%	86%
Newburn Industrial Estate SPS Storm discharge at pumping station EA ID / permit NWL00945 · 235/1732 Outlet location NZ1716164838 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	River Tyne Saline Estuary	0	0.0	no change	100%
Newholme C.S.O. Overflow on sewer network EA ID / permit NWL00950 · 25/02/1103 Outlet location NZ1432016920 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 0 / 0.0 Long-term average 0.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Unnamed Trib of Tees	0	0.0	no change	97%
Newton Street CSO Overflow on sewer network EA ID / permit NWL00953 · 235/1367 Outlet location NZ2294162719 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2019) Investigation Operational investigation ongoing Improvement No improvement action in reporting period	Tyne	0	0.0	no change	100%
North Cambois Pumping Station Storm discharge at pumping station EA ID / permit NWL00959 · 226/1155 Outlet location NZ3091184259 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 37 / 723 Long-term average 9.6 spills a year (monitored since 2021) Monitor below 90% Comms failure / issue · Resolved - Sep Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	0	0.0	down 100%	89%
North Parade High Level CSO (A52) Overflow on sewer network EA ID / permit NWL00963 · 235/1795 Outlet location NZ3575072427 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Whitley Bay 2024 spills / hours 0 / 0.0 Long-term average 2.6 spills a year (monitored since 2019) Monitor below 90% Sensor failure / issue · Resolved - Jun Investigation Operational investigation completed Improvement Operational improvement ongoing	North Sea	0	0.0	no change	68%
North Point CSO (NTY049) Overflow on sewer network EA ID / permit NWL00964 · 235/1987 Outlet location NZ3655470986 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Tynemouth Cullercoats 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement ongoing	North Sea	0	0.0	no change	100%
Oak Road CSO Overflow on sewer network EA ID / permit NWL00970 · 256/1064 Outlet location NZ6176024160 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Redcar Stray 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2014) Monitor below 90% Installation set-up/design issue · Resolved - Jun Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	0	0.0	no change	84%
Outlet Lane CSO No.2 Overflow on sewer network EA ID / permit NWL00992 · 233/1050 Outlet location NY9412064400 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2016) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	River Tyne Tributary	0	0.0	no change	100%
Park Road CSO WV41 Overflow on sewer network EA ID / permit NWL01012 · 241/1034 Outlet location NZ1715129940 (OS grid reference) · View on Apple Maps WFD catchment Wear from Houselop Beck to Beechburn Beck (GB103024077462) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2019) Investigation Operational investigation ongoing Improvement Operational improvement ongoing	River Wear Tributary	0	0.0	no change	98%
Parkgate Farm CSO Overflow on sewer network EA ID / permit NWL01014 · 234/1131 Outlet location NZ1822861510 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 0 / 0.0 Long-term average 1.8 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Derwent Trib	0	0.0	no change	100%
Pegswood Csocounty First School Overflow on sewer network EA ID / permit NWL01018 · EPRCB3192AA Outlet location NZ2266587950 (OS grid reference) · View on Apple Maps WFD catchment Bothal Burn Catchment (trib of Wansbeck) (GB103022077030) 2024 spills / hours 15 / 16 Long-term average 15.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Tributary of the Bothal Burn	0	0.0	down 100%	96%
Pelaw Wood St. Giles Close CSO Overflow on sewer network EA ID / permit NWL01022 · EPRBB3691AB Outlet location NZ2851242518 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Pelaw Wood Beck	0	0.0	no change	100%
Percy Road High Level CSO Overflow on sewer network EA ID / permit NWL01028 · 235/1794 Outlet location NZ3596172285 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Whitley Bay 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2016) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	0	0.0	no change	100%
Pipewellgate Pumping Station Storm discharge at pumping station EA ID / permit NWL01034 · 235/1664 Outlet location NZ2520063600 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Tyne Saline Estuary	0	0.0	no change	99%
Pont Bungalows Overflow on sewer network EA ID / permit NWL01046 · 234/1141 Outlet location NZ1224752377 (OS grid reference) · View on Apple Maps WFD catchment Pont Burn Catchment (trib of Derwent) (GB103023074780) 2024 spills / hours 0 / 0.0 Long-term average 0.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing	Pont Burn (River Derwent)	0	0.0	no change	94%
Preston Lane CSO Overflow on sewer network EA ID / permit NWL01055 · 254/1177 Outlet location NZ4327215893 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 0 / 0.0 Long-term average 1.7 spills a year (monitored since 2014) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Tees Estuary	0	0.0	no change	100%
Priestland Close CSO Overflow on sewer network EA ID / permit NWL01056 · 233/1256 Outlet location NY9335063440 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 1 / 0.8 Long-term average 0.9 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Halgut Burn	0	0.0	down 100%	92%
Princes/Woodbine(St Helens St.)CSO Overflow on sewer network EA ID / permit NWL01059 · 233/1245 Outlet location NY9900064400 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 3 / 2.5 Long-term average 2.3 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Tyne	0	0.0	down 100%	100%
Princess Anne Park CSO Overflow on sewer network EA ID / permit NWL01060 · 245/1334 Outlet location NZ3038854530 (OS grid reference) · View on Apple Maps WFD catchment Oxclose Burn to River Wear (GB510302402900) 2024 spills / hours 0 / 0.0 Long-term average 4.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Oxclose Burn (Biddick Burn)	0	0.0	no change	100%
Prissick SSO Overflow on sewer network EA ID / permit NWL01062 · QR.25/04/1575 Outlet location NZ5151917090 (OS grid reference) · View on Apple Maps WFD catchment Marton West Beck Catchment (trib of Tidal Tees) (GB103025072210) 2024 spills / hours 0 / 0.0 Long-term average 0.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Ormesby Beck	0	0.0	no change	97%
Quayside/St Lawrence Road CSO Overflow on sewer network EA ID / permit NWL01069 · 235/1766 Outlet location NZ2653864027 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 3 / 2.7 Long-term average 1.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	River Tyne Saline Estuary	0	0.0	down 100%	97%
Rear Aged Miners Homes CSO Overflow on sewer network EA ID / permit NWL01089 · 244/0916 Outlet location NZ1828844481 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Hamsteels Beck (River Browney)	0	0.0	no change	100%
Rear of 92 & 94 Charles Street CSO Overflow on sewer network EA ID / permit NWL01091 · EPRAB3290DW Outlet location NZ3543562358 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	River Don	0	0.0	no change	100%
Rear of Third Street CSO Overflow on sewer network EA ID / permit NWL01093 · 255/1211 Outlet location NZ4466041300 (OS grid reference) · View on Apple Maps WFD catchment Blackhills Gill xto North Sea (GB650301500002) 2024 spills / hours 0 / 0.0 Long-term average 1.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Blackhills Gill	0	0.0	no change	95%
Redwell SPS Storm discharge at pumping station EA ID / permit NWL01100 · 235/1588 Outlet location NZ3973765850 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Marsden 2024 spills / hours 19 / 108 Long-term average 15.7 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	0	0.0	down 100%	95%
Rennington SPS Storm discharge at pumping station EA ID / permit NWL01102 · 221/1066 Outlet location NU2133318453 (OS grid reference) · View on Apple Maps WFD catchment Rennington Burn from Source to N Sea (GB103022076360) 2024 spills / hours 15 / 83 Long-term average 13.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Rennington Burn	0	0.0	down 100%	98%
Ridley Mill Road CSO Overflow on sewer network EA ID / permit NWL01110 · 233/1254 Outlet location NZ0573060260 (OS grid reference) · View on Apple Maps WFD catchment Stocksfield Burn Catchment (trib of Tyne) (GB103023075640) 2024 spills / hours 16 / 100 Long-term average 10.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Bat Burn	0	0.0	down 100%	100%
Roker CSO Overflow on sewer network EA ID / permit NWL01117 · 245/1109 Outlet location NZ4072359220 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Roker - Sunderland 2024 spills / hours 1 / 2.0 Long-term average 0.1 spills a year (monitored since 2018) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	–	–		0%
Ropery Lane/Eardulph Ave CSO Overflow on sewer network EA ID / permit NWL01122 · 245/1088 Outlet location NZ2836950977 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 0 / 0.0 Long-term average 1.5 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Wear	0	0.0	no change	80%
Rose Crescent CSO Overflow on sewer network EA ID / permit NWL01124 · 245/1096 Outlet location NZ3094050890 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Herrington Burn to R Wear (GB103024077570) 2024 spills / hours 0 / 0.0 Long-term average 0.3 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Lumley Park Burn	0	0.0	no change	98%
Rowan Drive CSO (Du 52) Overflow on sewer network EA ID / permit NWL01129 · 245/1326 Outlet location NZ2842045860 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 0 / 0.0 Long-term average 0.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Redhouse Gill, Tributary of	0	0.0	no change	93%
Saltmeadows Pumping Station Storm discharge at pumping station EA ID / permit NWL01141 · 235/1195 Outlet location NZ2615664000 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 4 / 16 Long-term average 2.2 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement No improvement action in reporting period	River Tyne	0	0.0	down 100%	100%
Scotswood Bridge CSO Overflow on sewer network EA ID / permit NWL01147 · 235/1669 Outlet location NZ2000963684 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 1.9 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Tyne Saline Estuary	0	0.0	no change	100%
Scotswood Road CSO (C43-105) Overflow on sewer network EA ID / permit NWL01149 · EPRZB3795WT Outlet location NZ2322062914 (OS grid reference) · View on Apple Maps WFD catchment Tyne (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	River Tyne via Sw Sewer	0	0.0	no change	92%
Scotswood Road Pumping Station No 2 Storm discharge at pumping station EA ID / permit NWL01151 · 235/1670 Outlet location NZ2044463501 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2017) Monitor below 90% Installation set-up/design issue · Resolved - Oct Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	River Tyne	0	0.0	no change	89%
Sea Lane Pumping Station Storm discharge at pumping station EA ID / permit NWL01158 · 221/0987 Outlet location NU2410022990 (OS grid reference) · View on Apple Maps WFD catchment Embleton Burn form Source to N Sea (GB103022076370) 2024 spills / hours 2 / 0.5 Long-term average 0.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Embleton Burn	0	0.0	down 100%	99%
Seaburn North CSO Overflow on sewer network EA ID / permit NWL01162 · 245/1107 Outlet location NZ4058860255 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Seaburn - Sunderland 2024 spills / hours 1 / 1.0 Long-term average 1.1 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea (Whitburn Sands)	0	0.0	down 100%	99%
Seaburn South CSO Overflow on sewer network EA ID / permit NWL01163 · 245/1108 Outlet location NZ4060060190 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Seaburn - Sunderland 2024 spills / hours 1 / 1.7 Long-term average 1.2 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Mar Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	North Sea	0	0.0	down 100%	90%
Seaham South Dock CSO 1302 Overflow on sewer network EA ID / permit NWL01167 · EPRYB3835AX Outlet location NZ4325749166 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 1 / 1.5 Long-term average 0.5 spills a year (monitored since 2018) Monitor below 90% Installation set-up/design issue · Not Applicable - Ongoing investigation Investigation No investigation activity in reporting period Improvement No improvement action in reporting period	Seaham South Dock (North Sea)	0	0.0	down 100%	80%
Sheraton CSO Overflow on sewer network EA ID / permit NWL01181 · 235/A/0509 Outlet location NZ3060059900 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 1 / 2.5 Long-term average 2.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Don	0	0.0	down 100%	100%
Shotley Bridge Hospital CSO Overflow on sewer network EA ID / permit NWL01200 · 234/1116 Outlet location NZ1010052600 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing	Tinkerhill Gill	0	0.0	no change	100%
Snows Green Road CSO (DER010) Overflow on sewer network EA ID / permit NWL01218 · 234/1165 Outlet location NZ1005053260 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 11 / 53 Long-term average 5.1 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing	Derwent	0	0.0	down 100%	98%
Solingen Estate CSO Overflow on sewer network EA ID / permit NWL01219 · EPRAB3090EN Outlet location NZ3207980783 (OS grid reference) · View on Apple Maps WFD catchment BLYTH (N) (GB510302203200) Bathing water Blyth South Beach 2024 spills / hours 5 / 16 Long-term average 4.6 spills a year (monitored since 2013) Investigation Operational investigation completed Improvement Operational improvement ongoing	River Blyth (Saline Estuary)	0	0.0	down 100%	96%
South Church CSO Overflow on sewer network EA ID / permit NWL01222 · EPRBB3494EG Outlet location NZ2191628507 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Hummer Beck to Wear (GB103024072730) 2024 spills / hours 0 / 0.0 Long-term average 0.0 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing	River Gaunless	0	0.0	no change	100%
South Cleatlam CSO Overflow on sewer network EA ID / permit NWL01223 · Permit applied for Outlet location NZ1255718039 (OS grid reference) · View on Apple Maps WFD catchment Langley Bk and Westholme Bk frm Sudburn Bk to Tees (GB103025072200) 2024 spills / hours 0 / 0.0 Long-term average 2.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Newham Beck	0	0.0	no change	93%
South Farm CSO Overflow on sewer network EA ID / permit NWL01225 · 244/0941 Outlet location NZ1479043230 (OS grid reference) · View on Apple Maps WFD catchment Hedleyhope Burn from Source to Deerness (GB103024077290) 2024 spills / hours 3 / 1.5 Long-term average 3.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Ravensbush Burn	0	0.0	down 100%	100%
South Moor CSO Charles Street DER066 - Nwl name Overflow on sewer network EA ID / permit NWL01228 · Permit applied for Outlet location NZ1923451825(toaculvertedwatercoursewhichopensatNZ1972351654) (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 0 / 0.0 Long-term average 1.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed	Culverted tributary of the Stanley Burn	0	0.0	no change	91%
South Moor Road Football Club CSO Overflow on sewer network EA ID / permit NWL01230 · 245/1262 Outlet location NZ1909451305 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 0 / 0.0 Long-term average 0.4 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Stanley Burn	0	0.0	no change	98%
South of Cockfield STW CSO TE63 Overflow on sewer network EA ID / permit NWL01231 · 242/1058 Outlet location NZ1350024630 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period	Gaunless Trib	0	0.0	no change	100%

Sewage treatment works

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

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