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
Etherley Lane CSO Overflow on sewer network EA ID / permit NWL00530 · 241/1156 Outlet location NZ1943228844 (OS grid reference) · View on Apple Maps WFD catchment Wear from Beechburn Beck to Gaunless (GB103024077463) 2024 spills / hours 64 / 471 Long-term average 53.3 spills a year (monitored since 2013) 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 206 hours spilling →	Coal Burn	40	206	down 38%	98%
Wellington Road CSO (E9-102) Overflow on sewer network EA ID / permit NWL01475 · Permit applied for Outlet location NZ2224662911 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 55 / 537 Long-term average 48.8 spills a year (monitored since 2021) 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 206 hours spilling →	River Tyne	31	206	down 44%	100%
Nicky Nack Pumping Station Storm discharge at pumping station EA ID / permit NWL00954 · 243/0933 Outlet location NZ2646636663 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 10 / 8.1 Long-term average 16.7 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 205 hours spilling →	Nicky Nack Beck	39	205	up 290%	100%
Clevland Road C.S.O. Overflow on sewer network EA ID / permit NWL00296 · 255/5016 Outlet location NZ5113134233 (OS grid reference) · View on Apple Maps WFD catchment Hart Beck from Source to Sea (Hartlepool) (GB103025075880) 2024 spills / hours 51 / 619 Long-term average 46.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 204 hours spilling →	The Slake	28	204	down 45%	91%
White Street Station Road CSO Overflow on sewer network EA ID / permit NWL01516 · 235/1330 Outlet location NZ2981264400&NZ2981264383 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 91 / 376 Long-term average 58.2 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 202 hours spilling →	River Tyne Estuary	66	202	down 27%	100%
The Green Market CSO Overflow on sewer network EA ID / permit NWL01361 · 235/1484 Outlet location NZ2450060481 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 72 / 311 Long-term average 73.3 spills a year (monitored since 2019) 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 202 hours spilling →	River Team	81	202	up 13%	96%
Burn Closes CSO Overflow on sewer network EA ID / permit NWL00217 · 235/1776 Outlet location NZ3115366916 (OS grid reference) · View on Apple Maps WFD catchment Wallsend Burn (Trib of Tyne) (GB103023075760) 2024 spills / hours 77 / 399 Long-term average 90.9 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 201 hours spilling →	Wallsend Burn Estuarine Waters	54	201	down 30%	79%
Deptford Pumping Station Storm discharge at pumping station EA ID / permit NWL00440 · 245/1212 Outlet location NZ3839457813 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 46 / 211 Long-term average 56.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 200 hours spilling →	River Wear (Saline Estuary)	46	200	no change	100%
Haydon Bridge STW Storm tank at sewage works Sewage works Haydon Bridge EA ID / permit NWL00659 · 232/1165 Outlet location NY8502164748 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Allen to North Tyne (GB103023075710) 2024 spills / hours 70 / 902 Long-term average 42.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 200 hours spilling →	River South Tyne	25	200	down 64%	100%
Middleton One Row CSO Overflow on sewer network EA ID / permit NWL00876 · 254/1540 Outlet location NZ3501812262 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 50 / 292 Long-term average 47.1 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 200 hours spilling →	The River Tees	38	200	down 24%	99%
Bowburn STW (2002) Storm tank at sewage works Sewage works Bowburn EA ID / permit NWL00179 · 243/0970 Outlet location NZ3009036978 (OS grid reference) · View on Apple Maps WFD catchment Croxdale Beck from Source to Wear (GB103024077410) 2024 spills / hours 37 / 406 Long-term average 24.5 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 199 hours spilling →	Bowburn Beck	22	199	down 41%	100%
Riversideway CSO Overflow on sewer network EA ID / permit NWL01116 · EPRCB3191VZ Outlet location NZ2047663110 (OS grid reference) · View on Apple Maps WFD catchment River Derwent (GB510302310200) 2024 spills / hours 41 / 414 Long-term average 34.6 spills a year (monitored since 2019) Monitor below 90% Comms failure / issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 195 hours spilling →	River Derwent	29	195	down 29%	74%
Embleton Sewage Treatment Works Storm tank at sewage works Sewage works Embleton EA ID / permit NWL01581 · 221/A/0845 Outlet location NU2332621854 (OS grid reference) · View on Apple Maps WFD catchment Embleton Burn form Source to N Sea (GB103022076370) 2024 spills / hours 26 / 147 Long-term average 24.0 spills a year (monitored since 2023) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 195 hours spilling →	Embleton Burn	36	195	up 38%	100%
Bowburn STW (2002) Inlet overflow at sewage works Sewage works Bowburn Company site name BOWBURN STW EA ID / permit NWL00178 · 243/0970 Outlet location NZ3009136993 (OS grid reference) · View on Apple Maps WFD catchment Croxdale Beck from Source to Wear (GB103024077410) 2024 spills / hours 39 / 263 Long-term average 39.2 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 195 hours spilling →	Bowburn Beck	40	195	up 3%	97%
Jarrow Slake SPS Storm discharge at pumping station EA ID / permit NWL00736 · 235/1405 Outlet location NZ3487964893 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 49 / 549 Long-term average 49.2 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 192 hours spilling →	River Don	27	192	down 45%	100%
South Shore Road East SPS Storm discharge at pumping station EA ID / permit NWL01240 · 235/1658 Outlet location NZ2696163372 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 63 / 228 Long-term average 80.2 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 191 hours spilling →	River Tyne, North Sea	62	191	down 2%	100%
Mill Lane CSO Overflow on sewer network EA ID / permit NWL00887 · 256/1063 Outlet location NZ7115019350 (OS grid reference) · View on Apple Maps WFD catchment Kilton Beck from Middle Gill Beck to North Sea (GB103025071950) 2024 spills / hours 48 / 292 Long-term average 41.8 spills a year (monitored since 2015) 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 189 hours spilling →	Skinningrove Beck	57	189	up 19%	94%
Front Street CSO Overflow on sewer network EA ID / permit NWL00572 · EPRJB3292WB Outlet location NZ2150845221 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl Water Body (GB103024077551) 2024 spills / hours 74 / 266 Long-term average 78.4 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Mar Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 188 hours spilling →	River Browney	77	188	up 4%	88%
Hawthorn STW Storm tank at sewage works Sewage works Hawthorn EA ID / permit NWL00655 · 255/1220 Outlet location NZ4277045650 (OS grid reference) · View on Apple Maps WFD catchment Hawthorn Burn from Source to North Sea (GB103025075950) 2024 spills / hours 20 / 168 Long-term average 35.0 spills a year (monitored since 2024) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 188 hours spilling →	North Dene Burn	50	188	up 150%	100%
West Road CSO Overflow on sewer network EA ID / permit NWL01491 · 241/1138 Outlet location NZ1638335029 (OS grid reference) · View on Apple Maps WFD catchment Beechburn Beck (Trib of Wear) (GB103024077390) 2024 spills / hours 45 / 275 Long-term average 39.7 spills a year (monitored since 2013) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 187 hours spilling →	Crook Beck, Tributary of	37	187	down 18%	93%
Howdon STW Inlet overflow at sewage works Sewage works Howdon EA ID / permit NWL00712 · 235/1695 Outlet location NZ3370066130 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 83 / 723 Long-term average 67.5 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 187 hours spilling →	River Tyne Saline Estuary	33	187	down 60%	100%
Stressholme STW Storm tank at sewage works Sewage works Stressholme EA ID / permit NWL01321 · 25/04/1797 Outlet location NZ2873010160 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 54 / 591 Long-term average 42.0 spills a year (monitored since 2024) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 187 hours spilling →	Tees	30	187	down 44%	100%
Lynwood House CSO DER44 Overflow on sewer network EA ID / permit NWL00831 · 244/1021 Outlet location NZ1678047071 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 67 / 356 Long-term average 65.2 spills a year (monitored since 2013) 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 185 hours spilling →	Smallhope Burn	53	185	down 21%	100%
Denton Road CSO NC027 Overflow on sewer network EA ID / permit NWL00439 · 235/1937 Outlet location NZ1965463974 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 92 / 382 Long-term average 94.9 spills a year (monitored since 2018) 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 185 hours spilling →	River Tyne	78	185	down 15%	100%
Frankland Lane CSO Overflow on sewer network EA ID / permit NWL00568 · 245/1272 Outlet location NZ2741543020 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 17 / 153 Long-term average 49.0 spills a year (monitored since 2013) 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 185 hours spilling →	River Wear	40	185	up 135%	94%
Plawsworth Sewage Treatment Works Storm tank at sewage works Sewage works Plawsworth EA ID / permit NWL01041 · 245/A/0712 Outlet location NZ2646647468 (OS grid reference) · View on Apple Maps WFD catchment Blackdene Burn to confluence with Wear (GB103024077622) 2024 spills / hours 76 / 801 Long-term average 71.7 spills a year (monitored since 2021) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 184 hours spilling →	Black Dene Burn	34	184	down 55%	98%
Eppleby STW Storm tank at sewage works Sewage works Eppleby EA ID / permit NWL00519 · 25/02/1107 Outlet location NZ1816113065 (OS grid reference) · View on Apple Maps WFD catchment Aldbrough Beck from Source to Clow Beck (GB103025072150) 2024 spills / hours 5 / 37 Long-term average 124.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 183 hours spilling →	Forcett Beck (Tees Catchment)	26	183	up 420%	100%
Dalton-Le-Dale CSO Overflow on sewer network EA ID / permit NWL00415 · 255/D/0277 Outlet location NZ4151148303 (OS grid reference) · View on Apple Maps WFD catchment Dalton Beck to North Sea (GB103025075970) Bathing water Seaham Hall Beach 2024 spills / hours 41 / 211 Long-term average 53.9 spills a year (monitored since 2013) 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 183 hours spilling →	Dawdon Dene Beck	45	183	up 10%	99%
Cramlington Sewage Treatment Works Storm tank at sewage works Sewage works Cramlington EA ID / permit NWL00341 · 226/1187 Outlet location NZ2952082460 (OS grid reference) · View on Apple Maps WFD catchment BLYTH (N) (GB510302203200) 2024 spills / hours 49 / 439 Long-term average 27.3 spills a year (monitored since 2022) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 183 hours spilling →	River Blyth (Saline Estuary)	24	183	down 51%	94%
Eastbourne South/Dundas St CSO Overflow on sewer network EA ID / permit NWL00492 · 254/1380 Outlet location NZ4431920120 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 51 / 240 Long-term average 45.6 spills a year (monitored since 2015) 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 182 hours spilling →	Lustrum Beck	44	182	down 14%	91%
Sherburn Sewage Treatment Works Storm tank at sewage works Sewage works Sherburn EA ID / permit NWL01183 · 245/1248 Outlet location NZ3165041830 (OS grid reference) · View on Apple Maps WFD catchment Old Durham Beck from Source to Pittington Beck (GB103024077490) 2024 spills / hours 61 / 588 Long-term average 51.2 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 181 hours spilling →	Sherburn Beck	32	181	down 48%	100%
Horden Dene Pumping Station Storm discharge at pumping station EA ID / permit NWL00474 · 255/1146 Outlet location NZ4467843638 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 60 / 267 Long-term average 67.2 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 181 hours spilling →	North Sea	55	181	down 8%	100%
Gainford Sewage Treatment Works Storm tank at sewage works Sewage works Gainford EA ID / permit NWL00578 · 25/02/1078 Outlet location NZ1771016320 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 83 / 807 Long-term average 56.0 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 180 hours spilling →	River Tees	31	180	down 63%	100%
Station Road Storm Sewage Overflow Overflow on sewer network EA ID / permit NWL01295 · 254/1809 Outlet location NZ4522022940 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 50 / 172 Long-term average 39.7 spills a year (monitored since 2013) 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 179 hours spilling →	Billinghan Beck	50	179	no change	98%
Station Road CSO G020 Overflow on sewer network EA ID / permit NWL01294 · 235/1702 Outlet location NZ3426262739 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 50 / 483 Long-term average 50.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 179 hours spilling →	River Don	32	179	down 36%	95%
Davy Bank SPS Storm discharge at pumping station EA ID / permit NWL00423 · 235/1687 Outlet location NZ3087766015 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 79 / 467 Long-term average 40.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 179 hours spilling →	River Tyne	56	179	down 29%	96%
St Peters Pumping Station Outfall N Storm discharge at pumping station EA ID / permit NWL01268 · 245/1004 Outlet location NZ4011057550 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 16 / 96 Long-term average 21.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 178 hours spilling →	Wear Estuary	15	178	down 6%	100%
Gellesfield CSO Overflow on sewer network EA ID / permit NWL00584 · 234/1059 Outlet location NZ2089659556 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 75 / 287 Long-term average 53.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Sensor failure / issue · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 178 hours spilling →	Black Burn	52	178	down 31%	59%
Market Lane CSO Overflow on sewer network EA ID / permit NWL00853 · 234/1017 Outlet location NZ2145361776 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 71 / 398 Long-term average 66.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 178 hours spilling →	Tyne Trib	51	178	down 28%	98%
CSO Skelton (Saltburn Lane) Overflow on sewer network EA ID / permit NWL00399 · 25/06/0986 Outlet location NZ6671619795 (OS grid reference) · View on Apple Maps WFD catchment Saltburn Gill Catch trib of North Sea (GB103025071960) Bathing water Saltburn 2024 spills / hours 43 / 295 Long-term average 30.1 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 178 hours spilling →	Trib of Saltburn Gill	20	178	down 53%	100%
Mitchell Avenue SPS Storm discharge at pumping station EA ID / permit NWL00898 · 221/1075 Outlet location NU2262632327 (OS grid reference) · View on Apple Maps WFD catchment Farne Islands to Newton Haven (GB620301100000) Bathing water Seahouses North 2024 spills / hours 45 / 232 Long-term average 21.5 spills a year (monitored since 2018) High-spill reason (company) Performance - Asset configuration (e.g. PS/rising main/storm tanks) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 176 hours spilling →	North Sea	43	176	down 4%	100%
Lockhaugh STW Storm tank at sewage works Sewage works Lockhaugh EA ID / permit NWL00803 · 234/1072 Outlet location NZ1718058850 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 37 / 299 Long-term average 63.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 176 hours spilling →	River Derwent	29	176	down 22%	100%
Eldon Street CSO Overflow on sewer network EA ID / permit NWL00507 · 235/1944 Outlet location NZ3534566008 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 66 / 355 Long-term average 50.3 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 175 hours spilling →	River Tyne Estuarine Waters	50	175	down 24%	100%
Morpeth STW Storm tank at sewage works Sewage works Morpeth EA ID / permit NWL00909 · 225/1036 Outlet location NZ2086686427 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Font to Bothal Burn (GB103022077061) 2024 spills / hours 40 / 385 Long-term average 25.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 174 hours spilling →	River Wansbeck	18	174	down 55%	100%
Birtley STW Storm tank at sewage works Sewage works Birtley EA ID / permit NWL00134 · 235/1891 Outlet location NZ2603056630 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 53 / 545 Long-term average 36.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 173 hours spilling →	Team	23	173	down 57%	100%
Witton Gilbert STW Overflow on sewer network EA ID / permit NWL01538 · 244/0889 Outlet location NZ2328145066 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 75 / 313 Long-term average 69.5 spills a year (monitored since 2013) 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 173 hours spilling →	River Browney	55	173	down 27%	99%
Seaton Sluice Pumping Station Storm discharge at pumping station EA ID / permit NWL01172 · 226/0946 Outlet location NZ3398276994 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Seaton Sluice 2024 spills / hours 30 / 261 Long-term average 20.8 spills a year (monitored since 2018) Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 171 hours spilling →	North Sea	20	171	down 33%	100%
Tilery Storm Sewage Pumping Station Overflow on sewer network EA ID / permit NWL01386 · 254/1822 Outlet location NZ4510020400 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 25 / 173 Long-term average 43.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 171 hours spilling →	Lustrum Beck	28	171	up 12%	100%
Stanhope STW Storm tank at sewage works Sewage works Stanhope EA ID / permit NWL01280 · 241/1100 Outlet location NZ0072337866 (OS grid reference) · View on Apple Maps WFD catchment Wear from Middlehope Burn to Houselop Beck (GB103024077461) 2024 spills / hours 58 / 483 Long-term average 54.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 170 hours spilling →	River Wear	29	170	down 50%	100%
Hutton Rudby SPS Storm discharge at pumping station EA ID / permit NWL00725 · 25/04/1643 Outlet location NZ4698206573 (OS grid reference) · View on Apple Maps WFD catchment Leven from Tame to River Tees (GB103025071880) 2024 spills / hours 50 / 321 Long-term average 48.7 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 169 hours spilling →	River Leven	41	169	down 18%	100%

Sewage treatment works

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

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