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
Temple Street CSO Overflow on sewer network EA ID / permit NWL01352 · 235/1943 Outlet location NZ3534566008 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 63 / 232 Long-term average 55.9 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 Operational improvement ongoing Volume & pollution Estimate from 112 hours spilling →	River Tyne Estuarine Waters	42	112	down 33%	100%
Leasingthorpe Farm CSO Overflow on sewer network EA ID / permit NWL00787 · 25/03/1252 Outlet location NZ2582930168 (OS grid reference) · View on Apple Maps WFD catchment Rushyford Beck from Source to Woodham Burn (GB103025072450) 2024 spills / hours 73 / 137 Long-term average 50.0 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 112 hours spilling →	Rushyford Beck	68	112	down 7%	93%
Coronation St CSO Overflow on sewer network EA ID / permit NWL00329 · EPRBP3720XY Outlet location NZ3583766907 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 40 / 201 Long-term average 31.3 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 112 hours spilling →	River Tyne (Estuary)	19	112	down 53%	100%
Acklam Road CSO Overflow on sewer network EA ID / permit NWL01569 · 25/04/1673 Outlet location NZ4614917663 (OS grid reference) · View on Apple Maps WFD catchment Tees (GB510302509900) 2024 spills / hours 33 / 122 Long-term average 32.3 spills a year (monitored since 2023) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 112 hours spilling →	The Old River Tees	29	112	down 12%	100%
Newcastle Upon Tyne CSO Overflow on sewer network EA ID / permit NWL00947 · EPRCB3097AS Outlet location NZ2579864070 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 87 / 455 Long-term average 73.3 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 111 hours spilling →	River Tyne (Tidal)	22	111	down 75%	36%
Wooler STW Inlet overflow at sewage works Sewage works Wooler EA ID / permit NWL01553 · 210/1275 Outlet location NT9990629453 (OS grid reference) · View on Apple Maps WFD catchment Wooler Water from Harthope Burn to Till (GB102021072930) 2024 spills / hours 85 / 207 Long-term average 63.5 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 110 hours spilling →	Wooler Water	68	110	down 20%	100%
Prince Consort Road SPS Storm discharge at pumping station EA ID / permit NWL01058 · 235/1657 Outlet location NZ3007064916 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 55 / 243 Long-term average 48.5 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 109 hours spilling →	River Tyne	39	109	down 29%	100%
Esh Winning SPS Storm discharge at pumping station EA ID / permit NWL00525 · 244/0884 Outlet location NZ1920941546 (OS grid reference) · View on Apple Maps WFD catchment Deerness from Source to Hedleyhope Burn (GB103024077270) 2024 spills / hours 25 / 181 Long-term average 35.3 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 109 hours spilling →	River Deerness	20	109	down 20%	100%
Station Hotel SPS Storm discharge at pumping station EA ID / permit NWL01287 · 256/1078 Outlet location NZ7186518096 (OS grid reference) · View on Apple Maps WFD catchment Middle Gill Beck from Source to Kilton Beck (GB103025071940) 2024 spills / hours 39 / 211 Long-term average 26.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 109 hours spilling →	Loftus Beck	27	109	down 31%	100%
North Hylton SPS Storm discharge at pumping station EA ID / permit NWL00962 · 245/0938 Outlet location NZ3530157322 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 34 / 144 Long-term average 26.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 108 hours spilling →	River Wear	16	108	down 53%	100%
Lysndon Farm CSO Overflow on sewer network EA ID / permit NWL00832 · 226/1196 Outlet location NZ3101477666 (OS grid reference) · View on Apple Maps WFD catchment Lylsdon Burn to North Sea (GB650301500002) Bathing water Blyth South Beach 2024 spills / hours 33 / 306 Long-term average 28.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 108 hours spilling →	Lysdon Burn (Coastal Stream)	19	108	down 42%	100%
Mill Inn A SSO Overflow on sewer network EA ID / permit NWL00886 · 255/1153 Outlet location NZ4088049850 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB650301500002) Bathing water Seaham Hall Beach 2024 spills / hours 15 / 104 Long-term average 2.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 108 hours spilling →	Seaton Burn	11	108	down 27%	99%
Bodlewell Lane CSO Overflow on sewer network EA ID / permit NWL00167 · 245/0983 Outlet location NZ4031057394 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 33 / 150 Long-term average 45.9 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 108 hours spilling →	Wear Estuary	24	108	down 27%	84%
CSO at Bedesway Overflow on sewer network EA ID / permit NWL00365 · 235/1276 Outlet location NZ3441265064 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 56 / 232 Long-term average 58.8 spills a year (monitored since 2018) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 106 hours spilling →	River Don	39	106	down 30%	100%
Butteryhaugh SPS Storm discharge at pumping station EA ID / permit NWL00232 · 231/0965 Outlet location NY6320392939 (OS grid reference) · View on Apple Maps WFD catchment N Tyne from Source to Lewis Burn (GB103023075081) 2024 spills / hours 23 / 208 Long-term average 17.5 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 106 hours spilling →	River North Tyne	15	106	down 35%	100%
Stokesley Pumping Station No 1 SSO Storm discharge at pumping station EA ID / permit NWL01309 · 254/C/0427 Outlet location NZ5230008400 (OS grid reference) · View on Apple Maps WFD catchment Leven from Source to Tame (GB103025071890) 2024 spills / hours 31 / 193 Long-term average 28.3 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 105 hours spilling →	Leven	29	105	down 6%	98%
Croft SPS Storm discharge at pumping station EA ID / permit NWL00349 · 254/1018 Outlet location NZ2897809202 (OS grid reference) · View on Apple Maps WFD catchment Spa Beck Catchment (trib of Tees) (GB103025072030) 2024 spills / hours 6 / 42 Long-term average 23.8 spills a year (monitored since 2020) Monitor below 90% Installation set-up/design issue · Resolved - May Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 105 hours spilling →	Spa Beck	17	105	up 183%	70%
Pesspool Lane CSO Overflow on sewer network EA ID / permit NWL01029 · 255/1179 Outlet location NZ3852843622 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 20 / 215 Long-term average 24.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 105 hours spilling →	Caldwell Burn	11	105	down 45%	100%
Lindom Avenue CSO Overflow on sewer network EA ID / permit NWL00794 · 245/1379 Outlet location NZ2799951355 (OS grid reference) · View on Apple Maps WFD catchment Wear DS of Lumley Park Burn to Tidal Limit (GB103024077624) 2024 spills / hours 31 / 197 Long-term average 24.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 105 hours spilling →	River Wear	16	105	down 48%	100%
Low Lane Pumping Station Storm discharge at pumping station EA ID / permit NWL01539 · 241/1080 Outlet location NZ1537031343 (OS grid reference) · View on Apple Maps WFD catchment Wear from Houselop Beck to Beechburn Beck (GB103024077462) 2024 spills / hours 57 / 761 Long-term average 50.8 spills a year (monitored since 2013) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 104 hours spilling →	River Wear	34	104	down 40%	95%
Tees Dock Road CSO Overflow on sewer network EA ID / permit NWL01347 · 254/1935 Outlet location NZ5536122142 (OS grid reference) · View on Apple Maps WFD catchment River Tees Estury (GB510302509900) 2024 spills / hours 35 / 209 Long-term average 30.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 104 hours spilling →	Kinkerdale Beck	19	104	down 46%	92%
Eastern Way SSO Overflow on sewer network EA ID / permit NWL00494 · 226/A/0971 Outlet location NZ1581072500 (OS grid reference) · View on Apple Maps WFD catchment Pont from Med Burn to Small Burn (GB103022076860) 2024 spills / hours 54 / 352 Long-term average 37.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 103 hours spilling →	Pont	29	103	down 46%	100%
Millfield SPS Storm discharge at pumping station EA ID / permit NWL00893 · 210/A/0440 Outlet location NT9762651540 (OS grid reference) · View on Apple Maps WFD catchment River Tweed (GB510202110000) 2024 spills / hours 30 / 129 Long-term average 21.9 spills a year (monitored since 2019) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Telemetry or data archiving failure / issue · Resolved - Oct Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 103 hours spilling →	Watercourse to River Tweed	36	103	up 20%	77%
Tindale STW Inlet overflow at sewage works Sewage works Tindale EA ID / permit NWL01387 · 232/1147 Outlet location NY6196059256 (OS grid reference) · View on Apple Maps WFD catchment Hartley Burn from Source to Black Burn (GB103023075470) 2024 spills / hours 12 / 38 Long-term average 15.3 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 103 hours spilling →	Tarn Beck	19	103	up 58%	100%
The Caravan Park CSO Overflow on sewer network EA ID / permit NWL01356 · 232/1153 Outlet location NY7164846704 (OS grid reference) · View on Apple Maps WFD catchment Nent from Source to South Tyne (GB103023075420) 2024 spills / hours 91 / 230 Long-term average 78.6 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 103 hours spilling →	River Nent	51	103	down 44%	99%
CSO Redheugh Bridge Overflow on sewer network EA ID / permit NWL00397 · 235/1627 Outlet location NZ2440963160 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 65 / 181 Long-term average 40.9 spills a year (monitored since 2013) High-spill reason (company) Data collection - Tidal / river inundation Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 102 hours spilling →	Tyne Estuary	46	102	down 29%	100%
Holyhill Gardens East CSO Overflow on sewer network EA ID / permit NWL00699 · 245/1075 Outlet location NZ2035251914 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 61 / 310 Long-term average 68.3 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 102 hours spilling →	Stanley Burn	44	102	down 28%	91%
First School CSO NTY002 Overflow on sewer network EA ID / permit NWL00556 · 226/G/0173 Outlet location NZ2391373465 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 51 / 274 Long-term average 46.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 101 hours spilling →	Hartley Burn	27	101	down 47%	100%
Levenside/Manor Close CSO Overflow on sewer network EA ID / permit NWL00791 · QR.25/04/1571 Outlet location NZ5267008555 (OS grid reference) · View on Apple Maps WFD catchment Leven from Source to Tame (GB103025071890) 2024 spills / hours 30 / 162 Long-term average 21.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 100 hours spilling →	River Leven	24	100	down 20%	100%
Magdalene Fields North CSO Overflow on sewer network EA ID / permit NWL00836 · 210/1355 Outlet location NU0009954653,NU0010954736&NU0011454649 (OS grid reference) · View on Apple Maps WFD catchment Northumberland North (GB650301440000) 2024 spills / hours 85 / 185 Long-term average 78.5 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Jun Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 100 hours spilling →	North Sea	66	100	down 22%	88%
Castle Terrace 1 CSO Overflow on sewer network EA ID / permit NWL00252 · 210/1356 Outlet location NT9927653342 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 54 / 118 Long-term average 44.4 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 99 hours spilling →	River Tweed (Saline Estuary)	51	99	down 6%	96%
Stokesley Sewage Treatment Works Storm tank at sewage works Sewage works Stokesley EA ID / permit NWL01310 · 25/04/1656 Outlet location NZ5221807752 (OS grid reference) · View on Apple Maps WFD catchment Broughton Beck from Source to River Leven (GB103025071870) 2024 spills / hours 38 / 469 Long-term average 27.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 99 hours spilling →	River Leven	15	99	down 61%	100%
Armonside Rd Connolly Terrace CSO Overflow on sewer network EA ID / permit NWL00059 · 234/1124 Outlet location NZ1287756827 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 43 / 224 Long-term average 37.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 99 hours spilling →	River Derwent	22	99	down 49%	94%
Grangefield Road SSO Overflow on sewer network EA ID / permit NWL00604 · 25/04/1627 Outlet location NZ4340019200 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 33 / 111 Long-term average 17.2 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 99 hours spilling →	Lustrum Beck	31	99	down 6%	100%
Sunderland Bridge SPS Storm discharge at pumping station EA ID / permit NWL01585 · EPRYB3591RE Outlet location NZ2636837642 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 14 / 147 Long-term average 11.0 spills a year (monitored since 2025) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 99 hours spilling →	River Wear	11	99	down 21%	100%
Old Cleatlam STW Storm tank at sewage works Sewage works Old Cleatlam EA ID / permit NWL00976 · 252/0060 Outlet location NZ1213119704 (OS grid reference) · View on Apple Maps WFD catchment Sudburn Beck from Source to Langley Beck (GB103025072270) 2024 spills / hours 62 / 603 Long-term average 33.5 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 99 hours spilling →	Langley Beck, Tributary of	12	99	down 81%	99%
Ulgham Sewage Treatment Works Storm tank at sewage works Sewage works Ulgham EA ID / permit NWL01420 · 224/A/0886 Outlet location NZ2348592593&NZ2347192569 (OS grid reference) · View on Apple Maps WFD catchment Lyne from Source to Tidal Limit (GB103022076820) 2024 spills / hours 47 / 328 Long-term average 44.8 spills a year (monitored since 2021) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 98 hours spilling →	River Lyne	31	98	down 34%	100%
Stonebridge Sewage Pumping Station Storm discharge at pumping station EA ID / permit NWL01313 · 244/0491 Outlet location NZ2577041500 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 30 / 152 Long-term average 39.8 spills a year (monitored since 2021) Monitor below 90% Comms failure / issue · Resolved - Jun Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 98 hours spilling →	Browney	24	98	down 20%	86%
Spittal Quay CSO (BT7) Overflow on sewer network EA ID / permit NWL01252 · 210/1360 Outlet location NU0018151930 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 67 / 265 Long-term average 60.5 spills a year (monitored since 2015) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 98 hours spilling →	River Tweed (Saline Estuary)	46	98	down 31%	97%
Wincomblee C Pumping Station Storm discharge at pumping station EA ID / permit NWL01531 · 235/1758 Outlet location NZ2981264400 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 24 / 75 Long-term average 26.2 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 97 hours spilling →	River Tyne Saline Estuary	22	97	down 8%	100%
Queens Gardens CSO Overflow on sewer network EA ID / permit NWL01073 · 210/1007 Outlet location NT9962352760 (OS grid reference) · View on Apple Maps WFD catchment River Tweed Estury (GB510202110000) Bathing water Spittal 2024 spills / hours 71 / 186 Long-term average 61.3 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 97 hours spilling →	Tweed Estuary	39	97	down 45%	91%
Leasingthorne SPS CSO Storm discharge at pumping station EA ID / permit NWL00786 · 25/03/1268 Outlet location NZ2572230191 (OS grid reference) · View on Apple Maps WFD catchment Rushyford Beck from Source to Woodham Burn (GB103025072450) 2024 spills / hours 53 / 138 Long-term average 43.4 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 97 hours spilling →	Rushyford Beck	44	97	down 17%	98%
Bishopton Mill PS Storm discharge at pumping station EA ID / permit NWL00139 · 25/04/1766 Outlet location NZ3791022550 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Bishopton Bck to Brierle (GB103025072360) 2024 spills / hours 44 / 363 Long-term average 39.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 96 hours spilling →	Whitton Beck	19	96	down 57%	100%
Pinewood Gardens CSO Overflow on sewer network EA ID / permit NWL01033 · 235/1968 Outlet location NZ2409959833 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 42 / 80 Long-term average 32.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Jun Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 96 hours spilling →	Black Burn	39	96	down 7%	87%
Welwyn Factory CSO Overflow on sewer network EA ID / permit NWL01476 · 226/1267 Outlet location NZ2785783760 (OS grid reference) · View on Apple Maps WFD catchment Sleek Burn / Hepscott Burn Source to Tidal Limit (GB103022076230) 2024 spills / hours 25 / 64 Long-term average 36.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 96 hours spilling →	Sleekburn	29	96	up 16%	100%
Granville Tce SSO Overflow on sewer network EA ID / permit NWL00606 · 256/1068 Outlet location NZ6165025250 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Redcar Granville; Redcar Stray 2024 spills / hours 25 / 155 Long-term average 36.2 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 95 hours spilling →	North Sea	24	95	down 4%	100%
Smailes Lane CSO G15 Overflow on sewer network EA ID / permit NWL01213 · 234/1158 Outlet location NZ1536758832 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 51 / 292 Long-term average 38.1 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 95 hours spilling →	Low Spen Burn	38	95	down 25%	93%
Beehive CSO Overflow on sewer network EA ID / permit NWL00108 · 226/1271 Outlet location NZ3286273332 (OS grid reference) · View on Apple Maps WFD catchment Brierdene Burn from Source to North Sea (GB103022076180) 2024 spills / hours 51 / 227 Long-term average 39.1 spills a year (monitored since 2018) 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 94 hours spilling →	Brierdene Burn	35	94	down 31%	100%
Metrocentre, Green Car Park Overflow on sewer network EA ID / permit NWL00871 · 235/2002 Outlet location NZ2224762912 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 88 / 553 Long-term average 100.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 94 hours spilling →	River Tyne (Estuary)	29	94	down 67%	100%
Trimdon Village STW Inlet overflow at sewage works Sewage works Trimdon Village EA ID / permit NWL01402 · 25/03/1232 Outlet location NZ3760334523 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Source to Carrs (GB103025076070) 2024 spills / hours 21 / 45 Long-term average 17.3 spills a year (monitored since 2022) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Sensor failure / issue · Resolved - Jul Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 93 hours spilling →	River Skerne	38	93	up 81%	69%

Sewage treatment works

Storm tanks and inlet overflows at each Northumbrian 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.