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
Belford Sewage Treatment Works Inlet overflow at sewage works Sewage works Belford EA ID / permit NWL00110 · 221/1034 Outlet location NU1171033885 (OS grid reference) · View on Apple Maps WFD catchment Belford Burn from Source to Ross Low (GB103022076460) 2024 spills / hours 96 / 822 Long-term average 84.2 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 77 hours spilling →	Belford Burn	33	77	down 66%	99%
Durham University STW Storm tank at sewage works Sewage works Durham University EA ID / permit NWL00473 · 245/1064 Outlet location NZ2736039830 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 26 / 191 Long-term average 36.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 77 hours spilling →	Saltwell Gill	17	77	down 35%	100%
Sedgefield Sewage Treatment Works Storm tank at sewage works Sewage works Sedgefield EA ID / permit NWL01173 · 254/1864 Outlet location NZ3602027950 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Source to Bishopton Beck (GB103025072410) 2024 spills / hours 29 / 165 Long-term average 45.3 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 77 hours spilling →	Shotton Beck, Tributary of	15	77	down 48%	99%
Startforth SPS Storm discharge at pumping station EA ID / permit NWL01284 · 252/0992 Outlet location NZ0442616638 (OS grid reference) · View on Apple Maps WFD catchment Deepdale Beck from Source to River Tees (GB103025072170) 2024 spills / hours 25 / 163 Long-term average 19.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 77 hours spilling →	Deepdale Beck (Tees)	9	77	down 64%	100%
Low Southwick SPS Storm discharge at pumping station EA ID / permit NWL00817 · 245/1209 Outlet location NZ3836757920 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 58 / 140 Long-term average 58.5 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 77 hours spilling →	River Wear	41	77	down 29%	100%
Barkers Haugh No 8 CSO Overflow on sewer network EA ID / permit NWL00084 · EPRQB3897RB Outlet location NZ2749143026 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 42 / 212 Long-term average 66.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 77 hours spilling →	River Wear	22	77	down 48%	100%
Fourstones STW Storm tank at sewage works Sewage works Fourstones EA ID / permit NWL00567 · 232/1119 Outlet location NY8859067610 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Allen to North Tyne (GB103023075710) 2024 spills / hours 27 / 234 Long-term average 21.7 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 77 hours spilling →	River South Tyne	12	77	down 56%	100%
BT41 Main Street No 4 CSO Overflow on sewer network EA ID / permit NWL00214 · 210/0940 Outlet location NT9962352760 (OS grid reference) · View on Apple Maps WFD catchment River Tweed (GB510202110000) Bathing water Spittal 2024 spills / hours 57 / 152 Long-term average 46.1 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 75 hours spilling →	River Tweed Estuary	32	75	down 44%	99%
Red Row Sewage Pumping Station Storm discharge at pumping station EA ID / permit NWL01098 · 224/A/0616 Outlet location NZ2541098908 (OS grid reference) · View on Apple Maps WFD catchment Chevington Burn/Steads Burn from Source to Tidal Limit (GB103022076521) 2024 spills / hours 25 / 240 Long-term average 14.8 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 75 hours spilling →	Chevington Burn	9	75	down 64%	100%
Eastbourne East & West CSO Overflow on sewer network EA ID / permit NWL00491 · 254/1843 Outlet location NZ4431920120 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 41 / 98 Long-term average 46.7 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 75 hours spilling →	Lustrum Beck	40	75	down 2%	100%
Birtley STW Inlet overflow at sewage works Sewage works Birtley EA ID / permit NWL00133 · 235/1891 Outlet location NZ2604056690 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 45 / 177 Long-term average 36.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 74 hours spilling →	Team	21	74	down 53%	100%
Gainford Sewage Treatment Works Inlet overflow at sewage works Sewage works Gainford EA ID / permit NWL00579 · 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 21 / 107 Long-term average 12.2 spills a year (monitored since 2013) Monitor below 90% Sensor failure / issue · Resolved - Dec Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 74 hours spilling →	River Tees	12	74	down 43%	85%
Shields Road CSO Overflow on sewer network EA ID / permit NWL01188 · 245/1114 Outlet location NZ2802452071 (OS grid reference) · View on Apple Maps WFD catchment Wear DS of Lumley Park Burn to Tidal Limit (GB103024077624) 2024 spills / hours 48 / 203 Long-term average 37.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 73 hours spilling →	River Wear	25	73	down 48%	100%
Langton Beck PS Storm discharge at pumping station EA ID / permit NWL00778 · 252/1001 Outlet location NZ1746019760 (OS grid reference) · View on Apple Maps WFD catchment Piercebridge Beck from Source to Tees (GB103025072300) 2024 spills / hours 75 / 362 Long-term average 37.7 spills a year (monitored since 2019) Monitor below 90% Comms failure / issue · Resolved - May Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 73 hours spilling →	Langton Beck (Tees)	24	73	down 68%	64%
Harton Low Staithes CSO Overflow on sewer network EA ID / permit NWL00651 · 235/1908 Outlet location NZ3592067100 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 41 / 180 Long-term average 35.3 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 73 hours spilling →	Tyne Saline Estuary	24	73	down 41%	100%
Melsonby STW Storm tank at sewage works Sewage works Melsonby EA ID / permit NWL00867 · 25/02/1108 Outlet location NZ2050508264 (OS grid reference) · View on Apple Maps WFD catchment Barton Beck from Source to Clow Beck (GB103025072040) 2024 spills / hours 58 / 244 Long-term average 55.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 73 hours spilling →	Waterfall Beck	15	73	down 74%	100%
Norton SPS Storm discharge at pumping station EA ID / permit NWL00968 · 254/B/0252 Outlet location NZ4557021495 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck (GB510302509900) 2024 spills / hours 30 / 252 Long-term average 23.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 72 hours spilling →	Billingham Beck	11	72	down 63%	100%
Redworth Sewage Pumping Station Storm discharge at pumping station EA ID / permit NWL01101 · 253/D/0204 Outlet location NZ2410523582 (OS grid reference) · View on Apple Maps WFD catchment Woodham Burn from Source to Rushyford beck (GB103025072400) 2024 spills / hours 40 / 139 Long-term average 32.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 72 hours spilling →	Red House Beck, Tributary of	23	72	down 43%	100%
Warden Grove SSO Overflow on sewer network EA ID / permit NWL01451 · 245/C/0293 Outlet location NZ3378448740 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Source to Herrington Burn (GB103024077580) 2024 spills / hours 53 / 111 Long-term average 49.3 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 72 hours spilling →	Rainton Burn	40	72	down 25%	95%
Rose Cottage SPS Storm discharge at pumping station EA ID / permit NWL01123 · 233/1220 Outlet location NZ0532561761 (OS grid reference) · View on Apple Maps WFD catchment Stocksfield Burn Catchment (trib of Tyne) (GB103023075640) 2024 spills / hours 51 / 287 Long-term average 41.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 72 hours spilling →	Stocksfield Burn	26	72	down 49%	92%
Sun Street CSO Overflow on sewer network EA ID / permit NWL01324 · 254/1278 Outlet location NZ4474017762 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 29 / 80 Long-term average 28.6 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 72 hours spilling →	River Tees (Saline Estuary)	19	72	down 34%	99%
Mitchel Terrace CSO Overflow on sewer network EA ID / permit NWL00897 · 235/1822 Outlet location NZ1688252309 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 45 / 140 Long-term average 41.1 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 completed Volume & pollution Estimate from 71 hours spilling →	Kyo Burn (River Team)	40	71	down 11%	100%
Paradise Farm CSO Overflow on sewer network EA ID / permit NWL01006 · 255/1217 Outlet location NZ4343243125 (OS grid reference) · View on Apple Maps WFD catchment Horden Burn (GB650301500002) 2024 spills / hours 36 / 113 Long-term average 43.2 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 71 hours spilling →	Horden Burn	32	71	down 11%	77%
Stepping Stones CSO Overflow on sewer network EA ID / permit NWL01303 · 223/0949 Outlet location NU0631001741 (OS grid reference) · View on Apple Maps WFD catchment Coquet from Holystone Burn to Forest Burn (GB103022076692) 2024 spills / hours 35 / 136 Long-term average 27.6 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 71 hours spilling →	River Coquet	24	71	down 31%	97%
Woodland View CSO Overflow on sewer network EA ID / permit NWL01547 · 255/1184 Outlet location NZ3994037490 (OS grid reference) · View on Apple Maps WFD catchment Crimdon Beck from Source to Sea (GB103025075910) 2024 spills / hours 27 / 109 Long-term average 12.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 71 hours spilling →	Trib. of Heads Hope Burn	20	71	down 26%	100%
Belmont STW Storm tank at sewage works Sewage works Belmont EA ID / permit NWL00116 · 245/1246 Outlet location NZ3037845330 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours – / – Long-term average 11.3 spills a year (monitored since 2021) Monitor below 90% Installation set-up/design issue · Resolved - May Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 71 hours spilling →	Unnamed Trib. of River Wear	8	71		63%
Prudhoe Pumping Station Storm discharge at pumping station EA ID / permit NWL01064 · 233/0974 Outlet location NZ1030464472 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 32 / 202 Long-term average 12.4 spills a year (monitored since 2014) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 70 hours spilling →	River Tyne	16	70	down 50%	99%
Hamsterley Colliery PS Overflow on sewer network EA ID / permit NWL00641 · 234/F/0368 Outlet location NZ1253056800 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 49 / 338 Long-term average 47.1 spills a year (monitored since 2018) Monitor below 90% Comms failure / issue · Resolved - Nov Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 70 hours spilling →	Derwent	21	70	down 57%	90%
Butsfield Lane CSO DER092 Overflow on sewer network EA ID / permit NWL00229 · 244/1011 Outlet location NZ1218648274 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 56 / 144 Long-term average 52.8 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 70 hours spilling →	Smallhope Burn	46	70	down 18%	100%
Elemore Vale SPS Storm discharge at pumping station EA ID / permit NWL00508 · 245/1399 Outlet location NZ3584745708 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Source to Herrington Burn (GB103024077580) 2024 spills / hours 3 / 4.8 Long-term average 4.3 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 69 hours spilling →	Trib of Hetton Burn	14	69	up 367%	100%
Dalton Piercy SPS Storm discharge at pumping station EA ID / permit NWL00413 · 254/1077 Outlet location NZ4670131075 (OS grid reference) · View on Apple Maps WFD catchment Greatham Beck Catchment (trib of Tidal Tees) (GB103025076030) 2024 spills / hours 19 / 114 Long-term average 13.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 69 hours spilling →	Dalton Beck	15	69	down 21%	93%
Well Bank CSO TD008 Overflow on sewer network EA ID / permit NWL01472 · 233/1252 Outlet location NY9866364410 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 38 / 95 Long-term average 48.0 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 68 hours spilling →	River Tyne	40	68	up 5%	95%
CSO Salterfen SU47 Overflow on sewer network EA ID / permit NWL00398 · 255/1201 Outlet location NZ4149653876 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 20 / 47 Long-term average 28.0 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 68 hours spilling →	North Sea	42	68	up 110%	100%
Hutton Rudby Sewage Treatment Works Storm tank at sewage works Sewage works Hutton Rudby EA ID / permit NWL00724 · 25/04/1751 Outlet location NZ4656506926 (OS grid reference) · View on Apple Maps WFD catchment Leven from Tame to River Tees (GB103025071880) 2024 spills / hours 41 / 345 Long-term average 52.3 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 68 hours spilling →	River Leven	10	68	down 76%	100%
Manfield Sewage Disposal Works SSO Overflow on sewer network EA ID / permit NWL00844 · 252/E/0279 Outlet location NZ2250013600 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 56 / 98 Long-term average 44.0 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 68 hours spilling →	Tees, Ditch to	45	68	down 20%	99%
Swinburne Street CSO Overflow on sewer network EA ID / permit NWL01338 · 235/1925 Outlet location NZ2526963670 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 78 / 186 Long-term average 74.0 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 68 hours spilling →	River Tyne	50	68	down 36%	91%
Queensport Close CSO Overflow on sewer network EA ID / permit NWL01074 · 254/1829 Outlet location NZ4570020200 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 20 / 107 Long-term average 18.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 67 hours spilling →	Lustrum Beck	13	67	down 35%	99%
Rose Street CSO Overflow on sewer network EA ID / permit NWL01125 · 235/1917 Outlet location NZ2427162857 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 55 / 163 Long-term average 33.3 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 67 hours spilling →	River Tyne	23	67	down 58%	100%
Acklam Road CSO Overflow on sewer network EA ID / permit NWL01570 · 25/04/1673 Outlet location NZ4614917663 (OS grid reference) · View on Apple Maps WFD catchment Tees (GB510302509900) 2024 spills / hours 33 / 90 Long-term average 30.0 spills a year (monitored since 2023) Monitor below 90% Comms failure / issue · Resolved - Oct Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 67 hours spilling →	The Old River Tees	21	67	down 36%	83%
Whessoe SPS Storm discharge at pumping station EA ID / permit NWL01509 · 253/0053 Outlet location NZ2949017821 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 14 / 81 Long-term average 11.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 67 hours spilling →	Trib of the River Skerne	12	67	down 14%	100%
Caldbeck Ave Pottery Bank CSO Overflow on sewer network EA ID / permit NWL00235 · 235/1326 Outlet location NZ2890162949 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 33 / 123 Long-term average 22.0 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 67 hours spilling →	River Tyne Estuary	21	67	down 36%	100%
Guisborough STW Emergency Overflow Storm tank at sewage works Sewage works Guisborough Emergency Company site name GUISBOROUGH STORM WORKS EA ID / permit NWL00630 · 25/06/1021 Outlet location NZ5998016180 (OS grid reference) · View on Apple Maps WFD catchment Skelton Beck Catch (Saltburn) trib of North Sea (GB103025071970) Bathing water Saltburn 2024 spills / hours 21 / 162 Long-term average 18.3 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 66 hours spilling →	Chapel Beck - Howl Beck System	9	66	down 57%	100%
Station Bank CSO Overflow on sewer network EA ID / permit NWL01286 · 233/1024 Outlet location NZ1535165135 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 51 / 127 Long-term average 48.5 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 66 hours spilling →	River Tyne Estuarine Waters	40	66	down 22%	99%
Fishburn STW Inlet overflow at sewage works Sewage works Fishburn EA ID / permit NWL00559 · 25/03/1234 Outlet location NZ3557031740 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Source to Carrs (GB103025076070) 2024 spills / hours 21 / 77 Long-term average 16.2 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 66 hours spilling →	Trib of River Skerne	16	66	down 24%	99%
Pelaw Bank CSO CH57 Overflow on sewer network EA ID / permit NWL01020 · 245/1323 Outlet location NZ2740751630 (OS grid reference) · View on Apple Maps WFD catchment Cong Burn from Twizell Burn to Wear (GB103024077600) 2024 spills / hours 40 / 107 Long-term average 54.4 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 66 hours spilling →	Chester Burn	33	66	down 18%	100%
Stonebridge Sewage Pumping Station Storm discharge at pumping station EA ID / permit NWL01312 · 244/0491 Outlet location NZ2577041500 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 39 / 85 Long-term average 37.9 spills a year (monitored since 2014) 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 65 hours spilling →	Browney	34	65	down 13%	99%
Pelaw Wood Sewer, No 1 Baths Bridge Overflow on sewer network EA ID / permit NWL01021 · 245/0914 Outlet location NZ2775642518 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 32 / 78 Long-term average 33.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 65 hours spilling →	Wear	29	65	down 9%	96%
Scotswood Road Pumping Station No 4 Storm discharge at pumping station EA ID / permit NWL01152 · 235/1667 Outlet location NZ1942064070 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours – / – Long-term average 17.0 spills a year (monitored since 2020) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Installation set-up/design issue · Resolved - May Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 65 hours spilling →	Tyne Saline Estuary	33	65		63%
Cumberland Street SSO Overflow on sewer network EA ID / permit NWL00409 · 242/0641 Outlet location NZ2244028130 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Hummer Beck to Wear (GB103024072730) 2024 spills / hours 29 / 73 Long-term average 27.4 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 65 hours spilling →	Dene Beck	24	65	down 17%	95%
Greatham STW Inlet overflow at sewage works Sewage works Greatham EA ID / permit NWL00616 · 25/04/1858 Outlet location NZ4920227166 (OS grid reference) · View on Apple Maps WFD catchment Greatham Beck Catchment (trib of Tidal Tees) (GB103025076030) 2024 spills / hours 11 / 2.4 Long-term average 19.8 spills a year (monitored since 2022) 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 65 hours spilling →	Greatham Beck	46	65	up 318%	100%

Sewage treatment works

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

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