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
Plawsworth Gate Combined Sewer Overflow Overflow on sewer network EA ID / permit NWL01040 · EPRKP3329PK Outlet location NZ2632347177 (OS grid reference) · View on Apple Maps WFD catchment Blackdene Burn to confluence with Wear (GB103024077622) 2024 spills / hours 45 / 164 Long-term average 41.8 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 65 hours spilling →	Blackdene Burn	45	65	no change	100%
Sadberge Sewage Treatment Works Inlet overflow at sewage works Sewage works Sadberge EA ID / permit NWL01137 · 25/03/1235 Outlet location NZ3409117357 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 33 / 87 Long-term average 29.2 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 65 hours spilling →	Carcut Beck (Skerne Catchment)	25	65	down 24%	100%
Pelton Fell Road CSO Overflow on sewer network EA ID / permit NWL01025 · 245/1335 Outlet location NZ2677251763 (OS grid reference) · View on Apple Maps WFD catchment Cong Burn from Twizell Burn to Wear (GB103024077600) 2024 spills / hours 45 / 205 Long-term average 39.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 64 hours spilling →	Chester Burn	22	64	down 51%	100%
Long Newton Sewage Treatment Works Storm tank at sewage works Sewage works Long Newton EA ID / permit NWL00806 · 254/1940 Outlet location NZ3898016640 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 47 / 480 Long-term average 38.3 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 64 hours spilling →	Longnewton Beck-(Tees Catchmnt	8	64	down 83%	99%
Deneside CSO Overflow on sewer network EA ID / permit NWL00437 · 244/0959 Outlet location NZ2361845880 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 42 / 125 Long-term average 37.6 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 64 hours spilling →	Dene Burn	40	64	down 5%	98%
Beadnell Harbour SPS Storm discharge at pumping station EA ID / permit NWL00097 · 221/1072 Outlet location NU2388628578 (OS grid reference) · View on Apple Maps WFD catchment Farne Islands to Newton Haven (GB620301100000) Bathing water Beadnell 2024 spills / hours 31 / 115 Long-term average 24.1 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 63 hours spilling →	North Sea	23	63	down 26%	100%
Lustrum High Level CSO Overflow on sewer network EA ID / permit NWL00825 · 254/1830 Outlet location NZ4305018748 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 34 / 91 Long-term average 38.3 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 Volume & pollution Estimate from 63 hours spilling →	Lustrum Beck	29	63	down 15%	86%
Falstone & Stannersburn Sewage Trea Inlet overflow at sewage works Sewage works Falstone And Stannersburn Sewage Trea EA ID / permit NWL00537 · 231/A/0490 Outlet location NY7230087000 (OS grid reference) · View on Apple Maps WFD catchment N Tyne from Lewis Burn to Tarset Burn (GB103023075070) 2024 spills / hours – / – Long-term average 13.5 spills a year (monitored since 2022) Monitor below 90% Installation set-up/design issue · Resolved - Mar Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 63 hours spilling →	North Tyne	8	63		80%
Floaters Mill SPS Storm discharge at pumping station EA ID / permit NWL00562 · 245/E/0594 Outlet location NZ3124750786 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Herrington Burn to R Wear (GB103024077570) 2024 spills / hours 32 / 139 Long-term average 19.5 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 63 hours spilling →	Lumley Park Burn	18	63	down 44%	100%
Lockhaugh STW Inlet overflow at sewage works Sewage works Lockhaugh EA ID / permit NWL00802 · 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 11 / 39 Long-term average 15.3 spills a year (monitored since 2020) High-spill reason (company) Performance - SW Infiltration Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 62 hours spilling →	River Derwent	38	62	up 245%	100%
Fair View Storm Sewage Overflow Overflow on sewer network EA ID / permit NWL00533 · 244/1014 Outlet location NZ1922342049 (OS grid reference) · View on Apple Maps WFD catchment Hedleyhope Burn from Source to Deerness (GB103024077290) 2024 spills / hours 24 / 131 Long-term average 25.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 62 hours spilling →	Priest Burn	18	62	down 25%	95%
Hurworth Place SPS Storm discharge at pumping station EA ID / permit NWL00721 · 254/1019 Outlet location NZ2901709813 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 5 / 1.9 Long-term average 8.3 spills a year (monitored since 2019) Monitor below 90% Comms failure / issue · Resolved - Aug Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 62 hours spilling →	River Tees	23	62	up 360%	59%
Aldin Grange CSO Overflow on sewer network EA ID / permit NWL00033 · 244/1004 Outlet location NZ2448543299 (OS grid reference) · View on Apple Maps WFD catchment Browney from Smallhope Burn Deerness confl (GB103024077551) 2024 spills / hours 41 / 153 Long-term average 29.7 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 62 hours spilling →	Unnamed Trib of River Browney	28	62	down 32%	75%
Brierdene Pumping Station Storm discharge at pumping station EA ID / permit NWL00198 · 235/1241 Outlet location NZ3596074310 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Whitley Bay 2024 spills / hours 39 / 149 Long-term average 35.7 spills a year (monitored since 2019) Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 62 hours spilling →	North Sea	28	62	down 28%	100%
Moor Lane SSO Overflow on sewer network EA ID / permit NWL00900 · 226/0454 Outlet location NZ1503072050 (OS grid reference) · View on Apple Maps WFD catchment Pont from Med Burn to Small Burn (GB103022076860) 2024 spills / hours 42 / 198 Long-term average 23.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 61 hours spilling →	Pont	24	61	down 43%	96%
Burdon Road CSO Overflow on sewer network EA ID / permit NWL00216 · 235/1279 Outlet location NZ3659561997&NZ3712562052 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 36 / 147 Long-term average 25.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 61 hours spilling →	Don Tributary	16	61	down 56%	100%
Junction of Hexham Rd & Overflow on sewer network EA ID / permit NWL00745 · 234/1159 Outlet location NZ2029062471 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 55 / 103 Long-term average 63.6 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 61 hours spilling →	Derwent (Saline Estuary)	39	61	down 29%	100%
New Mare Close Farm CSO Overflow on sewer network EA ID / permit NWL00932 · NPSWQD006839 Outlet location NZ2924974917 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 45 / 251 Long-term average 39.2 spills a year (monitored since 2013) 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 61 hours spilling →	Seaton Burn	22	61	down 51%	67%
Cutlers Hall Road (No. 29) Storm Overflow on sewer network EA ID / permit NWL00410 · EPRAB3992WX Outlet location NZ0894652307 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 35 / 238 Long-term average 15.0 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 61 hours spilling →	Backstone Beck Trib of R.Derwe	13	61	down 63%	100%
Acklam Street SPS Storm discharge at pumping station EA ID / permit NWL00021 · QR.25/04/1512 Outlet location NZ4956521392 (OS grid reference) · View on Apple Maps WFD catchment Tees (GB510302509900) 2024 spills / hours 55 / 44 Long-term average 41.7 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 61 hours spilling →	The River Tees	44	61	down 20%	100%
Brotton Millholme Drive Overflow on sewer network EA ID / permit NWL00207 · 25/06/0985 Outlet location NZ6774120260 (OS grid reference) · View on Apple Maps WFD catchment Saltburn Gill Catch trib of North Sea (GB103025071960) Bathing water Saltburn 2024 spills / hours 17 / 134 Long-term average 9.7 spills a year (monitored since 2013) 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 60 hours spilling →	Trib of Millholme Beck	9	60	down 47%	87%
Lamesley SSO Overflow on sewer network EA ID / permit NWL00770 · 235/D/0266 Outlet location NZ2520057800 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 30 / 191 Long-term average 22.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 60 hours spilling →	Team	15	60	down 50%	100%
Roman Road CSO Overflow on sewer network EA ID / permit NWL01120 · 235/1703 Outlet location NZ3334563408 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 39 / 208 Long-term average 36.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 60 hours spilling →	River Don	17	60	down 56%	99%
Bensham CSO Overflow on sewer network EA ID / permit NWL00118 · 235/1737 Outlet location NZ2360162077 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 16 / 28 Long-term average 15.6 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 60 hours spilling →	River Team Estuarine Waters	16	60	no change	99%
Stockton East CSO Overflow on sewer network EA ID / permit NWL01306 · 254/0057 Outlet location NZ4659720117 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours – / – Long-term average 13.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 60 hours spilling →	Lustrum Beck	12	60		96%
Busty Bank CSO Overflow on sewer network EA ID / permit NWL00226 · 234/0992 Outlet location NZ1765057280 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 57 / 137 Long-term average 46.4 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 60 hours spilling →	Leapmill Burn	44	60	down 23%	96%
Tame Bridge SPS Storm discharge at pumping station EA ID / permit NWL01339 · 25/04/1692 Outlet location NZ5123308208 (OS grid reference) · View on Apple Maps WFD catchment Tame from Source to Leven (GB103025071910) 2024 spills / hours 19 / 176 Long-term average 10.4 spills a year (monitored since 2015) Monitor below 90% Comms failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 59 hours spilling →	River Tame	6	59	down 68%	87%
Staindrop Sewage Treatment Works Storm tank at sewage works Sewage works Staindrop EA ID / permit NWL01271 · 25/02/1109 Outlet location NZ1430519738 (OS grid reference) · View on Apple Maps WFD catchment Langley Bk and Westholme Bk frm Sudburn Bk to Tees (GB103025072200) 2024 spills / hours 82 / 1,263 Long-term average 38.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 59 hours spilling →	Langley Beck	9	59	down 89%	100%
Norham Sewage Treatment Works Storm tank at sewage works Sewage works Norham EA ID / permit NWL00957 · 210/1328 Outlet location NT9025047620 (OS grid reference) · View on Apple Maps WFD catchment River Tweed (GB510202110000) 2024 spills / hours 145 / 2,491 Long-term average 100.2 spills a year (monitored since 2021) Monitor below 90% Sensor failure / issue · Resolved - January after reporting year Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 59 hours spilling →	River Tweed	25	59	down 83%	73%
Avenue Vivian CSO SU013 Overflow on sewer network EA ID / permit NWL00069 · 245/1375 Outlet location NZ3200750504 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Source to Herrington Burn (GB103024077580) 2024 spills / hours 31 / 89 Long-term average 22.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 59 hours spilling →	Moors Burn	23	59	down 26%	100%
Old River Tees Pumping Station Storm discharge at pumping station EA ID / permit NWL00978 · 254/1937 Outlet location NZ4685618559 (OS grid reference) · View on Apple Maps WFD catchment TEES (GB510302509900) 2024 spills / hours 33 / 65 Long-term average 33.2 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 59 hours spilling →	Old River Tees	25	59	down 24%	100%
Coach Road Est CSO Overflow on sewer network EA ID / permit NWL00302 · 235/1951 Outlet location NZ3115058340 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 45 / 156 Long-term average 28.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 59 hours spilling →	Usworth Burn	20	59	down 56%	100%
The Slack CSO Overflow on sewer network EA ID / permit NWL01374 · 242/1069 Outlet location NZ1127825407 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 17 / 22 Long-term average 17.0 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 58 hours spilling →	Grewburn Beck	20	58	up 18%	90%
Sunderland Bridge CSO Overflow on sewer network EA ID / permit NWL01325 · 243/D/0368 Outlet location NZ2654837751 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 39 / 119 Long-term average 48.4 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 58 hours spilling →	River Wear	40	58	up 3%	95%
Patton Street CSO Overflow on sewer network EA ID / permit NWL01016 · 255/1193 Outlet location NZ3828139671 (OS grid reference) · View on Apple Maps WFD catchment Castle Eden Burn from Source to North Sea (GB103025075930) 2024 spills / hours 20 / 103 Long-term average 12.8 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 58 hours spilling →	Gore Burn	11	58	down 45%	100%
Slaley STW Inlet overflow at sewage works Sewage works Slaley EA ID / permit NWL01210 · 233/1178 Outlet location NY9839957296 (OS grid reference) · View on Apple Maps WFD catchment March Burn Catchment (trib of Tyne) (GB103023075650) 2024 spills / hours 22 / 68 Long-term average 26.0 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 58 hours spilling →	Flothers Burn	42	58	up 91%	97%
Bardon Mill (Station House) P.S. Storm discharge at pumping station EA ID / permit NWL00080 · 232/0989 Outlet location NY7791064540 (OS grid reference) · View on Apple Maps WFD catchment Brackies Burn to catchment (trib of South Tyne) (GB103023075540) 2024 spills / hours 51 / 121 Long-term average 38.7 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 58 hours spilling →	Chainley Burn	40	58	down 22%	100%
Thropton SPS Storm discharge at pumping station EA ID / permit NWL01382 · 223/0980 Outlet location NU0304002240 (OS grid reference) · View on Apple Maps WFD catchment Wreigh Burn from Netherton Burn to Coquet (GB103022076601) 2024 spills / hours 41 / 439 Long-term average 20.6 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 58 hours spilling →	Wreigh Burn	13	58	down 68%	95%
International Paints SPS Storm discharge at pumping station EA ID / permit NWL00728 · 235/1751 Outlet location NZ2832262913 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 54 / 121 Long-term average 50.2 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 58 hours spilling →	River Tyne	34	58	down 37%	100%
Pity Me Sewage Treatment Works Storm tank at sewage works Sewage works Pity Me EA ID / permit NWL01038 · 245/1274 Outlet location NZ2630045940 (OS grid reference) · View on Apple Maps WFD catchment Blackdene Burn to confluence with Wear (GB103024077622) 2024 spills / hours 30 / 105 Long-term average 34.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 57 hours spilling →	Black Dene Burn	16	57	down 47%	100%
Rennys Lane Pumping Station Storm discharge at pumping station EA ID / permit NWL01103 · 245/A/0464 Outlet location NZ3106842585 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 11 / 19 Long-term average 11.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 57 hours spilling →	Pittington Beck	9	57	down 18%	100%
Front Street CSO CH68 Overflow on sewer network EA ID / permit NWL00574 · 226/1180 Outlet location NZ2653381522 (OS grid reference) · View on Apple Maps WFD catchment Blyth from Pont to Tidal Limit (GB103022077052) 2024 spills / hours 46 / 156 Long-term average 38.9 spills a year (monitored since 2013) 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 57 hours spilling →	River Blyth	32	57	down 30%	100%
Gill Cemetery CSO (SU061) Overflow on sewer network EA ID / permit NWL00588 · 245/1371 Outlet location NZ3925257487 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 45 / 110 Long-term average 27.7 spills a year (monitored since 2019) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 57 hours spilling →	Wear (Saline Estuary)	28	57	down 38%	100%
CSO WV80 Disused STW Hunwick Overflow on sewer network EA ID / permit NWL00407 · 243/0910 Outlet location NZ2000633593 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 94 / 487 Long-term average 85.7 spills a year (monitored since 2014) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 57 hours spilling →	Wear	35	57	down 63%	100%
Egglescliffe Bank CSO Overflow on sewer network EA ID / permit NWL00500 · 254/1179 Outlet location NZ4191713137 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 79 / 154 Long-term average 74.3 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 56 hours spilling →	Tees Estuary	47	56	down 41%	100%
Scout House Farm 2 CSO Overflow on sewer network EA ID / permit NWL01155 · 244/1005 Outlet location NZ2289441947 (OS grid reference) · View on Apple Maps WFD catchment Deerness from Hedleyhope Burn to Browney (GB103024077280) 2024 spills / hours 34 / 56 Long-term average 18.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 56 hours spilling →	River Deerness	30	56	down 12%	100%
Alnmouth Road SSO Overflow on sewer network EA ID / permit NWL00039 · 222/D/0255 Outlet location NU2058113181 (OS grid reference) · View on Apple Maps WFD catchment Aln from Edlingham Burn to Tidal Limit (GB103022076350) 2024 spills / hours 32 / 90 Long-term average 26.6 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 55 hours spilling →	Aln	40	55	up 25%	98%
High West Street CSO (G066) Overflow on sewer network EA ID / permit NWL00690 · 235/1927 Outlet location NZ2519163597 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 70 / 114 Long-term average 62.7 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Comms failure / issue · Resolved - Apr Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 55 hours spilling →	Tyne Estuary	43	55	down 39%	68%
Layland Bridge Pumping Station Storm discharge at pumping station EA ID / permit NWL00783 · 256/1073 Outlet location NZ6714018940 (OS grid reference) · View on Apple Maps WFD catchment Saltburn Gill Catch trib of North Sea (GB103025071960) Bathing water Saltburn 2024 spills / hours 39 / 152 Long-term average 33.9 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 55 hours spilling →	White Cross Beck	24	55	down 38%	99%
CSO Water Street Overflow on sewer network EA ID / permit NWL00404 · 235/1632 Outlet location NZ2361862898 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 45 / 152 Long-term average 39.0 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 55 hours spilling →	Tyne Estuary	26	55	down 42%	100%

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.