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
Narrowgate CSO Overflow on sewer network EA ID / permit NWL00917 · EPRAB3090RL Outlet location NU1859413477 (OS grid reference) · View on Apple Maps WFD catchment Aln from Edlingham Burn to Tidal Limit (GB103022076350) 2024 spills / hours 22 / 26 Long-term average 32.6 spills a year (monitored since 2014) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Installation set-up/design issue · Resolved - Apr Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	Unnamed Trib of River Aln	32	23	up 45%	74%
North Wylam SPS Storm discharge at pumping station EA ID / permit NWL01559 · 233/D/0206 Outlet location NZ1182064535 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 40 / 77 Long-term average 37.1 spills a year (monitored since 2014) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	River Tyne	18	23	down 55%	97%
Jnc Church Road/Dock Road Combineew Overflow on sewer network EA ID / permit NWL00737 · 210/1346 Outlet location NT9965052330 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 26 / 47 Long-term average 28.9 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Aug Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	River Tweed (Saline Estuary)	25	23	down 4%	88%
Barnard Castle STW Overflow on sewer network EA ID / permit NWL00088 · 252/A/0559 Outlet location NZ0523215935 (OS grid reference) · View on Apple Maps WFD catchment Tees from Percy Beck to River Greta (GB103025072512) 2024 spills / hours 32 / 51 Long-term average 28.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	River Tees	16	23	down 50%	99%
Vulcan Street Pump Stn Storm discharge at pumping station EA ID / permit NWL01439 · 254/1513 Outlet location NZ5028721138 (OS grid reference) · View on Apple Maps WFD catchment River Tees Estury (GB510302509900) 2024 spills / hours 6 / 20 Long-term average 6.8 spills a year (monitored since 2022) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	The River Tees	8	23	up 33%	90%
CSO to Rear of 8 Otterington Close Overflow on sewer network EA ID / permit NWL00403 · 25/05/5039 Outlet location NZ4723535060 (OS grid reference) · View on Apple Maps WFD catchment Hart Beck from Source to Sea (Hartlepool) (GB103025075880) 2024 spills / hours 25 / 36 Long-term average 18.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	Hart Beck	22	23	down 12%	94%
Hepple STW Inlet overflow at sewage works Sewage works Hepple EA ID / permit NWL00667 · 223/0995 Outlet location NT9880100399 (OS grid reference) · View on Apple Maps WFD catchment Coquet from Holystone Burn to Forest Burn (GB103022076692) 2024 spills / hours 4 / 11 Long-term average 6.6 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	River Coquet	3	23	down 25%	100%
Howle Beck Overflows (Marske Cemete Overflow on sewer network EA ID / permit NWL00715 · 25/06/1017 Outlet location NZ6417022730 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Marske Sands 2024 spills / hours 14 / 113 Long-term average 9.1 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	North Sea	2	23	down 86%	100%
Station Road CSO G020 Overflow on sewer network EA ID / permit NWL01293 · 234/1127 Outlet location NZ1693758726 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 35 / 94 Long-term average 28.0 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	Derwent	15	23	down 57%	94%
East Ford Road PS Emergency Overflo Storm discharge at pumping station Company site name EAST FORD ROAD SPS EA ID / permit NWL00480 · 225/0939 Outlet location NZ2712185936 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Bothal Burn to North Sea (GB103022077062) 2024 spills / hours 12 / 39 Long-term average 11.2 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	River Wansbeck	11	23	down 8%	100%
Klondyke CSO Overflow on sewer network EA ID / permit NWL00765 · 226/1182 Outlet location NZ2755276116 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 38 / 119 Long-term average 29.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 23 hours spilling →	Seaton Burn	25	23	down 34%	100%
Harrowgate Hill Sewage PS Storm discharge at pumping station EA ID / permit NWL00647 · 253/1276 Outlet location NZ2951017810 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 4 / 5.8 Long-term average 8.8 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 22 hours spilling →	Skerne, Tributary of	9	22	up 125%	100%
Pasture Lane CSO Overflow on sewer network EA ID / permit NWL01015 · 25/04/1776 Outlet location NZ5717720096 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 19 / 57 Long-term average 13.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Unnamed Trib of Dabholme Beck	10	22	down 47%	97%
Beverley Gardens CSO Overflow on sewer network EA ID / permit NWL00127 · NPSWQD009328 Outlet location NZ2780250303 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 13 / 18 Long-term average 12.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	River Wear	20	22	up 54%	100%
Grange Park CSO (WK016) Overflow on sewer network EA ID / permit NWL00602 · 226/1265 Outlet location NZ2824083613 (OS grid reference) · View on Apple Maps WFD catchment Sleek Burn to Tidal Limit (GB510302203200) 2024 spills / hours 23 / 38 Long-term average 72.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	The Sleek Burn	21	22	down 9%	98%
Eglingham STW Inlet overflow at sewage works Sewage works Eglingham EA ID / permit NWL00502 · 222/0043 Outlet location NU1140718901 (OS grid reference) · View on Apple Maps WFD catchment Eglingham Burn from Source to Shipley Burn (GB103022076390) 2024 spills / hours 14 / 68 Long-term average 10.0 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Eglingham Burn	11	22	down 21%	100%
Point A Damside CSO CM022 Overflow on sewer network EA ID / permit NWL01042 · 225/1064 Outlet location NZ2013386105 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Font to Bothal Burn (GB103022077061) 2024 spills / hours 21 / 51 Long-term average 25.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Cotting Burn	22	22	up 5%	99%
Ogle Sewage Treatment Works Storm tank at sewage works Sewage works Ogle EA ID / permit NWL00975 · 226/0141 Outlet location NZ1401878610 (OS grid reference) · View on Apple Maps WFD catchment Ogle Burn Catchment (trib of Blyth) (GB103022076900) 2024 spills / hours 47 / 618 Long-term average 18.0 spills a year (monitored since 2021) Investigation Operational investigation completed Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Ogle Burn	5	22	down 89%	100%
Brandywell CSO Overflow on sewer network EA ID / permit NWL00188 · 210/1359 Outlet location NT9999851990 (OS grid reference) · View on Apple Maps WFD catchment Tweed water body (GB510202110000) Bathing water Spittal 2024 spills / hours 43 / 47 Long-term average 36.4 spills a year (monitored since 2014) High-spill reason (company) Not asset maintenance - Hydraulic capacity Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	River Tweed (Saline Estuary)	40	22	down 7%	97%
North Gosforth CSO Overflow on sewer network EA ID / permit NWL00960 · 226/1253 Outlet location NZ2487072379 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 25 / 64 Long-term average 23.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Seaton Burn	13	22	down 48%	99%
Local Avenue Overflow on sewer network EA ID / permit NWL00800 · 245/1203 Outlet location NZ3321042420 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 13 / 30 Long-term average 13.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	Coldwell Burn	17	22	up 31%	97%
Neasham Ejector Station SPS Storm discharge at pumping station EA ID / permit NWL00918 · 254/E/0204 Outlet location NZ3264610173 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 0 / 0.0 Long-term average 13.0 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Resolved - Sep Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 22 hours spilling →	Tees	6	22	up from 0	74%
Glaxo West CSO Overflow on sewer network EA ID / permit NWL00593 · 225/1025 Outlet location NZ2900185382 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Bothal Burn to North Sea (GB103022077062) 2024 spills / hours 27 / 55 Long-term average 30.8 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	River Wansbeck (Saline Estuar)	23	22	down 15%	98%
New Coatham CSO Ref L73 Overflow on sewer network EA ID / permit NWL00930 · 256/1065 Outlet location NZ5981225474 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Redcar Coatham 2024 spills / hours 15 / 33 Long-term average 16.4 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 22 hours spilling →	North Sea	9	22	down 40%	100%
Newport Road CSO Overflow on sewer network EA ID / permit NWL00951 · 254/1863 Outlet location NZ4791719967 (OS grid reference) · View on Apple Maps WFD catchment TEES (GB510302509900) 2024 spills / hours 43 / 41 Long-term average 36.8 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 22 hours spilling →	River Tees Estuary	40	22	down 7%	98%
Station Road CSO Overflow on sewer network EA ID / permit NWL01289 · 233/1253 Outlet location NY9887064090 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 25 / 157 Long-term average 11.6 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 21 hours spilling →	Tyne	4	21	down 84%	99%
Ovington STW Inlet overflow at sewage works Sewage works Ovington EA ID / permit NWL00996 · 252/0366 Outlet location NZ1330315050 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 8 / 6.0 Long-term average 7.6 spills a year (monitored since 2021) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 21 hours spilling →	Tees	21	21	up 163%	72%
Pity Me Roundabout CSO Overflow on sewer network EA ID / permit NWL01037 · 245/1354 Outlet location NZ2639045940 (OS grid reference) · View on Apple Maps WFD catchment Blackdene Burn to confluence with Wear (GB103024077622) 2024 spills / hours 16 / 26 Long-term average 20.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 21 hours spilling →	Pity Me Beck	12	21	down 25%	96%
Alnwick Castle CSO No 2 A035 Overflow on sewer network EA ID / permit NWL00041 · 222/0827 Outlet location NU1913913618 (OS grid reference) · View on Apple Maps WFD catchment Aln from Edlingham Burn to Tidal Limit (GB103022076350) 2024 spills / hours 14 / 11 Long-term average 19.6 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 21 hours spilling →	River Aln	28	21	up 100%	100%
Houghton Le Spring CSO Overflow on sewer network EA ID / permit NWL00708 · EPRBB3899VA Outlet location NZ3336752470 (OS grid reference) · View on Apple Maps WFD catchment Herrington Burn from Source to Lumley Park Burn (GB103024077630) 2024 spills / hours 31 / 54 Long-term average 33.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 21 hours spilling →	Trib of River Wear	2	21	down 94%	100%
Chapel Street CSO Overflow on sewer network Company site name BARRINGTON STREET EA ID / permit NWL00268 · 243/0930 Outlet location NZ2036030850 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 24 / 30 Long-term average 24.0 spills a year (monitored since 2013) Monitor below 90% Installation set-up/design issue · Resolved - Sep Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	Wear Trib	22	20	down 8%	67%
Craster North SPS Storm discharge at pumping station EA ID / permit NWL00342 · 221/0921 Outlet location NU2588820091 (OS grid reference) · View on Apple Maps WFD catchment Northumberland South (GB650301500001) 2024 spills / hours 22 / 94 Long-term average 38.0 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	The North Sea	12	20	down 45%	100%
248 Geneva Road CSO Overflow on sewer network EA ID / permit NWL00004 · Permit applied for Outlet location NZ3069012933 (OS grid reference) · View on Apple Maps WFD catchment Neasham Stell Catchment (trib of Tees) (GB103025072160) 2024 spills / hours 3 / 8.0 Long-term average 3.2 spills a year (monitored since 2014) Monitor below 90% Comms failure / issue · Resolved - Dec Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 20 hours spilling →	Cree Beck into Kent Beck	5	20	up 67%	81%
Holy Island STW Inlet overflow at sewage works Sewage works Holy Island EA ID / permit NWL00698 · 221/1016 Outlet location NU1413041940 (OS grid reference) · View on Apple Maps WFD catchment Northumberland North (GB650301440000) 2024 spills / hours 18 / 74 Long-term average 16.0 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 20 hours spilling →	North Sea	9	20	down 50%	100%
Stephenson Way SPS Storm discharge at pumping station EA ID / permit NWL00071 · 25/03/1243 Outlet location NZ2910823663 (OS grid reference) · View on Apple Maps WFD catchment Skerne form Woodham Burn to Demons Beck (GB103025072391) 2024 spills / hours 3 / 15 Long-term average 11.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	River Skerne	5	20	up 67%	100%
West End CSO Overflow on sewer network EA ID / permit NWL01257 · 210/0939 Outlet location NT9945052750 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 14 / 21 Long-term average 16.1 spills a year (monitored since 2013) Monitor below 90% Sensor failure / issue · Resolved - Mar Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	Tweed Estuary (ESTUARY0	19	20	up 36%	83%
Blanchland STW Storm tank at sewage works Sewage works Blanchland EA ID / permit NWL00152 · 234/1069 Outlet location NY9689750307 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Nookton Burn to Burnhope Burn (GB103023074770) 2024 spills / hours 23 / 91 Long-term average 19.3 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	River Derwent	5	20	down 78%	100%
Gray Lane Storm Sewage Overflow Overflow on sewer network EA ID / permit NWL00609 · 252/1053 Outlet location NZ0491015990 (OS grid reference) · View on Apple Maps WFD catchment Tees from Percy Beck to River Greta (GB103025072512) 2024 spills / hours 30 / 47 Long-term average 23.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	Tees	22	20	down 27%	100%
Sedgeletch Bridge CSO Overflow on sewer network EA ID / permit NWL01174 · 245/1377 Outlet location NZ3256050720 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Source to Herrington Burn (GB103024077580) 2024 spills / hours 19 / 34 Long-term average 22.1 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 20 hours spilling →	Moors Burn	17	20	down 11%	100%
Scotch Isle Farm CSO Overflow on sewer network EA ID / permit NWL01145 · 241/1120 Outlet location NZ0898536517 (OS grid reference) · View on Apple Maps WFD catchment Wear from Middlehope Burn to Houselop Beck (GB103024077461) 2024 spills / hours 19 / 40 Long-term average 24.0 spills a year (monitored since 2016) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Unnamed Trib of River Wear	16	19	down 16%	100%
Caldbeck Cl Belmont St Anthonys CSO Overflow on sewer network EA ID / permit NWL00237 · 235/1324 Outlet location NZ2890162949 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 29 / 34 Long-term average 31.1 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	River Tyne Estuary	23	19	down 21%	100%
Glentower Grove SPS Storm discharge at pumping station EA ID / permit NWL00595 · 255/5046 Outlet location NZ5174029895 (OS grid reference) · View on Apple Maps WFD catchment Culverted Watercourse to North Sea (GB650301500005) Bathing water Seaton Carew North 2024 spills / hours 3 / 19 Long-term average 2.4 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Trib North Sea (at Carr House)	3	19	no change	100%
Eppleby Combined Sewer Overflow Overflow on sewer network EA ID / permit NWL00518 · 252/1129 Outlet location NZ1810013100 (OS grid reference) · View on Apple Maps WFD catchment Aldbrough Beck from Source to Clow Beck (GB103025072150) 2024 spills / hours 13 / 47 Long-term average 10.0 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 19 hours spilling →	Forcett Beck	10	19	down 23%	100%
Castleton Walk CSO Overflow on sewer network EA ID / permit NWL00256 · 254/1418 Outlet location NZ4470715956 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 12 / 16 Long-term average 10.5 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Tees	12	19	no change	97%
Wallridge Sewage Disposal Works Storm tank at sewage works Sewage works Wallridge EA ID / permit NWL01447 · 226/0150 Outlet location NZ0590076400 (OS grid reference) · View on Apple Maps WFD catchment Coldcoats Burn Catchment (trib of Pont) (GB103022076890) 2024 spills / hours 20 / 54 Long-term average 20.3 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Cleugh Burn	10	19	down 50%	100%
Blackett Street Overflow on sewer network EA ID / permit NWL00146 · 235/1181 Outlet location NZ3172065830 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 31 / 90 Long-term average 27.2 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Tyne Estuary	11	19	down 65%	100%
Barnard Castle STW Inlet overflow at sewage works Sewage works Barnard Castle EA ID / permit NWL00087 · 25/02/1111 Outlet location NZ0582015460 (OS grid reference) · View on Apple Maps WFD catchment Tees from Percy Beck to River Greta (GB103025072512) 2024 spills / hours 16 / 52 Long-term average 11.7 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	River Tees	6	19	down 63%	100%
Edinburgh Drive CSO Overflow on sewer network EA ID / permit NWL00497 · 253/1076 Outlet location NZ2634713714 (OS grid reference) · View on Apple Maps WFD catchment Tees from River Greta to River Skerne (GB103025072190) 2024 spills / hours 5 / 12 Long-term average 5.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 19 hours spilling →	Tees Tributary	7	19	up 40%	95%
Darlington CSO Overflow on sewer network EA ID / permit NWL00420 · Permit applied for Outlet location NZ4309417998 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 23 / 21 Long-term average 19.5 spills a year (monitored since 2020) Monitor below 90% Comms failure / issue · Resolved - Feb Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 19 hours spilling →	Lustrum Beck	16	19	down 30%	90%
Westbourne Drive CSO Overflow on sewer network EA ID / permit NWL01499 · 245/1366 Outlet location NZ3260252299 (OS grid reference) · View on Apple Maps WFD catchment Herrington Burn from Source to Lumley Park Burn (GB103024077630) 2024 spills / hours 25 / 37 Long-term average 20.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 18 hours spilling →	Herrington Burn	17	18	down 32%	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.