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
Heaton CSO Cornel Rd Overflow on sewer network EA ID / permit NWL00661 · EPRCB3192VE Outlet location NZ2902666550 (OS grid reference) · View on Apple Maps WFD catchment Wallsend Burn (Trib of Tyne) (GB103023075760) 2024 spills / hours 28 / 41 Long-term average 28.0 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 37 hours spilling →	Wallsend Burn	35	37	up 25%	99%
High Spen SPS Storm discharge at pumping station EA ID / permit NWL00686 · 233/1162 Outlet location NZ1403660565 (OS grid reference) · View on Apple Maps WFD catchment Blaydon Burn (GB103023074791) 2024 spills / hours 22 / 5.1 Long-term average 33.7 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 37 hours spilling →	Barlow Burn	33	37	up 50%	97%
West Boldon CSO (No 4) Overflow on sewer network EA ID / permit NWL01478 · 235/F/0614 Outlet location NZ3586962022 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 58 / 161 Long-term average 65.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 37 hours spilling →	Don	18	37	down 69%	96%
Bank Top CSO Overflow on sewer network EA ID / permit NWL00078 · 226/1181 Outlet location NZ2778382259 (OS grid reference) · View on Apple Maps WFD catchment River Blyth (GB510302203200) 2024 spills / hours 41 / 96 Long-term average 41.3 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	River Blyth	26	36	down 37%	100%
Mary Magdalene NO3 CSO (TD037) Overflow on sewer network EA ID / permit NWL00857 · 233/1250 Outlet location NZ0927463327 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 50 / 106 Long-term average 45.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 36 hours spilling →	Unnamed Trib of River Tyne	21	36	down 58%	96%
Teesdale Avenue CSO Overflow on sewer network EA ID / permit NWL01349 · 254/1836 Outlet location NZ4522122938 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Brierley Beck to Tees Es (GB103025076010) 2024 spills / hours 24 / 43 Long-term average 16.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Billingham Beck	15	35	down 38%	96%
South Benwell Road CSO Overflow on sewer network EA ID / permit NWL01220 · 235/1958 Outlet location NZ2138063404 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 36 / 76 Long-term average 30.8 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	River Tyne	17	35	down 53%	100%
East Terrace CSO Overflow on sewer network EA ID / permit NWL00489 · 255/1190 Outlet location NZ4435037890 (OS grid reference) · View on Apple Maps WFD catchment Crimdon Beck from Source to Sea (GB103025075910) 2024 spills / hours 22 / 73 Long-term average 12.2 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Trib. of Heads Hope Burn	15	35	down 32%	94%
Dormer Way PS Overflow on sewer network EA ID / permit NWL00453 · 254/1808 Outlet location NZ5242120275 (OS grid reference) · View on Apple Maps WFD catchment Normanby Beck to River Tees (GB510302509900) 2024 spills / hours 4 / 15 Long-term average 1.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Normanby Beck	6	35	up 50%	100%
Old Yarm SPS Storm discharge at pumping station EA ID / permit NWL00981 · 254/1092 Outlet location NZ4040911617 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 30 / 342 Long-term average 22.3 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	River Tees	6	35	down 80%	99%
Wincomblee Road CSO Overflow on sewer network EA ID / permit NWL01532 · 235/1759 Outlet location NZ2981264400 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 37 / 72 Long-term average 30.2 spills a year (monitored since 2019) Monitor below 90% Comms failure / issue · Resolved - Jul Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	River Tyne Saline Estuary	29	35	down 22%	66%
66 Ross Lea CSO Overflow on sewer network EA ID / permit NWL00011 · 245/1370 Outlet location NZ3235051888 (OS grid reference) · View on Apple Maps WFD catchment Herrington Burn from Source to Lumley Park Burn (GB103024077630) 2024 spills / hours 32 / 72 Long-term average 31.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 35 hours spilling →	Herrington Burn	17	35	down 47%	100%
Springwell Park CSO Overflow on sewer network EA ID / permit NWL01256 · 235/1704 Outlet location NZ3295164058 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 24 / 74 Long-term average 24.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	Monkton Burn	16	34	down 33%	97%
Halton Lea Gate CSO Overflow on sewer network EA ID / permit NWL00638 · 232/G/0063 Outlet location NY6553558679 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Black Burn to Tipalt Burn (GB103023075531) 2024 spills / hours 13 / 29 Long-term average 18.8 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	Black Burn, Tributary of	21	34	up 62%	100%
Victoria Rd at Sandown Gardens CSO Overflow on sewer network EA ID / permit NWL01428 · 235/1933 Outlet location NZ2414661344 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 27 / 40 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 34 hours spilling →	Team	22	34	down 19%	99%
NO2 Eskdale Gardens CSO Overflow on sewer network EA ID / permit NWL00956 · 235/1442 Outlet location NZ2580559497 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 47 / 82 Long-term average 44.3 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity Monitor below 90% Power failure / issue · Resolved - Feb Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 34 hours spilling →	Team	35	34	down 26%	67%
Bowsden STW Inlet overflow at sewage works Sewage works Bowsden EA ID / permit NWL00389 · 210/0038 Outlet location NT9973941917 (OS grid reference) · View on Apple Maps WFD catchment South Low from Source to Haggerston Bridge (GB103021073221) 2024 spills / hours 34 / 49 Long-term average 49.0 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 34 hours spilling →	Bowsden	42	34	up 24%	100%
Fernie Road CSO Overflow on sewer network EA ID / permit NWL00548 · QR.25/06/0976 Outlet location NZ6114915290 (OS grid reference) · View on Apple Maps WFD catchment Skelton Beck Catch (Saltburn) trib of North Sea (GB103025071970) 2024 spills / hours 18 / 92 Long-term average 7.7 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Chapel Beck	7	33	down 61%	99%
Seaham Road CSO SU35 Overflow on sewer network EA ID / permit NWL01165 · 245/1363 Outlet location NZ3481149956 (OS grid reference) · View on Apple Maps WFD catchment Lumley Park Burn from Source to Herrington Burn (GB103024077580) 2024 spills / hours 34 / 84 Long-term average 35.7 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Houghton Burn	15	33	down 56%	97%
Pallion Pumping Station Storm discharge at pumping station EA ID / permit NWL01003 · 245/1210 Outlet location NZ3770057990 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 50 / 77 Long-term average 55.3 spills a year (monitored since 2013) High-spill reason (company) Not asset maintenance - Hydraulic capacity 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 33 hours spilling →	River Wear (Saline Estuary)	31	33	down 38%	75%
The Stray Storm Retention Tank Overflow on sewer network EA ID / permit NWL01376 · 25/06/1016 Outlet location NZ6367022940 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Marske Sands 2024 spills / hours 12 / 98 Long-term average 5.7 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	North Sea	5	33	down 58%	95%
Mclaren Drive CSO Overflow on sewer network EA ID / permit NWL00864 · 221/1003 Outlet location NU1121033610 (OS grid reference) · View on Apple Maps WFD catchment Belford Burn from Source to Ross Low (GB103022076460) 2024 spills / hours 31 / 112 Long-term average 26.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Belford Burn (Coastal Stream)	23	33	down 26%	100%
Riverside CSO Overflow on sewer network EA ID / permit NWL01114 · 242/1043 Outlet location NZ2174028658 (OS grid reference) · View on Apple Maps WFD catchment Wear from Middlehope Burn to Houselop Beck (GB103024077461) 2024 spills / hours 9 / 74 Long-term average 51.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Coundon Burn	6	33	down 33%	100%
Willington System CSO Overflow on sewer network EA ID / permit NWL01528 · 243/D/0393 Outlet location NZ1900031900 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 24 / 48 Long-term average 28.3 spills a year (monitored since 2013) High-spill reason (company) Performance - SW Infiltration Investigation Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 33 hours spilling →	Wear, Tributary of	32	33	up 33%	99%
Scremerston No 1 SPS Storm discharge at pumping station EA ID / permit NWL01156 · 210/0880 Outlet location NU0091548309 (OS grid reference) · View on Apple Maps WFD catchment Northumberland North (GB650301440000) 2024 spills / hours 28 / 112 Long-term average 20.8 spills a year (monitored since 2020) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 33 hours spilling →	Doupster Burn	18	33	down 36%	100%
The Hagg CSO Overflow on sewer network EA ID / permit NWL01362 · 251/0862 Outlet location NZ0110219888 (OS grid reference) · View on Apple Maps WFD catchment Balder Catchment (trib of Tees) (GB103025072240) 2024 spills / hours 45 / 164 Long-term average 34.4 spills a year (monitored since 2013) Monitor below 90% Capital / maintenance works affect EDM operation · Resolved - Apr Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 33 hours spilling →	Trib of River Balder	25	33	down 44%	87%
Smith Street Pumping Station Storm discharge at pumping station EA ID / permit NWL01214 · 235/1652 Outlet location NZ3534566008 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 18 / 156 Long-term average 9.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Tyne Saline Estuary	5	32	down 72%	100%
New Road CSO Overflow on sewer network EA ID / permit NWL00936 · 235/1572 Outlet location NZ3543562358 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 25 / 82 Long-term average 19.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Don	10	32	down 60%	100%
Chilton Lane A CSO Overflow on sewer network EA ID / permit NWL00277 · 253/1097 Outlet location NZ3044931749 (OS grid reference) · View on Apple Maps WFD catchment Carrs from Source to Skerne (GB103025072520) 2024 spills / hours 5 / 14 Long-term average 27.2 spills a year (monitored since 2017) Monitor below 90% Sensor failure / issue · Resolved - Apr Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Trib of the Carrs Rvr Skerne	29	32	up 480%	81%
Pithouse Lane CSO (West Rainton 5) Overflow on sewer network EA ID / permit NWL01035 · EPRGB3599NT Outlet location NZ3011646522 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 51 / 238 Long-term average 38.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 32 hours spilling →	Unnamed Trib of River Wear	5	32	down 90%	100%
Harwal Road CSO (Ref. L16) Overflow on sewer network EA ID / permit NWL00652 · 25/04/1782 Outlet location NZ5905024858 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 23 / 67 Long-term average 19.6 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Fleet Beck	16	32	down 30%	97%
East of Knitsley Grange Farm CSO Overflow on sewer network EA ID / permit NWL00485 · 244/0997 Outlet location NZ1223548250 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 39 / 91 Long-term average 32.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Smallhope Burn	18	32	down 54%	99%
Chilton Lane SSO Overflow on sewer network EA ID / permit NWL00278 · 253/1098 Outlet location NZ3063031200 (OS grid reference) · View on Apple Maps WFD catchment Carrs from Source to Skerne (GB103025072520) 2024 spills / hours 23 / 45 Long-term average 28.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 32 hours spilling →	Mainsforth Stell	16	32	down 30%	100%
50 Woodside Gardens CSO Overflow on sewer network EA ID / permit NWL00010 · 245/1309 Outlet location NZ2095551570 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 20 / 71 Long-term average 17.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Stanley Burn Trib	13	31	down 35%	91%
Embleton Sewage Works CSO Inlet overflow at sewage works Sewage works Embleton EA ID / permit NWL00517 · 221/G/0336 Outlet location NU2332021860 (OS grid reference) · View on Apple Maps WFD catchment Embleton Burn form Source to N Sea (GB103022076370) 2024 spills / hours 40 / 65 Long-term average 34.8 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 31 hours spilling →	Embleton Burn	22	31	down 45%	100%
Bowesfield Lane CSO Overflow on sewer network EA ID / permit NWL00181 · 254/1266 Outlet location NZ4467816863 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 41 / 98 Long-term average 18.8 spills a year (monitored since 2018) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	River Tees Estuary (Saline)	15	31	down 63%	100%
Bridge Street SPS Storm discharge at pumping station EA ID / permit NWL00197 · 25/05/5040 Outlet location NZ5180032508 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) 2024 spills / hours 25 / 57 Long-term average 23.0 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	North Sea	10	31	down 60%	100%
Drysdale Cresent CSO Overflow on sewer network EA ID / permit NWL00456 · 226/1252 Outlet location NZ2359172978 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 12 / 20 Long-term average 9.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Hartley Burn	5	31	down 58%	95%
Lyne CSO CM045 Overflow on sewer network EA ID / permit NWL00828 · 224/0999 Outlet location NZ2866791593 (OS grid reference) · View on Apple Maps WFD catchment River Lyne (GB650301500001) 2024 spills / hours 36 / 167 Long-term average 39.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 31 hours spilling →	Lyne	6	31	down 83%	100%
East Boldon CSO No 6 Overflow on sewer network EA ID / permit NWL00476 · 235/F/0616 Outlet location NZ3732361344 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 46 / 69 Long-term average 37.8 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 30 hours spilling →	Don	38	30	down 17%	100%
Ferryhill North SPS Storm discharge at pumping station EA ID / permit NWL00550 · 243/0978 Outlet location NZ2844333428 (OS grid reference) · View on Apple Maps WFD catchment Croxdale Beck from Source to Wear (GB103024077410) 2024 spills / hours 30 / 37 Long-term average 36.3 spills a year (monitored since 2013) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	East Howle Beck	31	30	up 3%	100%
Car Park CSO Overflow on sewer network EA ID / permit NWL00243 · 210/1344 Outlet location NU0018151930 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 37 / 79 Long-term average 31.4 spills a year (monitored since 2015) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	River Tweed (Saline Estuary)	25	30	down 32%	97%
Neasham Road CSO (Y5) Overflow on sewer network EA ID / permit NWL00920 · EPRMB3892AA Outlet location NZ2912514232 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 31 / 34 Long-term average 24.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 30 hours spilling →	River Skerne	29	30	down 6%	92%
Scotswood Road NO3 SPS Storm discharge at pumping station EA ID / permit NWL01150 · 235/1668 Outlet location NZ1970863917 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 33 / 36 Long-term average 26.6 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	River Tyne	23	30	down 30%	100%
Hepscott Sewage Treatment Works Storm tank at sewage works Sewage works Hepscott EA ID / permit NWL00668 · 226/1281 Outlet location NZ2294583795 (OS grid reference) · View on Apple Maps WFD catchment Sleek Burn / Hepscott Burn Source to Tidal Limit (GB103022076230) 2024 spills / hours 24 / 106 Long-term average 32.3 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	Hepscott Burn	17	30	down 29%	100%
Tool Hire CSO Overflow on sewer network EA ID / permit NWL01393 · 244/0996 Outlet location NZ1944242114 (OS grid reference) · View on Apple Maps WFD catchment Hedleyhope Burn from Source to Deerness (GB103024077290) 2024 spills / hours 44 / 222 Long-term average 35.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	Priest Burn	3	30	down 93%	95%
Darlington Crown Street No 34 CSO Overflow on sewer network EA ID / permit NWL00419 · EPRCB3095WD Outlet location NZ2914214533 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 15 / 30 Long-term average 12.4 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 30 hours spilling →	River Skerne	11	30	down 27%	100%
Steppey Lane CSO A020 Overflow on sewer network EA ID / permit NWL01302 · 222/0860 Outlet location NU2373410923 (OS grid reference) · View on Apple Maps WFD catchment Hip Burn to River Aln (GB510302203300) 2024 spills / hours 31 / 47 Long-term average 13.3 spills a year (monitored since 2013) High-spill reason (company) Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	Hips Burn	34	30	up 10%	100%
White House Road 1+2 CSO Overflow on sewer network EA ID / permit NWL01515 · 254/1823 Outlet location NZ4515024010 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Brierley Beck to Tees Es (GB103025076010) 2024 spills / hours 36 / 67 Long-term average 34.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 30 hours spilling →	Thorpe Beck, Trib of Bill.Beck	29	30	down 19%	99%
33 Dock Road CSO Overflow on sewer network EA ID / permit NWL00007 · 210/1345 Outlet location NT9973552213 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 39 / 76 Long-term average 36.8 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 30 hours spilling →	River Tweed (Saline Estuary)	28	30	down 28%	96%

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.