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
Windmill Cottage CSO the Mill TE066 Overflow on sewer network EA ID / permit NWL01534 · 252/1125 Outlet location NZ0151019565 (OS grid reference) · View on Apple Maps WFD catchment Tees from Maize Beck to Percy Beck (GB103025072511) 2024 spills / hours 21 / 43 Long-term average 15.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 3.9 hours spilling →	Unnamed Trib of Lance Beck	7	3.9	down 67%	100%
Millhouse Farm CSO Overflow on sewer network EA ID / permit NWL00894 · 244/0917 Outlet location NZ1177043450 (OS grid reference) · View on Apple Maps WFD catchment Browney from Source to Pan Burn (GB103024077310) 2024 spills / hours 9 / 7.3 Long-term average 10.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.9 hours spilling →	Steeley Burn	14	3.9	up 56%	100%
Bourn Lea CSO CH087 Overflow on sewer network EA ID / permit NWL00175 · 245/1376 Outlet location NZ3238851928 (OS grid reference) · View on Apple Maps WFD catchment Herrington Burn from Source to Lumley Park Burn (GB103024077630) 2024 spills / hours 8 / 16 Long-term average 7.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.7 hours spilling →	Herrington Burn	5	3.7	down 38%	99%
Colwell STW Inlet overflow at sewage works Sewage works Colwell EA ID / permit NWL00310 · 231/1077 Outlet location NY9538575002 (OS grid reference) · View on Apple Maps WFD catchment Barrasford Burn Catchment (trib of N Tyne) (GB103023074890) 2024 spills / hours 25 / 328 Long-term average 28.6 spills a year (monitored since 2021) Monitor below 90% Comms failure / issue · Resolved - Dec Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.7 hours spilling →	Coal Burn	8	3.7	down 68%	84%
Rose Terrace CSO Overflow on sewer network EA ID / permit NWL01126 · 241/1089 Outlet location NY9917239203 (OS grid reference) · View on Apple Maps WFD catchment Wear from Middlehope Burn to Houselop Beck (GB103024077461) 2024 spills / hours 14 / 6.9 Long-term average 10.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.7 hours spilling →	River Wear	12	3.7	down 14%	91%
22 Woodford CSO Overflow on sewer network EA ID / permit NWL01544 · 235/1520 Outlet location NZ2543758543 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 14 / 5.0 Long-term average 38.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.7 hours spilling →	Team Trib	26	3.7	up 86%	91%
Hall Farm CSO (SE037) Overflow on sewer network EA ID / permit NWL00637 · 243/0993 Outlet location NZ2234334492 (OS grid reference) · View on Apple Maps WFD catchment Wear from Gaunless to Browney (GB103024077464) 2024 spills / hours 7 / 6.0 Long-term average 11.6 spills a year (monitored since 2013) Monitor below 90% Power failure / issue · Resolved - Sep Investigation Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 3.7 hours spilling →	Wear Tributary	9	3.7	up 29%	89%
Elwick SPS Storm discharge at pumping station EA ID / permit NWL00514 · 254/1076 Outlet location NZ4568132123 (OS grid reference) · View on Apple Maps WFD catchment Greatham Beck Catchment (trib of Tidal Tees) (GB103025076030) 2024 spills / hours 13 / 6.0 Long-term average 7.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.6 hours spilling →	Char Beck	13	3.6	no change	99%
Netherton CSO Overflow on sewer network EA ID / permit NWL00927 · 223/0872 Outlet location NT9897807531 (OS grid reference) · View on Apple Maps WFD catchment Netherton Burn Catch (trib of Wreigh Burn) (GB103022076750) 2024 spills / hours 17 / 20 Long-term average 12.3 spills a year (monitored since 2019) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.6 hours spilling →	Netherton Burn	13	3.6	down 24%	99%
Newbiggin SSO (Wilkie Terrace) Overflow on sewer network EA ID / permit NWL00942 · 224/0881 Outlet location NZ3163287760 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 13 / 104 Long-term average 7.5 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 3.5 hours spilling →	North Sea	3	3.5	down 77%	100%
CSO at Sw Corner of Allotment Garde Overflow on sewer network Company site name CSO AT HEBBURN RIVERSIDE EA ID / permit NWL00380 · 235/1187 Outlet location NZ2996963711 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 5 / 7.0 Long-term average 5.8 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 3.5 hours spilling →	Tyne Estuary	4	3.5	down 20%	100%
Rear of Raby Road Storm Sewage Over Overflow on sewer network EA ID / permit NWL01092 · 252/1123 Outlet location NZ0460016730 (OS grid reference) · View on Apple Maps WFD catchment Tees from Percy Beck to River Greta (GB103025072512) 2024 spills / hours 3 / 5.8 Long-term average 1.8 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.4 hours spilling →	Tees	1	3.4	down 67%	99%
Seymour Crescent CSO Overflow on sewer network EA ID / permit NWL01179 · 254/1824 Outlet location NZ4118413610 (OS grid reference) · View on Apple Maps WFD catchment Tees from Skerne to Tidal Limit (GB103025072595) 2024 spills / hours 11 / 3.1 Long-term average 10.7 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 3.4 hours spilling →	Nelly Burdon'S Beck	7	3.4	down 36%	100%
50 Oxclose Crescent Spennymoor Overflow on sewer network EA ID / permit NWL01568 · EPRZB3792ET Outlet location NZ2558834626 (OS grid reference) · View on Apple Maps WFD catchment Valley Burn from Source to Wear (GB103024077350) 2024 spills / hours 11 / 5.8 Long-term average 13.0 spills a year (monitored since 2023) Monitor below 90% Comms failure / issue · Resolved - Apr Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.4 hours spilling →	Valley Burn	17	3.4	up 55%	88%
Sundial Place CSO Overflow on sewer network EA ID / permit NWL01328 · 25/04/1604 Outlet location NZ3614621382 (OS grid reference) · View on Apple Maps WFD catchment Bishopton Beck from Source to Billingham Beck (GB103025072280) 2024 spills / hours 10 / 4.8 Long-term average 10.5 spills a year (monitored since 2013) 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 3.3 hours spilling →	Bishopton Beck	11	3.3	up 10%	89%
Wellington Lane Pumping Station Storm discharge at pumping station EA ID / permit NWL01474 · 245/1211 Outlet location NZ3890258135 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 14 / 17 Long-term average 18.9 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.3 hours spilling →	River Wear (Saline Estuary)	6	3.3	down 57%	95%
Derwenthaugh Road CSO Overflow on sewer network EA ID / permit NWL00977 · 234/0904 Outlet location NZ1983562379 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 8 / 11 Long-term average 14.4 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 3.3 hours spilling →	River Derwent (Tidal)	4	3.3	down 50%	98%
Mcclean Avenue CSO (Ref No L15) Overflow on sewer network Company site name ESKDALE ROAD CSO EA ID / permit NWL00863 · 254/1916 Outlet location NZ5855024380 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 3 / 3.3 Long-term average 4.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.2 hours spilling →	Fleet Beck Trib	4	3.2	up 33%	99%
Stony Row CSO Overflow on sewer network EA ID / permit NWL01316 · 235/1532 Outlet location NZ2340354074 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 11 / 9.3 Long-term average 21.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.2 hours spilling →	Urpeth Burn	10	3.2	down 9%	99%
CSO at Rear of Holly House Overflow on sewer network EA ID / permit NWL00376 · 25/05/5038 Outlet location NZ4916032011 (OS grid reference) · View on Apple Maps WFD catchment Burn Vally Gardens (GB650301500005) 2024 spills / hours 9 / 4.3 Long-term average 3.1 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.1 hours spilling →	Stream Trib of Hartlepool Bay	4	3.1	down 56%	96%
Tuthill Stairs CSO Overflow on sewer network EA ID / permit NWL01412 · 235/1922 Outlet location NZ2501463647 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 24 / 8.2 Long-term average 18.4 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 3.1 hours spilling →	River Tyne	15	3.1	down 38%	97%
Woodborough Lane CSO Overflow on sewer network EA ID / permit NWL01542 · 25/04/1607 Outlet location NZ4293320382 (OS grid reference) · View on Apple Maps WFD catchment Lustrum Beck Catchment (trib of Tees) (GB103025072550) 2024 spills / hours 3 / 1.8 Long-term average 3.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.1 hours spilling →	Elm Tree Beck	2	3.1	down 33%	99%
Burnip Road CSO Overflow on sewer network EA ID / permit NWL00219 · 255/0509 Outlet location NZ3920147770 (OS grid reference) · View on Apple Maps WFD catchment Dalton Beck to North Sea (GB103025075970) Bathing water Seaham Hall Beach 2024 spills / hours 11 / 9.2 Long-term average 15.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.1 hours spilling →	Dalton Dene	9	3.1	down 18%	95%
Vindomora Villas CSO Overflow on sewer network EA ID / permit NWL01430 · 234/1155 Outlet location NZ1052155764 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 16 / 19 Long-term average 14.3 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 3.1 hours spilling →	Blackstone Burn River Derwent	8	3.1	down 50%	100%
Vinovium Ssos A17, A18, A19 & A21 Overflow on sewer network EA ID / permit NWL01437 · 242/C/0375 Outlet location NZ2132828289 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Hummer Beck to Wear (GB103024072730) 2024 spills / hours 10 / 3.3 Long-term average 12.0 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.1 hours spilling →	Gaunless	15	3.1	up 50%	90%
Scorers Lane CSO Overflow on sewer network EA ID / permit NWL01144 · 245/1307 Outlet location NZ2955049740 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 6 / 10 Long-term average 5.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 3.0 hours spilling →	Broughs Gill	5	3.0	down 17%	100%
Kier Hardy Way Overflow on sewer network EA ID / permit NWL00750 · 245/1373 Outlet location NZ3886158290 (OS grid reference) · View on Apple Maps WFD catchment WEAR (GB510302402900) 2024 spills / hours 10 / 5.8 Long-term average 15.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.0 hours spilling →	Wear (Saline Estuary)	10	3.0	no change	100%
Copeland Estate Off Site Sewer Overflow on sewer network EA ID / permit NWL00323 · 242/E/0382 Outlet location NZ1787625987 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 8 / 9.3 Long-term average 6.5 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 3.0 hours spilling →	Gaunless	5	3.0	down 38%	100%
Grinkle Road CSO Overflow on sewer network EA ID / permit NWL00627 · 254/1912 Outlet location NZ5873024080 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 3 / 2.8 Long-term average 2.1 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.0 hours spilling →	Unnamed Watercouse - Tees Estu	2	3.0	down 33%	100%
Warkworth Sewerage System SSO Mh No Overflow on sewer network EA ID / permit NWL01456 · 223/B/0057 Outlet location NU2483906224 (OS grid reference) · View on Apple Maps WFD catchment COQUET (GB510302203000) Bathing water Warkworth; Amble Links 2024 spills / hours 5 / 6.3 Long-term average 2.5 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.0 hours spilling →	Coquet, Tidal Waters	3	3.0	down 40%	100%
Bardon Mill (the Larches) SPS Storm discharge at pumping station EA ID / permit NWL00081 · 232/0990 Outlet location NY7727164456 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Tipalt Burn to Allen (GB103023075532) 2024 spills / hours 8 / 6.7 Long-term average 9.0 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 3.0 hours spilling →	River South Tyne	7	3.0	down 13%	100%
The Meadows CSO (Se 022) Overflow on sewer network EA ID / permit NWL01368 · 254/1819 Outlet location NZ3566528224 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Source to Bishopton Beck (GB103025072410) 2024 spills / hours 6 / 4.0 Long-term average 11.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.9 hours spilling →	Unnamed Trib of Shotton Beck	4	2.9	down 33%	91%
Thornton Street PS Overflow on sewer network EA ID / permit NWL01378 · 25/04/1769 Outlet location NZ5152019780 (OS grid reference) · View on Apple Maps WFD catchment Middlebeck to River Tees (GB510302509900) 2024 spills / hours 6 / 2.5 Long-term average 6.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.9 hours spilling →	Middle Beck (Tees Catchment)	5	2.9	down 17%	100%
Toad Pool CSO TE351 Overflow on sewer network EA ID / permit NWL01388 · 242/1049 Outlet location NZ1742726558 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 9 / 21 Long-term average 9.7 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Apr Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.9 hours spilling →	Gaunless	2	2.9	down 78%	84%
Front Street CSO Overflow on sewer network Company site name NORTH OF FRONT STREET CSO EA ID / permit NWL00570 · 245/1331 Outlet location NZ2141051180 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 7 / 5.0 Long-term average 11.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.8 hours spilling →	Stanley Burn Tributary	9	2.8	up 29%	100%
White Street Station Road CSO Overflow on sewer network EA ID / permit NWL01517 · 235/1329 Outlet location NZ2981264400 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 18 / 7.6 Long-term average 53.6 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.8 hours spilling →	River Tyne Estuary	13	2.8	down 28%	100%
CSO at Mill Terrace Overflow on sewer network EA ID / permit NWL00374 · 25/04/1606 Outlet location NZ3995023330 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Bishopton Bck to Brierle (GB103025072360) 2024 spills / hours 6 / 12 Long-term average 4.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 2.7 hours spilling →	Thorpe Beck	8	2.7	up 33%	100%
Yarm Road CSO (Y2) Overflow on sewer network EA ID / permit NWL01563 · EPRMB3892EJ Outlet location NZ2912514232 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 3 / 0.8 Long-term average 4.3 spills a year (monitored since 2015) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 2.7 hours spilling →	River Skerne	6	2.7	up 100%	88%
A66 Rider Sewer CSO Overflow on sewer network EA ID / permit NWL00015 · 254/0937 Outlet location NZ4678718620 (OS grid reference) · View on Apple Maps WFD catchment Tees (GB510302509900) 2024 spills / hours 3 / 1.0 Long-term average 5.9 spills a year (monitored since 2014) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 2.7 hours spilling →	Old River Tees	4	2.7	up 33%	97%
Nedderton CSO Overflow on sewer network EA ID / permit NWL00922 · 226/1266 Outlet location NZ2497083200 (OS grid reference) · View on Apple Maps WFD catchment Sleek Burn / Hepscott Burn Source to Tidal Limit (GB103022076230) 2024 spills / hours 26 / 47 Long-term average 18.3 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.7 hours spilling →	Green Letch	9	2.7	down 65%	96%
Netherton STW Inlet overflow at sewage works Sewage works Netherton EA ID / permit NWL00929 · 223/1000 Outlet location NT9921507484 (OS grid reference) · View on Apple Maps WFD catchment Netherton Burn Catch (trib of Wreigh Burn) (GB103022076750) 2024 spills / hours 11 / 33 Long-term average 6.7 spills a year (monitored since 2020) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.7 hours spilling →	Netherton Burn	8	2.7	down 27%	98%
Tyne Green CSO TD030 Overflow on sewer network EA ID / permit NWL01414 · 233/1239 Outlet location NY9349264832 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 10 / 15 Long-term average 7.2 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 2.6 hours spilling →	Cockshaw Burn	8	2.6	down 20%	100%
Anick CSO TD006 Overflow on sewer network EA ID / permit NWL00053 · 233/1242 Outlet location NY9593265116 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 12 / 60 Long-term average 21.3 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 2.6 hours spilling →	Unnamed Trib River Tyne	9	2.6	down 25%	100%
South Street CSO ST003 Overflow on sewer network EA ID / permit NWL01241 · 254/1825 Outlet location NZ3738723336 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Bishopton Bck to Brierle (GB103025072360) 2024 spills / hours 9 / 7.5 Long-term average 7.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 2.5 hours spilling →	Culverted W/C to Bishopton Bec	6	2.5	down 33%	96%
CSO Sunderlans Gas Works Overflow on sewer network EA ID / permit NWL00400 · 255/1198 Outlet location NZ4114055620 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) 2024 spills / hours 13 / 14 Long-term average 12.5 spills a year (monitored since 2013) Investigation Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 2.4 hours spilling →	North Sea	5	2.4	down 62%	100%
Heworth Shore CSO Overflow on sewer network EA ID / permit NWL00675 · 235/1201 Outlet location NZ2872062720 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 12 / 20 Long-term average 7.8 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 2.4 hours spilling →	Tyne Estuary	2	2.4	down 83%	100%
West Park Estate CSO Overflow on sewer network EA ID / permit NWL01486 · 245/1301 Outlet location NZ3558853076 (OS grid reference) · View on Apple Maps WFD catchment Herrington Burn from Source to Lumley Park Burn (GB103024077630) 2024 spills / hours 6 / 3.5 Long-term average 5.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.4 hours spilling →	Herrington Burn via A Culvert	4	2.4	down 33%	100%
Main Street CSO Overflow on sewer network EA ID / permit NWL00838 · 223/0951 Outlet location NU1854300330 (OS grid reference) · View on Apple Maps WFD catchment Coquet from Forest Burn to Tidal Limit (GB103022076693) 2024 spills / hours 16 / 8.8 Long-term average 12.6 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 2.4 hours spilling →	River Coquet	10	2.4	down 38%	91%
James Street SSO Overflow on sewer network EA ID / permit NWL00732 · 25/04/1768 Outlet location NZ5130020120 (OS grid reference) · View on Apple Maps WFD catchment Middlebeck River Tees (GB510302509900) 2024 spills / hours 4 / 3.0 Long-term average 6.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.4 hours spilling →	Middle Beck (Tees)	5	2.4	up 25%	91%
Deepdale Avenue CSO Overflow on sewer network EA ID / permit NWL00426 · 254/1815 Outlet location NZ5006417802 (OS grid reference) · View on Apple Maps WFD catchment Marton West Beck Catchment (trib of Tidal Tees) (GB103025072210) 2024 spills / hours 3 / 1.5 Long-term average 3.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 2.3 hours spilling →	Marton West Beck	4	2.3	up 33%	99%

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.