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
CSO at Reyrolle Sewer (North) Overflow on sewer network EA ID / permit NWL01104 · 235/1185 Outlet location NZ3002764488 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 19 / 13 Long-term average 18.0 spills a year (monitored since 2024) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 10 hours spilling →	River Tyne (Estuary)	17	10	down 11%	100%
Alnmouth SPS Storm discharge at pumping station EA ID / permit NWL00038 · 222/0839 Outlet location NU2431310614 (OS grid reference) · View on Apple Maps WFD catchment ALN (GB510302203300) 2024 spills / hours 13 / 40 Long-term average 13.8 spills a year (monitored since 2019) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 9.9 hours spilling →	River Aln	7	9.9	down 46%	100%
Shotley Bridge CSO DER0004 Overflow on sewer network EA ID / permit NWL01199 · 234/1107 Outlet location NZ0900152376 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 3 / 1.8 Long-term average 15.8 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 9.9 hours spilling →	Tributary of River Derwent	12	9.9	up 300%	99%
Hawthron CSO Overflow on sewer network EA ID / permit NWL00657 · 255/E/0640 Outlet location NZ4216745839 (OS grid reference) · View on Apple Maps WFD catchment Hawthorn Burn from Source to North Sea (GB103025075950) 2024 spills / hours 47 / 79 Long-term average 29.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 9.7 hours spilling →	North Dene Burn	17	9.7	down 64%	99%
Hexham CSO Overflow on sewer network EA ID / permit NWL00676 · EPRBB3598RX Outlet location NY9284664074 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 32 / 22 Long-term average 28.8 spills a year (monitored since 2021) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 9.7 hours spilling →	Culverted Trib Cockshaw Burn	25	9.7	down 22%	99%
Vinovium CSO A27 Overflow on sewer network EA ID / permit NWL01431 · 242/C/0385 Outlet location NZ2101627823 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Hummer Beck to Wear (GB103024072730) 2024 spills / hours 25 / 27 Long-term average 30.2 spills a year (monitored since 2013) 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 9.7 hours spilling →	Gaunless	13	9.7	down 48%	80%
Dunn Street Overflow on sewer network EA ID / permit NWL00463 · 235/1929 Outlet location NZ1687052290 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 13 / 45 Long-term average 10.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 9.7 hours spilling →	Kyo Burn	8	9.7	down 38%	99%
King Oswy Drive CSO Overflow on sewer network Company site name WEST VIEW ROAD CSO EA ID / permit NWL00757 · 255/1116 Outlet location NZ5001235871 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) 2024 spills / hours 9 / 5.3 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 9.6 hours spilling →	North Sea	11	9.6	up 22%	99%
A1068 Road Bridge CSO Overflow on sewer network EA ID / permit NWL00014 · 223/0871 Outlet location NU2483206265 (OS grid reference) · View on Apple Maps WFD catchment COQUET (GB510302203000) Bathing water Warkworth; Amble Links 2024 spills / hours 10 / 7.0 Long-term average 10.9 spills a year (monitored since 2013) Monitor below 90% Power failure / issue · Resolved - Oct Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 9.5 hours spilling →	Coquet Estuary	5	9.5	down 50%	88%
Queen Street Allottments CSO Overflow on sewer network EA ID / permit NWL01072 · 25/04/1777 Outlet location NZ5717020090 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 18 / 15 Long-term average 9.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 9.3 hours spilling →	Unnamed Trib of Dabholme Beck	13	9.3	down 28%	100%
Haswell SSO No 3 Overflow on sewer network EA ID / permit NWL00653 · 255/E/0643 Outlet location NZ3870041700 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 8 / 33 Long-term average 11.7 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 9.3 hours spilling →	Coldwell Burn/Murton Dene	8	9.3	no change	100%
Atkinson Road CSO Overflow on sewer network EA ID / permit NWL00067 · 235/1315 Outlet location NZ2160863384 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 27 / 25 Long-term average 35.5 spills a year (monitored since 2018) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 9.0 hours spilling →	Tyne Estuary	19	9.0	down 30%	100%
Ash Tree Lane CSO Overflow on sewer network EA ID / permit NWL00061 · 234/1056 Outlet location NZ1425059540 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 4 / 1.8 Long-term average 18.5 spills a year (monitored since 2015) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 8.9 hours spilling →	Spen Burn	14	8.9	up 250%	100%
Bedford Street CSO NTY057 Overflow on sewer network EA ID / permit NWL00103 · 235/1910 Outlet location NZ3575468102 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 28 / 100 Long-term average 20.1 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.9 hours spilling →	Tyne Estuary	12	8.9	down 57%	100%
Ramshaw SPS Storm discharge at pumping station EA ID / permit NWL01082 · 242/1007 Outlet location NZ1513525981 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 9 / 13 Long-term average 8.5 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.9 hours spilling →	Gordon Beck	10	8.9	up 11%	99%
Beal Bank SPS Storm discharge at pumping station EA ID / permit NWL00099 · 223/B/0222 Outlet location NU2511405549 (OS grid reference) · View on Apple Maps WFD catchment COQUET (GB510302203000) Bathing water Warkworth; Amble Links 2024 spills / hours 16 / 38 Long-term average 12.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.8 hours spilling →	River Coquet	6	8.8	down 63%	100%
Holmhill Field CSO CH043 Overflow on sewer network EA ID / permit NWL00696 · NPSWQD009250 Outlet location NZ2718349283 (OS grid reference) · View on Apple Maps WFD catchment South Burn to confluence with Wear (GB103024077623) 2024 spills / hours 17 / 28 Long-term average 26.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.6 hours spilling →	Trib of South Burn River Wear	8	8.6	down 53%	97%
Wades Farm CSO Wv 010 Overflow on sewer network EA ID / permit NWL01441 · 242/1061 Outlet location NZ1962826211 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Hummer Beck to Wear (GB103024072730) 2024 spills / hours 14 / 23 Long-term average 13.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 8.6 hours spilling →	River Gaunless	12	8.6	down 14%	98%
Dene Avenue CSO NC051 Overflow on sewer network EA ID / permit NWL00430 · 233/1271 Outlet location NZ1893665111 (OS grid reference) · View on Apple Maps WFD catchment Denton burn to river Tyne (GB510302310200) 2024 spills / hours 22 / 26 Long-term average 16.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.2 hours spilling →	Sugley Dene (River Tyne)	17	8.2	down 23%	95%
Railway Gardens CSO DER047 Overflow on sewer network EA ID / permit NWL01077 · 235/1930 Outlet location NZ1687452291 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 14 / 16 Long-term average 13.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 8.1 hours spilling →	Kyo Burn (River Team)	15	8.1	up 7%	100%
Quarry Lane SSO Overflow on sewer network EA ID / permit NWL01065 · 242/D/0075 Outlet location NZ1012025590 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 19 / 32 Long-term average 14.8 spills a year (monitored since 2013) Monitor below 90% Sensor failure / issue · Resolved - Aug Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	Grewburn Beck	10	8.0	down 47%	86%
Rear of Well House Farm CSO Overflow on sewer network EA ID / permit NWL01094 · NPSWQD009688 Outlet location NZ3412617086 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 15 / 9.5 Long-term average 11.3 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	Carcut Beck	9	8.0	down 40%	100%
Turner Street SPS Overflow on sewer network EA ID / permit NWL01410 · 223/0950 Outlet location NU2649204607 (OS grid reference) · View on Apple Maps WFD catchment COQUET (GB510302203000) Bathing water Warkworth; Amble Links 2024 spills / hours 9 / 23 Long-term average 15.6 spills a year (monitored since 2015) Monitor below 90% Comms failure / issue · Resolved - Jun Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 8.0 hours spilling →	River Coquet (Saline Estuary)	6	8.0	down 33%	76%
Brancepeth CSO Overflow on sewer network EA ID / permit NWL00185 · EPRBB3990WL Outlet location NZ2240337542 (OS grid reference) · View on Apple Maps WFD catchment Brancepeth Beck from Source to Wear (GB103024077420) 2024 spills / hours 12 / 6.8 Long-term average 9.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.9 hours spilling →	Stockley Beck	20	7.9	up 67%	100%
Crookham STW Inlet overflow at sewage works Sewage works Crookham EA ID / permit NWL00353 · 210/0115 Outlet location NT9195038130 (OS grid reference) · View on Apple Maps WFD catchment Till from Glen to River Tweed (GB102021073050) 2024 spills / hours 19 / 14 Long-term average 16.3 spills a year (monitored since 2021) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.9 hours spilling →	Till	16	7.9	down 16%	97%
West Holborn South CSO Overflow on sewer network EA ID / permit NWL01483 · 235/1945 Outlet location NZ3546666216 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 16 / 22 Long-term average 14.9 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.8 hours spilling →	River Tyne Saline Estuary	9	7.8	down 44%	98%
A692 CSO Overflow on sewer network EA ID / permit NWL00017 · 234/1117 Outlet location NZ0850049000 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 18 / 14 Long-term average 13.7 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 7.7 hours spilling →	Dene Burn	17	7.7	down 6%	100%
Dene Hall Drive CSO Overflow on sewer network EA ID / permit NWL00432 · EPRCB3290DR Outlet location NZ1973729001 (OS grid reference) · View on Apple Maps WFD catchment Wear from Beechburn Beck to Gaunless (GB103024077463) 2024 spills / hours 7 / 13 Long-term average 11.3 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 7.7 hours spilling →	Coal Burn	5	7.7	down 29%	99%
Sunn Inn CSO Overflow on sewer network EA ID / permit NWL01329 · 225/1059 Outlet location NZ1982685238 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Font to Bothal Burn (GB103022077061) 2024 spills / hours 11 / 17 Long-term average 8.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.5 hours spilling →	Church Burn	17	7.5	up 55%	98%
Church Lane High Street CSO Overflow on sewer network EA ID / permit NWL00287 · 254/1406 Outlet location NZ5490718880 (OS grid reference) · View on Apple Maps WFD catchment Culverted Watercourse to Rover Tees (GB510302509900) 2024 spills / hours 9 / 12 Long-term average 9.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 7.5 hours spilling →	Holme Beck	9	7.5	no change	100%
Berwick-Upon-Tweed SPS Storm discharge at pumping station EA ID / permit NWL00123 · 210/1329 Outlet location NU0039352665 (OS grid reference) · View on Apple Maps WFD catchment TWEED (GB510202110000) Bathing water Spittal 2024 spills / hours 13 / 17 Long-term average 7.3 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.4 hours spilling →	River Tweed	9	7.4	down 31%	99%
Great Broughton & Kirby CSO MH6 Overflow on sewer network EA ID / permit NWL00614 · 254/E/0277 Outlet location NZ5439206848 (OS grid reference) · View on Apple Maps WFD catchment Broughton Beck from Source to River Leven (GB103025071870) 2024 spills / hours 14 / 41 Long-term average 19.9 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 7.3 hours spilling →	Broughton Beck	5	7.3	down 64%	94%
Park Road North CSO Overflow on sewer network EA ID / permit NWL01013 · 245/1264 Outlet location NZ2823852408 (OS grid reference) · View on Apple Maps WFD catchment Wear DS of Lumley Park Burn to Tidal Limit (GB103024077624) 2024 spills / hours 12 / 13 Long-term average 12.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 7.3 hours spilling →	Tributary of River Wear	13	7.3	up 8%	99%
Middleton-in-Teesdale STW Inlet overflow at sewage works Sewage works Middleton In Teesdale EA ID / permit NWL00877 · 25/01/0919 Outlet location NY9513524887 (OS grid reference) · View on Apple Maps WFD catchment Tees from Maize Beck to Percy Beck (GB103025072511) 2024 spills / hours 27 / 21 Long-term average 22.0 spills a year (monitored since 2013) Monitor below 90% Sensor failure / issue · Resolved - Sep Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 7.3 hours spilling →	River Tees	11	7.3	down 59%	88%
Barkers Haugh CSO No. 10 Overflow on sewer network EA ID / permit NWL00082 · EPRJB3293AU Outlet location NZ2804143132 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 28 / 40 Long-term average 27.4 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 7.2 hours spilling →	River Wear	4	7.2	down 86%	99%
Dene Grove CSO Overflow on sewer network EA ID / permit NWL00431 · 253/1921 Outlet location NZ2766015342 (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 3.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 7.1 hours spilling →	Cocker Beck	4	7.1	no change	100%
Green Lane CSO 9(Wk 008) Overflow on sewer network EA ID / permit NWL00620 · 225/1069 Outlet location NZ2730086570 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Bothal Burn to North Sea (GB103022077062) 2024 spills / hours 19 / 50 Long-term average 22.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 7.0 hours spilling →	Wansbeck, Tributary of	6	7.0	down 68%	93%
Briardale Road CSO Overflow on sewer network EA ID / permit NWL00192 · 226/1057 Outlet location NZ2960382326 (OS grid reference) · View on Apple Maps WFD catchment River Blyth Estury (GB510302203200) 2024 spills / hours 39 / 79 Long-term average 38.2 spills a year (monitored since 2013) Monitor below 90% Power failure / issue · Resolved - Jul Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 6.9 hours spilling →	Blyth Estuary	8	6.9	down 79%	78%
Newton Bewley CSO 1 (Billingham STW) Overflow on sewer network EA ID / permit NWL01572 · EPREP3925PX Outlet location NZ4846325841 (OS grid reference) · View on Apple Maps WFD catchment Tees water body (GB510302509900) 2024 spills / hours 9 / 7.5 Long-term average 8.0 spills a year (monitored since 2024) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.9 hours spilling →	Tees Estuary	7	6.9	down 22%	99%
Ovingham Pumping Station EO/CSO Storm discharge at pumping station EA ID / permit NWL00994 · 233/G/0328 Outlet location NZ0840263635 (OS grid reference) · View on Apple Maps WFD catchment Whittle Burn Catchment (trib of Tyne) (GB103023075770) 2024 spills / hours 34 / 152 Long-term average 21.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.9 hours spilling →	Whittle Burn, Trib of Tyne	7	6.9	down 79%	98%
Liverton Reailway SPS Storm discharge at pumping station Company site name LIVERTON RAILWAY SPS EA ID / permit NWL00799 · 256/C/0407 Outlet location NZ7140818205 (OS grid reference) · View on Apple Maps WFD catchment Middle Gill Beck from Source to Kilton Beck (GB103025071940) 2024 spills / hours 9 / 32 Long-term average 7.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 6.9 hours spilling →	White Cliffe Beck	3	6.9	down 67%	92%
Conishead Terracem South Hetton CSO Overflow on sewer network EA ID / permit NWL00314 · 245/A/0605 Outlet location NZ3759145674 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 11 / 22 Long-term average 22.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.9 hours spilling →	Coldwell Burn, Tributary of	14	6.9	up 27%	100%
Riding Mill Village SPS Storm discharge at pumping station EA ID / permit NWL01109 · 233/1040 Outlet location NZ0189561496 (OS grid reference) · View on Apple Maps WFD catchment March Burn Catchment (trib of Tyne) (GB103023075650) 2024 spills / hours 27 / 57 Long-term average 26.2 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 6.9 hours spilling →	Riding Mill Burn	7	6.9	down 74%	100%
Locke Park CSO Overflow on sewer network EA ID / permit NWL00801 · 254/1911 Outlet location NZ5923024827 (OS grid reference) · View on Apple Maps WFD catchment Tees Estuary (S Bank) (GB103025072320) 2024 spills / hours 2 / 2.6 Long-term average 1.4 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	The Fleet	2	6.8	no change	99%
Grange Villa CSO Overflow on sewer network EA ID / permit NWL00603 · 245/1214 Outlet location NZ2382652069 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 3 / 9.5 Long-term average 3.7 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.8 hours spilling →	Blindy Burn	1	6.8	down 67%	98%
Romaldkirk Sewage Disposal Works Inlet overflow at sewage works Sewage works Romaldkirk EA ID / permit NWL01118 · 25/01/0912 Outlet location NZ0020022600 (OS grid reference) · View on Apple Maps WFD catchment Tees from Maize Beck to Percy Beck (GB103025072511) 2024 spills / hours 22 / 179 Long-term average 10.0 spills a year (monitored since 2022) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.7 hours spilling →	River Tees	11	6.7	down 50%	99%
Spring Court CSO DL006 Overflow on sewer network EA ID / permit NWL01253 · 253/1275 Outlet location NZ2748216123 (OS grid reference) · View on Apple Maps WFD catchment Skerne from Demons Beck to Tees (GB103025072596) 2024 spills / hours 5 / 16 Long-term average 6.3 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 6.6 hours spilling →	West Beck	4	6.6	down 20%	88%
NTY025 Willington Quay CSO 6 Overflow on sewer network EA ID / permit NWL01526 · EPRBB3897EY Outlet location NZ3205866105 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 48 / 80 Long-term average 34.0 spills a year (monitored since 2023) Investigation Operational investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.6 hours spilling →	River Tyne	17	6.6	down 65%	100%
Blackburn Bridge CSO (Te 015) Overflow on sewer network EA ID / permit NWL00144 · 242/1056 Outlet location NZ1335024560 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 25 / 28 Long-term average 16.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 6.5 hours spilling →	The Black Burn	12	6.5	down 52%	99%
The Firs CSO ED003 Overflow on sewer network EA ID / permit NWL01358 · 232/1167 Outlet location NY7165346139 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Black Burn to Tipalt Burn (GB103023075531) 2024 spills / hours 4 / 1.0 Long-term average 2.4 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 6.5 hours spilling →	River South Tyne	3	6.5	down 25%	87%

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.