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
Fordley CSO Fern Drive Overflow on sewer network EA ID / permit NWL00057 · 226/G/0058 Outlet location NZ2691573580 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) 2024 spills / hours 1 / 0.3 Long-term average 0.5 spills a year (monitored since 2018) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.1 hours spilling →	Seaton Burn	1	0.1	no change	33%
Back Lane Combined Sewer Overflow Overflow on sewer network EA ID / permit NWL00076 · 245/1396 Outlet location NZ2917050060 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 0 / 0.0 Long-term average 0.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Brough'S Gill	2	0.1	up from 0	100%
Bothal Cottages Overflow on sewer network EA ID / permit NWL00172 · 225/1028 Outlet location NZ2569086890 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Bothal Burn to North Sea (GB103022077062) 2024 spills / hours 4 / 3.8 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 0.1 hours spilling →	Unnamed Trib of R Wansbeck	1	0.1	down 75%	99%
Burnside CSO Overflow on sewer network EA ID / permit NWL00223 · 235/1916 Outlet location NZ1918865935 (OS grid reference) · View on Apple Maps WFD catchment Denton Burn River Tyne (GB510302310200) 2024 spills / hours 5 / 1.7 Long-term average 4.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Sugley Dene	1	0.1	down 80%	100%
Grassbanks CSO Overflow on sewer network EA ID / permit NWL00607 · 235/A/0510 Outlet location NZ3060059900 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 3 / 6.3 Long-term average 3.5 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 0.1 hours spilling →	Don	1	0.1	down 67%	99%
Heaton Gardens Pumping Station Storm discharge at pumping station EA ID / permit NWL00662 · 235/1388 Outlet location NZ3551062520 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 7 / 44 Long-term average 3.5 spills a year (monitored since 2022) 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 0.1 hours spilling →	River Don	1	0.1	down 86%	78%
High Spen CSO Rowlands Gill 6 Overflow on sewer network EA ID / permit NWL00684 · EPRBB3897WE Outlet location NZ1377259658 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 0 / 0.0 Long-term average 1.1 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Unnamed Trib of Spen Burn	3	0.1	up from 0	100%
Jarrow Hedworth CSO 20 Overflow on sewer network EA ID / permit NWL00734 · EPRAB3290EA Outlet location NZ3543562359 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 1 / 0.3 Long-term average 1.1 spills a year (monitored since 2013) Monitor below 90% Capital / maintenance works affect EDM operation · Resolved - Sep Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.1 hours spilling →	River Don	2	0.1	up 100%	90%
Moor View CSO Overflow on sewer network EA ID / permit NWL00902 · 232/1016 Outlet location NY7413063810 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Tipalt Burn to Allen (GB103023075532) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	Melkridge Burn	1	0.1	up from 0	96%
Outlet Road No 2 CSO Overflow on sewer network EA ID / permit NWL00993 · 233/1240 Outlet location NY9433864183 (OS grid reference) · View on Apple Maps WFD catchment Tyne from Watersmeet to Tidal Limit (GB103023075801) 2024 spills / hours 1 / 0.4 Long-term average 0.5 spills a year (monitored since 2014) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Tyne	1	0.1	no change	100%
Quayside (Hillgate Street CSO) Overflow on sewer network EA ID / permit NWL01068 · EPRBP3721GX Outlet location NZ2542263774 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 0 / 0.0 Long-term average 0.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	River Tyne	1	0.1	up from 0	100%
Grange Road CSO (A004) Overflow on sewer network EA ID / permit NWL01189 · 223/G/0088 Outlet location NU1981408744 (OS grid reference) · View on Apple Maps WFD catchment Tyelaw Burn Catchment (trib of Coquet) (GB103022076720) 2024 spills / hours 3 / 1.8 Long-term average 1.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	Tyelaw Burn	1	0.1	down 67%	100%
St Ives Road CSO Overflow on sewer network EA ID / permit NWL01262 · 234/1140 Outlet location NZ1261052430 (OS grid reference) · View on Apple Maps WFD catchment Pont Burn Catchment (trib of Derwent) (GB103023074780) 2024 spills / hours 2 / 0.5 Long-term average 2.2 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	Trib Pont Burn	2	0.1	no change	97%
Stoney Rigg Overflow on sewer network EA ID / permit NWL01315 · 232/1178 Outlet location NY7010063560 (OS grid reference) · View on Apple Maps WFD catchment South Tyne from Tipalt Burn to Allen (GB103023075532) 2024 spills / hours 0 / 0.0 Long-term average 0.5 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	South Tyne	1	0.1	up from 0	86%
Usworth Hall CSO Overflow on sewer network EA ID / permit NWL01423 · 235/1953 Outlet location NZ3155058850 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 4 / 3.0 Long-term average 1.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Don, Tributary of	1	0.1	down 75%	94%
Warden Village STW Inlet overflow at sewage works Sewage works Warden Village EA ID / permit NWL01452 · 231/0271 Outlet location NY9169666201 (OS grid reference) · View on Apple Maps WFD catchment N Tyne from Barrasford to S Tyne confluence (GB103023075802) 2024 spills / hours 3 / 3.9 Long-term average 2.3 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	River North Tyne	3	0.1	no change	95%
Sharpness Point SPS Storm discharge at pumping station EA ID / permit NWL01180 · 235/1582 Outlet location NZ3718569945 (OS grid reference) · View on Apple Maps WFD catchment Tyne and Wear (GB650301500002) Bathing water Tynemouth Long Sands South 2024 spills / hours 3 / 5.4 Long-term average 3.9 spills a year (monitored since 2019) Monitor below 90% Comms failure / issue · Resolved - January after reporting year Investigation Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	North Sea	1	0.1	down 67%	46%
Busty Bank Storm Sewage Overflow Overflow on sewer network EA ID / permit NWL00228 · 234/0951 Outlet location NZ1760057070 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 2 / 0.5 Long-term average 2.4 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Leapmill Burn	2	0.1	no change	98%
Cockfield P.S. & Lands Farm CSO Overflow on sewer network EA ID / permit NWL00305 · 242/1028 Outlet location NZ1362024920 (OS grid reference) · View on Apple Maps WFD catchment Gaunless from Source to Hummer Beck (GB103024072690) 2024 spills / hours 2 / 0.5 Long-term average 6.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Gaunless	1	0.1	down 50%	99%
Coldwell Burn SSO Overflow on sewer network EA ID / permit NWL00307 · 245/0264 Outlet location NZ3802044140 (OS grid reference) · View on Apple Maps WFD catchment Pittington Beck from Coalford to Old Durham Beck (GB103024077540) 2024 spills / hours 0 / 0.0 Long-term average 1.5 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Coldwell Burn	1	0.1	up from 0	91%
CSO Rear 11 St Austell Gardens Overflow on sewer network EA ID / permit NWL00396 · 235/1483 Outlet location NZ2543758543 (OS grid reference) · View on Apple Maps WFD catchment Team from Source to Tyne (GB103023075670) 2024 spills / hours 0 / 0.0 Long-term average 1.3 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	River Team Tributary	2	0.1	up from 0	98%
Dale Street CSO Overflow on sewer network EA ID / permit NWL00412 · 25/06/1030 Outlet location NZ6296422768 (OS grid reference) · View on Apple Maps WFD catchment Tees Coastal (GB650301500005) Bathing water Marske Sands 2024 spills / hours 1 / 0.3 Long-term average 1.6 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Long Beck	1	0.1	no change	98%
East View CSO Overflow on sewer network EA ID / permit NWL00490 · 245/1074 Outlet location NZ1907051470 (OS grid reference) · View on Apple Maps WFD catchment Twizell Burn from Source to Cong Burn (GB103024077590) 2024 spills / hours 0 / 0.0 Long-term average 1.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Stanley Burn	1	0.1	up from 0	100%
Iveston Lane CSO Overflow on sewer network EA ID / permit NWL00729 · 244/0918 Outlet location NZ1426050500 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 0 / 0.0 Long-term average 0.1 spills a year (monitored since 2014) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Iveston Burn	1	0.1	up from 0	92%
North Road NO1 Overflow on sewer network EA ID / permit NWL00965 · 235/1505 Outlet location NZ3543062360 (OS grid reference) · View on Apple Maps WFD catchment Don from Source to Tidal Limit (GB103023075690) 2024 spills / hours 1 / 0.3 Long-term average 1.1 spills a year (monitored since 2013) 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 0.1 hours spilling →	Don	1	0.1	no change	80%
Ouse Burn CSO No 8 Overflow on sewer network EA ID / permit NWL00988 · 235/F/0346C Outlet location NZ2609565199 (OS grid reference) · View on Apple Maps WFD catchment Ouse Burn from Source to Tyne (GB103023075780) 2024 spills / hours 5 / 1.0 Long-term average 2.8 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Not Applicable - Ongoing investigation Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Ouse Burn	1	0.1	down 80%	87%
Pelton CSO Overflow on sewer network EA ID / permit NWL01023 · 245/E/0391 Outlet location NZ2536552618 (OS grid reference) · View on Apple Maps WFD catchment Cong Burn from Twizell Burn to Wear (GB103024077600) 2024 spills / hours 0 / 0.0 Long-term average 2.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Stella Gill	2	0.1	up from 0	99%
South Road No 18 CSO Overflow on sewer network EA ID / permit NWL01236 · NPSWQD006905 Outlet location NT9942128106 (OS grid reference) · View on Apple Maps WFD catchment Wooler Water from Harthope Burn to Till (GB102021072930) 2024 spills / hours 1 / 0.3 Long-term average 5.9 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	Wooler Water	1	0.1	no change	100%
South Street Storm Sewage Overflow Overflow on sewer network EA ID / permit NWL01242 · 244/0956 Outlet location NZ1214050620 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 3 / 6.0 Long-term average 5.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.1 hours spilling →	Stockerley Burn, Tributary of	1	0.1	down 67%	94%
South Terrace CSO (G003) Overflow on sewer network EA ID / permit NWL01243 · 234/1147 Outlet location NZ1209057630 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 6 / 4.5 Long-term average 5.3 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.1 hours spilling →	Tongue Burn	1	0.1	down 83%	100%
Brenda Road CSO Overflow on sewer network EA ID / permit NWL01246 · 255/A/0940 Outlet location NZ5136529269 (OS grid reference) · View on Apple Maps WFD catchment The Stell Culverted to North Sea (GB650301500005) Bathing water Seaton Carew Centre 2024 spills / hours 0 / 0.0 Long-term average 0.5 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Stell, Tributary of	1	0.1	up from 0	100%
Stainton CSO Overflow on sewer network EA ID / permit NWL01274 · 252/1052 Outlet location NZ0711818504 (OS grid reference) · View on Apple Maps WFD catchment Langley Bk and Westholme Bk frm Sudburn Bk to Tees (GB103025072200) 2024 spills / hours 6 / 4.0 Long-term average 5.6 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Black Beck Tributary	1	0.1	down 83%	100%
Quarry Heads Lane CSO Overflow on sewer network EA ID / permit NWL01307 · 245/E/0409 Outlet location NZ2710741899 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 2 / 0.5 Long-term average 1.9 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	River Wear	2	0.1	no change	95%
Dinnington West SPS Storm discharge at pumping station EA ID / permit NWL00447 · 226/0204 Outlet location NZ2014573312 (OS grid reference) · View on Apple Maps WFD catchment Ponteland to Dinnington Catchment Area (GB103022076870) 2024 spills / hours 0 / 0.0 Long-term average 17.2 spills a year (monitored since 2017) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.1 hours spilling →	Trib of Prestwick Carr	1	0.1	up from 0	98%
20 Derwent Dale Cutlers Rd CSO Overflow on sewer network EA ID / permit NWL00001 · 234/1113 Outlet location NZ0901752447 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 0 / 0.0 Long-term average 1.8 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Feb Investigation Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.0 hours spilling →	River Derwent	1	0.0	up from 0	88%
5 South Street CSO, Crookhall Overflow on sewer network EA ID / permit NWL00009 · 244/0919 Outlet location NZ1214050620 (OS grid reference) · View on Apple Maps WFD catchment Smallhope Burn from Source to Browney, Stocke (GB103024077330) 2024 spills / hours 0 / 0.0 Long-term average 1.8 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.0 hours spilling →	Stockerley Burn Tributary	1	0.0	up from 0	100%
Cauldwell CSO Overflow on sewer network EA ID / permit NWL00012 · 234/1087 Outlet location NZ0967753114 (OS grid reference) · View on Apple Maps WFD catchment Derwent from Burnhope Burn to River Tyne (GB103023074790) 2024 spills / hours 0 / 0.0 Long-term average 4.9 spills a year (monitored since 2013) Investigation Operational investigation ongoing Improvement Operational improvement completed Volume & pollution Estimate from 0.0 hours spilling →	Snows Green Burn	1	0.0	up from 0	99%
California Row CSO Overflow on sewer network EA ID / permit NWL00240 · 251/0863 Outlet location NY9513224887 (OS grid reference) · View on Apple Maps WFD catchment Tees from Maize Beck to Percy Beck (GB103025072511) 2024 spills / hours 3 / 2.3 Long-term average 2.9 spills a year (monitored since 2018) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	River Tees	1	0.0	down 67%	98%
Church Street DU026 Overflow on sewer network EA ID / permit NWL00290 · 245/1388 Outlet location NZ2743741803 (OS grid reference) · View on Apple Maps WFD catchment Wear from Croxdale Beck to Lumley Park Burn (GB103024077621) 2024 spills / hours 10 / 79 Long-term average 8.1 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 0.0 hours spilling →	River Wear	1	0.0	down 90%	93%
Coniscliffe Road CSO Overflow on sewer network EA ID / permit NWL00313 · 25/05/5029 Outlet location NZ4873432427 (OS grid reference) · View on Apple Maps WFD catchment Burn Valley Beck to North Sea (GB650301500005) 2024 spills / hours 1 / 0.3 Long-term average 1.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	Burn Valley Beck	1	0.0	no change	100%
Cottage Hospital CSO Overflow on sewer network EA ID / permit NWL00334 · 256/0939 Outlet location NZ7003019636 (OS grid reference) · View on Apple Maps WFD catchment Old House Gill (GB650301500005) 2024 spills / hours 6 / 2.8 Long-term average 7.4 spills a year (monitored since 2015) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.0 hours spilling →	Unnamed Trib of Unnamed Pond	1	0.0	down 83%	98%
Howdon (Adjacent A19 Roundabout)CSO Overflow on sewer network EA ID / permit NWL00709 · NPSWQD009134 Outlet location NZ3300666078 (OS grid reference) · View on Apple Maps WFD catchment TYNE (GB510302310200) 2024 spills / hours 1 / 0.3 Long-term average 1.0 spills a year (monitored since 2020) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	The River Tyne	1	0.0	no change	100%
Kirk Street CSO Overflow on sewer network EA ID / permit NWL00762 · 254/1834 Outlet location NZ3727023220 (OS grid reference) · View on Apple Maps WFD catchment Billingham Beck from Bishopton Bck to Brierle (GB103025072360) 2024 spills / hours 1 / 0.3 Long-term average 1.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation ongoing Improvement Operational improvement ongoing Volume & pollution Estimate from 0.0 hours spilling →	Culverted W/C to Bishopton Bec	1	0.0	no change	100%
Mafeking Combined Sewer Overflow Overflow on sewer network EA ID / permit NWL00833 · EPRAB3196VY Outlet location NZ2018585520 (OS grid reference) · View on Apple Maps WFD catchment Wansbeck from Font to Bothal Burn (GB103022077061) 2024 spills / hours 6 / 3.0 Long-term average 5.0 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement completed Volume & pollution Estimate from 0.0 hours spilling →	Church Burn	1	0.0	down 83%	100%
Mill Farm Combined Sewer Overflow Overflow on sewer network EA ID / permit NWL00885 · 241/1121 Outlet location NZ1707031805 (OS grid reference) · View on Apple Maps WFD catchment Beechburn Beck (Trib of Wear) (GB103024077390) 2024 spills / hours 2 / 17 Long-term average 4.5 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing, Operational investigation completed Improvement Operational improvement ongoing Volume & pollution Estimate from 0.0 hours spilling →	Beechburn Beck	1	0.0	down 50%	99%
South End Cottages CSO Storm discharge at pumping station EA ID / permit NWL00891 · Permit applied for Outlet location NZ5255429206 (OS grid reference) · View on Apple Maps WFD catchment North Sea (GB650301500005) 2024 spills / hours 5 / 1.3 Long-term average 3.5 spills a year (monitored since 2013) Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	Culverted watercourse to North Sea	1	0.0	down 80%	100%
Rectory Cottage CSO Overflow on sewer network EA ID / permit NWL01096 · 243/0971 Outlet location NZ2250737849 (OS grid reference) · View on Apple Maps WFD catchment Brancepeth Beck from Source to Wear (GB103024077420) 2024 spills / hours 1 / 0.3 Long-term average 0.3 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	Brancepeth Beck, Tributary of	1	0.0	no change	100%
Roseleigh CSO Overflow on sewer network EA ID / permit NWL01127 · 233/1055 Outlet location NZ1167164640 (OS grid reference) · View on Apple Maps WFD catchment River Tyne (GB510302310200) 2024 spills / hours 1 / 0.5 Long-term average 25.4 spills a year (monitored since 2013) Monitor below 90% Comms failure / issue · Resolved - Aug Investigation No investigation activity in reporting period Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	River Tyne via Surface Wtr Swr	1	0.0	no change	88%
Sherburn SSO Manhole No. 34 Overflow on sewer network EA ID / permit NWL01186 · 245/E/0513 Outlet location NZ3192041820 (OS grid reference) · View on Apple Maps WFD catchment Old Durham Beck from Source to Pittington Beck (GB103024077490) 2024 spills / hours 0 / 0.0 Long-term average 0.4 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	Sherburnhouse Beck	1	0.0	up from 0	100%
West End CSO Overflow on sewer network EA ID / permit NWL01204 · 226/1125 Outlet location NZ3373775609 (OS grid reference) · View on Apple Maps WFD catchment Seaton Burn from Source to Tidal Limit (GB103022076190) Bathing water Seaton Sluice 2024 spills / hours 1 / 0.1 Long-term average 1.7 spills a year (monitored since 2013) Investigation Env Act (SODRP) investigation ongoing Improvement No improvement action in reporting period Volume & pollution Estimate from 0.0 hours spilling →	Seaton Burn	1	0.0	no change	99%

Sewage treatment works

Storm tanks and inlet overflows at each Northumbrian Water sewage works. The figures are 2025 spills.

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