Storm overflow register · 2025 annual return

Wessex Water storm overflows, 2025

Wessex Water reported 1,346 storm overflows in England for 2025. Together they recorded 24,442 spills over 190,666 hours, an average of 18.2 spills per overflow against 20.4 across England. That ranks 6 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 45% on 2024.

220 overflows did not spill · 62 spilled more than 60 times · 1,308 had monitors working for 90% of the year or more · 242 sewage treatment works with overflows

Hours spilling by month, 2025

020k40k60k80kJan 2025: 60,197 hours spillingJanFeb 2025: 30,296 hours spillingFebMar 2025: 7,928 hours spillingMarApr 2025: 1,385 hours spillingAprMay 2025: 762 hours spillingMayJun 2025: 472 hours spillingJunJul 2025: 218 hours spillingJulAug 2025: 452 hours spillingAugSep 2025: 2,922 hours spillingSepOct 2025: 1,454 hours spillingOctNov 2025: 18,116 hours spillingNovDec 2025: 66,686 hours spillingDec
Hours spilling, all Wessex Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Wessex Water storm overflows

Sorted by hours spilling. Open an overflow for its permit, location, reasons for high spills and improvement status.

OverflowDischarges toSpills 2025Hours 2025Spills vs 2024Monitor uptime
8 Market Place CSO
Overflow on sewer network
Company site name
FROME SINGERS CATTLE MARKET
EA ID / permit
WXW00051 · 100442
Outlet location
ST7770348110 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Maiden Bradley to Mells) (GB109053022101)
2024 spills / hours
9 / 2.5
Long-term average
11.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.1 hours spilling →
River Frome via SWS 6 1.1 down 33% 100%
Footshill Road CSO
Overflow on sewer network
Company site name
BRISTOL HANHAM FOOTSHILL ROAD
EA ID / permit
WXW00435 · 101757
Outlet location
ST6289872188 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
7 / 1.3
Long-term average
5.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.1 hours spilling →
River Avon (via SWS) 7 1.1 no change 100%
Number 242 North Road PS
Storm discharge at pumping station
Company site name
YATE NORTH ROAD
EA ID / permit
WXW00808 · 101589
Outlet location
ST6998883875 (OS grid reference) · View on Apple Maps
WFD catchment
Laddon Bk - source to conf R Frome (Brist) (GB109053027590)
2024 spills / hours
5 / 44
Long-term average
2.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.1 hours spilling →
Tributary of Ladden Brook 1 1.1 down 80% 100%
1 Howard Road CSO
Overflow on sewer network
Company site name
BRISTOL LINDEN ROAD JNC HOWARD ROAD
EA ID / permit
WXW00001 · NPSWQD010513
Outlet location
ST5861075072 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
2 / 0.4
Long-term average
4.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Cranbrook via SWS 6 1.0 up 200% 100%
Bath Road Trading Estate CSO
Overflow on sewer network
Company site name
BRISTOL BATH ROAD TRADING ESTATE
EA ID / permit
WXW00113 · 100589/CS/01
Outlet location
ST6093071894 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
17 / 14
Long-term average
10.3 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
River Avon (Estuarine) 3 1.0 down 82% 100%
Filton Avenue CSO
Overflow on sewer network
Company site name
FILTON FILTON AVENUE R/G 699
EA ID / permit
WXW00425 · 010988
Outlet location
ST6145978870 (OS grid reference) · View on Apple Maps
WFD catchment
Stoke Bk - source to conf Bradley Bk (GB109053027540)
2024 spills / hours
5 / 1.7
Long-term average
5.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
Filton Brook via SWS 5 1.0 no change 100%
Harbury Road Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL HARBURY ROAD
EA ID / permit
WXW00502 · 100470
Outlet location
ST5815577315 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
7 / 0.7
Long-term average
6.4 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 1.0 hours spilling →
Trib of River Trym via SWS 10 1.0 up 43% 98%
Meadow Vale Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL MEADOW VALE NO 40 FRONT GARDEN
EA ID / permit
WXW00702 · 103313
Outlet location
ST5612074460 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
9 / 3.2
Long-term average
5.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 1.0 hours spilling →
River Avon via SWS (Estuarine) 7 1.0 down 22% 99%
Widcombe Rise CSO
Overflow on sewer network
Company site name
BATH WIDCOMBE RISE OFF PRIOR PARK ROAD
EA ID / permit
WXW01258 · 102604
Outlet location
ST7538464298 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
15 / 2.7
Long-term average
13.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.9 hours spilling →
River Avon via SWS 12 0.9 down 20% 100%
Victoria Road CSO
Overflow on sewer network
Company site name
DORCHESTER VICTORIA ROAD / DAMERS ROAD
EA ID / permit
WXW01177 · EPRAP3920GG
Outlet location
SY6954890767 (OS grid reference) · View on Apple Maps
WFD catchment
Frome Dorset (Lower) u/s Louds Mill Dorchester (GB108044009691)
2024 spills / hours
1 / 0.2
Long-term average
3.9 spills a year (monitored since 2018)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
The Mill Stream via SWS 5 0.9 up 400% 100%
Castlefields Park Combined Sewer
Overflow on sewer network
Company site name
CALNE RIVER MARDEN (RIVER BANK) SOUTH MARDEN HOUSE NEW ROAD
EA ID / permit
WXW00234 · 100776
Outlet location
ST9967570740 (OS grid reference) · View on Apple Maps
WFD catchment
Marden - source to conf Cowage Bk (GB109053022050)
2024 spills / hours
6 / 23
Long-term average
3.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Marden 1 0.9 down 83% 100%
Portland Railway Gravity Sewer
Storm discharge at pumping station
EA ID / permit
WXW00878 · 040634
Outlet location
SY7070072300 (OS grid reference) · View on Apple Maps
WFD catchment
Dorset / Hampshire (GB620705550000)
2024 spills / hours
2 / 0.6
Long-term average
3.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.9 hours spilling →
Lyme Bay (C) 7 0.9 up 250% 90%
Weston Road CSO
Overflow on sewer network
Company site name
WEYMOUTH WESTON ROAD
EA ID / permit
WXW01240 · 400899
Outlet location
SY6758078730 (OS grid reference) · View on Apple Maps
WFD catchment
WEY (GB510804415700)
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
0 / 0.0
Long-term average
2.2 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Weymouth Harbour(E) 3 0.9 up from 0 100%
George Street CSO
Overflow on sewer network
Company site name
WARMINSTER GEORGE ST
EA ID / permit
WXW00460 · 401093
Outlet location
ST8723345172 (OS grid reference) · View on Apple Maps
WFD catchment
Wylye Trib (The Were or Swan) (GB108043022540)
2024 spills / hours
8 / 2.5
Long-term average
7.8 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.9 hours spilling →
The Were 3 0.9 down 63% 100%
Speedwell Road CSO
Overflow on sewer network
Company site name
BRISTOL SPEEDWELL ROAD O/S NO 415
EA ID / permit
WXW01028 · 101248
Outlet location
ST6354474489 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
8 / 2.2
Long-term average
6.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Tributary of Coombe Brook 5 0.9 down 38% 100%
Fieldings Road CSO
Overflow on sewer network
Company site name
BATH FIELDINGS ROAD
EA ID / permit
WXW00424 · 010914
Outlet location
ST7307564793 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
24 / 9.9
Long-term average
18.5 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
River Avon via SWS 3 0.9 down 88% 95%
Greinton Wastewater Pumping Station
Storm discharge at pumping station
Company site name
GREINTON MOOR DRIVE
EA ID / permit
WXW00487 · 102299
Outlet location
ST4122136246 (OS grid reference) · View on Apple Maps
WFD catchment
King's Sedgemoor Drain - Henley Sluice to mouth (GB108052021150)
2024 spills / hours
5 / 17
Long-term average
3.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.9 hours spilling →
Trib Greinton Rhyne Drain (S) 1 0.9 down 80% 100%
Castle Cove Pumping Station
Storm discharge at pumping station
Company site name
WEYMOUTH CASTLE COVE OLD CASTLE ROAD WYKE REGIS
EA ID / permit
WXW00233 · EPRAP3923KW
Outlet location
SY6768477538 (OS grid reference) · View on Apple Maps
WFD catchment
Portland Harbour (GB680805270000)
Bathing water
Portland Harbour Castle Cove; Portland Harbour Sandsfoot Castle
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
2 / 0.7
Long-term average
1.8 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
Portland Harbour 2 0.8 no change 100%
Iford Bridge Sewage Pumping Station
Storm discharge at pumping station
Company site name
BOURNEMOUTH IFORD LANE TUCKTON
EA ID / permit
WXW00575 · 401244
Outlet location
SZ1466092520 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Christchurch Avon Beach; Christchurch Friar`s Cliff
2024 spills / hours
1 / 0.3
Long-term average
8.9 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 0.8 hours spilling →
River Stour(S) 2 0.8 up 100% 100%
Cats Ash Combined Sewer Overflow
Overflow on sewer network
Company site name
SHEPTON MALLET CATS ASH/COWL STREET
EA ID / permit
WXW00235 · 100506
Outlet location
ST6183043830 (OS grid reference) · View on Apple Maps
WFD catchment
Sheppey (GB108052021221)
2024 spills / hours
43 / 70
Long-term average
17.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.8 hours spilling →
River Sheppey 6 0.8 down 86% 96%
84 New Cheltenham Road CSO
Overflow on sewer network
Company site name
BRISTOL KINGSWOOD NEW CHELTENHAM ROAD NO 84
EA ID / permit
WXW00054 · 100896
Outlet location
ST6631974374 (OS grid reference) · View on Apple Maps
WFD catchment
Siston Bk - source to conf R Avon (Brist) (GB109053027450)
2024 spills / hours
23 / 4.3
Long-term average
22.3 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Warmley Brook via SWS 9 0.7 down 61% 96%
Fisherman'S Walk Overflow
Overflow on sewer network
Company site name
BOURNEMOUTH FISHERMANS WALK CIS
EA ID / permit
WXW00429 · 051310
Outlet location
SZ1287490694 (OS grid reference) · View on Apple Maps
WFD catchment
Dorset / Hampshire (GB620705550000)
Bathing water
Bournemouth Fisherman`s Walk
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
2 / 0.5
Long-term average
0.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.7 hours spilling →
English Channel 1 0.7 down 50% 99%
Southlands Combined Sewer Overflow
Overflow on sewer network
Company site name
BATH SOUTHLANDS RO NO 125
EA ID / permit
WXW01021 · 012181
Outlet location
ST7345964995 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
3 / 6.9
Long-term average
11.7 spills a year (monitored since 2019)
Monitor below 90%
Telemetry or data archiving failure / issue · Scheduled
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Avon via SWS 6 0.7 up 100% 87%
St John'S Road CSO
Overflow on sewer network
Company site name
BATH ST JOHNS ROAD OPP VULCAN HOUSE
EA ID / permit
WXW01040 · 102822
Outlet location
ST7520765401 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
1 / 4.7
Long-term average
6.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Avon 5 0.7 up 400% 100%
Sandford Lane Pumping Station
Storm discharge at pumping station
Company site name
WAREHAM SANDFORD LANE
EA ID / permit
WXW00957 · 401201
Outlet location
SY9209988177 (OS grid reference) · View on Apple Maps
WFD catchment
Piddle (Lower) (GB108044010080)
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
1 / 1.9
Long-term average
0.3 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Trib of River Piddle(S) 1 0.7 no change 100%
Orchard Road CSO
Overflow on sewer network
Company site name
BRISTOL KINGSWOOD ORCHARD ROAD
EA ID / permit
WXW00829 · 101760
Outlet location
ST6672572837 (OS grid reference) · View on Apple Maps
WFD catchment
Siston Bk - source to conf R Avon (Brist) (GB109053027450)
2024 spills / hours
9 / 1.1
Long-term average
7.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
Siston Brook via SWS 5 0.7 down 44% 96%
Wellsway
Overflow on sewer network
Company site name
BATH WELLSWAY JUNCTION WITH KIPLING AVE
EA ID / permit
WXW01209 · 101922
Outlet location
ST7391065090 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
8 / 1.1
Long-term average
9.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Avon (S) 11 0.7 up 38% 100%
Bath Private Lane Rear 50 Beckhampton Road
Overflow on sewer network
EA ID / permit
WXW00118 · Permit applied for
Outlet location
ST7391065090 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
7 / 1.5
Long-term average
6.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.7 hours spilling →
River Avon 7 0.7 no change 100%
North of Carpet Factory CSO
Overflow on sewer network
Company site name
FROME NORTH OF CARPET FACTORY NEAR RAILWAY JUNCTION
EA ID / permit
WXW00805 · 102703
Outlet location
ST7859247954 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Maiden Bradley to Mells) (GB109053022101)
2024 spills / hours
5 / 1.4
Long-term average
6.4 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.6 hours spilling →
River Frome 4 0.6 down 20% 100%
Bristol Hollyguest Road O/S 16
Overflow on sewer network
EA ID / permit
WXW01309 · Permit applied for
Outlet location
ST6289572185 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
2 / 0.9
Long-term average
3.0 spills a year (monitored since 2024)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
River Avon 4 0.6 up 100% 100%
55 Preston Grove CSO
Overflow on sewer network
Company site name
YEOVIL PRESTON GROVE O/S 55
EA ID / permit
WXW00887 · EPRAP3922GF
Outlet location
ST5463416018 (OS grid reference) · View on Apple Maps
WFD catchment
Dodham Brook (Yeo (Somset)) (GB108052015600)
2024 spills / hours
0 / 0.0
Long-term average
0.7 spills a year (monitored since 2023)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
Tributary of the River Yeo 1 0.6 up from 0 100%
Whitby Road Embankment PS
Storm discharge at pumping station
Company site name
BRISTOL WHITBY ROAD B CO-OP DEPOT ARNOS VALE
EA ID / permit
WXW01248 · 021674
Outlet location
ST6117671958 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
3 / 2.6
Long-term average
1.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
River Avon (Estuarine) 1 0.6 down 67% 100%
Hillcrest Road Pumpimg Station
Storm discharge at pumping station
Company site name
WYKE REGIS HILLCREST ROAD
EA ID / permit
WXW00540 · 402476
Outlet location
SY6738277127 (OS grid reference) · View on Apple Maps
WFD catchment
Portland Harbour (GB680805270000)
Bathing water
Portland Harbour Castle Cove; Portland Harbour Sandsfoot Castle
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
0 / 0.0
Long-term average
1.2 spills a year (monitored since 2017)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.6 hours spilling →
Portland Harbour 1 0.6 up from 0 100%
Feltham Drive CSO
Overflow on sewer network
Company site name
FROME FELTHAM DRIVE NEAR FOOTBRIDGE
EA ID / permit
WXW00420 · 100439
Outlet location
ST7787547072 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Maiden Bradley to Mells) (GB109053022101)
2024 spills / hours
5 / 0.5
Long-term average
15.4 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.6 hours spilling →
Adderwell Brook 13 0.6 up 160% 100%
Station Road CSO
Overflow on sewer network
Company site name
BRISTOL STATION ROAD R/O 198 CHELTENHAM ROAD (CUTTERS MILLS CULVERT)
EA ID / permit
WXW01055 · 100877
Outlet location
ST5616074420 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
4 / 0.8
Long-term average
2.5 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.6 hours spilling →
River Avon 3 0.6 down 25% 100%
Cleveland Bridge CSO
Overflow on sewer network
Company site name
BATH CLEVELAND BRIDGE TO THE WEST
EA ID / permit
WXW00301 · 010862
Outlet location
ST7531465649 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
16 / 7.1
Long-term average
13.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
River Avon 7 0.5 down 56% 100%
Taunton Market CSO
Overflow on sewer network
Company site name
TAUNTON MARKET
EA ID / permit
WXW01104 · EPRJB3796RN
Outlet location
ST2307525314 (OS grid reference) · View on Apple Maps
WFD catchment
Tone Ds Taunton (GB108052015482)
2024 spills / hours
34 / 335
Long-term average
11.4 spills a year (monitored since 2019)
Monitor below 90%
Sensor failure / issue · Resolved - Feb
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
River Tone 1 0.5 down 97% 88%
Baytree Allotments CSO
Overflow on sewer network
Company site name
BATH BAYTREE ROAD ALLOTMENTS R/O NO 28
EA ID / permit
WXW00117 · 103603
Outlet location
ST7625066580 (OS grid reference) · View on Apple Maps
WFD catchment
Lam Bk - source to conf R Avon (Brist) (GB109053022300)
2024 spills / hours
11 / 0.8
Long-term average
9.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Lam Brook via SWS 8 0.5 down 27% 100%
Speedwell Road Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL SPEEDWELL ROAD / VENTNOR ROAD
EA ID / permit
WXW01027 · 101797
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
7 / 2.1
Long-term average
5.8 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.5 hours spilling →
River Avon (E) via SWS 6 0.5 down 14% 100%
82 Charlton Road Combined Sewer
Overflow on sewer network
Company site name
BRISTOL CHARLTON ROAD O/S NO 82
EA ID / permit
WXW00052 · 103308
Outlet location
ST5612074458 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
7 / 1.5
Long-term average
4.7 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
River Avon via SWS (Estuarine) 5 0.5 down 29% 100%
Ashley Road Combined Sewer Overflow
Overflow on sewer network
Company site name
BOURNEMOUTH ASHLEY ROAD JNC WILSON ROAD
EA ID / permit
WXW00087 · 042745
Outlet location
SZ1313393813 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
2024 spills / hours
2 / 0.2
Long-term average
2.4 spills a year (monitored since 2021)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Trib of River Stour(S) 1 0.5 down 50% 100%
Bath Road (No 2) CSO
Overflow on sewer network
Company site name
BRISTOL FLOWERS HILL TRADING ESTATE
EA ID / permit
WXW00110 · 100582/CS/01
Outlet location
ST6199270650 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
11 / 1.1
Long-term average
11.0 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Brislington Brook via SWS 6 0.5 down 45% 98%
Bridge Way CSO
Overflow on sewer network
Company site name
FRAMPTON COTTERELL ST PETERS CHURCH (SE) BRIDGE WAY
EA ID / permit
WXW00176 · 101033
Outlet location
ST6675681889 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - conf Laddon Bk to conf Folly Bk (GB109053027820)
2024 spills / hours
6 / 8.8
Long-term average
8.2 spills a year (monitored since 2020)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.5 hours spilling →
River Frome 4 0.5 down 33% 100%
Welton Storm Relief Overflow
Overflow on sewer network
Company site name
MIDSOMER NORTON WELTON SO
EA ID / permit
WXW01213 · 021351
Outlet location
ST6650054800 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - source to conf Snails Bk (GB109053022250)
2024 spills / hours
13 / 1.3
Long-term average
8.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Trib of Midford Brook (S) 7 0.5 down 46% 100%
Midford Combined Sewer Overflow
Overflow on sewer network
Company site name
MIDFORD ADJ ABANDONED RAILWAY
EA ID / permit
WXW00719 · 100501/CS/01
Outlet location
ST7612860824 (OS grid reference) · View on Apple Maps
WFD catchment
Wellow Bk - Snails Bk to Bristol Avon (GB109053022271)
2024 spills / hours
4 / 3.5
Long-term average
3.4 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Midford Brook 2 0.5 down 50% 100%
Baltonsborough(Main)Pumping Station
Storm discharge at pumping station
Company site name
BALTONSBOROUGH MAIN 2
EA ID / permit
WXW00101 · 103055
Outlet location
ST5433034790 (OS grid reference) · View on Apple Maps
WFD catchment
Brue - Tootle Bridge to Clyse Hole (GB108052021182)
2024 spills / hours
2 / 2.8
Long-term average
2.0 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.5 hours spilling →
The Mill Stream(S) 1 0.5 down 50% 100%
Bournemouth - Watcombe Road - Combined Sewer Overflow
Overflow on sewer network
EA ID / permit
WXW01319 · Unpermitted
Outlet location
SZ1465892514 (OS grid reference) · View on Apple Maps
WFD catchment
CHRISTCHURCH HARBOUR (GB520804315900)
Bathing water
Christchurch Avon Beach; Christchurch Friar`s Cliff
2024 spills / hours
– / –
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
River Stour 1 0.5 100%
St Johns Lane CSO
Overflow on sewer network
Company site name
BRISTOL ST JOHNS LANE
EA ID / permit
WXW01039 · 101671
Outlet location
ST5849170828 (OS grid reference) · View on Apple Maps
WFD catchment
The Malago - source to conf R Avon (Brist New Cut) (GB109053021970)
2024 spills / hours
4 / 1.0
Long-term average
3.0 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 0.5 hours spilling →
The Malago (S) 2 0.5 down 50% 97%
Newstead Road Pumping Station
Storm discharge at pumping station
Company site name
WEYMOUTH KNIGHTSDALE NEWSTEAD ROAD
EA ID / permit
WXW00797 · 400892
Outlet location
SY6758078730 (OS grid reference) · View on Apple Maps
WFD catchment
WEY (GB510804415700)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2024)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.5 hours spilling →
Weymouth Harbour(E) 1 0.5 up from 0 100%
Burchells Green Road CSO
Overflow on sewer network
Company site name
BRISTOL BURCHILLS GREEN ROAD O/S NO 164
EA ID / permit
WXW00212 · 101247
Outlet location
ST6364374489 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
8 / 1.4
Long-term average
5.7 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 0.4 hours spilling →
Coombe Brook via SWS 6 0.4 down 25% 100%

Sewage treatment works

Storm tanks and inlet overflows at each Wessex 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.