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
Portishead Poacher Hotel (Anchor Hotel)
Storm discharge at pumping station
EA ID / permit
WXW01304 · Unpermitted
Outlet location
ST4706676149 (OS grid reference) · View on Apple Maps
WFD catchment
Portbury Ditch - source to conf R Severn Estuary (GB10905202733)
2024 spills / hours
5 / 5.9
Long-term average
7.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 11 hours spilling →
Portbury Ditch 6 11 up 20% 100%
Pound Lane CSO
Overflow on sewer network
Company site name
BRADFORD-ON-AVON CULVER STREET RECREATION PARK
EA ID / permit
WXW00884 · 101650
Outlet location
ST8223160505 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (Semington Bk to By Bk) (GB109053027372)
2024 spills / hours
54 / 276
Long-term average
53.0 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 11 hours spilling →
River Avon 4 11 down 93% 100%
Westbury Road Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL CANFORD ROAD / CANFORD LANE
EA ID / permit
WXW01232 · 013105
Outlet location
ST5673777541 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
18 / 15
Long-term average
15.0 spills a year (monitored since 2020)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 11 hours spilling →
River Trym via SWS 10 11 down 44% 100%
Brislington Hill CSO
Overflow on sewer network
Company site name
BRISTOL BRISLINGTON HILL/BRISTOL HILL JNC.
EA ID / permit
WXW00183 · 012935
Outlet location
ST6198070709 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
24 / 45
Long-term average
16.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
Brislington Brook via SWS 11 10 down 54% 100%
Bristol O/S 168 Station Road
Overflow on sewer network
EA ID / permit
WXW00010 · Unpermitted
Outlet location
ST6103078900 (OS grid reference) · View on Apple Maps
WFD catchment
Stoke Bk - source to conf Bradley Bk (GB109053027540)
2024 spills / hours
18 / 39
Long-term average
16.7 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
SWS-New Road Brook-Stoke Brook 7 10 down 61% 97%
Whatcombe Road CSO
Overflow on sewer network
Company site name
FROME WHATCOMBE ROAD NO 20
EA ID / permit
WXW01245 · 100441
Outlet location
ST7732348617 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Maiden Bradley to Mells) (GB109053022101)
2024 spills / hours
45 / 25
Long-term average
38.0 spills a year (monitored since 2019)
High-spill reason (company)
Not Applicable - Ongoing investigation
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
River Frome via SWS 31 10 down 31% 100%
Poole Park CSO
Overflow on sewer network
Company site name
POOLE PARK ATTENUATION TANK
EA ID / permit
WXW00869 · 400457
Outlet location
SZ0252890989 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
6 / 9.0
Long-term average
4.2 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
Poole Park Boating Lake 6 10 no change 100%
High Street SSO
Overflow on sewer network
Company site name
SALISBURY BRIDGE STREET/HIGH STREET
EA ID / permit
WXW00533 · 043197
Outlet location
SU1512429408 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (Middle) (GB108043015841)
2024 spills / hours
30 / 87
Long-term average
19.7 spills a year (monitored since 2023)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 10 hours spilling →
River Avon via Sw Sewer 7 10 down 77% 100%
J Hughes Cottage CSO
Overflow on sewer network
Company site name
BATH CAR PARK ADJ J HUGHES COTTAGE
EA ID / permit
WXW00583 · 103903
Outlet location
ST7624366614 (OS grid reference) · View on Apple Maps
WFD catchment
Lam Bk - source to conf R Avon (Brist) (GB109053022300)
2024 spills / hours
20 / 52
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 10 hours spilling →
Lam Brook 7 10 down 65% 100%
Herston Cross Attenuation Tank CSO
Overflow on sewer network
Company site name
SWANAGE HERSTON CROSS ATTENUATION TANK
EA ID / permit
WXW00528 · 402255
Outlet location
SZ0173079090 (OS grid reference) · View on Apple Maps
WFD catchment
Swan (Swanage) (GB108044009920)
Bathing water
Swanage Central
2024 spills / hours
3 / 9.7
Long-term average
3.4 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
Trib of River Swan(S) 6 10 up 100% 100%
Sheppard Road CSO
Overflow on sewer network
Company site name
BRISTOL SHEPPARD ROAD INTERCEPTOR
EA ID / permit
WXW00981 · EPRNB3334AG
Outlet location
ST6383876803 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
4 / 29
Long-term average
2.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 10 hours spilling →
Trib of River Frome via SWS 2 10 down 50% 100%
Wood Road Combined Sewer Overflow
Overflow on sewer network
Company site name
BRISTOL KINGSWOOD WOOD ROAD
EA ID / permit
WXW01277 · 101751
Outlet location
ST6403073340 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
34 / 22
Long-term average
27.3 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.9 hours spilling →
Strad Brook via SWS 19 9.9 down 44% 100%
Cattle Market Road Siphon CSO
Overflow on sewer network
Company site name
BRISTOL CATTLE MARKET ROAD SIPHON
EA ID / permit
WXW00237 · 102829
Outlet location
ST5991872268 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
15 / 34
Long-term average
10.0 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.9 hours spilling →
River Avon (Estuarine) 5 9.9 down 67% 100%
Millfield School PS
Storm discharge at pumping station
Company site name
GLASTONBURY EDGARLEY MILLFIELD SCHOOL
EA ID / permit
WXW00740 · 102378
Outlet location
ST5197037680 (OS grid reference) · View on Apple Maps
WFD catchment
Coxbridge Brook( Brue) (GB108052021130)
2024 spills / hours
4 / 18
Long-term average
6.8 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.8 hours spilling →
Trib of Upper River Brue 3 9.8 down 25% 100%
Bournemouth Maxwell Road
Overflow on sewer network
EA ID / permit
WXW00768 · Permit applied for
Outlet location
SZ1333593666 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
Bathing water
Christchurch Avon Beach; Christchurch Friar`s Cliff
2024 spills / hours
31 / 13
Long-term average
27.7 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.7 hours spilling →
River Stour 23 9.7 down 26% 95%
The Tarters CSO
Overflow on sewer network
Company site name
SHERSTON THE TARTARS
EA ID / permit
WXW01130 · 102886
Outlet location
ST8562885726 (OS grid reference) · View on Apple Maps
WFD catchment
Sherston Avon (GB109053027690)
2024 spills / hours
39 / 16
Long-term average
31.9 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.7 hours spilling →
River Avon (Sherston Branch) 24 9.7 down 38% 99%
New Road Combined Sewer Overflow
Overflow on sewer network
Company site name
STOKE GIFFORD NEW ROAD ALONG SIDE NO 177
EA ID / permit
WXW00790 · 101681
Outlet location
ST6187380229 (OS grid reference) · View on Apple Maps
WFD catchment
Stoke Bk - source to conf Bradley Bk (GB109053027540)
2024 spills / hours
3 / 14
Long-term average
0.8 spills a year (monitored since 2021)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.6 hours spilling →
Trib of Stoke Brook via SWS 1 9.6 down 67% 100%
Fairview Pumping Station
Storm discharge at pumping station
Company site name
POOLE FAIRVIEW ROAD
EA ID / permit
WXW00416 · 401394
Outlet location
SZ0050096390 (OS grid reference) · View on Apple Maps
WFD catchment
Stour (Lower) (GB108043011040)
2024 spills / hours
4 / 10
Long-term average
5.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.5 hours spilling →
Trib of River Stour(S) 4 9.5 no change 100%
Admiral Hardy CSO
Overflow on sewer network
Company site name
WEYMOUTH CHICKERELL ROAD O/S ALLOTMENTS NEAR THE ADMIRAL HARDY
EA ID / permit
WXW00063 · 400903
Outlet location
SY6758078730 (OS grid reference) · View on Apple Maps
WFD catchment
WEY (GB510804415700)
Bathing water
Weymouth Central
Shellfish water
Portland Harbour East; Portland Harbour West
2024 spills / hours
11 / 31
Long-term average
7.2 spills a year (monitored since 2020)
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.4 hours spilling →
Weymouth Harbour(E) 6 9.4 down 45% 88%
Queen Street CSO
Overflow on sewer network
Company site name
BRISTOL QUEEN STREET O/S NO 2
EA ID / permit
WXW00903 · 101796
Outlet location
ST5611874456 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
39 / 21
Long-term average
36.0 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 9.4 hours spilling →
River Avon (E) via SWS 26 9.4 down 33% 100%
Union Lane CSO
Overflow on sewer network
Company site name
WILLITON UNION LANE SO
EA ID / permit
WXW01166 · 102306
Outlet location
ST0817041740 (OS grid reference) · View on Apple Maps
WFD catchment
Doniford Stream (GB108051020250)
2024 spills / hours
20 / 17
Long-term average
14.3 spills a year (monitored since 2020)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.4 hours spilling →
Trib of Donniford Stream (S) 9 9.4 down 55% 96%
Central Avenue Combined Sewer of
Overflow on sewer network
Company site name
BRISTOL HANHAM CENTRAL AVENUE
EA ID / permit
WXW00240 · 101754
Outlet location
ST6433670901 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
20 / 9.2
Long-term average
15.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.3 hours spilling →
Trib of River Avon via SWS 15 9.3 down 25% 97%
37 Endless Street CSO
Overflow on sewer network
Company site name
SALISBURY ENDLESS LANE/SCOTS LANE
EA ID / permit
WXW00028 · 043196
Outlet location
SU1512529408 (OS grid reference) · View on Apple Maps
WFD catchment
Hampshire Avon (Middle) (GB108043015841)
2024 spills / hours
42 / 26
Long-term average
32.2 spills a year (monitored since 2021)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.3 hours spilling →
River Avon via SWS 22 9.3 down 48% 100%
Anstey'S Rd CSO
Overflow on sewer network
Company site name
HANHAM ANSTEYS ROAD
EA ID / permit
WXW00084 · 103355
Outlet location
ST6346071800 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
22 / 16
Long-term average
20.3 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 9.3 hours spilling →
River Avon(E) 17 9.3 down 23% 100%
Wadmore Lane Pumping Station
Storm discharge at pumping station
Company site name
STUDLAND WADMORE LANE
EA ID / permit
WXW01179 · 401418
Outlet location
SZ0298083190 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
3 / 5.1
Long-term average
5.4 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 9.2 hours spilling →
Tributary of Little Sea 4 9.2 up 33% 100%
Pennington Copse Pumping Station
Storm discharge at pumping station
Company site name
WEST MOORS PENNINGTON COPSE
EA ID / permit
WXW00854 · 400645
Outlet location
SU0777402370 (OS grid reference) · View on Apple Maps
WFD catchment
Uddens Water (GB108043011080)
2024 spills / hours
4 / 33
Long-term average
3.4 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.2 hours spilling →
Trib of Uddens Water 3 9.2 down 25% 100%
Littleton Panell Cornbury Mill
Overflow on sewer network
EA ID / permit
WXW00770 · Permit applied for
Outlet location
SU0059453907 (OS grid reference) · View on Apple Maps
WFD catchment
Semington Bk - source to conf Worton Str (GB109053022130)
2024 spills / hours
21 / 30
Long-term average
19.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.1 hours spilling →
Semington Brook 9 9.1 down 57% 100%
Halse STW
Inlet overflow at sewage works
Sewage works
Halse
Company site name
HALSE INLET
EA ID / permit
WXW00493 · 012751
Outlet location
ST1424028000 (OS grid reference) · View on Apple Maps
WFD catchment
Halse WTR (GB108052021380)
2024 spills / hours
24 / 29
Long-term average
19.5 spills a year (monitored since 2024)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 9.0 hours spilling →
Tributary of Halse Water(S) 15 9.0 down 38% 100%
Sandford Batch PS
Storm discharge at pumping station
Company site name
SANDFORD BATCH
EA ID / permit
WXW00956 · 103602
Outlet location
ST4181558833 (OS grid reference) · View on Apple Maps
WFD catchment
Oldbridge R - source to nr Manor Fm (GB109052021620)
2024 spills / hours
7 / 32
Long-term average
4.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 9.0 hours spilling →
Towerhead Brook 5 9.0 down 29% 100%
Stapleton Rd and Glenfrome Rd CSO
Overflow on sewer network
Company site name
BRISTOL STAPLETON ROAD / GLENFROME ROAD
EA ID / permit
WXW01052 · 101747
Outlet location
ST6115175638 (OS grid reference) · View on Apple Maps
WFD catchment
Frome (Brist) - Bradley Bk to conf Floating Hbr (GB109053027840)
2024 spills / hours
49 / 34
Long-term average
31.6 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.9 hours spilling →
River Frome 27 8.9 down 45% 96%
The Well House CSO
Overflow on sewer network
Company site name
STOKE SUB HAMDON WINDSOR LANE
EA ID / permit
WXW01131 · 100710
Outlet location
ST4849717533 (OS grid reference) · View on Apple Maps
WFD catchment
Wellhams Brook (GB108052015350)
2024 spills / hours
7 / 7.1
Long-term average
7.3 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
Operational improvement completed
Volume & pollution
Estimate from 8.7 hours spilling →
Trib of Wellhams Brook 9 8.7 up 29% 99%
250 Henleaze Road CSO
Overflow on sewer network
Company site name
BRISTOL HENLEAZE ROAD OPP 1 PYCROFT AVE
EA ID / permit
WXW00022 · 100473
Outlet location
ST5801977357 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
22 / 9.6
Long-term average
18.0 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 8.7 hours spilling →
Trib of River Trym via SWS 16 8.7 down 27% 100%
Beckhampton Road CSO
Overflow on sewer network
Company site name
BATH BECKHAMPTON ROAD O/S NO 50
EA ID / permit
WXW00119 · 102606
Outlet location
ST7391065090 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
39 / 30
Long-term average
25.1 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 8.6 hours spilling →
River Avon via SWS 21 8.6 down 46% 100%
Middle Brooks Road Pumping Station
Storm discharge at pumping station
Company site name
STREET MIDDLE BROOKS ROAD
EA ID / permit
WXW00717 · 100744
Outlet location
ST4772035272 (OS grid reference) · View on Apple Maps
WFD catchment
South Drain (GB108052021181)
2024 spills / hours
8 / 57
Long-term average
5.4 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.6 hours spilling →
(S) Trib of Bullmead Ditch 3 8.6 down 63% 98%
Pumping Station at Bristol Road
Storm discharge at pumping station
Company site name
BRIDGWATER BRISTOL ROAD
EA ID / permit
WXW00187 · 082162
Outlet location
ST3063038490 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Burnham Jetty North
2024 spills / hours
17 / 29
Long-term average
8.2 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.5 hours spilling →
River Parrett (Estuarine) 8 8.5 down 53% 100%
Mill House
Overflow on sewer network
Company site name
BATHEASTON MILL HOUSE
EA ID / permit
WXW00728 · 021669
Outlet location
ST7785067930 (OS grid reference) · View on Apple Maps
WFD catchment
St Catherines Bk - source to conf R Avon (Brist) (GB109053027810)
2024 spills / hours
30 / 48
Long-term average
18.8 spills a year (monitored since 2019)
Monitor below 90%
Telemetry or data archiving failure / issue · Scheduled
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.3 hours spilling →
Trib of River Bristol Avon 10 8.3 down 67% 76%
Stoborough Ridge Pumping Station
Storm discharge at pumping station
Company site name
STOBOROUGH RIDGE
EA ID / permit
WXW01063 · 401423
Outlet location
SY9376086635 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Shellfish water
Poole Bay; Poole Harbour North; Poole Harbour South; Poole Harbour West
2024 spills / hours
10 / 39
Long-term average
2.7 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.3 hours spilling →
Tributary of River Frome 3 8.3 down 70% 100%
Hillcommon Pumping Station
Storm discharge at pumping station
Company site name
HILLCOMMON HILL COMMON
EA ID / permit
WXW00539 · NPSWQD003671
Outlet location
ST1525826020 (OS grid reference) · View on Apple Maps
WFD catchment
Tone - Wellington to Taunton (GB108052015481)
2024 spills / hours
9 / 15
Long-term average
9.2 spills a year (monitored since 2021)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.3 hours spilling →
Tributary of River Tone 5 8.3 down 44% 100%
Somerdale Av Spring Gardens CSO
Overflow on sewer network
Company site name
BRISTOL SOMERDALE AVENUE / SPRING GARDENS
EA ID / permit
WXW01005 · 100575/CS/01
Outlet location
ST6027469895 (OS grid reference) · View on Apple Maps
WFD catchment
Brislington Bk - source to conf R Avon (Brist) (GB109053021980)
2024 spills / hours
28 / 22
Long-term average
18.8 spills a year (monitored since 2022)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.2 hours spilling →
Brislington Brook via SWS 14 8.2 down 50% 100%
Bridge Place Road CSO
Overflow on sewer network
Company site name
CAMERTON BRIDGE PLACE ROAD MH D19
EA ID / permit
WXW00174 · 013268
Outlet location
ST6826157822 (OS grid reference) · View on Apple Maps
WFD catchment
Cam Bk - source to conf Wellow Bk (GB109053022290)
2024 spills / hours
16 / 40
Long-term average
7.1 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.2 hours spilling →
Cam Brook 5 8.2 down 69% 100%
Hudds Vale Road CSO
Overflow on sewer network
Company site name
BRISTOL HUDDS VALE ROAD / PLUMERS HILL
EA ID / permit
WXW00566 · 103311
Outlet location
ST5612274459 (OS grid reference) · View on Apple Maps
WFD catchment
BRISTOL AVON (GB530905415405)
2024 spills / hours
34 / 22
Long-term average
26.0 spills a year (monitored since 2022)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 8.1 hours spilling →
River Avon via SWS (Estuarine) 28 8.1 down 18% 100%
Shirehampton Road CSO
Overflow on sewer network
Company site name
BRISTOL SHIREHAMPTON ROAD NO 100
EA ID / permit
WXW00989 · 100455
Outlet location
ST5539076610 (OS grid reference) · View on Apple Maps
WFD catchment
Trym - source to conf R Avon (Brist) (GB109053027530)
2024 spills / hours
28 / 7.0
Long-term average
29.3 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing, Operational improvement completed
Volume & pollution
Estimate from 8.0 hours spilling →
River Trym via SWS 29 8.0 up 4% 99%
New Swanage Attenuation Tank
Overflow on sewer network
Company site name
SWANAGE SHORE ROAD O/S NURSING HOME
EA ID / permit
WXW00793 · 400033/CS/01
Outlet location
SZ0309079640 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
Bathing water
Swanage Central
2024 spills / hours
10 / 28
Long-term average
9.6 spills a year (monitored since 2017)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 8.0 hours spilling →
Ulwell Stream 4 8.0 down 60% 100%
Charlton Road CSO
Overflow on sewer network
Company site name
KEYNSHAM CHARLTON ROAD O/S 138
EA ID / permit
WXW00255 · 102127
Outlet location
ST6472068950 (OS grid reference) · View on Apple Maps
WFD catchment
Bristol Avon (By Bk to Netham Weir) (GB109053027371)
2024 spills / hours
16 / 24
Long-term average
9.4 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 7.9 hours spilling →
Charlton Bottom via SWS 7 7.9 down 56% 100%
Cleve Court 2 CSO
Overflow on sewer network
Company site name
BRISTOL CLEVE COURT FILTON
EA ID / permit
WXW00297 · 101680
Outlet location
ST6074079980 (OS grid reference) · View on Apple Maps
WFD catchment
Stoke Bk - source to conf Bradley Bk (GB109053027540)
2024 spills / hours
1 / 0.8
Long-term average
8.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 7.9 hours spilling →
Stoke Brook (S) 7 7.9 up 600% 100%
Bridge Valley Road CSO
Overflow on sewer network
Company site name
BRISTOL VALLEY ROAD ZIG ZAG PATH BRIDGE
EA ID / permit
WXW00175 · 101075
Outlet location
ST5629373768 (OS grid reference) · View on Apple Maps
WFD catchment
Not part of a river WB catchment
2024 spills / hours
26 / 15
Long-term average
25.7 spills a year (monitored since 2019)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing, Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 7.8 hours spilling →
River Avon (Estuarine) via SWS 17 7.8 down 35% 100%
Priory Hospital CSO
Overflow on sewer network
Company site name
WELLS PRIORY HOSPITAL IN THE REAR GARDEN NEAR WEIR
EA ID / permit
WXW00890 · 100749
Outlet location
ST5425545263 (OS grid reference) · View on Apple Maps
WFD catchment
Keward Brook (GB108052021240)
2024 spills / hours
16 / 32
Long-term average
16.9 spills a year (monitored since 2019)
Investigation
Operational investigation completed
Improvement
Operational improvement completed
Volume & pollution
Estimate from 7.8 hours spilling →
St Andrews Stream 12 7.8 down 25% 100%
Wareham Combined Sewer Overflow
Overflow on sewer network
Company site name
WAREHAM ABBOTTS QUAY
EA ID / permit
WXW01189 · 051049
Outlet location
SY9229887168 (OS grid reference) · View on Apple Maps
WFD catchment
POOLE HARBOUR (GB520804415800)
2024 spills / hours
5 / 6.1
Long-term average
7.8 spills a year (monitored since 2018)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 7.7 hours spilling →
River Frome (Estuarine) 6 7.7 up 20% 100%
Burton Bradstock
Overflow on sewer network
Company site name
BURTON BRADSTOCK GROVE ROAD
EA ID / permit
WXW00213 · 401868
Outlet location
SY4894089630 (OS grid reference) · View on Apple Maps
WFD catchment
Bride (GB108044009550)
2024 spills / hours
12 / 42
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 7.7 hours spilling →
River Bride(S) 4 7.7 down 67% 100%
Slade Road/Combe Road CSO
Overflow on sewer network
Company site name
PORTISHEAD SLADE ROAD O/S 47
EA ID / permit
WXW00999 · 100558/CS/01
Outlet location
ST4701076250 (OS grid reference) · View on Apple Maps
WFD catchment
Portbury Ditch - source to conf R Severn Estuary (GB109052027330)
2024 spills / hours
16 / 5.5
Long-term average
14.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 7.6 hours spilling →
Tributary of Portbury Ditch 12 7.6 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.