Storm overflow register · 2025 annual return

Southern Water storm overflows, 2025

Southern Water reported 977 storm overflows in England for 2025. Together they recorded 15,554 spills over 114,868 hours, an average of 15.9 spills per overflow against 20.4 across England. That ranks 4 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 47% on 2024.

175 overflows did not spill · 42 spilled more than 60 times · 862 had monitors working for 90% of the year or more · 215 sewage treatment works with overflows

Hours spilling by month, 2025

010k20k30k40kJan 2025: 38,729 hours spillingJanFeb 2025: 17,875 hours spillingFebMar 2025: 4,010 hours spillingMarApr 2025: 1,990 hours spillingAprMay 2025: 746 hours spillingMayJun 2025: 804 hours spillingJunJul 2025: 2,044 hours spillingJulAug 2025: 883 hours spillingAugSep 2025: 4,161 hours spillingSepOct 2025: 8,831 hours spillingOctNov 2025: 6,321 hours spillingNovDec 2025: 28,488 hours spillingDec
Hours spilling, all Southern Water overflows, from the start/stop records. Spills running across a month end are split between the months.

All Southern 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
89 Queens Cottages CSO
Overflow on sewer network
Company site name
QUEENS COTTAGES WADHURST OUTSIDE 89 CSO - 108318
EA ID / permit
SWS00003 · A01428
Outlet location
TQ6326032600 (OS grid reference) · View on Apple Maps
WFD catchment
Bartley Mill Stream (GB106040018240)
2024 spills / hours
0 / 0.0
Long-term average
7.5 spills a year (monitored since 2019)
Monitor below 90%
Sensor failure / issue · Scheduled
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
A Trib of Bartley Mill Stream – – 0%
Albion CSO
Storm discharge at pumping station
Company site name
ALBION GROYNE BRIGHTON CEO - 111086
EA ID / permit
SWS00007 · A00842
Outlet location
TQ3133003790 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Brighton Central; Brighton Kemptown; Hove
2024 spills / hours
0 / 0.0
Long-term average
0.1 spills a year (monitored since 2016)
Investigation
Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Controlled Sea 0 0.0 no change 100%
Albion Place Maidstone CSO
Overflow on sewer network
Company site name
ALBION PLACE MAIDSTONE CSO - 108575
EA ID / permit
SWS00008 · A01466
Outlet location
TQ7648055620 (OS grid reference) · View on Apple Maps
WFD catchment
Len (GB106040018430)
2024 spills / hours
1 / 0.3
Long-term average
1.9 spills a year (monitored since 2017)
Monitor below 90%
Sensor failure / issue · Resolved - Dec
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Len 0 0.0 down 100% 50%
Alverstone PS
Storm discharge at pumping station
Company site name
ALVERSTONE SHUTE ALVERSTONE CEO - 108509
EA ID / permit
SWS00015 · A00219
Outlet location
SZ5772085630 (OS grid reference) · View on Apple Maps
WFD catchment
Eastern Yar (Lower) (GB107101005971)
Bathing water
St Helens
2024 spills / hours
10 / 69
Long-term average
5.4 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Eastern Yar 0 0.0 down 100% 100%
Anton Lane Ceo
Storm discharge at pumping station
Company site name
ANTON LANE ANDOVER CEO - 107999
EA ID / permit
SWS00018 · A01287
Outlet location
SU3609044990 (OS grid reference) · View on Apple Maps
WFD catchment
R. Anton (GB107042022810)
2024 spills / hours
1 / 1.0
Long-term average
0.4 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Anton 0 0.0 down 100% 100%
Attlee Way Grovehurst Wwps
Storm discharge at pumping station
Company site name
ATTLEE WAY GROVEHURST CEO - 108648
EA ID / permit
SWS00032 · A01344
Outlet location
TQ9065065790 (OS grid reference) · View on Apple Maps
WFD catchment
SWALE (GB530604011500)
2024 spills / hours
0 / 0.0
Long-term average
0.1 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Milton Creek via Drain 0 0.0 no change 100%
Beach Road CSO, Newhaven
Inlet overflow at sewage works
Sewage works
Beach Road Newhaven
Company site name
BEACH ROAD NEWHAVEN CSO - 108085
EA ID / permit
SWS00048 · A01188
Outlet location
TQ4499000760 (OS grid reference) · View on Apple Maps
WFD catchment
OUSE (GB540704104900)
Bathing water
Seaford
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Ouse (Estuary) 0 0.0 no change 91%
Black Rock Wastewater Pumping Statn
Storm discharge at pumping station
Company site name
BLACK ROCK BRIGHTON CEO - 109383
EA ID / permit
SWS00068 · A01243
Outlet location
TQ3318003260 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Brighton Central; Brighton Kemptown
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2016)
Investigation
Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
The English Channel 0 0.0 no change 100%
Bockhanger Ceo
Storm discharge at pumping station
Company site name
BOCKHANGER CEO - 108806
EA ID / permit
SWS00075 · A01021
Outlet location
TR0110043820 (OS grid reference) · View on Apple Maps
WFD catchment
Great Stour between Ashford and Wye (GB107040019741)
2024 spills / hours
1 / 3.5
Long-term average
2.9 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Bockhanger Dyke 0 0.0 down 100% 100%
Botley Road Wps (North Baddesley)
Storm discharge at pumping station
Company site name
BOTLEY ROAD NORTH BADDESLEY CEO - 108398
EA ID / permit
SWS00082 · A01144
Outlet location
SU3885020460 (OS grid reference) · View on Apple Maps
WFD catchment
Tadburn Lake (GB107042016490)
2024 spills / hours
2 / 2.8
Long-term average
0.2 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tributary of the Tadburn Lake 0 0.0 down 100% 100%
Boxley Road Maidstone CSO
Overflow on sewer network
Company site name
BOXLEY ROAD MAIDSTONE CSO - 108590
EA ID / permit
SWS00087 · A01331
Outlet location
TQ7567056190 (OS grid reference) · View on Apple Maps
WFD catchment
Medway at Maidstone (GB106040018440)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Dec
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
A Trib of the River Medway 0 0.0 no change 74%
Bridgefoot Pumping Station
Storm discharge at pumping station
Company site name
BRIDGEFOOT FAREHAM CEO - 108400
EA ID / permit
SWS00095 · A00201
Outlet location
SU5868006100 (OS grid reference) · View on Apple Maps
WFD catchment
PORTSMOUTH HARBOUR (GB580705140000)
Shellfish water
Portsmouth Harbour
2024 spills / hours
6 / 8.4
Long-term average
6.9 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing
Fareham Creek/Portsmouth Hbr 0 0.0 down 100% 100%
Britts Farm Buxted Ceo
Storm discharge at pumping station
Company site name
BRITTS FARM BUXTED CEO - 110192
EA ID / permit
SWS00100 · A01401
Outlet location
TQ5029023240 (OS grid reference) · View on Apple Maps
WFD catchment
Tickerage Stream (GB107041012970)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Trib of Tickerage Stream 0 0.0 no change 100%
Broadmark Pumping Station
Storm discharge at pumping station
Company site name
BROADMARK LANE RUSTINGTON CEO - 107443
EA ID / permit
SWS00104 · A00749
Outlet location
TQ0525001430 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Littlehampton
2024 spills / hours
2 / 2.9
Long-term average
4.0 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Controlled Sea 0 0.0 down 100% 100%
Brook Road Wastewater Pumping
Storm discharge at pumping station
Company site name
BROOK ROAD SWALECLIFFE CEO - 110179
EA ID / permit
SWS00111 · A00777
Outlet location
TR1352067640 (OS grid reference) · View on Apple Maps
WFD catchment
Whitstable Bay (GB640604290000)
Bathing water
Herne Bay Central; Tankerton; West Beach, Whitstable
Shellfish water
Swale East; Swalecliffe
2024 spills / hours
0 / 0.0
Long-term average
1.1 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Freshwater River 0 0.0 no change 100%
Brookside Dairy Wroxall CSO
Overflow on sewer network
Company site name
BROOKSIDE DAIRY WROXALL CSO - 108513
EA ID / permit
SWS00112 · A00990
Outlet location
SZ5513079730 (OS grid reference) · View on Apple Maps
WFD catchment
Wroxall Stream (GB107101006210)
2024 spills / hours
– / –
Long-term average
2.2 spills a year (monitored since 2016)
Monitor below 90%
Installation set-up/design issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Wroxall Stream – – 0%
Brunel Road Wps
Storm discharge at pumping station
Company site name
BRUNEL ROAD REDBRIDGE CEO - 108403
EA ID / permit
SWS00116 · A01145
Outlet location
SU3703013670 (OS grid reference) · View on Apple Maps
WFD catchment
SOUTHAMPTON WATER (GB520704202800)
Shellfish water
Southampton Water
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Test Estuary 0 0.0 no change 100%
Burgess Road Hastings Ceo
Storm discharge at pumping station
Company site name
BURGESS ROAD HASTINGS CEO - 108197
EA ID / permit
SWS00123 · W00036
Outlet location
TQ8316012210 (OS grid reference) · View on Apple Maps
WFD catchment
Doleham Ditch (GB107040013380)
2024 spills / hours
1 / 0.5
Long-term average
1.3 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Ditch Trib of Doleham Ditch 0 0.0 down 100% 100%
Burrfields Road Portsmouth CSO
Overflow on sewer network
Company site name
BURRFIELDS ROAD PORTSMOUTH CSO - 108405
EA ID / permit
SWS00126 · A01386
Outlet location
SU6720002060 (OS grid reference) · View on Apple Maps
WFD catchment
LANGSTONE HARBOUR (GB580705130000)
Bathing water
Eastney; Beachlands West
Shellfish water
Langstone Harbour; Spithead and Stokes Bay
2024 spills / hours
0 / 0.0
Long-term average
0.3 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing
Great Salterns Lake 0 0.0 no change 100%
Bybrook Pumping Station
Storm discharge at pumping station
Company site name
BYBROOK ASHFORD CEO - 108595
EA ID / permit
SWS00132 · A00991
Outlet location
TR0191043590 (OS grid reference) · View on Apple Maps
WFD catchment
Great Stour between Ashford and Wye (GB107040019741)
2024 spills / hours
9 / 87
Long-term average
8.4 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Freshwater River 0 0.0 down 100% 100%
Cams Hill, Fareham CSO
Overflow on sewer network
Company site name
CAMS HILL FAREHAM CSO - 108062
EA ID / permit
SWS00135 · A00332
Outlet location
SU5877006210 (OS grid reference) · View on Apple Maps
WFD catchment
PORTSMOUTH HARBOUR (GB580705140000)
Shellfish water
Portsmouth Harbour
2024 spills / hours
0 / 0.0
Long-term average
10.3 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing
Fareham Creek/Portsmouth Hbr 0 0.0 no change 100%
Canterbury Road South Willesborough
Storm discharge at pumping station
Company site name
CANTERBURY ROAD SOUTH WILLESBOROUGH CEO - 108802
EA ID / permit
SWS00138 · A01327
Outlet location
TR0217040660 (OS grid reference) · View on Apple Maps
WFD catchment
Aylesford Stream (GB107040019650)
2024 spills / hours
6 / 12
Long-term average
2.7 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
A Trib of the East Stour 0 0.0 down 100% 100%
Carnegie Road Worthing CSO
Overflow on sewer network
Company site name
CARNEGIE ROAD WORTHING CSO - 108201
EA ID / permit
SWS00141 · A00958
Outlet location
TQ1660003670 (OS grid reference) · View on Apple Maps
WFD catchment
Teville Stream (GB107041011940)
Bathing water
Lancing, Beach Green; Worthing; Worthing Beach House
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2018)
Investigation
Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
A Trib. of the Teville Stream 0 0.0 no change 100%
Cedar Road Southampton CSO
Overflow on sewer network
Company site name
CEDAR ROAD SOUTHAMPTON CSO - 108782
EA ID / permit
SWS00150 · A01289
Outlet location
SU4309013520 (OS grid reference) · View on Apple Maps
WFD catchment
SOUTHAMPTON WATER (GB520704202800)
Shellfish water
Southampton Water
2024 spills / hours
0 / 0.0
Long-term average
1.0 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Itchen 0 0.0 no change 100%
Chafford Lane Fordcombe Ceo
Storm discharge at pumping station
Company site name
CHAFFORD LANE FORDCOMBE CEO - 108599
EA ID / permit
SWS00153 · A00240
Outlet location
TQ5165040170 (OS grid reference) · View on Apple Maps
WFD catchment
Mid Medway from Hartfield to Eden Confluence (GB106040018181)
2024 spills / hours
3 / 7.9
Long-term average
2.5 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Medway 0 0.0 down 100% 100%
Chalice Court Hedge End Ceo
Storm discharge at pumping station
Company site name
CHALICE COURT HEDGE END CEO - 110309
EA ID / permit
SWS00156 · A01400
Outlet location
SU4862012890 (OS grid reference) · View on Apple Maps
WFD catchment
Horton Heath Stream (GB107042016270)
2024 spills / hours
3 / 2.3
Long-term average
0.5 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Wildern Stream 0 0.0 down 100% 100%
Chalky Bank Road Gillingham CSO
Overflow on sewer network
Company site name
CHALKY BANK ROAD GILLINGHAM CSO - 108600
EA ID / permit
SWS00158 · EPR/DB3797NX
Outlet location
TQ8270067420 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
0 / 0.0
Long-term average
0.3 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The Otterham Creek 0 0.0 no change 100%
Chatham Hill Chatham Outside 10 CSO
Overflow on sewer network
Company site name
CHATHAM HILL CHATHAM OUTSIDE 10 CSO - 108602
EA ID / permit
SWS00165 · A01157
Outlet location
TQ7564068150 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Medway Estuary 0 0.0 no change 50%
Chestfield Storm Tanks
Storm discharge at pumping station
Company site name
GRASMERE ROAD CHESTFIELD STORM TANKS CSO - 108605
EA ID / permit
SWS00168 · A00606
Outlet location
TR1335065830 (OS grid reference) · View on Apple Maps
WFD catchment
Swalecliffe Brook (GB107040019630)
Bathing water
Ventnor; West Beach, Whitstable
Shellfish water
Swale East; Swalecliffe
2024 spills / hours
1 / 4.8
Long-term average
1.1 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing
Improvement
No improvement action in reporting period
Freshwater River 0 0.0 down 100% 100%
Church Road Selsey CSO
Overflow on sewer network
Company site name
CHURCH ROAD SELSEY CSO - 108206
EA ID / permit
SWS00181 · A01247
Outlet location
SZ8572093690 (OS grid reference) · View on Apple Maps
WFD catchment
Broad Rife (GB107041006580)
Bathing water
Selsey
2024 spills / hours
0 / 0.0
Long-term average
0.1 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
English Channel 0 0.0 no change 86%
Churchfield Way Wye Ceo
Storm discharge at pumping station
Company site name
CHURCHFIELD WAY WYE CEO - 108763
EA ID / permit
SWS00182 · A00267
Outlet location
TR0500047060 (OS grid reference) · View on Apple Maps
WFD catchment
Great Stour between Wye and A2 (GB107040019742)
2024 spills / hours
19 / 190
Long-term average
7.9 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The Great Stour 0 0.0 down 100% 99%
Cinque Ports Way Hastings Ceo
Storm discharge at pumping station
Company site name
SEASIDE ROAD HASTINGS NO 1 SSO - 107639
EA ID / permit
SWS00183 · A00795
Outlet location
TQ7851008580 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex East (GB640704540002)
Bathing water
Hastings Pelham Beach; St Leonards
2024 spills / hours
3 / 9.9
Long-term average
1.4 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The English Channel 0 0.0 down 100% 100%
Concord Avenue Chatham CSO
Overflow on sewer network
Company site name
CONCORD AVENUE CHATHAM CSO - 108615
EA ID / permit
SWS00195 · W00590
Outlet location
TQ7540064700 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
2 / 0.7
Long-term average
0.5 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Medway 0 0.0 down 100% 51%
Consort Road Eastleigh CSO
Overflow on sewer network
Company site name
CONSORT ROAD EASTLEIGH CSO - 108416
EA ID / permit
SWS00196 · H01115
Outlet location
SU4592024060 (OS grid reference) · View on Apple Maps
WFD catchment
River Itchen (GB107042022580)
2024 spills / hours
4 / 17
Long-term average
0.9 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Itchen 0 0.0 down 100% 76%
Constitution Hill Chatham CSO
Overflow on sewer network
Company site name
CONSTITUTION HILL CHATHAM CSO - 108616
EA ID / permit
SWS00197 · A01023
Outlet location
TQ7562068140 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
32 / 77
Long-term average
9.1 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Scheduled
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Tidal Estuary of River Medway 0 0.0 down 100% 8%
Coopers Place Wormley Ceo
Storm discharge at pumping station
Company site name
COOPERS PLACE WORMLEY CEO - 116014
EA ID / permit
SWS00202 · A01128
Outlet location
SU9494037540 (OS grid reference) · View on Apple Maps
WFD catchment
Loxwood Stm-Hambledon Trb (GB107041017980)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2019)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Unnamed Tributary River Arun 0 0.0 no change 100%
Corporation Street Rochester Ceo
Storm discharge at pumping station
Company site name
CORPORATION STREET ROCHESTER NO 1 CSO - 108619
EA ID / permit
SWS00204 · A00243
Outlet location
TQ7479068490 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
5 / 27
Long-term average
3.9 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Nov
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Medway Estuary 0 0.0 down 100% 89%
Cortis Avenue Worthing CSO
Overflow on sewer network
Company site name
CORTIS AVENUE WORTHING CSO - 108212
EA ID / permit
SWS00205 · A00959
Outlet location
TQ1661003670 (OS grid reference) · View on Apple Maps
WFD catchment
Teville Stream (GB107041011940)
Bathing water
Lancing, Beach Green; Worthing; Worthing Beach House
2024 spills / hours
1 / 0.7
Long-term average
0.9 spills a year (monitored since 2017)
Investigation
Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
A Trib. of the Teville Stream 0 0.0 down 100% 100%
Cotswold Walk CSO
Overflow on sewer network
Company site name
COTSWOLD WALK FAREHAM CSO - 108418
EA ID / permit
SWS00207 · A00978
Outlet location
SU5661005180 (OS grid reference) · View on Apple Maps
WFD catchment
River Alver (GB107042011370)
Shellfish water
Portsmouth Harbour
2024 spills / hours
0 / 0.0
Long-term average
0.2 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing
Hoeford Stream 0 0.0 no change 100%
Cowfold WwTW
Inlet overflow at sewage works
Sewage works
Cowfold
Company site name
COWFOLD CEO - 115981
EA ID / permit
SWS00215 · W00356
Outlet location
TQ2153021970 (OS grid reference) · View on Apple Maps
WFD catchment
Cowfold Stream (GB107041012260)
2024 spills / hours
2 / 3.2
Long-term average
3.6 spills a year (monitored since 2018)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Cowfold Stream Trib River Adur 0 0.0 down 100% 100%
CSO Hopwell Drive (Chatham)
Overflow on sewer network
Company site name
HOPEWELL DRIVE CHATHAM CSO - 108657
EA ID / permit
SWS00235 · A00969
Outlet location
TQ7563068140 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
0 / 0.0
Long-term average
0.6 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Medway Estuary 0 0.0 no change 100%
CSO Sompting/Penfold Road Worthing
Overflow on sewer network
Company site name
SOMPTING ROAD PENFOLD ROAD WORTHING CSO - 109116
EA ID / permit
SWS00237 · A00963
Outlet location
TQ1592004040 (OS grid reference) · View on Apple Maps
WFD catchment
Teville Stream (GB107041011940)
Bathing water
Lancing, Beach Green; Worthing; Worthing Beach House
2024 spills / hours
1 / 0.5
Long-term average
0.3 spills a year (monitored since 2018)
Investigation
Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
A Trib. of the Teville Stream 0 0.0 down 100% 100%
CSO, Framfield Road, Uckfield, E/S
Overflow on sewer network
Company site name
FRAMFIELD ROAD UCKFIELD OUTSIDE 29 CSO - 108228
EA ID / permit
SWS00238 · A01249
Outlet location
TQ4747020700 (OS grid reference) · View on Apple Maps
WFD catchment
River Uck at Uckfield (GB107041012660)
2024 spills / hours
0 / 0.0
Long-term average
0.0 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Framfield Stream 0 0.0 no change 100%
Cuxton Combined Emergency Overflow
Storm discharge at pumping station
Company site name
CUXTON CEO - 111607
EA ID / permit
SWS00241 · W00551
Outlet location
TQ7191066980 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
2 / 4.5
Long-term average
13.8 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
The Tidal River Medway 0 0.0 down 100% 100%
Denton Island Newhaven CSO
Storm discharge at pumping station
Company site name
DENTON ISLAND NEWHAVEN CEO - 108060
EA ID / permit
SWS00247 · N01459
Outlet location
TQ4455001540 (OS grid reference) · View on Apple Maps
WFD catchment
OUSE (GB540704104900)
Bathing water
Seaford
2024 spills / hours
15 / 136
Long-term average
2.1 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Tidal River Ouse 0 0.0 down 100% 100%
Dial Road Gillingham CSO
Overflow on sewer network
Company site name
DIAL ROAD GILLINGHAM CSO - 111825
EA ID / permit
SWS00249 · A00407
Outlet location
TQ7898069070 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
0 / 0.0
Long-term average
2.1 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Jul
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
River Medway Estuary 0 0.0 no change 50%
Dibles Road Warsash PS
Storm discharge at pumping station
Company site name
DIBLES ROAD WARSASH CEO - 108421
EA ID / permit
SWS00250 · A00381
Outlet location
SU4999006110 (OS grid reference) · View on Apple Maps
WFD catchment
SOUTHAMPTON WATER (GB520704202800)
Shellfish water
Southampton Water; Central Solent; Stanswood Bay; Approaches to Southampton Water
2024 spills / hours
1 / 8.7
Long-term average
0.9 spills a year (monitored since 2016)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
Hook Lake 0 0.0 down 100% 100%
Ditton WwTW
Storm tank at sewage works
Sewage works
Ditton
Company site name
DITTON SSO - 115933
EA ID / permit
SWS00252 · W00022
Outlet location
TQ7171059080 (OS grid reference) · View on Apple Maps
WFD catchment
MEDWAY (GB530604002300)
2024 spills / hours
0 / 0.0
Long-term average
0.5 spills a year (monitored since 2017)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The River Medway 0 0.0 no change 100%
East Beach Road Selsey Ceo
Overflow on sewer network
Company site name
EAST BEACH ROAD SELSEY CEO - 115110
EA ID / permit
SWS00265 · Permit applied for
Outlet location
SZ8665593439 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
2024 spills / hours
2 / 17
Long-term average
0.7 spills a year (monitored since 2023)
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
The English Channel 0 0.0 down 100% 100%
East Beach Road Selsey CSO
Overflow on sewer network
Company site name
EAST BEACH ROAD SELSEY CSO - 108220
EA ID / permit
SWS00266 · A00510
Outlet location
SZ8677093400 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Selsey
2024 spills / hours
0 / 0.0
Long-term average
0.2 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
No investigation activity in reporting period
Improvement
No improvement action in reporting period
English Channel 0 0.0 no change 68%

Sewage treatment works

Storm tanks and inlet overflows at each Southern 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.