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
Durley Lane Durley Ceo
Storm discharge at pumping station
Company site name
DURLEY LANE DURLEY CEO - 108835
EA ID / permit
SWS00264 · A01358
Outlet location
SU5209017260 (OS grid reference) · View on Apple Maps
WFD catchment
Horton Heath Stream (GB107042016270)
2024 spills / hours
59 / 591
Long-term average
45.3 spills a year (monitored since 2019)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 224 hours spilling →
Unnamed Trib of River Hamble 29 224 down 51% 100%
Rosanna Sailing School Wootton CSO
Overflow on sewer network
Company site name
ROSANNA SAILING SCHOOL WOOTTON CSO - 100599
EA ID / permit
SWS00721 · W00177
Outlet location
SZ5483092200 (OS grid reference) · View on Apple Maps
WFD catchment
WOOTTON CREEK (GB520710101900)
Shellfish water
Cowes and Medina; Ryde
2024 spills / hours
75 / 401
Long-term average
39.2 spills a year (monitored since 2016)
High-spill reason (company)
Performance - GW inundation
Monitor below 90%
Sensor failure / issue · Resolved - Sep
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 223 hours spilling →
The Wootton Creek (Tidal) 41 223 down 45% 88%
Bosham WwTW
Storm tank at sewage works
Sewage works
Bosham
Company site name
BOSHAM SSO - 115735
EA ID / permit
SWS00081 · W00133
Outlet location
SU8088001940 (OS grid reference) · View on Apple Maps
WFD catchment
CHICHESTER HARBOUR (GB580705210000)
Shellfish water
Chichester Harbour (Chichester Channel); Chichester Harbour (Emsworth Channel); Chichester Harbour (Thornham Channel)
2024 spills / hours
65 / 742
Long-term average
41.1 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing, Bathing Water and/or Shellfish Water improvement ongoing
Volume & pollution
Estimate from 221 hours spilling →
Chichester Harbour Channel 22 221 down 66% 100%
Tenterden WwTW
Storm tank at sewage works
Sewage works
Tenterden
Company site name
TENTERDEN SSO - 115773
EA ID / permit
SWS00856 · A00199
Outlet location
TQ8663332642 (OS grid reference) · View on Apple Maps
WFD catchment
Newmill Channel downstream of A28 (GB107040013630)
2024 spills / hours
35 / 413
Long-term average
36.3 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 217 hours spilling →
Trib of Newmill Channel 27 217 down 23% 100%
Hungerford Bottom Bursledon Ceo
Storm discharge at pumping station
Company site name
HUNGERFORD BOTTOM BURSLEDON CEO - 108446
EA ID / permit
SWS00456 · A01280
Outlet location
SU4791009170 (OS grid reference) · View on Apple Maps
WFD catchment
SOUTHAMPTON WATER (GB520704202800)
Shellfish water
Southampton Water; Approaches to Southampton Water
2024 spills / hours
66 / 533
Long-term average
26.2 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 215 hours spilling →
Hungerford Stream 41 215 down 38% 100%
Framfield Ceo
Storm discharge at pumping station
Company site name
FRAMFIELD CEO - 111797
EA ID / permit
SWS00330 · NPSWQD004251
Outlet location
TQ4981020030 (OS grid reference) · View on Apple Maps
WFD catchment
Framfield Stream (GB107041012650)
2024 spills / hours
46 / 257
Long-term average
53.5 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 213 hours spilling →
Tributary of Framfield Stream 33 213 down 28% 100%
Overton Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Overton
Company site name
OVERTON SSO - 115916
EA ID / permit
SWS00633 · NPSWQD010441
Outlet location
SU5046050100 (OS grid reference) · View on Apple Maps
WFD catchment
R. Test (Upper) (GB107042022710)
2024 spills / hours
144 / 2,955
Long-term average
38.0 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 211 hours spilling →
Groundwater 36 211 down 75% 100%
High Halden WwTW
Storm tank at sewage works
Sewage works
High Halden
Company site name
HIGH HALDEN SSO - 115413
EA ID / permit
SWS00423 · W00480
Outlet location
TQ8889037720 (OS grid reference) · View on Apple Maps
WFD catchment
Upper Beult (GB106040018280)
2024 spills / hours
98 / 1,382
Long-term average
69.2 spills a year (monitored since 2016)
Monitor below 90%
Sensor failure / issue · Not Applicable - Ongoing investigation
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 211 hours spilling →
Tributary of River Beult 26 211 down 73% 49%
Stone Hill Road Egerton WwTW
Storm tank at sewage works
Sewage works
Stone Hill Road Egerton
Company site name
STONE HILL ROAD EGERTON SSO - 115858
EA ID / permit
SWS00833 · W00003
Outlet location
TQ9061047090 (OS grid reference) · View on Apple Maps
WFD catchment
Sherway (GB106040018320)
2024 spills / hours
54 / 713
Long-term average
33.7 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 210 hours spilling →
Tributary of River Beult 21 210 down 61% 100%
Hailsham North WwTW
Inlet overflow at sewage works
Sewage works
Hailsham North
Company site name
HAILSHAM NORTH CEO - 115986
EA ID / permit
SWS00382 · A01166
Outlet location
TQ6017010650 (OS grid reference) · View on Apple Maps
WFD catchment
Hurst Haven at Hailsham (GB107041012500)
2024 spills / hours
30 / 189
Long-term average
15.8 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 208 hours spilling →
Tributary of the Hurst Haven 25 208 down 17% 100%
Hollands Road Henfield Ceo
Storm discharge at pumping station
Company site name
HOLLANDS ROAD HENFIELD CEO - 107409
EA ID / permit
SWS00441 · A00287
Outlet location
TQ2053015760 (OS grid reference) · View on Apple Maps
WFD catchment
Woodsmill Stream (GB107041012060)
2024 spills / hours
61 / 302
Long-term average
50.2 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 206 hours spilling →
River Adur 40 206 down 34% 100%
Beaulieu Village WwTW
Storm tank at sewage works
Sewage works
Beaulieu Village
Company site name
BEAULIEU VILLAGE SSO - 115397
EA ID / permit
SWS00051 · A00853
Outlet location
SU3913001900 (OS grid reference) · View on Apple Maps
WFD catchment
BEAULIEU RIVER (GB520704201400)
Shellfish water
Beaulieu River; Lepe Middle Bank; Lymington and Sowley
2024 spills / hours
43 / 574
Long-term average
34.6 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 203 hours spilling →
Beaulieu River 27 203 down 37% 100%
South Terrace Littlehampton CSO
Storm discharge at pumping station
Company site name
SOUTH TERRACE LITTLEHAMPTON CSO - 109390
EA ID / permit
SWS00796 · A00306
Outlet location
TQ0286001170 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Littlehampton
2024 spills / hours
122 / 1,977
Long-term average
65.0 spills a year (monitored since 2018)
High-spill reason (company)
Performance - GW inundation
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 202 hours spilling →
Tidal River Arun 32 202 down 74% 100%
Woodvale Transfer Sst
Storm discharge at pumping station
Company site name
WOODVALE TRANSFER CSO - 115966
EA ID / permit
SWS00967 · A00847
Outlet location
SZ4749096300 (OS grid reference) · View on Apple Maps
WFD catchment
Solent (GB650705150000)
Bathing water
Cowes; Gurnard
Shellfish water
Central Solent; Cowes and Medina; Lepe Middle Bank; Stanswood Bay
2024 spills / hours
86 / 532
Long-term average
90.4 spills a year (monitored since 2016)
High-spill reason (company)
Performance - GW inundation
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 202 hours spilling →
The Solent 70 202 down 19% 100%
Groombridge Wwps
Storm discharge at pumping station
Company site name
FLORENCE FARM GROOMBRIDGE EMO - 108643
EA ID / permit
SWS00370 · A01499
Outlet location
TQ5271037410 (OS grid reference) · View on Apple Maps
WFD catchment
Grom (GB106040018400)
2024 spills / hours
54 / 557
Long-term average
36.6 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 199 hours spilling →
River Grom 21 199 down 61% 100%
Cannon Lane Combined Sewer Overflow
Overflow on sewer network
Company site name
CANNON LANE TONBRIDGE CSO - 108596
EA ID / permit
SWS00137 · K01503
Outlet location
TQ5963046820 (OS grid reference) · View on Apple Maps
WFD catchment
Mid Medway from Eden Confluence to Yalding (GB106040018182)
2024 spills / hours
72 / 552
Long-term average
54.8 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 195 hours spilling →
The River Medway 40 195 down 44% 100%
Rogate WwTW
Storm tank at sewage works
Sewage works
Rogate
Company site name
ROGATE SSO - 115749
EA ID / permit
SWS00716 · W00400
Outlet location
SU8104023160 (OS grid reference) · View on Apple Maps
WFD catchment
Western Rother (GB107041012810)
2024 spills / hours
59 / 627
Long-term average
41.4 spills a year (monitored since 2017)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 194 hours spilling →
River Rother 25 194 down 58% 100%
Dittons Road Polegate CSO
Storm discharge at pumping station
Company site name
DITTONS ROAD POLEGATE CSO - 111654
EA ID / permit
SWS00253 · NPSWQD002642
Outlet location
TQ6029004780 (OS grid reference) · View on Apple Maps
WFD catchment
Pevensey Haven between Rickney and Pevensey (GB107041006670)
2024 spills / hours
59 / 530
Long-term average
45.6 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 191 hours spilling →
Drockmill Hill Gut 32 191 down 46% 100%
Five Oak Green Road Tudeley Ceo
Storm discharge at pumping station
Company site name
TUDELEY CEO - 116069
EA ID / permit
SWS00317 · A01440
Outlet location
TQ6181045590 (OS grid reference) · View on Apple Maps
WFD catchment
Alder Stream & Hammer Dyke (GB106040018110)
2024 spills / hours
40 / 342
Long-term average
35.3 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 191 hours spilling →
A Trib of the River Medway 36 191 down 10% 100%
CSO Breakers Yard Nutbourne
Overflow on sewer network
Company site name
PRIORS LEAZE LANE NUTBOURNE CSO - 111267
EA ID / permit
SWS00233 · A01485
Outlet location
SU7790005610 (OS grid reference) · View on Apple Maps
WFD catchment
CHICHESTER HARBOUR (GB580705210000)
Shellfish water
Chichester Harbour (Chichester Channel); Chichester Harbour (Emsworth Channel); Chichester Harbour (Thornham Channel)
2024 spills / hours
36 / 413
Long-term average
23.1 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 189 hours spilling →
The Ham Brook 19 189 down 47% 99%
Brook Lane PS
Storm discharge at pumping station
Company site name
BROOK LANE BOTLEY CEO - 108841
EA ID / permit
SWS00110 · A00156
Outlet location
SU5152011340 (OS grid reference) · View on Apple Maps
WFD catchment
SOUTHAMPTON WATER (GB520704202800)
2024 spills / hours
47 / 676
Long-term average
14.8 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 189 hours spilling →
River Hamble (Tidal) 17 189 down 64% 100%
Wittersham WwTW
Storm tank at sewage works
Sewage works
Wittersham
Company site name
WITTERSHAM SSO - 115823
EA ID / permit
SWS00961 · W00523
Outlet location
TQ8877026250 (OS grid reference) · View on Apple Maps
WFD catchment
Lower Rother from Robertsbridge to Iden (GB107040013640)
2024 spills / hours
54 / 640
Long-term average
40.0 spills a year (monitored since 2018)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 188 hours spilling →
Tributary of River Rother 34 188 down 37% 100%
Bow Bridge Combined Sewer Overflow
Overflow on sewer network
Company site name
BOW BRIDGE FRESHWATER CEO - 108512
EA ID / permit
SWS00086 · W00153
Outlet location
SZ3429087160 (OS grid reference) · View on Apple Maps
WFD catchment
WESTERN YAR (GB520710101800)
Shellfish water
Pennington; Yarmouth
2024 spills / hours
63 / 287
Long-term average
33.9 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 185 hours spilling →
Western Yar 34 185 down 46% 100%
Bury WwTW
Storm tank at sewage works
Sewage works
Bury
Company site name
BURY SSO - 115801
EA ID / permit
SWS00130 · W00367
Outlet location
TQ0162012660 (OS grid reference) · View on Apple Maps
WFD catchment
ARUN (GB540704105000)
2024 spills / hours
49 / 921
Long-term average
58.9 spills a year (monitored since 2018)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 184 hours spilling →
River Arun 17 184 down 65% 100%
Hailsham South WwTW
Inlet overflow at sewage works
Sewage works
Hailsham South
Company site name
HAILSHAM SOUTH STORM CSO - 102803
EA ID / permit
SWS00384 · A01164
Outlet location
TQ5965008730 (OS grid reference) · View on Apple Maps
WFD catchment
Horse Eye Sewer (GB107041012420)
2024 spills / hours
75 / 491
Long-term average
58.6 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 184 hours spilling →
The Horse Eye Sewer 52 184 down 31% 100%
Appledore Road Woodchurch Wps
Storm discharge at pumping station
Company site name
APPLEDORE ROAD WOODCHURCH CEO - 108760
EA ID / permit
SWS00019 · A00266
Outlet location
TQ9484033900 (OS grid reference) · View on Apple Maps
WFD catchment
Cradlebridge Petty Sewer (GB107040019530)
2024 spills / hours
34 / 282
Long-term average
32.5 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 182 hours spilling →
The Cradlebridge Sewer 27 182 down 21% 100%
Tonbridge WwTW
Storm tank at sewage works
Sewage works
Tonbridge
Company site name
TONBRIDGE SSO - 115731
EA ID / permit
SWS00877 · A00036
Outlet location
TQ5996046320 (OS grid reference) · View on Apple Maps
WFD catchment
Mid Medway from Eden Confluence to Yalding (GB106040018182)
2024 spills / hours
32 / 453
Long-term average
24.7 spills a year (monitored since 2019)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 180 hours spilling →
The Botany Stream 16 180 down 50% 100%
Rye WwTW, Harbour Road, Rye
Storm tank at sewage works
Sewage works
Rye Harbour Road Rye
Company site name
RYE SSO - 115433
EA ID / permit
SWS00729 · W00546
Outlet location
TQ9285019850 (OS grid reference) · View on Apple Maps
WFD catchment
ROTHER (GB540704016100)
Bathing water
Camber
2024 spills / hours
70 / 866
Long-term average
30.3 spills a year (monitored since 2016)
High-spill reason (company)
Performance - GW inundation
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 178 hours spilling →
The River Rother 33 178 down 53% 100%
Town Row Rotherfield No 1 CSO
Overflow on sewer network
Company site name
TOWN ROW ROTHERFIELD NO 1 CSO - 103296
EA ID / permit
SWS00882 · K02112
Outlet location
TQ5657030210 (OS grid reference) · View on Apple Maps
WFD catchment
Upper Eridge Stream (GB106040013370)
2024 spills / hours
52 / 290
Long-term average
48.7 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 177 hours spilling →
Trib of the Eridge Stream 32 177 down 38% 100%
Withypitts Turners Hill Ceo
Storm discharge at pumping station
Company site name
WITHYPITTS TURNERS HILL CEO - 108386
EA ID / permit
SWS00960 · A00314
Outlet location
TQ3425035290 (OS grid reference) · View on Apple Maps
WFD catchment
Medway at Weir Wood (GB106040018070)
2024 spills / hours
51 / 318
Long-term average
27.1 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 176 hours spilling →
Trib of the River Medway 29 176 down 43% 99%
Bethersden WwTW
Storm tank at sewage works
Sewage works
Bethersden
Company site name
BETHERSDEN SSO - 115856
EA ID / permit
SWS00060 · W00489
Outlet location
TQ9224040370 (OS grid reference) · View on Apple Maps
WFD catchment
Upper Beult (GB106040018280)
2024 spills / hours
47 / 564
Long-term average
36.3 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 175 hours spilling →
Tributary of River Beult 21 175 down 55% 100%
Beckley WwTW
Storm tank at sewage works
Sewage works
Beckley
Company site name
BECKLEY SSO - 115849
EA ID / permit
SWS00052 · W00537
Outlet location
TQ8530024530 (OS grid reference) · View on Apple Maps
WFD catchment
Lower Rother from Robertsbridge to Iden (GB107040013640)
2024 spills / hours
30 / 292
Long-term average
24.7 spills a year (monitored since 2018)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 175 hours spilling →
The Knelle Petty Sewer 22 175 down 27% 99%
Brown Mill Little Chart Forstal Ceo
Storm discharge at pumping station
Company site name
BROWN MILL LITTLE CHART FORSTAL CEO - 108807
EA ID / permit
SWS00115 · A01329
Outlet location
TQ9579045160 (OS grid reference) · View on Apple Maps
WFD catchment
Upper Great Stour (GB107040019660)
2024 spills / hours
49 / 486
Long-term average
17.4 spills a year (monitored since 2017)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 173 hours spilling →
The Great Stour 21 173 down 57% 100%
Dover and Folkestone Waste Water
Storm discharge at pumping station
Company site name
THE STADE FOLKESTONE CEO - 108909
EA ID / permit
SWS00261 · A00661
Outlet location
TR2422035940 (OS grid reference) · View on Apple Maps
WFD catchment
Kent South (GB640704540001)
Bathing water
Folkestone
2024 spills / hours
48 / 329
Long-term average
23.1 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing, Bathing Water and/or Shellfish Water investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 172 hours spilling →
The English Channel 37 172 down 23% 100%
Buxted WwTW
Storm tank at sewage works
Sewage works
Buxted
Company site name
BUXTED SSO - 115400
EA ID / permit
SWS00131 · W00607
Outlet location
TQ4947023690 (OS grid reference) · View on Apple Maps
WFD catchment
Uck Updtream of Buxted (GB107041012990)
2024 spills / hours
97 / 1,457
Long-term average
66.6 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 171 hours spilling →
River Uck 19 171 down 80% 100%
Norton Wps CSO
Storm discharge at pumping station
Company site name
NORTON TRANSFER IOW SSSI CEO - 108174
EA ID / permit
SWS00623 · A00723
Outlet location
SZ3477089620 (OS grid reference) · View on Apple Maps
WFD catchment
WESTERN YAR (GB520710101800)
Shellfish water
Lymington and Sowley; Pennington; Newtown; Yarmouth
2024 spills / hours
7 / 29
Long-term average
55.0 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 170 hours spilling →
The Solent 14 170 up 100% 100%
Norton Headworks Wps
Storm discharge at pumping station
Company site name
NORTON TRANSFER IOW PUMPED CEO - 109524
EA ID / permit
SWS00622 · A00846
Outlet location
SZ3425089990 (OS grid reference) · View on Apple Maps
WFD catchment
Solent (GB650705150000)
Bathing water
Colwell Bay; Totland Bay
Shellfish water
Lymington and Sowley; Pennington; Newtown; Yarmouth
2024 spills / hours
91 / 470
Long-term average
54.0 spills a year (monitored since 2016)
High-spill reason (company)
Performance - GW inundation
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 170 hours spilling →
The Solent 50 170 down 45% 100%
Benenden WwTW
Storm tank at sewage works
Sewage works
Benenden
Company site name
BENENDEN SSO - 115910
EA ID / permit
SWS00056 · A00667
Outlet location
TQ8186033470 (OS grid reference) · View on Apple Maps
WFD catchment
Tributary of Newmill Channel upstream of Rolvenden (GB107040019680)
2024 spills / hours
34 / 413
Long-term average
20.0 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 167 hours spilling →
Tributary of Newmill Channel 21 167 down 38% 100%
Tunbridge Wells South WwTW
Inlet overflow at sewage works
Sewage works
Tunbridge Wells South
Company site name
TUNBRIDGE WELLS SOUTH CSO - 115448
EA ID / permit
SWS00887 · A00200
Outlet location
TQ5269037420 (OS grid reference) · View on Apple Maps
WFD catchment
Grom (GB106040018400)
2024 spills / hours
69 / 300
Long-term average
60.9 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 167 hours spilling →
The River Grom 50 167 down 28% 100%
Worthing WwTW
Inlet overflow at sewage works
Sewage works
Worthing
Company site name
EAST WORTHING CSO - 115407
EA ID / permit
SWS00971 · A01107
Outlet location
TQ1716002080 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
2024 spills / hours
110 / 1,607
Long-term average
39.2 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 166 hours spilling →
English Channel 39 166 down 65% 99%
Ripe WwTW
Inlet overflow at sewage works
Sewage works
Ripe
Company site name
RIPE CEO - 116043
EA ID / permit
SWS00710 · A01230
Outlet location
TQ5094009730 (OS grid reference) · View on Apple Maps
WFD catchment
Glynde Reach (GB107041012510)
2024 spills / hours
63 / 818
Long-term average
33.2 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 165 hours spilling →
Unnamed Trib.Glynde Reach/Ouse 26 165 down 59% 100%
Godstone WwTW
Storm tank at sewage works
Sewage works
Godstone
Company site name
GODSTONE SSO - 115799
EA ID / permit
SWS00357 · W00004
Outlet location
TQ3651050540 (OS grid reference) · View on Apple Maps
WFD catchment
Gibbs Brook (GB106040018640)
2024 spills / hours
47 / 412
Long-term average
28.7 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 163 hours spilling →
Gibbs Brook 21 163 down 55% 100%
Lane End Transfer PS
Storm discharge at pumping station
Company site name
LANE END STORAGE TANKS BEMBRIDGE CEO - 108533
EA ID / permit
SWS00491 · A00698
Outlet location
SZ6584088220 (OS grid reference) · View on Apple Maps
WFD catchment
Isle of Wight East (GB650705530000)
Bathing water
Bembridge; St Helens
Shellfish water
Ryde
2024 spills / hours
57 / 710
Long-term average
41.9 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 163 hours spilling →
The Solent 27 163 down 53% 100%
Sewer Maynards Gate Pumping Stn
Overflow on sewer network
Company site name
MAYNARDS GATE CROWBOROUGH CSO - 103294
EA ID / permit
SWS00766 · K02128
Outlet location
TQ5410029750 (OS grid reference) · View on Apple Maps
WFD catchment
Tributary of upper Medway at Crowborough (GB106040013360)
2024 spills / hours
77 / 393
Long-term average
44.7 spills a year (monitored since 2023)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Monitor below 90%
Sensor failure / issue · Resolved - Jun
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 162 hours spilling →
Freshwater River 32 162 down 58% 56%
Bognor Regis Wastewater PS
Storm discharge at pumping station
Company site name
WEST PARK BOGNOR REGIS CEO - 108160
EA ID / permit
SWS00077 · A00790
Outlet location
SZ9217095940 (OS grid reference) · View on Apple Maps
WFD catchment
Sussex (GB640704540003)
Bathing water
Bognor Regis (Aldwick); Bognor Regis East; Felpham; Pagham
2024 spills / hours
136 / 1,271
Long-term average
68.7 spills a year (monitored since 2016)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 159 hours spilling →
Controlled Sea 62 159 down 54% 100%
East Meon WwTW
Storm tank at sewage works
Sewage works
East Meon
Company site name
EAST MEON SSO - 115784
EA ID / permit
SWS00271 · W00247
Outlet location
SU6730022370 (OS grid reference) · View on Apple Maps
WFD catchment
R. Meon (GB107042016640)
2024 spills / hours
32 / 406
Long-term average
18.0 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 159 hours spilling →
River Meon 14 159 down 56% 100%
Huggetts Farm Pumping Station
Storm discharge at pumping station
Company site name
HUGGETTS FARM HORAM CEO - 108258
EA ID / permit
SWS00455 · A00288
Outlet location
TQ5676018590 (OS grid reference) · View on Apple Maps
WFD catchment
Bull River from Foxhunt Green to Lower Horsebridge (GB107041012380)
2024 spills / hours
40 / 323
Long-term average
44.0 spills a year (monitored since 2019)
High-spill reason (company)
Not asset maintenance - Hydraulic capacity
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 157 hours spilling →
Freshwater River 31 157 down 23% 99%
Fairplace Hill Wps
Storm discharge at pumping station
Company site name
FAIRPLACE HILL BURGESS HILL CEO - 108196
EA ID / permit
SWS00297 · A00577
Outlet location
TQ3110920444 (OS grid reference) · View on Apple Maps
WFD catchment
R. Adur East (GB107041012220)
2024 spills / hours
43 / 210
Long-term average
33.1 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
Env Act (SODRP) improvement ongoing
Volume & pollution
Estimate from 156 hours spilling →
Unnamed Trib of River Adur 30 156 down 30% 100%
Paddock Wood WwTW
Storm tank at sewage works
Sewage works
Paddock Wood
Company site name
PADDOCK WOOD SSO - 115424
EA ID / permit
SWS00638 · W00587
Outlet location
TQ6784045840 (OS grid reference) · View on Apple Maps
WFD catchment
Lower Teise (GB106040018130)
2024 spills / hours
39 / 313
Long-term average
24.2 spills a year (monitored since 2016)
Investigation
Env Act (SODRP) investigation ongoing, UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 156 hours spilling →
The Rhoden Stream 22 156 down 44% 100%
Ashford Wastewater Treatment Works
Storm tank at sewage works
Sewage works
Ashford
Company site name
ASHFORD SSO - 115790
EA ID / permit
SWS00026 · A00805
Outlet location
TR0229043660 (OS grid reference) · View on Apple Maps
WFD catchment
Great Stour between Ashford and Wye (GB107040019741)
2024 spills / hours
45 / 638
Long-term average
33.8 spills a year (monitored since 2016)
Investigation
UWWTR investigation ongoing
Improvement
No improvement action in reporting period
Volume & pollution
Estimate from 156 hours spilling →
Great Stour 17 156 down 62% 100%

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.