Storm overflow register · 2025 annual return
South West Water storm overflows, 2025
South West Water reported 1,365 storm overflows in England for 2025. Together they recorded 46,164 spills over 407,006 hours, an average of 33.8 spills per overflow against 20.4 across England. That ranks 10 of 10 companies, where 1 is the fewest spills per overflow. Counting the same overflows in both years, spills were down 18% on 2024.
178 overflows did not spill · 275 spilled more than 60 times · 1,313 had monitors working for 90% of the year or more · 334 sewage treatment works with overflows
Hours spilling by month, 2025
All South West Water storm overflows
Sorted by hours spilling. Open an overflow for its permit, location, reasons for high spills and improvement status.
| Overflow | Discharges to | Spills 2025 | Hours 2025 | Spills vs 2024 | Monitor uptime |
|---|---|---|---|---|---|
Whiddon Down STW
|
Fingle Brook(S) | 0 | 0.0 | down 100% | 100% |
Uffculme WwTW
|
River Culm | 0 | 0.0 | down 100% | 100% |
Upton Cross Combined Sewer Overflow
|
Trib of River Lyner | 0 | 0.0 | no change | 95% |
West Alvington CSO
|
Kingsbridge Estuary(S) | 0 | 0.0 | down 100% | 100% |
11 High Street CSO
|
River Lew | 0 | 0.0 | down 100% | 100% |
Ashprington WwTW
|
River Harbourne (Estuarine) | 0 | 0.0 | down 100% | 97% |
Spreyton STW
|
Coombe Stream(S) | 0 | 0.0 | no change | 93% |
Tolskithey Lane CSO
|
Trib of Portreath Stream | – | – | 0% | |
Beals Mill No 2 CSO
|
River Inny | – | – | – | |
Beals Mill No 1 CSO
|
River Inny | – | – | – | |
O/S 8 Callenick Street CSO
|
Kenwyn River (E) | – | – | – | |
Playing Fields CSO
|
River Lyd (S) | – | – | – | |
Topsham Road Jct Robers Road CSO
|
River Exe via SWS | – | – | – | |
Jubilee Buildings
|
Stonehouse Creek | – | – | – | |
Industrial Estate CSO
|
Trib of River Deer | – | – | – |
Sewage treatment works
Storm tanks and inlet overflows at each South West Water sewage works. The figures are 2025 spills.
- Abbotsham 196
- Altarnun 165
- Antony 64
- Ashill Ashill 34
- Ashprington 19
- Ashreigny 167
- Ashwater 104
- At Alswear 42
- At Bradninch 98
- At Lapford 92
- At Morchard Bishop 124
- Atherington 60
- Aveton Gifford 4
- Aylesbeare 55
- Bampton 0
- Barnstaple 76
- Bathpool 26
- Beals Mill 125
- Belstone And South Tawton 69
- Bere Alston 173
- Bickleigh 79
- Bigbury And Challaborough 0
- Bishops Nympton 53
- Bittaford 5
- Black Torrington 102
- Blackawton 56
- Blackwater 41
- Blunts 11
- Bodmin Nanstallon 47
- Bow 8
- Bradworthy 109
- Branscombe 29
- Bratton Clovelly 104
- Bratton Fleming 61
- Brayford 172
- Bridestowe 74
- Bridford 31
- Bridgerule 34
- Bridgetown Ps 4
- Brixton 22
- Broadhempston 57
- Broadwindsor 95
- Broadwoodkelly 14
- Brompton Regis 97
- Brownston 59
- Brushford 23
- Buckfastleigh 183
- Buckland 75
- Buckland Brewer 63
- Buckland Monachorum 52
- Buckland St Mary 1
- Burlescombe 20
- Burrington 127
- Cadeleigh 1
- Callington 62
- Camelford 45
- Camels Head 126
- Carnon Downs 21
- Chacewater 170
- Chagford 40
- Chapel Amble 20
- Chawleigh 56
- Cheriton Bishop 41
- Cheriton Fitzpaine 140
- Chillaton 0
- Chillington And Frogmore 28
- Chilsworthy 41
- Chittlehamholt 72
- Chittlehampton 60
- Christow 61
- Chudleigh 180
- Chudleigh Knighton 89
- Chulmleigh 121
- Churchinford 6
- Clawton 12
- Clearbrook 26
- Cobbaton 84
- Colyton And Colyford 75
- Commonmoor 127
- Compton And Marldon 1
- Constantine 41
- Cornworthy 74
- Crockernwell 104
- Crowndale 9
- Crowsnest 40
- Croyde 253
- Culmstock 68
- Delabole 159
- Denbury 59
- Diptford 111
- Dittisham 46
- Doddiscombsleigh 49
- Dolton 118
- Drewsteignton 26
- Duloe 41
- Dulverton 116
- Dunkeswell 26
- Dunsford 110
- East Allington 40
- East Knowstone 102
- East Ogwell 68
- East Prawle 60
- East Taphouse 18
- East Yarde 0
- Egloskerry 116
- Ermington 9
- Ernesettle 161
- Exbourne 84
- Exeter 67
- Exford 39
- Exmouth 55
- Falmouth And Ps 38
- Feniton 33
- Fluxton 107
- Folly Gate 126
- Ford And Fairy Cross 81
- Fowey 72
- Fraddon Wastewater Treatement Works 67
- Frithelstock 24
- Galmpton 16
- George Nympton 49
- Golberdon 126
- Goodleigh 8
- Goonhavern 199
- Gratton 143
- Gratton Yelverton 15
- Gunnislake 166
- Gwennap 154
- Halberton Halberton 64
- Halwill 85
- Harberton 168
- Harbertonford 120
- Harrowbarrow 68
- Hartland 93
- Hatherleigh 58
- Hatt 24
- Hawkchurch 37
- Hayle 49
- Heathfield 106
- Helebridge 119
- Helston 32
- Hemyock 36
- High Bickington 173
- Highampton Wastewater Trtment Works 95
- Higher Clovelly 59
- Holbeton 101
- Holcombe Rogus 142
- Holne 117
- Holsworthy 188
- Honiton 223
- Horns Cross 230
- Horrabridge 53
- Ipplepen 96
- Ivybridge 121
- Jacobstow 13
- Kilkhampton 100
- Kilmington 110
- Kings Nympton 21
- Kings Nympton North 11
- Kingscott 84
- Kingston 103
- Knowle 82
- Ladock Valley 55
- Lamerton 109
- Landrake 91
- Langtree Septic 65
- Latchley 42
- Lawhitton 12
- Lee Mill 116
- Lewannick 2
- Lewdown 127
- Lifton 0
- Liskeard 73
- Little Petherick 112
- Littleham 80
- Loddiswell 15
- Lords Meadow 18
- Luckett 0
- Lustleigh Wastewater Treatment Work 72
- Lutton 224
- Lydford Wastewater Trtment Works 133
- Lyme Regis 54
- Lynmouth 31
- Malborough Village Pumping Station 6
- Marsh Mills 84
- Mary Tavy 126
- Meavy 34
- Meeth 70
- Menheniot 131
- Merton 144
- Metherell 137
- Middle Marwood 38
- Millbrook 66
- Milton Abbot 83
- Minions 105
- Modbury 54
- Molland 38
- Monkleigh 62
- Morebath 91
- Moreleigh 92
- Moretonhampstead 144
- Musbury And Whitford 61
- Mylor Bridge 87
- Newham 51
- Newton St Cyres 0
- North Fal 131
- North Hill 19
- North Molton 85
- North Petherwin 74
- North Tawton 139
- Northlew 76
- Oakford 11
- Offwell 71
- Okehampton 145
- Par 11
- Parkham 43
- Parracombe 5
- Payhembury 119
- Pelynt 84
- Pennymoor 44
- Petrockstowe 76
- Pillaton Wastewater Treatmemt Works 33
- Plymtree 38
- Polperro 12
- Ponsanooth 126
- Port Isaac 3
- Portloe 0
- Praze An Beeble 147
- Princetown 176
- Puddington 70
- Pyworthy 146
- Quethiock 34
- Rackenford 37
- Radford 54
- Rattery 107
- Rewe 175
- Riddlecombe Waste Water Treatment 11
- Rilla Mill 38
- Ringmore 26
- Roborough 143
- Salcombe Regis 235
- Sampford Courtney 15
- Sampford Peverell 45
- Sandford 56
- Scorriton 141
- Seaton 60
- Shebbear 91
- Sheepwash 139
- Sherford 50
- Sheviock 1
- Shillingford St George 13
- Shop Shop 243
- Shute 43
- Silverton 17
- Slapton 72
- South Brent 66
- South Milton 37
- South Molton 261
- Sparkwell Wastewater Treatment Work 79
- Spreyton 113
- St Agnes 0
- St Austell 106
- St Austell North 86
- St Breward 41
- St Buryan 36
- St Cleer 67
- St Columb 16
- St Dennis Wastewater Treatment Work 162
- St Dominick 93
- St Gennys 19
- St Germans 27
- St Giles In The Wood 21
- St John 42
- St Just 18
- St Keverne 22
- St Leonards 113
- St Mabyn 7
- St Neot 167
- St Newlyn East 74
- St Teath 101
- Staverton 24
- Stibb 14
- Stibb Cross 58
- Stockland 41
- Stoke Climsland 105
- Stoke Hill 227
- Stoke Rivers 0
- Stoodleigh 21
- Strete 49
- Talaton 29
- Tatworth 243
- Tedburn St Mary 71
- Teign Village 32
- Thorncombe 8
- Thorverton 14
- Throwleigh 19
- Tiverton 160
- Torpoint 57
- Torrington 42
- Totnes 123
- Trebullett 95
- Tredinnick 23
- Treknow 17
- Trewidland 32
- Trusham 59
- Uffculme 0
- Ugborough 92
- Uplowman 11
- Veryan 21
- Walkhampton 104
- Warbstow Warbstow 66
- Weare Giffard 115
- Week St Mary 40
- Wembury 74
- Wembworthy 93
- West Anstey 12
- West Buckland 94
- West Charleton 46
- West Down 135
- Whiddon Down 0
- Widecombe 14
- Widegates 39
- Willand 106
- Wilmington 34
- Winkleigh Wastewater Treatment Wrks 33
- Winsham 94
- Witheridge Witheridge 142
- Woodbury 81
- Woolfardisworthy 23
- Yarcombe 87
- Yarnscombe 29
- Yealmpton 18
- Yeoford 31
- Zeal Monachorum 97
← All water companies · Contains Environment Agency data licensed under the Open Government Licence v3.0. How to read the data.