Area of Outstanding Natural Beauty

Dorset - Live Sewage

Polluted by sewage 24,789 hours in 2026 - That's 2.87 years , monitoring offline 2,074 hours , potential overflows 560 hours so far..

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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Totals for Dorset in 2026

Sewage24,789 hours
Monitoring offline2,074 hours
Potential pollution560 hours
Storm overflows185

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy
Drop = sewage minutes → all day
Potential pollution Monitoring offline
Jan - 10,099 hours , 558 potential
Feb - 11,059 hours , 2 offline
Mar - 3,166 hours
Apr - 47 hours , 13 offline
May - 2 hours
Jun - 0 hours
Jul - 0 hours
Aug - 11 hours , 2 potential
Sept - 26 hours , 527 offline
Oct - 369 hours , 883 offline
Nov - 6 hours , 647 offline
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Storm overflows in and around Dorset

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Wessex Water MARTINSTOWN B3159 South Winterbourne 103 2,127h 18m -
Wessex Water PIDDLETRENTHIDE R/O TRENT HOUSE (CSO6) River Piddle 71 1,484h 48m 1,341 h
Wessex Water ABBOTSBURY B3157 PORTESHAM ROAD STORM TANK Abbotsbury Brook 68 1,475h 51m -
Wessex Water SYDLING ST NICHOLAS NEAR HUISH FARM STORM TANK Sydling Water 65 1,461h 43m -
Wessex Water BUCKLAND NEWTON DUNTISH INLET River Lydden 77 1,436h 51m -
Wessex Water MAIDEN NEWTON DORCHESTER ROAD STORM TANK River Frome 52 1,058h 19m -
Wessex Water LITTON CHENEY CHICKSBRIDGE River Bride 50 1,013h 18m -
Wessex Water GODMANSTONE River Cerne 44 1,001h 54m -
Wessex Water CHARMINSTER NORTH STREET River Frome 41 890h 46m -
Wessex Water PUNCKNOWLE NEXT TO GULLY KNAP FARM STORM TANK River Bride 49 882h 30m -
Wessex Water TOLLER PORCORUM TOLLER LANE INLET River Hooke 43 856h 8m -
Wessex Water EVERSHOT OFF EAST HILL STORM TANK River Frome 48 837h 17m -
Wessex Water WEST LULWORTH HAMBURY FARM English Channel 39 769h 13m -
South West Water UPLYME STW_SSO_UPLYME River Lim 50 729h 31m -
Wessex Water SHILLINGSTONE STORM TANK Stour 46 703h 13m -
Wessex Water SHROTON River Iwerne 33 696h 4m -
Wessex Water DURWESTON WATER LANE River Stour 31 642h 21m -
Wessex Water CHIDEOCK MILL LANE STORM TANK River Winniford 38 585h 54m -
Wessex Water NETHERBURY BEAMINSTER River Brit 39 528h 30m -
South West Water HAWKCHURCH STW_SO_HAWKCHURCH Blackwater River/Stream 30 499h 45m -
Wessex Water PIDDLETRENTHIDE ACROSS RIVER FROM RIVENDELL (CSO4) River Piddle 27 496h 24m -
Wessex Water BEAMINSTER SOUTHGATE River Brit 46 461h 40m -
Wessex Water SOUTH PERROTT NEAR PIPPLEPEN FARM STORM TANK River Parrett 33 396h 44m -
Wessex Water CORFE CASTLE XXXXX FARM ROAD STORM TANK Corfe River 30 369h 23m 558 h
Wessex Water HALSTOCK WATERY LANE STORM TANK River Yeo 25 368h -
Wessex Water WEST BEXINGTON Chesil Beach 29 262h 39m -
South West Water HORN BRIDGE SPST_PSCSOEO_LYME REGIS River Lim 23 208h 43m -
Wessex Water BRADPOLE LEE LANE River Asker 26 208h 42m -
South West Water BROADWINDSOR STW_SSO_BROADWINDSOR Drimpton Stream 21 147h 34m -
Wessex Water EAST CHALDON River Win 14 145h -
South West Water DRIMPTON SPST_PSCSOEO_DRIMPTON Temple Brook 14 137h 15m -
Wessex Water BRIDPORT SOUTH BRIDGE TANK River Asker 24 121h 21m -
South West Water MOSTERTON SPS_PSCSOEO_MOSTERTON River Axe 44 119h 20m -
Wessex Water XXXXX XXXXXX GLEBE FARM Corfe River 15 106h 15m 3 h
Wessex Water Unknown Unknown 15 99h 22m -
Wessex Water BRIDPORT WEST BAY SLUICES Bridport Harbour 21 75h 6m -
Wessex Water HARMANS CROSS TRANSFER STATION Unnamed Stream 17 73h 44m -
Wessex Water Unknown Unknown 16 71h 38m -
Wessex Water SHIPTON GORGE OFF MARKETS LANE River Bride 14 71h 25m -
Wessex Water SWANAGE MARINE PARADE TUNNEL Swanage Bay 15 70h 21m -
Wessex Water BRIDPORT WEST STREET River Brit 33 67h 56m -
Wessex Water SYDLING ST NICHOLAS Sydling Water 8 67h 43m -
Wessex Water EVERSHOT COMMON River Frome 41 59h 34m -
Wessex Water WAREHAM KEYSWORTH DRIVE STORM TANK Tidal River Piddle 20 58h 54m -
Wessex Water BRIDPORT SOUTH STREET DEPOT River Brit 29 58h 45m 22 h
Wessex Water CHURCH KNOWLE ANIMAL SANCTUARY Corfe River 15 58h 16m -
Wessex Water WEST MILTON INLET Mangerton River 9 53h 14m -
Wessex Water STOBOROUGH KINGS ARMS River Frome 18 52h 47m -
Wessex Water CHIDEOCK SEATOWN Winniford 8 41h -
South West Water MILL LN_CSO_UPLYME River Lim 16 40h 5m 2 h
Wessex Water HOLTON HEATH HOLTON HEATH SEWAGE PUMPING STATION Poole Harbour 8 36h 47m -
Wessex Water CORSCOMBE OFF FUDGE HILL STORM TANK Halstock Stream 11 34h 39m -
Wessex Water Unknown Unknown 10 33h 32m -
South West Water BROADWINDSOR STW_SO_BROADWINDSOR Drimpton Stream 17 31h 33m -
Wessex Water OSMINGTON PONTINS English Channel 11 29h 39m -
South West Water WINSHAM STW_PSCSOEO_WINSHAM River Axe 33 28h 49m -
Wessex Water WAREHAM SOUTH EAST River Frome 10 25h 22m -
Wessex Water Unknown Unknown 11 22h 30m -
Wessex Water WORTH MATRAVERS STORM TANK Stream At Winspit Botttom 12 21h -
Wessex Water LANGTON HERRING OFF LOWER FARM INLET West Fleet 11 20h 32m -
Wessex Water Unknown Unknown 4 17h 14m -
South West Water THE COBB SPS_PSCSOEO_LYME REGIS Lyme Bay 5 17h 6m 15 h
Wessex Water CORFE CASTLE RED LANE Corfe River 6 16h 38m -
Wessex Water SWANAGE SHORE ROAD O/S NURSING HOME Ulwell Stream 5 16h 36m -
Wessex Water SWANAGE DURLSTON ROAD Unnamed Stream To Durlston Bay 14 15h 22m -
Wessex Water BURTON BRADSTOCK GROVE ROAD River Bride 3 13h 58m -
Wessex Water STOBOROUGH RIDGE River Frome 4 12h 53m -
Wessex Water WEST LULWORTH OUTFALL PS English Channel 3 12h 27m -
Wessex Water CORFE CASTLE STUDLAND ROAD Corfe River 8 11h 56m -
Wessex Water STUDLAND WADMORE LANE Little Sea 5 11h 25m -
Wessex Water SWANAGE HERSTON CROSS ATTENUATION TANK River Swan 2 11h 18m -
Wessex Water WAREHAM ABBOTTS QUAY River Frome 8 10h 50m -
Wessex Water Unknown Unknown 2 10h 37m -
Wessex Water BURTON BRADSTOCK BURTON SOUTHOVER River Bride 1 9h 10m -
South West Water JERICHO_CSO_LYME REGIS River Lim 5 8h 51m -
Wessex Water ABBOTSBURY CHURCH STREET Mill Stream 5 8h 30m -
South West Water THORNCOMBE STW_SO_THORNCOMBE River Synderford 4 8h 17m -
Wessex Water Unknown Unknown 3 7h 47m -
Wessex Water EAST KNIGHTON River Win 1 7h 2m -
South West Water CLAPTON SPS_PSCSOEO_CREWKERNE Clapton Stream 2 6h 33m -
Wessex Water BEAMINSTER HAMS PLOT SOUTH GATE River Brit 2 5h 52m -
Wessex Water BRADPOLE FISHWEIR FOUL River Asker Via Sws 1 4h 58m -
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 2 2h 56m -
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 2 2h 56m -
Wessex Water STUDLAND COOMBE Studland Bay 2 1h 9m -
Wessex Water BRIDPORT WEST BRIDGE River Brit 3 0h 56m -
South West Water GUN CLIFF SPST_PSCSOEO_LYME REGIS River Lim 1 0h 54m 407 h
South West Water GOSLINGS BRIDGE_CSO_LYME REGIS River Lim 1 0h 29m 3 h
Wessex Water RINGSTEAD BAY STORM TANK Unnamed Stream 1 0h 24m -
Wessex Water CORFE CASTLE STUDLAND ROAD Corfe River 0 0h -
South West Water JERICHO_CSO_LYME REGIS River Lim 0 0h -
South West Water WINSHAM STW_SO_WINSHAM River Axe 0 0h -
Wessex Water SYDLING ST NICHOLAS Sydling Water 0 0h -
Wessex Water BUCKLAND NEWTON DUNTISH INLET River Lydden 0 0h -
South West Water HORN BRIDGE SPST_PSCSOEO_LYME REGIS River Lim 0 0h -
South West Water UPLYME STW_SSO_UPLYME River Lim 0 0h -
Wessex Water HALSTOCK WATERY LANE STORM TANK River Yeo 0 0h -
Wessex Water PUNCKNOWLE NEXT TO GULLY KNAP FARM STORM TANK River Bride 0 0h -
Wessex Water PIDDLETRENTHIDE R/O TRENT HOUSE (CSO6) River Piddle 0 0h -
Wessex Water BRIDPORT WEST BAY SLUICES Bridport Harbour 0 0h -
Wessex Water CHURCH KNOWLE ANIMAL SANCTUARY Corfe River 0 0h -
Wessex Water WEST BEXINGTON Chesil Beach 0 0h -
Wessex Water BLANDFORD ST MARY BOURNEMOUTH ROAD River Stour 0 0h 13 h
Wessex Water SWANAGE SHORE ROAD O/S NURSING HOME Ulwell Stream 0 0h -
Wessex Water EVERSHOT COMMON River Frome 0 0h -
Wessex Water BEAMINSTER HAMS PLOT SOUTH GATE River Brit 0 0h -
Wessex Water STUDLAND COOMBE Studland Bay 0 0h -
South West Water WINSHAM STW_PSCSOEO_WINSHAM River Axe 0 0h -
Wessex Water SWANAGE HERSTON CROSS ATTENUATION TANK River Swan 0 0h -
Wessex Water CHIDEOCK MILL LANE STORM TANK River Winniford 0 0h -
Wessex Water BRIDPORT WEST BAY ROAD REAR GARDEN OF XXX River Brit 0 0h -
Wessex Water ABBOTSBURY CHURCH STREET Mill Stream 0 0h -
Wessex Water MARTINSTOWN B3159 South Winterbourne 0 0h -
Wessex Water WEST LULWORTH HAMBURY FARM English Channel 0 0h -
Wessex Water RINGSTEAD BAY STORM TANK Unnamed Stream 0 0h -
Wessex Water STOBOROUGH RIDGE River Frome 0 0h -
South West Water GOSLINGS BRIDGE_CSO_LYME REGIS River Lim 0 0h -
South West Water WINSHAM STW_SO_WINSHAM River Axe 0 0h -
South West Water DRIMPTON SPST_PSCSOEO_DRIMPTON Temple Brook 0 0h -
Wessex Water BURTON BRADSTOCK GROVE ROAD River Bride 0 0h -
Wessex Water BRIDPORT SOUTH STREET DEPOT River Brit 0 0h -
South West Water GUN CLIFF SPST_PSCSOEO_LYME REGIS River Lim 0 0h -
Wessex Water SWANAGE DURLSTON ROAD Unnamed Stream To Durlston Bay 0 0h -
Wessex Water STOBOROUGH KINGS ARMS River Frome 0 0h -
Wessex Water BEAMINSTER SOUTHGATE River Brit 0 0h -
Wessex Water OSMINGTON PONTINS English Channel 0 0h -
Wessex Water HOLTON HEATH HOLTON HEATH SEWAGE PUMPING STATION Poole Harbour 0 0h -
South West Water THE COBB SPS_PSCSOEO_LYME REGIS Lyme Bay 0 0h -
South West Water HAWKCHURCH STW_SO_HAWKCHURCH Blackwater River/Stream 0 0h -
Wessex Water PIDDLETRENTHIDE ACROSS RIVER FROM RIVENDELL (CSO4) River Piddle 0 0h -
Wessex Water STUDLAND WADMORE LANE Little Sea 0 0h -
Wessex Water GODMANSTONE River Cerne 0 0h -
Wessex Water LITTON CHENEY CHICKSBRIDGE River Bride 0 0h -
Wessex Water STUDLAND WATERY LANE Studland Bay 0 0h 263 h
Wessex Water BURTON BRADSTOCK BURTON SOUTHOVER River Bride 0 0h -
Wessex Water BRIDPORT EAST BRIDGE River Asker 0 0h -
Wessex Water WAREHAM KEYSWORTH DRIVE STORM TANK Tidal River Piddle 0 0h -
Wessex Water MAIDEN NEWTON DORCHESTER ROAD STORM TANK River Frome 0 0h -
Wessex Water SHIPTON GORGE OFF MARKETS LANE River Bride 0 0h -
Wessex Water ABBOTSBURY B3157 PORTESHAM ROAD STORM TANK Abbotsbury Brook 0 0h -
Wessex Water CHARMOUTH THE STREET ADJ BENHARH River Char 0 0h -
Wessex Water SHILLINGSTONE STORM TANK Stour 0 0h -
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 0 0h -
Wessex Water SYDLING ST NICHOLAS NEAR HUISH FARM STORM TANK Sydling Water 0 0h -
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 0 0h -
Wessex Water CHIDEOCK SEATOWN Winniford 0 0h -
Wessex Water SWANAGE MARINE PARADE TUNNEL Swanage Bay 0 0h -
Wessex Water EAST KNIGHTON River Win 0 0h -
South West Water THORNCOMBE STW_SO_THORNCOMBE River Synderford 0 0h -
Wessex Water BRIDPORT WEST STREET River Brit 0 0h -
Wessex Water XXXXX XXXXXX HALVES COTTAGES Corfe River 0 0h 0 h
Wessex Water HARMANS CROSS TRANSFER STATION Unnamed Stream 0 0h -
Wessex Water Unknown Unknown 0 0h 2 h
Wessex Water STUDLAND WATERY LANE Studland Bay 0 0h -
Wessex Water WORTH MATRAVERS STORM TANK Stream At Winspit Botttom 0 0h -
Wessex Water BRADPOLE FISHWEIR FOUL River Asker Via Sws 0 0h -
Wessex Water BLANDFORD ST MARY BOURNEMOUTH ROAD River Stour 0 0h -
Wessex Water CORFE CASTLE XXXXX FARM ROAD STORM TANK Corfe River 0 0h -
Wessex Water BRIDPORT SOUTH BRIDGE TANK River Asker 0 0h -
Wessex Water BRIDPORT WEST BRIDGE River Brit 0 0h -
Wessex Water NETHERBURY BEAMINSTER River Brit 0 0h -
South West Water CLAPTON SPS_PSCSOEO_CREWKERNE Clapton Stream 0 0h -
Wessex Water XXXXX XXXXXX HALVES COTTAGES Corfe River 0 0h -
South West Water MOSTERTON SPS_PSCSOEO_MOSTERTON River Axe 0 0h -
Wessex Water SOUTH PERROTT NEAR PIPPLEPEN FARM STORM TANK River Parrett 0 0h -
Wessex Water WAREHAM SOUTH EAST River Frome 0 0h -
South West Water MILL LN_CSO_UPLYME River Lim 0 0h -
Wessex Water TOLLER PORCORUM TOLLER LANE INLET River Hooke 0 0h -
Wessex Water SHROTON River Iwerne 0 0h -
Wessex Water EVERSHOT OFF EAST HILL STORM TANK River Frome 0 0h -
Wessex Water CORSCOMBE OFF FUDGE HILL STORM TANK Halstock Stream 0 0h -
Wessex Water LANGTON HERRING OFF LOWER FARM INLET West Fleet 0 0h -
Wessex Water CHARMINSTER NORTH STREET River Frome 0 0h -
Wessex Water XXXXX XXXXXX GLEBE FARM Corfe River 0 0h -
Wessex Water BRIDPORT WEST BAY ROAD REAR GARDEN OF XXX River Brit 0 0h -
Wessex Water CORFE CASTLE RED LANE Corfe River 0 0h -
Wessex Water WEST MILTON INLET Mangerton River 0 0h -
Wessex Water WAREHAM ABBOTTS QUAY River Frome 0 0h -
Wessex Water WEST LULWORTH OUTFALL PS English Channel 0 0h -
Wessex Water DURWESTON WATER LANE River Stour 0 0h -
Wessex Water EAST CHALDON River Win 0 0h -
South West Water BROADWINDSOR STW_SO_BROADWINDSOR Drimpton Stream 0 0h -
Wessex Water CHARMOUTH THE STREET ADJ BENHARH River Char 0 0h -
South West Water BROADWINDSOR STW_SSO_BROADWINDSOR Drimpton Stream 0 0h -
Wessex Water BRADPOLE LEE LANE River Asker 0 0h -

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.

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