South Dorset - 2025 Sewage

Polluted by sewage 1,551 hours in 2025

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

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You're looking at the totals that we have calculated for sewage in South Dorset for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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Constituencies near South Dorset

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for South Dorset, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
Wessex Water WEYMOUTH INLET Unknown 40 161 h 30m 6.71
Wessex Water WEYMOUTH INLET Unknown 24 135 h 45m 5.62
Wessex Water CORFE CASTLE XXXXX FARM ROAD STORM TANK Corfe River 20 108 h 26m 4.5
Wessex Water BOVINGTON MORRIS ROAD River Frome 21 80 h 18m 3.33
Wessex Water CORFE CASTLE XXXXX FARM ROAD STORM TANK Corfe River 8 73 h 52m 3.04
Wessex Water WOOL STATION ROAD IN GRASS VERGE River Frome 10 58 h 40m 2.42
Wessex Water XXXXX XXXXXX GLEBE FARM Corfe River 11 54 h 36m 2.25
Wessex Water WOOL STATION ROAD IN GRASS VERGE River Frome 13 51 h 36m 2.12
Wessex Water XXXX RAILWAY COTTAGES River Frome 9 50 h 15m 2.08
Wessex Water Unknown Unknown 13 49 h 50m 2.04
Wessex Water SWANAGE MARINE PARADE TUNNEL Swanage Bay 14 48 h 50m 2
Wessex Water Unknown Unknown 8 30 h 18m 1.25
Wessex Water WEYMOUTH KNIGHTSDALE ROAD ATTENUATION TANK Weymouth Harbour 10 29 h 46m 1.21
Wessex Water HARMANS CROSS TRANSFER STATION Unnamed Stream 6 29 h 37m 1.21
Wessex Water EAST BURTON CROSS ROADS River Win 4 28 h 19m 1.17
Wessex Water EAST CHALDON River Win 4 28 h 17m 1.17
Wessex Water CHURCH KNOWLE ANIMAL SANCTUARY Corfe River 7 27 h 41m 1.12
Wessex Water WEYMOUTH CHICKERELL/CHAFFEYS ATTENUATION TANK RADIPOLE River Wey 9 22 h 57m 0.92
Wessex Water EAST CHALDON River Win 5 22 h 6m 0.92
Wessex Water XXXXX XXXXXX GLEBE FARM Corfe River 4 20 h 41m 0.83
Wessex Water OSMINGTON PONTINS English Channel 11 20 h 25m 0.83
Wessex Water WORTH MATRAVERS STORM TANK Stream At Winspit Botttom 14 19 h 35m 0.79
Wessex Water WEYMOUTH RODWELL AVENUE Weymouth Harbour Via Sws 23 18 h 40m 0.75
Wessex Water BOVINGTON LYTCHETT LANE River Frome 5 18 h 2m 0.75
Wessex Water Unknown Unknown 3 17 h 16m 0.71
Wessex Water HARMANS CROSS TRANSFER STATION Unnamed Stream 3 16 h 19m 0.67
Wessex Water SWANAGE SHORE ROAD O/S NURSING HOME Ulwell Stream 7 15 h 18m 0.62
Wessex Water Unknown Unknown 5 14 h 54m 0.58
Wessex Water SWANAGE DURLSTON ROAD Unnamed Stream To Durlston Bay 16 14 h 43m 0.58
Wessex Water BOVINGTON MORRIS ROAD River Frome 3 13 h 17m 0.54
Wessex Water BOVINGTON LYTCHETT LANE River Frome 6 12 h 32m 0.5
Wessex Water WEYMOUTH ROMAN ROAD NEW Radipole Lake 21 12 h 0.5
Wessex Water WEST LULWORTH HAMBURY FARM English Channel 7 11 h 49m 0.46
Wessex Water BOVINGTON TERMINAL River Frome 2 11 h 49m 0.46
Wessex Water WEYMOUTH ROMAN ROAD NEW Radipole Lake 12 11 h 19m 0.46
Wessex Water WEYMOUTH RODWELL AVENUE Weymouth Harbour Via Sws 14 9 h 58m 0.38
Wessex Water WEYMOUTH CHICKERELL/CHAFFEYS ATTENUATION TANK RADIPOLE River Wey 8 9 h 46m 0.38
Wessex Water SWANAGE MARINE PARADE TUNNEL Swanage Bay 3 9 h 15m 0.38
Wessex Water CORFE CASTLE RED LANE Corfe River 6 9 h 11m 0.38
Wessex Water CHURCH KNOWLE ANIMAL SANCTUARY Corfe River 1 9 h 2m 0.38
Wessex Water WEYMOUTH KNIGHTSDALE ROAD ATTENUATION TANK Weymouth Harbour 3 8 h 40m 0.33
Wessex Water SWANAGE HERSTON CROSS ATTENUATION TANK River Swan 5 7 h 52m 0.29
Wessex Water RINGSTEAD BAY STORM TANK Unnamed Stream 3 7 h 23m 0.29
Wessex Water CORFE CASTLE RED LANE Corfe River 1 7 h 2m 0.29
Wessex Water OSMINGTON PONTINS English Channel 2 6 h 55m 0.25
Wessex Water PORTLAND SOUTHWELL Freshwater Bay 8 6 h 51m 0.25
Wessex Water BRIANTSPUDDLE River Piddle 1 6 h 50m 0.25
Wessex Water CORFE CASTLE STUDLAND ROAD Corfe River 5 6 h 28m 0.25
Wessex Water EAST KNIGHTON BLACKNOLL River Win 1 6 h 26m 0.25
Wessex Water SWANAGE SHORE ROAD O/S NURSING HOME Ulwell Stream 1 6 h 21m 0.25
Wessex Water PORTLAND SOUTHWELL Freshwater Bay 1 6 h 13m 0.25
Wessex Water WEYMOUTH CHICKERELL ROAD O/S ALLOTMENTS NEAR THE ADMIRAL HARDY Weymouth Harbour 5 6 h 12m 0.25
Wessex Water Unknown Unknown 6 6 h 10m 0.25
Wessex Water WYKE REGIS DONCASTER ROAD Portland Harbour 7 5 h 59m 0.21
Wessex Water XXXX RAILWAY COTTAGES River Frome 5 5 h 29m 0.21
Wessex Water STUDLAND WADMORE LANE Little Sea 1 5 h 1m 0.21
Wessex Water WEST LULWORTH HAMBURY FARM English Channel 1 4 h 43m 0.17
Wessex Water EAST KNIGHTON River Win 1 4 h 15m 0.17
Wessex Water BOVINGTON TERMINAL River Frome 1 3 h 10m 0.12
Wessex Water SWANAGE DURLSTON ROAD Unnamed Stream To Durlston Bay 1 3 h 8m 0.12
Wessex Water STUDLAND WADMORE LANE Little Sea 2 2 h 57m 0.08
Wessex Water CORFE CASTLE STUDLAND ROAD Corfe River 2 2 h 44m 0.08
Wessex Water CHICKERELL LOWER WAY River Wey 2 2 h 34m 0.08
Wessex Water WEYMOUTH MELCOMBE AVENUE Weymouth Bay 7 2 h 28m 0.08
Wessex Water WORTH MATRAVERS STORM TANK Stream At Winspit Botttom 1 2 h 27m 0.08
Wessex Water WEYMOUTH CHICKERELL ROAD O/S ALLOTMENTS NEAR THE ADMIRAL HARDY Weymouth Harbour 2 2 h 22m 0.08
Wessex Water CHICKERELL LOWER WAY River Wey 2 2 h 12m 0.08
Wessex Water SWANAGE HERSTON CROSS ATTENUATION TANK River Swan 1 2 h 10m 0.08
Wessex Water PORTLAND WESTON STREET NEW Groundwater Via Infilt System 4 2 h 6m 0.08
Wessex Water PORTLAND WESTON STREET NEW Groundwater Via Infilt System 1 1 h 50m 0.04
Wessex Water WEYMOUTH CHICKERELL ROAD BOYS CLUB Weymouth Harbour 6 1 h 40m 0.04
Wessex Water WEST LULWORTH OUTFALL PS English Channel 3 1 h 32m 0.04
Wessex Water WEYMOUTH CORONATION CRES 0/S NO.X Radipole Lake Via Sws 3 1 h 22m 0.04
Wessex Water Unknown Unknown 3 1 h 17m 0.04
Wessex Water EAST BURTON CROSS ROADS River Win 2 1 h 13m 0.04
Wessex Water WEYMOUTH CHICKERELL ROAD BOYS CLUB Weymouth Harbour 5 1 h 10m 0.04
Wessex Water STUDLAND COOMBE Studland Bay 3 1 h 3m 0.04
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 1 0 h 58m 0
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 1 0 h 58m 0
Wessex Water WEYMOUTH CRANFORD AVENUE Weymouth Bay 2 0 h 50m 0
Wessex Water WEYMOUTH CASTLE COVE OLD CASTLE ROAD WYKE REGIS Portland Harbour 2 0 h 49m 0
Wessex Water WEYMOUTH CORONATION CRES 0/S NO.X Radipole Lake Via Sws 3 0 h 48m 0
Wessex Water PORTLAND VICTORIA SQUARE Portland Harbour 1 0 h 46m 0
Wessex Water PORTLAND VICTORIA SQUARE Portland Harbour 3 0 h 44m 0
Wessex Water WEYMOUTH CRANFORD AVENUE Weymouth Bay 3 0 h 44m 0
Wessex Water WEYMOUTH CHICKERELL ROAD Weymouth Harbour 2 0 h 42m 0
Wessex Water WYKE REGIS HILLCREST ROAD Portland Harbour 1 0 h 37m 0
Wessex Water PORTLAND RAILWAY GRAVITY SEWER Lyme Bay 2 0 h 24m 0
Wessex Water WEYMOUTH ULLSWATER CRESCENT Radipole Lake Via Sws 1 0 h 18m 0
Wessex Water WYKE REGIS DONCASTER ROAD Portland Harbour 1 0 h 10m 0
Wessex Water WEYMOUTH ULLSWATER CRESCENT Radipole Lake Via Sws 2 0 h 8m 0
Wessex Water PORTLAND HIGH STREET West Bay 1 0 h 6m 0
Wessex Water PORTLAND BILL English Channel 1 0 h 4m 0
Wessex Water WEYMOUTH LONGCROFT ROAD / QUEENSLAND ROAD Weymouth Harbour 1 0 h 2m 0
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 0 0 h 0
Wessex Water WEYMOUTH SPRING LANE Weymouth Harbour Via Sws 0 0 h 0
Wessex Water WEYMOUTH SPRING LANE Weymouth Harbour Via Sws 0 0 h 0
Wessex Water AFFPUDDLE River Piddle 0 0 h 0
Wessex Water WEYMOUTH KNIGHTSDALE NEWSTEAD ROAD Weymouth Harbour 0 0 h 0
Wessex Water WYKE REGIS HILLCREST ROAD Portland Harbour 0 0 h 0
Wessex Water WEYMOUTH WESTON ROAD Weymouth Harbour 0 0 h 0
Wessex Water WEYMOUTH MARLOW ROAD Weymouth Harbour Via Sws 0 0 h 0
Wessex Water WEYMOUTH FERRYBRIDGE PORTLAND ROAD Fleet 0 0 h 0
Wessex Water WEYMOUTH MELCOMBE AVENUE Weymouth Bay 0 0 h 0
Wessex Water AFFPUDDLE River Piddle 0 0 h 0
Wessex Water PORTLAND PENNSYLVANIA ROAD Ground 0 0 h 0
Wessex Water PORTLAND BILL English Channel 0 0 h 0
Wessex Water WEST LULWORTH OUTFALL PS English Channel 0 0 h 0
Wessex Water WEYMOUTH SPA ROAD/ ROMAN ROAD AND QUEENS ROAD JCT. Radipole Lake Via Sws 0 0 h 0
Wessex Water WEYMOUTH RADIPOLE Weymouth Harbour 0 0 h 0
Wessex Water STUDLAND WATERY LANE Studland Bay 0 0 h 0
Wessex Water WEYMOUTH WARDCLIFFE ROAD Weymouth Harbour 0 0 h 0
Wessex Water WEYMOUTH CASTLE COVE OLD CASTLE ROAD WYKE REGIS Portland Harbour 0 0 h 0
Wessex Water EAST KNIGHTON River Win 0 0 h 0
Wessex Water SWANAGE MARINE PARADE X Swanage Bay 0 0 h 0
Wessex Water WEYMOUTH WESTON ROAD Weymouth Harbour 0 0 h 0
Wessex Water XXXXX XXXXXX HALVES COTTAGES Corfe River 0 0 h 0
Wessex Water WEYMOUTH GRASMERE ROAD Radipole Lake 0 0 h 0
Wessex Water WEYMOUTH SPRING ROAD NR JUNC WITH MOUNT STREET Weymouth Harbour 0 0 h 0
Wessex Water STUDLAND WATERY LANE Studland Bay 0 0 h 0
Wessex Water STUDLAND COOMBE Studland Bay 0 0 h 0
Wessex Water WEYMOUTH GRASMERE ROAD Radipole Lake 0 0 h 0
Wessex Water RINGSTEAD BAY STORM TANK Unnamed Stream 0 0 h 0
Wessex Water WEYMOUTH LONGCROFT ROAD / QUEENSLAND ROAD Weymouth Harbour 0 0 h 0
Wessex Water WEYMOUTH RADIPOLE Weymouth Harbour 0 0 h 0
Wessex Water WEYMOUTH FERRYBRIDGE PORTLAND ROAD Fleet 0 0 h 0
Wessex Water PORTLAND RAILWAY GRAVITY SEWER Lyme Bay 0 0 h 0
Wessex Water WEYMOUTH MARLOW ROAD Weymouth Harbour Via Sws 0 0 h 0
Wessex Water XXXXX XXXXXX HALVES COTTAGES Corfe River 0 0 h 0
Wessex Water WEYMOUTH KNIGHTSDALE NEWSTEAD ROAD Weymouth Harbour 0 0 h 0
Wessex Water Unknown Unknown 0 0 h 0
Wessex Water WEYMOUTH WARDCLIFFE ROAD Weymouth Harbour 0 0 h 0
Wessex Water PORTLAND PENNSYLVANIA ROAD Ground 0 0 h 0

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

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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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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