South Dorset was polluted by sewage 1,056 times in 2024
lasting 5,023 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
Select the constituency from the drop-down
✔ means we have experimental daily data since 2023
Live data for South Dorset in 2025
So far this year (as of Apr 16, 2025, 6:15 PM) there has been 735 hours of sewage overflows
Totals for South Dorset in 2024
50 Sites polluted by Wessex Water
1,056 sewage dumps
5,023 h duration
That's 6.98 months. On average 2.9 times a day
Change Over Time
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Your local MP is Lloyd Hatton (Labour) - Find out more about their interests, donors, and voting at They Work For You

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.
     Monitoring Online      Monitoring Offline      Polluting      Potentially Polluting      Unknown
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.

Pollution Summary 2024

Here are all the reported sewage overflow totals for South Dorset in 2024. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 0 of the total 65 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Wessex Water River Frome STATION ROAD CSO 53 698 100
Wessex Water River Win BLACKNOLL 44 622 100
Wessex Water English Channel WEST LULWORTH PUMPING STATION 41 567 100
Wessex Water Corfe River CORFE CASTLE STW 54 530 99.7
Wessex Water Unknown WEYMOUTH SEWAGE TREATMENT WORKS 89 463 94.8
Wessex Water River Win EAST CHALDON PUMPING STATION 30 264 100
Wessex Water River Frome MORRIS ROAD PUMPING STATION 42 262 100
Wessex Water Corfe River GLEBE FARM PUMPING STATION 30 176 100
Wessex Water Weymouth Harbour THE MARSH COMBINED SEWER OVERFLOW 36 174 100
Wessex Water Swanage Bay SWANAGE TUNNEL 33 138 99.5
Wessex Water River Frome RAILWAY COTTAGES PUMPING STATION 48 90 100
Wessex Water Corfe River CHURCH KNOWLE ANIMAL SANCTUARY PS 23 87 99.9
Wessex Water Unnamed Stream HARMAN'S CROSS PUMPING STATION 15 80 100
Wessex Water English Channel OSMINGTON BAY HOLIDAY CENTRE PS 26 80 99.8
Wessex Water English Channel LULWORTH BEACH PUMPING STATION 17 76 98
Wessex Water River Frome LYTCHETT LANE PUMPING STATION 16 65 100
Wessex Water River Wey CHAFEY'S LAKE CSO 17 63 99.1
Wessex Water Stream At Winspit Botttom WORTH MATRAVERS WWTW 40 51 99.9
Wessex Water Unnamed Stream To Durlston Bay DURLSTON ROAD PS 44 50 100
Wessex Water Radipole Lake ROMAN ROAD COMBINED SEWER OVERFLOW 46 48 100
Wessex Water Weymouth Harbour Via Sws RODWELL AVENUE CSO 56 47 100
Wessex Water River Frome BOVINGTON TERMINAL PUMPING STATION 6 43 99.9
Wessex Water Unnamed Stream RINGSTEAD STW 8 39 100
Wessex Water Freshwater Bay SOUTHWELL PS 22 39 100
Wessex Water River Win EAST BURTON CROSS ROAD PS 9 38 100
Wessex Water Corfe River RED LANE PUMPING STATION 8 34 100
Wessex Water Weymouth Harbour ADMIRAL HARDY CSO 11 30 100
Wessex Water Ulwell Stream NEW SWANAGE ATTENUATION TANK 10 27 100
Wessex Water River Piddle BRIANTSPUDDLE SEWAGE 3 22 99.9
Wessex Water Corfe River STUDLAND ROAD PUMPING STATION 14 15 93.2
Wessex Water River Wey FAIRFIELD SEWAGE PUMPING STATION 7 14 99.9
Wessex Water Weymouth Harbour CHICKERELL ROAD CSO 33 13 99.7
Wessex Water Groundwater Via Infilt System WESTON STREET COMBINED SEWER OF 11 13 99.4
Wessex Water River Swan HERSTON CROSS ATTENUATION TANK CSO 3 9 99.8
Wessex Water Studland Bay COOMBE PUMPING STATION 3 5 99.8
Wessex Water Portland Harbour REAR DONCASTER ROAD 12 5 100
Wessex Water Little Sea WADMORE LANE PUMPING STATION 3 5 100
Wessex Water River Frome EAST KNIGHTON PUMPING STATION 1 4 100
Wessex Water Weymouth Harbour CHICKERELL BOYS CLUB CSO 21 3 99.8
Wessex Water Weymouth Bay CRANFORD AVENUE CSO 10 3 99.5
Wessex Water West Bay HIGH STREET CSO 17 2 100
Wessex Water Portland Harbour VICTORIA SQUARE PORTLAND 13 2 100
Wessex Water Weymouth Bay MELCOMBE AVENUE CSO 8 2 99.6
Wessex Water English Channel PORTLAND BILL STORM OVERFLOW 3 1 100
Wessex Water Radipole Lake Via Sws CORONATION CRESCENT CSO 5 0 100
Wessex Water Radipole Lake Via Sws ULLSWATER CRESCENT CSO 5 0 100
Wessex Water Portland Harbour CASTLE COVE PUMPING STATION 2 0 100
Wessex Water Lyme Bay PORTLAND RAILWAY GRAVITY SEWER 2 0 99.7
Wessex Water Weymouth Harbour LONGCROFT ROAD CSO 5 0 99.6
Wessex Water To Studland Bay WATERY LANE PUMPING STATION 1 0 99.6
Wessex Water Weymouth Harbour NEWSTEAD ROAD PUMPING STATION 0 0 100
Wessex Water Weymouth Harbour SPRING ROAD COMBINED SEWER OVERFLOW 0 0 100
Wessex Water Radipole Lake Via Sws SPA ROAD COMBINED SEWER OVERFLOW 0 0 100
Wessex Water Corfe River HALVES COTTAGE PUMPING STATION 0 0 100
Wessex Water Weymouth Harbour Via Sws SPRING LANE CSO 0 0 100
Wessex Water Weymouth Harbour WARDCLIFFE ROAD CSO 0 0 100
Wessex Water River Frome DUNCAN CRESCENT PUMPING STATION 0 0 99.6
Wessex Water Fleet FERRYBRIDGE PS 0 0 100
Wessex Water Ground PENNSYLVANIA ROAD PS 0 0 100
Wessex Water Portland Harbour HILLCREST ROAD PUMPIMG STATION 0 0 98
Wessex Water Radipole Lake GRASMERE ROAD CSO 0 0 100
Wessex Water River Piddle AFFPUDDLE PUMPING STATION 0 0 99.7
Wessex Water Weymouth Harbour WESTON ROAD CSO 0 0 99.6
Wessex Water Weymouth Harbour Via Sws MARLOW ROAD COMBINED SEWER OVERFLOW 0 0 100
Wessex Water Weymouth Harbour RADIPOLE LAKE PUMPING STATION 0 0 100

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. This 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.