South Dorset

Polluted by sewage 1,056 times in 2024 lasting 5,023 hours

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Constituency

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✔ means we have experimental daily data since 2023

Live data for South Dorset in 2025

So far this year (as of Apr 30, 2025, 9:30 AM) there has been 744 hours of sewage overflows

Totals for South Dorset in 2024

50 Sites polluted by Wessex Water

1,056 sewage dumps

5,023 hours duration

That's 6.98 months. On average 2.9 times a day

Change Over Time

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Constituencies near South Dorset

Waterways in 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.

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.

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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 all the declared CSOs appeared to have monitoring enabled for more than 50% of the year

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.

Analysing sewage pollution by the Water Industry

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

South Dorset