Salisbury was polluted by sewage 1,924 times in 2024
lasting 27,935 hours - that's 3.23 years!

Constituency

Select the constituency from the drop-down

✔ means we have experimental daily data since 2023

Live data for Salisbury in 2025

So far this year (as of Apr 16, 2025, 6:15 PM) there has been 11,481 hours of sewage overflows - that's 1.33 years!

Totals for Salisbury in 2024

20 Sites polluted by Southern Water, Wessex Water

1,924 sewage dumps
27,935 h duration

That's 3.23 years! On average 5.3 times a day

Change Over Time

Take Action

Your local MP is John Glen (Conservative) - Find out more about their interests, donors, and voting at They Work For You

Constituencies near Salisbury

Waterways in Salisbury

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Salisbury, 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 Salisbury 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 22 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 Bourne	HURDCOTT WASTEWATER TREATMENT WORKS	310	6,466	100
Wessex Water	River Nadder	BARFORD ST MARTIN WRC	185	3,573	100
Southern Water	River Blackwater	REDLYNCH WWTW	138	2,660	99.4
Wessex Water	River Bourne	ALLINGTON OLD INN PS	126	2,649	99.9
Wessex Water	River Avon	SALISBURY (PETERSFINGER)	123	2,563	100
Southern Water	Groundwater/River Dun	EAST GRIMSTEAD WWTW	156	2,536	99.8
Wessex Water	Fovant Brook	FOVANT WATER RECYCLING CENTRE	193	2,532	100
Wessex Water	Groundwater Via Infilt System	HINDON WASTEWATER TREATMENT WORKS	129	1,139	99.9
Wessex Water	Hampshire Avon, River	DOWNTON SEWAGE TREATMENT WORKS	99	988	99.7
Wessex Water	River Wylye Via A Reed Bed	HANGING LANGFORD PUMPING STATION	191	826	100
Wessex Water	River Bourne	HURDCOTT PS	26	498	99.2
Wessex Water	Ditch	CHILMARK PUMPING STATION	27	443	99.5
Wessex Water	River Nadder	HINDON PUMPING STATION	41	440	100
Wessex Water	River Nadder	BARFORD ST MARTIN PUMPING STATION	23	295	99.9
Wessex Water	River Nadder Via Sws	TISBURY COMBINED SEWER OVERFLOW	56	153	100
Wessex Water	River Avon Via Sw Sewer	HIGH STREET SSO	30	87	99.4
Wessex Water	River Sem	SEMLEY WATER RECYCLING CENTRE	24	53	100
Wessex Water	River Avon Via Sws	37 ENDLESS STREET CSO	42	26	99.8
Wessex Water	River Bourne	IDMISTON PUMPING STATION	2	0	99.9
Wessex Water	River Avon Via Sws	COLLEGE STREET CSO	3	0	85.4
Southern Water	River Blackwater	WHITEPARISH WWTW	0	0	100
Wessex Water	River Avon	CHURCHILL GDNS SSO	0	0	99.3

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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