Southampton, Test was polluted by sewage 256 times in 2023
lasting 2,660 hours

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Southampton, Test in 2023
7 Sites polluted by Southern Water
256 sewage dumps
2,660 h duration
That's 3.69 months. 4.9 times a week, on average
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Southampton, Test in 2023. 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 9 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 %
Southern Water River Test MILLBROOK WWTW 116 1,640 100
Southern Water River Itchen Estuary PORTSWOOD WWTW 91 927 100
Southern Water Test Estuary CAWTE ROAD/PARK ROAD CSO 33 66 100
Southern Water River Itchen IMPERIAL ROAD MOUNT PLEASANT CEO 8 21 99.9
Southern Water Itchen Estuary SOUTHCLIFF ROAD/LIVERPOOL STREET 2 1 92
Southern Water Itchen Estuary LAWN ROAD/OSBOURNE ROAD 4 1 84.9
Southern Water River Itchen UPR SHAFTESBURY AVE SOUTHAMPTON CSO 2 0 99.9
Southern Water River Test Estuary BRUNEL ROAD WPS 0 0 100
Southern Water River Itchen CEDAR ROAD SOUTHAMPTON CSO 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.