Southampton Test

Polluted by sewage 248 times in 2024 lasting 2,693 hours

Monitoring fell below 50% in some locations so could be more

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

Select Constituency

Select the constituency from the drop-down
✔ means we have experimental daily data since 2023

Live data for Southampton Test in 2025

So far this year (as of Apr 30, 2025, 9:00 AM) there has been 699 hours of sewage overflows

Totals for Southampton Test in 2024

7 Sites polluted by Southern Water
248 sewage dumps
2,693 hours duration
That's 3.74 months. 4.8 times a week, on average

Change Over Time

Take Action

Your local MP is Satvir Kaur (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 Southampton Test, 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
We need your support!

We managed to raise £150 in 2024. That's not enough to keep the site running. Please consider a one-off or small recurring donation.

Donate Now

Pollution Summary 2024

Here are all the reported sewage overflow totals for Southampton Test 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 1 of the total 9 CSO locations had reporting enabled for less than half the year.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Southern Water River Test MILLBROOK WWTW 122 1,630 100
Southern Water River Itchen Estuary PORTSWOOD WWTW 91 994 99.9
Southern Water Test Estuary CAWTE ROAD/PARK ROAD CSO 18 49 99.8
Southern Water River Itchen IMPERIAL ROAD MOUNT PLEASANT CEO 8 15 99.9
Southern Water River Itchen UPR SHAFTESBURY AVE SOUTHAMPTON CSO 2 1 99.8
Southern Water Itchen Estuary LAWN ROAD/OSBOURNE ROAD 4 1 66.8
Southern Water Itchen Estuary SOUTHCLIFF ROAD/LIVERPOOL STREET 3 1 26.1
Southern Water River Test Estuary BRUNEL ROAD WPS 0 0 99.8
Southern Water River Itchen CEDAR ROAD SOUTHAMPTON CSO 0 0 96.3

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.