It's a Dirty Business

Watch Channel 4's documentary about the state of the water industry.

Southampton Test - Live Sewage

Polluted by sewage 1,239 hours in 2026 so far..

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Southampton Test so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Daily Data

Jan - 583 hours
Feb - 655 hours
Mar - 0 hours
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Southern Water PORTSWOOD SSO - 115428 River Itchen Estuary 41 832 h 38m -
Southern Water MILLBROOK SSO - 115420 River Test 26 384 h 34m -
Southern Water IMPERIAL ROAD MOUNT PLEASANT CEO - 111369 River Itchen 7 14 h 47m -
Southern Water MILLBROOK CSO - 116169 River Test 3 4 h 5m -
Southern Water SIRDAR ROAD SOUTHAMPTON CSO - 108794 River Itchen 2 3 h 30m -
Southern Water PORTSWOOD SSO - 115428 River Itchen Estuary 0 0 h -
Southern Water IMPERIAL ROAD MOUNT PLEASANT CEO - 111369 River Itchen 0 0 h -
Southern Water PARK ROAD SOUTHAMPTON CSO - 108467 Test Estuary 0 0 h -
Southern Water MILLBROOK SSO - 115420 River Test 0 0 h -
Southern Water LAWN ROAD SOUTHAMPTON CSO - 108450 Itchen Estuary 0 0 h -
Southern Water SIRDAR ROAD SOUTHAMPTON CSO - 108794 River Itchen 0 0 h -
Southern Water UPPER SHAFTSBURY AVENUE SOUTHAMPTON CSO - 108792 River Itchen 0 0 h -
Southern Water LIVERPOOL STREET SOUTHAMPTON CSO - 108482 Itchen Estuary 0 0 h -
Southern Water MILLBROOK CSO - 116169 River Test 0 0 h -
Southern Water LAWN ROAD SOUTHAMPTON CSO - 108450 Itchen Estuary 0 0 h -
Southern Water LIVERPOOL STREET SOUTHAMPTON CSO - 108482 Itchen Estuary 0 0 h -
Southern Water PARK ROAD SOUTHAMPTON CSO - 108467 Test Estuary 0 0 h -

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. Live sewage data from Stream Water API

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.