Portsmouth North - 2025 Sewage

Polluted by sewage 272 hours in 2025

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

Which Year?

Select Another Constituency

Select the constituency from the drop-down
✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Portsmouth North for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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.

Totals for Portsmouth North in 2025

Sewage272 hours
Monitoring offline0 hours
Potential pollution0 hours
Storm overflows23

Take Action

Your local MP is Amanda Martin (Labour) - Find out more about their interests, donors, and voting at They Work For You

Share this page, post a message, and tell others about the huge problem of sewage pollution across the UK

Daily Data

Jan - 64 hours
Feb - 19 hours
Mar - 18 hours
Apr - 6 hours
May - 0 hours
Jun - 15 hours
Jul - 8 hours
Aug - 11 hours
Sept - 26 hours
Oct - 59 hours
Nov - 7 hours
Dec - 34 hours
We need your support!

Please consider a one-off or small recurring donation. We need your help to keep this site going.

Donate Now

Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Southern Water GLADYS AVENUE PORTSMOUTH CSO - 108434 Portsmouth Harbour 26 74h 21m -
Southern Water NORTH END AVENUE PORTSMOUTH CSO - 108773 Portsmouth Harbour 20 45h 16m -
Southern Water COURT LANE COSHAM SSO - 115958 Ports Creek 10 36h 31m -
Southern Water STAMSHAW ROAD PORTSMOUTH CSO - 109337 Portsmouth Harbour 8 33h 27m -
Southern Water MILE END ROAD PORTSMOUTH NO X CSO - 108459 Portsmouth Harbour 13 20h 50m -
Southern Water GLADYS AVENUE PORTSMOUTH CSO - 108434 Portsmouth Harbour 9 16h 6m -
Southern Water NORTH END AVENUE PORTSMOUTH CSO - 108773 Portsmouth Harbour 4 11h 16m -
Southern Water COURT LANE COSHAM SSO - 115958 Ports Creek 4 10h 48m -
Southern Water MAINLAND DRAYTON SSO - 115960 Ports Creek 4 10h 11m -
Southern Water MILE END ROAD PORTSMOUTH NO 1 CSO - 108415 Portsmouth Harbour 4 5h 55m -
Southern Water WIDLEY ROAD PORTSMOUTH CSO - 108772 Portsmouth Harbour 5 4h 44m -
Southern Water ST ANDREWS ROAD PORTSMOUTH CSO - 108474 Broom Channel 3 1h 49m -
Southern Water NEWCOMEN ROAD PORTSMOUTH CSO - 108460 Portsmouth Harbour 2 0h 36m -
Southern Water WINSTANLEY ROAD PORTSMOUTH CSO - 108504 Portsmouth Harbour 1 0h 4m -
Southern Water WIDLEY ROAD PORTSMOUTH CSO - 108772 Portsmouth Harbour 0 0h -
Southern Water MILE END ROAD PORTSMOUTH NO X CSO - 108459 Portsmouth Harbour 0 0h -
Southern Water MAINLAND DRAYTON SSO - 115960 Ports Creek 0 0h -
Southern Water MILE END ROAD PORTSMOUTH NO 1 CSO - 108415 Portsmouth Harbour 0 0h -
Southern Water WINSTANLEY ROAD PORTSMOUTH CSO - 108504 Portsmouth Harbour 0 0h -
Southern Water STAMSHAW ROAD PORTSMOUTH CSO - 109337 Portsmouth Harbour 0 0h -
Southern Water KIRTLEY CLOSE DRAYTON CSO - 108774 Langstone Harbour 0 0h -
Southern Water NEWCOMEN ROAD PORTSMOUTH CSO - 108460 Portsmouth Harbour 0 0h -
Southern Water ST ANDREWS ROAD PORTSMOUTH CSO - 108474 Broom Channel 0 0h -

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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.