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Portsmouth North - 2025 Sewage

Polluted by sewage 272 hours in 2025

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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 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.

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Constituencies near Portsmouth North

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
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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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 74 h 21m -
Southern Water NORTH END AVENUE PORTSMOUTH CSO - 108773 Portsmouth Harbour 20 45 h 16m -
Southern Water COURT LANE COSHAM SSO - 115958 Ports Creek 10 36 h 31m -
Southern Water STAMSHAW ROAD PORTSMOUTH CSO - 109337 Portsmouth Harbour 8 33 h 27m -
Southern Water MILE END ROAD PORTSMOUTH NO X CSO - 108459 Portsmouth Harbour 13 20 h 50m -
Southern Water GLADYS AVENUE PORTSMOUTH CSO - 108434 Portsmouth Harbour 9 16 h 6m -
Southern Water NORTH END AVENUE PORTSMOUTH CSO - 108773 Portsmouth Harbour 4 11 h 16m -
Southern Water COURT LANE COSHAM SSO - 115958 Ports Creek 4 10 h 48m -
Southern Water MAINLAND DRAYTON SSO - 115960 Ports Creek 4 10 h 11m -
Southern Water MILE END ROAD PORTSMOUTH NO 1 CSO - 108415 Portsmouth Harbour 4 5 h 55m -
Southern Water WIDLEY ROAD PORTSMOUTH CSO - 108772 Portsmouth Harbour 5 4 h 44m -
Southern Water ST ANDREWS ROAD PORTSMOUTH CSO - 108474 Broom Channel 3 1 h 49m -
Southern Water NEWCOMEN ROAD PORTSMOUTH CSO - 108460 Portsmouth Harbour 2 0 h 36m -
Southern Water WINSTANLEY ROAD PORTSMOUTH CSO - 108504 Portsmouth Harbour 1 0 h 4m -
Southern Water MILE END ROAD PORTSMOUTH NO X CSO - 108459 Portsmouth Harbour 0 0 h -
Southern Water MAINLAND DRAYTON SSO - 115960 Ports Creek 0 0 h -
Southern Water WINSTANLEY ROAD PORTSMOUTH CSO - 108504 Portsmouth Harbour 0 0 h -
Southern Water NEWCOMEN ROAD PORTSMOUTH CSO - 108460 Portsmouth Harbour 0 0 h -
Southern Water ST ANDREWS ROAD PORTSMOUTH CSO - 108474 Broom Channel 0 0 h -
Southern Water MILE END ROAD PORTSMOUTH NO 1 CSO - 108415 Portsmouth Harbour 0 0 h -
Southern Water KIRTLEY CLOSE DRAYTON CSO - 108774 Langstone Harbour 0 0 h -
Southern Water WIDLEY ROAD PORTSMOUTH CSO - 108772 Portsmouth Harbour 0 0 h -
Southern Water STAMSHAW ROAD PORTSMOUTH CSO - 109337 Portsmouth Harbour 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.

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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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