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Portsmouth Harbour polluted by sewage 186 times in 2023 - lasting 512 hours

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
Totals for Portsmouth Harbour in 2023
12 Sites polluted by Southern Water
186 sewage dumps
512 h duration
That's 21.33 days. 3.6 times a week, on average

Pollution Summary 2023

Here are all the reported sewage overflow totals for Portsmouth Harbour in 2023. Sometimes sewage can be being dumped for months at a time.

These numbers are very slightly different from the Rivers page. We're working on it.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Southern Water Portsmouth Harbour GRUNEISON ROAD STORM PS 63 136 61.73
Southern Water Portsmouth Harbour GROVE ROAD GOSPORT CEO 18 134 99.8
Southern Water Portsmouth Harbour NORTH END AVENUE PORTSMOUTH CSO 57 120 99.9
Southern Water Portsmouth Harbour WICOR MILL LANE PORTCHESTER CEO 15 70 99.9
Southern Water Portsmouth Harbour CAMBRIDGE ROAD/BROCKHURST ROAD PS 5 18 99.9
Southern Water Portsmouth Harbour MILE END ROAD CSO 10 9 99
Southern Water Portsmouth Harbour WIDLEY ROAD PORTSMOUTH CSO 10 7 99.1
Southern Water Portsmouth Harbour HARDWAY CEO, PRIORY ROAD, GOSPORT 2 7 100
Southern Water Portsmouth Harbour THE ANCHORAGE GOSPORT CEO 2 5 99.9
Southern Water Portsmouth Harbour MIDDLECROFT LANE GOSPORT CSO 2 1 99.9
Southern Water Portsmouth Harbour COMMERCIAL ROAD/RUDMORE ROAD CSO 1 0 99
Southern Water Portsmouth Harbour COW LANE PORTCHESTER CEO 1 0 99.9
Southern Water Portsmouth Harbour SALTERNS LANE FAREHAM CEO 0 0 99.7
Southern Water Portsmouth Harbour SALTERNS LANE FAREHAM O/S 12 CSO 0 0 99.9
Southern Water Portsmouth Harbour LEES LANE GOSPORT CEO 0 0 97.8
Southern Water Portsmouth Harbour ST MATTHEWS SQUARE GOSPORT CEO 0 0 99.8
Southern Water Portsmouth Harbour MUMBY ROAD GOSPORT WPS/CEO 0 0 99.9
Southern Water Portsmouth Harbour HARBOUR ROAD GOSPORT CEO 0 0 99.9
Southern Water Portsmouth Harbour HOLBROOK ROAD/PYNING STREET 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.