Portsmouth Harbour polluted by sewage 170 times in 2022 - lasting 386 hours

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Totals for Portsmouth Harbour in 2022
13 Sites polluted by Southern Water
170 sewage dumps
386 h duration
That's 16.08 days. 3.3 times a week, on average

Pollution Summary 2022

Here are all the reported sewage overflow totals for Portsmouth Harbour in 2022. Sometimes sewage can be being dumped for months at a time.

These numbers are very slightly different from the Rivers page - This is because there is an invalid grid reference on the pollution consent - so we don't know where the CSO is. We're working on it.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Southern Water Portsmouth Harbour GROVE ROAD GOSPORT CEO 24 106 100
Southern Water Portsmouth Harbour GRUNEISON ROAD STORM PS 56 100 84.6
Southern Water Portsmouth Harbour NORTH END AVENUE PORTSMOUTH CSO 46 100 99.6
Southern Water Portsmouth Harbour HARDWAY CEO, PRIORY ROAD, GOSPORT 3 16 99.7
Southern Water Portsmouth Harbour MILE END ROAD CSO 12 14 81.7
Southern Water Portsmouth Harbour CAMBRIDGE ROAD/BROCKHURST ROAD PS 3 13 99.8
Southern Water Portsmouth Harbour WICOR MILL LANE PORTCHESTER CEO 4 10 100
Southern Water Portsmouth Harbour WIDLEY ROAD PORTSMOUTH CSO 11 9 100
Southern Water Portsmouth Harbour SALTERNS LANE FAREHAM CEO 2 6 99.8
Southern Water Portsmouth Harbour MIDDLECROFT LANE GOSPORT CSO 1 2 100
Southern Water Portsmouth Harbour COMMERCIAL ROAD/RUDMORE ROAD CSO 4 2 81.7
Southern Water Portsmouth Harbour COW LANE PORTCHESTER CEO 3 1 99.9
Southern Water Portsmouth Harbour THE ANCHORAGE GOSPORT CEO 1 1 99.9
Southern Water Portsmouth Harbour SALTERNS LANE FAREHAM O/S 12 CSO 0 0 99.5
Southern Water Portsmouth Harbour HARBOUR ROAD GOSPORT CEO 0 0 100
Southern Water Portsmouth Harbour LEES LANE GOSPORT CEO 0 0 99.9
Southern Water Portsmouth Harbour ST MATTHEWS SQUARE GOSPORT CEO 0 0 100
Southern Water Portsmouth Harbour MUMBY ROAD GOSPORT WPS/CEO 0 0 100
Southern Water Portsmouth Harbour HOLBROOK ROAD/PYNING STREET CSO 0 0 98.1

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales

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.