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Polluted by sewage 198 times in 2024 lasting 399 hours
So far this year (as of May 30, 2025, 9:30 AM) there has been 109 hours of sewage overflows
Your local MP is Amanda Martin (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Portsmouth North, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for Portsmouth North in 2024. Sometimes sewage can be being dumped for months at a time.
Reporting refers to how much of the time the monitoring was active. In this constituency all the declared CSOs appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | Portsmouth Harbour | GRUNEISON ROAD STORM PS | 69 | 139 | 81.38 |
| Southern Water | Portsmouth Harbour | NORTH END AVENUE PORTSMOUTH CSO | 49 | 92 | 99.7 |
| Southern Water | Ports Creek | COSHAM PS | 19 | 73 | 99.7 |
| Southern Water | Ports Creek | MAINLAND PS | 15 | 31 | 100 |
| Southern Water | Portsmouth Harbour | MILE END ROAD CSO | 21 | 27 | 99.5 |
| Southern Water | Portsmouth Harbour | COMMERCIAL ROAD/RUDMORE ROAD CSO | 7 | 17 | 99.5 |
| Southern Water | Langstone Harbour | KIRTLEY CLOSE DRAYTON CSO | 6 | 10 | 99.7 |
| Southern Water | Portsmouth Harbour | WIDLEY ROAD PORTSMOUTH CSO | 7 | 6 | 99.5 |
| Southern Water | Broom Channel | ST ANDREWS ROAD PORTSMOUTH CSO | 5 | 1 | 99.8 |
| Southern Water | Great Salterns Lake | BURRFIELDS ROAD PORTSMOUTH CSO | 0 | 0 | 99.6 |
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org