PORTSMOUTH HARBOUR, SPITHEAD AND STOKES BAY was the #73 most polluted shellfish area in England & Wales, by duration of sewage overflows, as reported by the water companies
Here are all the reported sewage overflow totals for PORTSMOUTH HARBOUR, SPITHEAD AND STOKES BAY in 2023.
Accuracy Warning We use data from the water companies, but we are seeing many anomalies, that make us believe that location information is quite poor. The situation is likely far worse than reported here.
In particular: Totals on this page can differ from totals in the Ranked Shellfish page - number on this page are higher - this is due to a lack of standardization on shellfish area names. This page more accurately counts the differing names. For example "Solway" and "SOLWAY" are counted as different in the rankings, but correctly aggregated here.
Other CSOs may also be located nearby, however the water companies claim that these do not affect the water quality here.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Southern Water | Portsmouth Harbour | GRUNEISON ROAD STORM PS | 56 | 125 | 79.3 |
| Southern Water | Portsmouth Harbour | NORTH END AVENUE PORTSMOUTH CSO | 57 | 120 | 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 | GRUNEISON ROAD STORM PS | 3 | 6 | 54.8 |
| Southern Water | Portsmouth Harbour | GRUNEISON ROAD STORM PS | 2 | 2 | 57.9 |
| Southern Water | Portsmouth Harbour | GRUNEISON ROAD STORM PS | 2 | 1 | 54.9 |
| Southern Water | Portsmouth Harbour | COMMERCIAL ROAD/RUDMORE ROAD CSO | 1 | 0 | 99 |
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.
