Media Queries
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Polluted by sewage 615 times in 2024 - lasting 4,930 hours
Monitoring fell below 50% in some locations so could be more
Dee (East) was the #7 most polluted shellfish area in England & Wales, by duration of sewage overflows, as reported by the water companies
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Donate NowHere are all the reported sewage overflow totals for Dee (East) in 2024.
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 % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | Dee Estuary | NESTON PARKGATE PUMPING STATION | 145 | 1,576 | 99.9 |
| Dwr Cymru Welsh Water | Stanney Brook | NESTON WASTEWATER TREATMENT WORKS | 125 | 1,367 | 99.9 |
| Dwr Cymru Welsh Water | Dee Estuary | HESWALL WASTEWATER TREATMENT WORKS | 58 | 715 | 99.5 |
| Dwr Cymru Welsh Water | Dee Estuary | GREENFIELDS DRIVE CSO | 34 | 329 | 99.9 |
| Dwr Cymru Welsh Water | River Dee Estuary | MARSHLANDS ROAD PS | 24 | 308 | 20.5 |
| Dwr Cymru Welsh Water | Pipe To River Dee | HESWALL SEABANK ROAD | 28 | 228 | 32.9 |
| Dwr Cymru Welsh Water | Dee Estuary | HARP INN CSO | 55 | 137 | 99.9 |
| Dwr Cymru Welsh Water | Stanney Brook | TANKFIELDS CSO | 49 | 129 | 99.9 |
| Dwr Cymru Welsh Water | Dee | COTTAGE LANE PUMPING STATION | 20 | 57 | 99.8 |
| Dwr Cymru Welsh Water | Dee Estuary | 5 DEE COTTAGES CSO | 16 | 26 | 75.7 |
| Dwr Cymru Welsh Water | Unnamed Watercourse | GLADSTONE ROAD CSO | 17 | 25 | 99.9 |
| United Utilities | River Dee | LONG HEY ROAD CSO | 8 | 18 | 99 |
| Dwr Cymru Welsh Water | River Dee | GAYTON PARKWAY CSO | 11 | 7 | 98.9 |
| Dwr Cymru Welsh Water | River Dee Estuary | HESWALL STORAGE TANK CSO HESWALL | 22 | 2 | 99.4 |
| Dwr Cymru Welsh Water | Unnamed To River Dee | GAYTON CEDARWAY PUMPING STATION | 3 | 0 | 64.2 |
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