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Polluted by sewage 55 times in 2025 lasting 361 hours
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Donate NowHere are all the reported sewage overflow totals for Heswall in 2025. 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 place all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | Dee Estuary | HESWALL WASTEWATER TREATMENT WORKS | 22 | 205 | 99.4 |
| United Utilities | Prenton Brook | BARNSTON STORM TANK 51070 | 18 | 108 | 99.9 |
| Dwr Cymru Welsh Water | Dee | COTTAGE LANE PUMPING STATION | 8 | 30 | 99.9 |
| Dwr Cymru Welsh Water | River Dee Estuary | HESWALL STORAGE TANK CSO HESWALL | 6 | 16 | 99.9 |
| Dwr Cymru Welsh Water | River Dee | GAYTON PARKWAY CSO | 1 | 0 | 99.7 |
| Dwr Cymru Welsh Water | Unnamed To River Dee | GAYTON CEDARWAY PUMPING STATION | 0 | 0 | 84.5 |
| Dwr Cymru Welsh Water | Pipe To River Dee | HESWALL SEABANK ROAD | 0 | 0 | 98.7 |
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. Live sewage data from Stream Water API
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.
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Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org