Media Queries
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org
Please Support Us
We rely on donations to fund our work. Please support us if you can
Polluted by sewage 286 times in 2025 lasting 912 hours
Your local MP is Gill German (Labour) - Find out more about their interests, donors, and voting at They Work For You
Please consider a one-off or small recurring donation. We need your help to keep this site going.
Donate NowHere are all the reported sewage overflow totals for Bae Colwyn 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 | Penrhyn Bay Via Surface Water Sewer | CSO at Penrhyn Isaf Road | 76 | 166 | 98.8 |
| Dwr Cymru Welsh Water | Penrhyn Bay | PENRHYN BAY PS MORFA RD PENRHYN BAY | 21 | 162 | 99.9 |
| Dwr Cymru Welsh Water | Penrhyn Bay | CHURCH RD PS CHURCH RD RHOS ON SEA | 45 | 158 | 87.8 |
| Dwr Cymru Welsh Water | Colwyn Bay | Old Colwyn Queens Road CSO | 15 | 103 | 99.8 |
| Dwr Cymru Welsh Water | Nant Y Flynnon | Llawr Pentre CSO (Near Beach Road) | 19 | 102 | 99.8 |
| Dwr Cymru Welsh Water | River Wydden | GLANWYDDAN PUMPING STATION | 14 | 96 | 98.4 |
| Dwr Cymru Welsh Water | Colwyn Bay | BEACH ROAD CSO BEACH RD COLWYN BAY | 27 | 85 | 99.9 |
| Dwr Cymru Welsh Water | Colwyn Bay | Old Colwyn Beach Rd | 37 | 12 | 92.7 |
| Dwr Cymru Welsh Water | Ganol | PENRHYN BAY LLANDUNDNO ROAD - | 19 | 10 | 99.8 |
| Dwr Cymru Welsh Water | Un-Named Stream | PENRHYN BAY LLANDUNDNO ROAD - | 4 | 10 | 99.9 |
| Dwr Cymru Welsh Water | Coastal Waters - Penrhyn Bay | PENRHYN HILL PENRHYN BAY | 9 | 4 | 99.5 |
| Dwr Cymru Welsh Water | Colwyn Bay | MARINE RD CSO MARINE RD COLWYN BAY | 0 | 0 | 99.9 |
| Dwr Cymru Welsh Water | Nant Y Ffynnon | PS OFF LLANELION ROAD COLWYN BAY | 0 | 0 | 99.9 |
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.
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