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Here are all the reported sewage overflow totals for River Alyn in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Dwr Cymru Welsh Water | River Alyn | Cwmafan RFC CSO | 65 | 605 | 98.3 |
| Dwr Cymru Welsh Water | River Alyn | MOLD WwTW | 56 | 359 | 99.8 |
| Dwr Cymru Welsh Water | River Alyn | GRESFORD STW | 36 | 217 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | LLANARMON-YN-IAL STW | 59 | 177 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | CSO at Mynydd Isa Wylfa Hill | 39 | 127 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | CSO Mynydd Isa Chambers Lane/Mercia Drive Nr 2 | 48 | 102 | 79.3 |
| Dwr Cymru Welsh Water | River Alyn | llay Chapel Lane CSO, opposite Garden Centre | 15 | 42 | 58.1 |
| Dwr Cymru Welsh Water | River Alyn | CAERGWRLE - RHYDDYN HILL ROAD CSO | 13 | 36 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | Bridge Inn Pumping Station | 12 | 36 | 90.1 |
| Dwr Cymru Welsh Water | River Alyn | PONTBLYDDYN NO 1 PUMPING STATION | 3 | 27 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | CSO at Mold Gladstone St/Glan Yr Afon Rd | 24 | 21 | 99.5 |
| Dwr Cymru Welsh Water | River Alyn | CSO at Mold Committee's Sewerage System | 17 | 14 | 99.9 |
| Dwr Cymru Welsh Water | River Alyn | Pandy SPS, Wrexham | 16 | 12 | 99.8 |
| Dwr Cymru Welsh Water | River Alyn | Mold Gas Lane CSO | 10 | 5 | 99.7 |
| Dwr Cymru Welsh Water | River Alyn | Mold Old St Davids Lane/Bridge St CSO | 4 | 3 | 99.6 |
| Dwr Cymru Welsh Water | River Alyn | Mold Football Club Drice CSO | 4 | 2 | 99.6 |
| Dwr Cymru Welsh Water | River Alyn | Cefn y Bedd PS | 2 | 1 | 96.1 |
| Dwr Cymru Welsh Water | River Alyn | HOPE SARN LANE CSO | 3 | 0 | 99.7 |
| Dwr Cymru Welsh Water | River Alyn | Mold Argoed CSO | 3 | 0 | 96.1 |
| Dwr Cymru Welsh Water | River Alyn | Mold Bryn Coch Lane/Lon Y Parc CSO | 0 | 0 | 99.5 |
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