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Polluted by sewage 665 times in 2025 lasting 3,377 hours
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Donate NowHere are all the reported sewage overflow totals for Clwyd North 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 constituency 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 | Coastal Waters | PENSARN SPS ABERGELE STORM | 71 | 606 | 99.9 |
| Dwr Cymru Welsh Water | River Clwyd | DENBIGH WWTW | 57 | 541 | 99 |
| Dwr Cymru Welsh Water | Coastal Waters - Liverpool Bay | RHYL (KINMEL BAY) WWTW KINMEL BAY | 35 | 410 | 99.9 |
| Dwr Cymru Welsh Water | Bodelwyddan Drain | BODELWYDDAN MAIN SPS | 27 | 174 | 99.9 |
| Dwr Cymru Welsh Water | Penrhyn Bay | CHURCH RD PS CHURCH RD RHOS ON SEA | 45 | 158 | 87.8 |
| Dwr Cymru Welsh Water | River Meirchion | HENLLAN STW | 59 | 113 | 99.9 |
| Dwr Cymru Welsh Water | Liverpool Bay | LLANDDULAS PS LLANDULAS | 20 | 104 | 99.9 |
| 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 | Coastal Waters | COVENTRY CAMP SPS STORM | 18 | 100 | 99.9 |
| Dwr Cymru Welsh Water | Coastal Waters/Irish Sea | WESTBOURNE AVENUE PUMPING STATION | 11 | 97 | 99.9 |
| Dwr Cymru Welsh Water | River Ystrad | RUTHIN ROAD ROUNDABOUT CSO DENBIGH | 28 | 93 | 99.9 |
| Dwr Cymru Welsh Water | Clwyd | Plas Yn Green CSO | 15 | 90 | 99.9 |
| Dwr Cymru Welsh Water | Colwyn Bay | BEACH ROAD CSO BEACH RD COLWYN BAY | 27 | 85 | 99.9 |
| Dwr Cymru Welsh Water | River Clwyd | CSO AT GAMEKEEPER PH, LOWER STREET, ST ASAPH | 12 | 73 | 99.9 |
| Dwr Cymru Welsh Water | River Elwy | St Asaph Roe Parc CSO | 11 | 71 | 99.7 |
| Dwr Cymru Welsh Water | Ffynnon Y Ddol Channel | MAES Y LLAN CSO | 10 | 69 | 87.1 |
| Dwr Cymru Welsh Water | Ffynnon Y Ddol Channel | KERFOOT CARAVAN PARK CSO | 7 | 53 | 99.9 |
| Dwr Cymru Welsh Water | Henllan Brook | Panton Hall CSO | 34 | 50 | 99.9 |
| Dwr Cymru Welsh Water | Rhyl Cut | Coast Road PS Rhyl | 9 | 47 | 99.7 |
| Dwr Cymru Welsh Water | River Clwyd | Rhuddlan Wastewater Treatment Works Storm Tanks | 11 | 42 | 99.6 |
| Dwr Cymru Welsh Water | River Gele | Berthglyd Combined Sewer Overflow | 10 | 36 | 99.7 |
| Dwr Cymru Welsh Water | Henllan Brook | Dalar Wen Sewage Pumping Station | 30 | 33 | 99.9 |
| Dwr Cymru Welsh Water | R Dee | RHUDDLAN NETWORK TANK CSO | 5 | 31 | 99.8 |
| Dwr Cymru Welsh Water | River Clwyd | RHUDDLAN WWTW FINAL | 6 | 22 | 99.6 |
| Dwr Cymru Welsh Water | Colwyn Bay | Old Colwyn Beach Rd | 37 | 12 | 92.7 |
| Dwr Cymru Welsh Water | Henllan Brook | Frongoch (Rear of Magistrates Court) CSO | 5 | 9 | 66.9 |
| Dwr Cymru Welsh Water | Unnamed Drain To Ricer Clwyd | Trefnant Village CSO | 6 | 8 | 99.6 |
| Dwr Cymru Welsh Water | Coastal Waters/Irish Sea | WESTBOURNE AVENUE CSO NO.2 | 5 | 8 | 99.5 |
| Dwr Cymru Welsh Water | River Dulas | Rhyd Y Foel PS | 6 | 7 | 99.9 |
| Dwr Cymru Welsh Water | Kinmel Bay Drain | FORYD RD EMERGENCY KINMEL BAY , | 2 | 6 | 100 |
| Dwr Cymru Welsh Water | Nant Padrig | Brondyffyn CSO | 4 | 4 | 99.8 |
| Dwr Cymru Welsh Water | Rhyl Cut | CLIFTON PARK CSO NO.2 | 1 | 3 | 100 |
| Dwr Cymru Welsh Water | River Ffyddion | Fford Aber CSO | 3 | 2 | 99.7 |
| Dwr Cymru Welsh Water | Rhyl Cut | CLIFTON PARK ROAD CSO NO.1 | 1 | 2 | 86.7 |
| Dwr Cymru Welsh Water | Henllan Brook Via Surface Water Sewer | Henllan Street CSO | 2 | 0 | 99.7 |
| Dwr Cymru Welsh Water | Henllan Brook | Abbey Road CSO | 1 | 0 | 97.7 |
| Dwr Cymru Welsh Water | Coastal Waters - Irish Sea | LLYSFAEN | 0 | 0 | 99.7 |
| 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 |
| Dwr Cymru Welsh Water | Rhyl Cut | TY NEWYDD PUMPING STATION | 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.
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Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org