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Here are all the reported sewage overflow totals for Menai Strait 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 | Menai Strait | BRYNSCIENCYN STW | 184 | 2,785 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | LLANDEGFAN (MENAI) PUMPING STATION | 85 | 1,707 | 93.7 |
| Dwr Cymru Welsh Water | Menai Strait | TREBORTH STW (FINAL) BANGOR | 106 | 1,187 | 99.85 |
| Dwr Cymru Welsh Water | Menai Strait | ABERGWYNGREGYN PUMPING STATION | 32 | 592 | 99.3 |
| Dwr Cymru Welsh Water | Menai Strait | LLANFAIR PG WWTW | 107 | 590 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 1 (FAELOG CAUSEWAY) (EMERGENC | 60 | 338 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 1 (FAELOG CAUSEWAY) (EMERGENC | 60 | 338 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | LLANFAES WWTW | 53 | 332 | 99 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 3 (SUSPENSION BRIDGE) (EMERGE | 60 | 185 | 99.8 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 3 (SUSPENSION BRIDGE) (EMERGE | 60 | 185 | 99.8 |
| Dwr Cymru Welsh Water | Menai Strait | MOUNT FIELD P.S. BEAUMARIS , | 34 | 163 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | FELINHELI PS (QUAY COTTAGE) , , | 23 | 148 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | LLEINIOG PS | 52 | 145 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | BRYNSCIENCYN PS , , | 13 | 103 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | BRYNSCIENCYN PS | 12 | 90 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | RHIANFA PS LLANDEGFAN | 22 | 61 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | WEST END PS BEAUMARIS ANGLESEY | 16 | 55 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | BEACH ROAD PS BANGOR , | 35 | 35 | 77.7 |
| Dwr Cymru Welsh Water | Menai Strait | COLEG NORMAL SEWAGE PUMPING STATION | 5 | 6 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | GLYN GARTH PS LLANDEGFAN | 7 | 4 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | Gorad Road SPS | 1 | 0 | 99.5 |
| Dwr Cymru Welsh Water | Menai Strait | FELINHELI PS (ADJ TO QUAY TOILETS) | 0 | 0 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | FELINHELI PS (OPP SEA CADET CORPS) | 0 | 0 | 99.9 |
| Dwr Cymru Welsh Water | Menai Strait | WATERLOO PORT SEWAGE PUMPING ST | 0 | 0 | 99.2 |
| Dwr Cymru Welsh Water | Menai Strait | LLYN Y FELIN PS (EMERGENCY) | 0 | 0 | 95.5 |
| Dwr Cymru Welsh Water | Menai Strait | LLYN Y FELIN PS (EMERGENCY) , , | 0 | 0 | 95.5 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 2 (PORTH WRACH) (EMERGENCY) | 0 | 0 | 99.8 |
| Dwr Cymru Welsh Water | Menai Strait | PS NO 2 (PORTH WRACH) (EMERGENCY) | 0 | 0 | 99.8 |
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