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Here are all the reported sewage overflow totals for River Wye 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 Wye | CSO at Welsh Street Chepstow | 130 | 1,054 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | NEWLAND SEWAGE TREATMENT WORKS | 91 | 862 | 98.8 |
| Dwr Cymru Welsh Water | River Wye | SPS AT EARDISLEY STW | 37 | 529 | 94.2 |
| Dwr Cymru Welsh Water | River Wye | MONMOUTH STW REDBROOK ROAD MONMOUTH | 43 | 435 | 99.8 |
| Dwr Cymru Welsh Water | River Wye | EIGN WASTEWATER TREATMENT WORKS | 47 | 405 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | JOYFORD MILL PUMPING STATION | 24 | 375 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | SEDBURY SEWAGE PUMPING STATION | 59 | 332 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Tintern Main SPS | 20 | 326 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | PUMPING STATION AT MOCCAS STW | 21 | 300 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | The Strand CSO, Church Street, Builth Wells | 64 | 276 | 99.5 |
| Dwr Cymru Welsh Water | River Wye | HOPE AND ANCHOR CSO | 56 | 273 | 95.8 |
| Dwr Cymru Welsh Water | River Wye | LYDBROOK SEWAGE TREATMENT WORKS SSO | 24 | 251 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Glasbury STW Glasbury Nr Hay On Wye | 38 | 232 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Storm Tanks at Rhayader STW | 40 | 216 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Monmouth 2 CSO | 38 | 140 | 100 |
| Dwr Cymru Welsh Water | River Wye | CHURCH LANE STW CHURCH ROAD | 18 | 104 | 99.5 |
| Dwr Cymru Welsh Water | River Wye | CSO at Rhayader WwTW | 41 | 99 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | ROSS LOWER CLEEVE WWTW | 21 | 99 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | ST MARTINS ALLOTMENTS CSO HEREFORD | 31 | 96 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Thornwell Road CSO | 49 | 63 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | HOMS ROAD PUMPING STATION CSO | 23 | 61 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | Hay-on-Wye (Main) SPS | 40 | 54 | 90.2 |
| Dwr Cymru Welsh Water | River Wye | BELMONT ROUNDABOUT CSO | 9 | 50 | 94.1 |
| Dwr Cymru Welsh Water | River Wye | NEWBRIDGE-ON-WYE STW POWYS | 26 | 43 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | GREYFRIARS BRIDGE CSO | 15 | 32 | 92.8 |
| Dwr Cymru Welsh Water | River Wye | FOWNHOPE SEWAGE TREATMENT WORKS | 10 | 29 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | WYEBANK RD CSO | 28 | 29 | 78.9 |
| Dwr Cymru Welsh Water | River Wye | WILTON SEWAGE PUMPING STATION | 4 | 26 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | EIGN 1B COMBINED SEWER OVERFLOW | 8 | 24 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | GREAT HOUGH BROOK CSO | 10 | 13 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | CSO Llanelwedd - Scout Hut Station Road | 2 | 11 | 96.9 |
| Dwr Cymru Welsh Water | River Wye | North Road CSO North Rd Builth Well | 11 | 8 | 100 |
| Dwr Cymru Welsh Water | River Wye | Raglan Way CSO | 12 | 7 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | GREAT HOUGHBROOK PS ADJACENT TO FOR | 3 | 4 | 99.8 |
| Dwr Cymru Welsh Water | River Wye | CSO at Rhayader Fields St. Brides Church | 4 | 1 | 99.1 |
| Dwr Cymru Welsh Water | River Wye | LOWER LYDBROOK RIVER WYE CSO | 1 | 0 | 100 |
| Dwr Cymru Welsh Water | River Wye | CSO at Weun Chapel Park Toilets, Rhayader | 0 | 0 | 100 |
| Dwr Cymru Welsh Water | River Wye | Hay-on-Wye (Warren Close) SPS | 0 | 0 | 99.8 |
| Dwr Cymru Welsh Water | River Wye | LLYSWEN STW CHURCH ROAD LLYSWEN | 0 | 0 | 99.9 |
| Dwr Cymru Welsh Water | River Wye | LEYMANS FIELD PS BRAEMAR GARDENS | 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