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Polluted by sewage 712 times in 2025 lasting 5,864 hours
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Donate NowHere are all the reported sewage overflow totals for Glanaman 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 | River Garnant | GCG - D/S of Graig Road CSO | 158 | 1,990 | 98.1 |
| Dwr Cymru Welsh Water | River Amman | CSO Near 11 Upper Station Rd | 102 | 963 | 99.9 |
| Dwr Cymru Welsh Water | River Amman | CSO 28 AT MANHOLE 89 NR AMMAN RFC | 87 | 791 | 98.9 |
| Dwr Cymru Welsh Water | River Garnant | CSO 27 BOUNDARY RD BRIDGE GARNANT | 79 | 705 | 99.9 |
| Dwr Cymru Welsh Water | River Garnant | CSO 26 QUARRY PLACE AMMONFORD | 75 | 471 | 99.8 |
| Dwr Cymru Welsh Water | River Amman | CSO 22 SW CORNER OF DISUSED TIP | 52 | 386 | 99.9 |
| Dwr Cymru Welsh Water | River Amman | Penpound Lane CSO | 56 | 208 | 94.6 |
| Dwr Cymru Welsh Water | River Amman | CSO 29 At Manhole 76c Nr Hospital | 54 | 189 | 99.9 |
| Dwr Cymru Welsh Water | Nant Grenig | CSO 32 30M D/STRM A474 ROADBRIDGE | 14 | 92 | 99.6 |
| Dwr Cymru Welsh Water | River Amman | CSO 31 Manhole 72C Maesgrenig | 35 | 68 | 99.4 |
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
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
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