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Polluted by sewage 619 times in 2025 lasting 4,899 hours
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Donate NowHere are all the reported sewage overflow totals for Pen-y-groes and Gorslas 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 Gwili | CROSSHANDS WWTW | 205 | 2,242 | 94.75 |
| Dwr Cymru Welsh Water | River Gwili | CWMTAWEL WWTW OFF A48 S CROSS HANDS | 103 | 1,222 | 99.9 |
| Dwr Cymru Welsh Water | River Gwili | CSO 50m D/S From Culvert Meadows R'd | 57 | 404 | 99.9 |
| Dwr Cymru Welsh Water | Nant Y Wrach | CAERBRYN R'D CSO PENYGROES CARMS | 77 | 374 | 99.9 |
| Dwr Cymru Welsh Water | Gwendraeth Fawr | Tom Jones Nursery CSO | 57 | 222 | 99.9 |
| Dwr Cymru Welsh Water | Loughor - Conf With Marlais To Conf With Aman | Nant Arw CSO, Capel Hendre | 57 | 219 | 82.3 |
| Dwr Cymru Welsh Water | Nant-Y-Ci | 153 Saron Rd CSO | 35 | 102 | 99.6 |
| Dwr Cymru Welsh Water | River Lash | Gate Road Sewage Pumping Station Penygroes | 13 | 56 | 99.9 |
| Dwr Cymru Welsh Water | Gwendraeth Fawr | Ddoll Las Temporary CSO Llanelli | 15 | 54 | 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.
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