Cardiff North was polluted by sewage 477 times in 2023
lasting 4,451 hours

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Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Cardiff North in 2023
8 Sites polluted by Dwr Cymru Welsh Water
477 sewage dumps
4,451 h duration
That's 6.18 months. On average 1.3 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Cardiff North in 2023. 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 0 of the total 9 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water River Taff Tongwynlais CSO 131 2,592 100
Dwr Cymru Welsh Water River Rhymney Storm Water Overflow at Began, St Mellons 166 1,393 94.6
Dwr Cymru Welsh Water River Taff Ynys Bridge CSO 47 297 99.6
Dwr Cymru Welsh Water Rhydwaedlyd Brook Caedelyn Park Boundary CSO 43 67 99.7
Dwr Cymru Welsh Water Nant-Y-Wedal HEATHWOOD ROAD CSO, HEATHWOOD JUNCTION 46 45 99.6
Dwr Cymru Welsh Water Rhymney River Began Road CSO 8 33 99.3
Dwr Cymru Welsh Water Taff Bottom of Westbourne Crescent CSO, Cardiff 25 11 98.7
Dwr Cymru Welsh Water River Taff Via Culverted Watercourse ABERPORTH RD CSO 11 11 98.7
Dwr Cymru Welsh Water River Rhymney CSO at Bridge Road, St Mellons, Cardiff 0 0 46

Data Sources & Accuracy

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. This 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.