Cardiff North was polluted by sewage 461 times in 2024
lasting 3,432 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Totals for Cardiff North in 2024
9 Sites polluted by Dwr Cymru Welsh Water
461 sewage dumps
3,432 h duration
That's 4.77 months. On average 1.3 times a day
Change Over Time
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Pollution Summary 2024

Here are all the reported sewage overflow totals for Cardiff North in 2024. 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 121 1,936 89.2
Dwr Cymru Welsh Water River Rhymney Storm Water Overflow at Began, St Mellons 155 948 94.7
Dwr Cymru Welsh Water River Taff Ynys Bridge CSO 43 362 98.7
Dwr Cymru Welsh Water Rhydwaedlyd Brook Caedelyn Park Boundary CSO 49 67 99.1
Dwr Cymru Welsh Water Nant-Y-Wedal HEATHWOOD ROAD CSO, HEATHWOOD JUNCTION 46 55 98.5
Dwr Cymru Welsh Water Rhymney River Began Road CSO 7 36 98.3
Dwr Cymru Welsh Water Taff Bottom of Westbourne Crescent CSO, Cardiff 29 13 97.9
Dwr Cymru Welsh Water River Taff Via Culverted Watercourse ABERPORTH RD CSO 10 12 56
Dwr Cymru Welsh Water River Rhymney CSO at Bridge Road, St Mellons, Cardiff 1 1 99.4

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.