Cardiff West was polluted by sewage 710 times in 2023
lasting 6,977 hours

© OpenStreetMap contributors
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 West in 2023
8 Sites polluted by Dwr Cymru Welsh Water
710 sewage dumps
6,977 h duration
That's 9.69 months. On average 1.9 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Cardiff West 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 8 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 Clun RHIWSAESON STW RHIWSAESON LLANTRI Settled Storm 214 2,383 100
Dwr Cymru Welsh Water Nant Glaswg Creigiau Sewage Treatment Works Hoel Settled Storm 116 1,931 92.7
Dwr Cymru Welsh Water River Elai St Fagans STW 119 1,472 100
Dwr Cymru Welsh Water Nant Dowlais RHYDLAFAR STW ST FAGANS CARDIFF 130 669 100
Dwr Cymru Welsh Water Nant Henstaff CREIGIAU PS 67 386 100
Dwr Cymru Welsh Water River Ely CSO at TRELAI PARK STORM SEWAGE PS 48 129 92.7
Dwr Cymru Welsh Water River Ely Ely Mill Rd/Muston Rd CSO, Cardiff 14 4 100
Dwr Cymru Welsh Water River Ely CSO at Cardiff Ely Plymouth Rd No 108 2 0 99.6

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.