Cardiff South and Penarth was polluted by sewage 901 times in 2023
lasting 5,989 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 South and Penarth in 2023
20 Sites polluted by Dwr Cymru Welsh Water
901 sewage dumps
5,989 h duration
That's 8.32 months. On average 2.5 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Cardiff South and Penarth 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 23 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 Severn Estuary Settled Storm Overflow at Cardiff Eastern District Pumping Station 127 1,205 100
Dwr Cymru Welsh Water Severn Estuary CARDIFF EAST DISTRICT LONG OUTFALL 127 1,205 100
Dwr Cymru Welsh Water Coastal Waters Off Lavernock P COG MOORS STW CDIFF RD DINAS POWYS 97 1,159 100
Dwr Cymru Welsh Water Sully Brook CSO and EO at Penarth Stonylands Pumping Station, Penarth 73 772 97.1
Dwr Cymru Welsh Water Severn Estuary CARDIFF CENTRAL SPS TREMORFA 105 555 100
Dwr Cymru Welsh Water Severn Estuary PENARTH HEAD SEWAGE PUMPING STATION 76 372 100
Dwr Cymru Welsh Water Severn Estuary BROCKHILL RISE & LAVERNOCK RD SSO'S 95 333 100
Dwr Cymru Welsh Water Severn Estuary Penarth Marina SPS 43 109 56.4
Dwr Cymru Welsh Water Severn Estuary KYMIN PS PENARTH CARDIFF , 38 61 100
Dwr Cymru Welsh Water R Cadoxton ST CADOCS AVENUE CSO 14 52 99.8
Dwr Cymru Welsh Water Sully Brook Sully Moors Road SPS 22 51 100
Dwr Cymru Welsh Water River Ely Cogan Storm Tank Cogan Penarth 5 41 100
Dwr Cymru Welsh Water River Taff Estuary Harrowby Street PS 31 23 99.7
Dwr Cymru Welsh Water River Ely Penarth Llandough Moors Cardiff CSO, Cardiff 7 16 15.7
Dwr Cymru Welsh Water River Taff Cardiff Wood St/Havelock St Jn CSO 18 11 99.7
Dwr Cymru Welsh Water River Ely Estuary Cogan SPS 7 8 99.3
Dwr Cymru Welsh Water River Taff Park Street PS 12 4 100
Dwr Cymru Welsh Water River Ely Penarth Road WDPS 1 4 100
Dwr Cymru Welsh Water Severn Estuary OCEAN PARK PS TREMORFA FORESHORE RO 2 1 99.9
Dwr Cymru Welsh Water Sully Brook A Combined Sewer Overflow Rear Of 1 0 100
Dwr Cymru Welsh Water Cardiff Bay Curran SPS 0 0 99.9
Dwr Cymru Welsh Water Coldbrook ARGAE LANE CSO ARGAE LANE BARRY 0 0 99.8
Dwr Cymru Welsh Water Cardiff Bay Grangetown SPS 0 0 100

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.