Severn Estuary polluted by sewage 864 times in 2024 - lasting 9,805 hours

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
Totals for Severn Estuary in 2024
12 Sites polluted by Dwr Cymru Welsh Water
864 sewage dumps
9,805 h duration
That's 1.13 years! On average 2.4 times a day

Pollution Summary 2024

Here are all the reported sewage overflow totals for Severn Estuary in 2024. Sometimes sewage can be being dumped for months at a time.

These numbers are very slightly different from the Rivers page. We're working on it.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water Severn Estuary WESTERN VALLEY TRUNK SEWER CSO 202 4,059 92.3
Dwr Cymru Welsh Water Severn Estuary RHYMNEY VALLEY TRUNK SEWER CSO 197 3,412 99.8
Dwr Cymru Welsh Water Severn Estuary CARDIFF CENTRAL SPS TREMORFA 93 668 99
Dwr Cymru Welsh Water Severn Estuary LLANTWIT MAJOR WWTW (STW) WICK ROAD 59 474 99.8
Dwr Cymru Welsh Water Severn Estuary BROCKHILL RISE & LAVERNOCK RD SSO'S 85 372 98.1
Dwr Cymru Welsh Water Severn Estuary PENARTH HEAD SEWAGE PUMPING STATION 70 340 99.8
Dwr Cymru Welsh Water Severn Estuary Settled Storm Overflow at Cardiff Eastern District Pumping Station 50 183 99.8
Dwr Cymru Welsh Water Severn Estuary CARDIFF EAST DISTRICT LONG OUTFALL 50 183 99.8
Dwr Cymru Welsh Water Severn Estuary KYMIN PS PENARTH CARDIFF , 42 99 99.2
Dwr Cymru Welsh Water Severn Estuary Kimberley Road CSO 4 7 30.7
Dwr Cymru Welsh Water Severn Estuary Penarth Marina SPS 9 3 38.1
Dwr Cymru Welsh Water Severn Estuary OCEAN PARK PS TREMORFA FORESHORE RO 3 1 99.8

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.