Wirral South polluted by sewage 1,020 times in 2023 - lasting 7,597 hours
- but monitoring was disabled in some locations, so could be more

© 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 Wirral South in 2023
18 Sites polluted by Dwr Cymru Welsh Water, United Utilities
1,020 sewage dumps
7,597 h duration
That's 10.55 months. On average 2.8 times a day
Change Over Time

Pollution Summary 2023

Here are all the reported sewage overflow totals for Wirral South 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 2 of the total 21 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities River Mersey Estuary BROMBOROUGH WWTW 324 4,069 100
United Utilities River Mersey Estuary DOCK ROAD SOUTH CSO 158 1,623 100
Dwr Cymru Welsh Water Dee Estuary HESWALL WASTEWATER TREATMENT WORKS 46 525 99.7
United Utilities River Mersey Estuary DOCK ROAD SOUTH CSO 108 451 100
United Utilities Manchester Ship Canal POWERHOUSE ROAD PUMPING STATION 86 350 100
United Utilities Mersey Estuary THE DELL COMBINED SEWER OVERFLOW 95 234 99.5
United Utilities River Mersey Estuary MAYFIELD DRIVE PS1 CSO 512EZ 33 115 100
United Utilities Mersey Estuary EASTHAM VILLAGE CSO 50 47 99.8
United Utilities Dibbinsdale Brook EASTHAM RAKE CSO 23 47 100
United Utilities Mersey Estuary THERMAL ROAD/PORT CAUSEWAY CSO 49 40 100
Dwr Cymru Welsh Water River Dee Estuary HESWALL STORAGE TANK CSO HESWALL 13 38 100
Dwr Cymru Welsh Water Dee COTTAGE LANE PUMPING STATION 6 22 100
United Utilities Boardman Brook STANTON ROAD PS 2 15 100
United Utilities Thornton Hough, Clatter THORNTON HOUGH PUMPING STATION 10 5 70.9
United Utilities Mersey Estuary BROMBOROUGH POOL VILLAGE PS 51026 2 3 100
Dwr Cymru Welsh Water River Dee GAYTON PARKWAY CSO 5 3 100
United Utilities Bromborough Pool PORT CAUSEWAY/CROSSWAY CSO 8 1 100
Dwr Cymru Welsh Water Unnamed To River Dee GAYTON CEDARWAY PUMPING STATION 2 0 56.9
United Utilities Manchester Ship Canal 3 PARK ROAD CSO 0 0 100
Dwr Cymru Welsh Water Pipe To River Dee HESWALL SEABANK ROAD 0 0 0
United Utilities River Mersey MAYFIELDS DRIVE WW NTWK PS 0 0 0

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales

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.