Blaenau Gwent was polluted by sewage 1,943 times in 2023
lasting 6,316 hours
- but monitoring was disabled in some locations, so could be more

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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 Blaenau Gwent in 2023
62 Sites polluted by Dwr Cymru Welsh Water
1,943 sewage dumps
6,316 h duration
That's 8.77 months. On average 5.3 times a day
Change Over Time
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Constituencies near Blaenau Gwent
Waterways in Blaenau Gwent

Pollution Summary 2023

Here are all the reported sewage overflow totals for Blaenau Gwent 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 4 of the total 72 CSO locations had reporting enabled for less than half the year, of which 4 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water River Ebbw RIVERSIDE DOCTORS SURGERY EBBW VALE CSO 121 1,046 99.8
Dwr Cymru Welsh Water River Sirhowy CSO 32075 Opposite Garibaldi Bridge 109 800 99.9
Dwr Cymru Welsh Water Ebbw Fach R - Source To Conf Ebbw R CSO AT ABERTILLERY FOUNDARY BRIDGE NR CAR PARK 82 612 99.1
Dwr Cymru Welsh Water River Ebbw The Square Street, Abertillery CSO 63 391 98.2
Dwr Cymru Welsh Water Unnamed Drain To Ebbw Fach WVTS-Cwmtillery CSO 94 364 75.8
Dwr Cymru Welsh Water River Ebbw Fach Berea Close CSO, Blaina 43 266 63.8
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, South of Pochin Crescent 77 226 96.9
Dwr Cymru Welsh Water River Ebbw CSO NO.32031 EBBW VALE RUGBY GROUND 23 201 99.6
Dwr Cymru Welsh Water River Sirhowy CSO OPP 1 DUKESTOWN ROAD TREDEGAR 67 191 100
Dwr Cymru Welsh Water River Ebbw Fawr CWM SSO 51 184 99.8
Dwr Cymru Welsh Water Ebbw Fach River Abertillery Six Bells Colliery No. 2 CSO 32 162 70.1
Dwr Cymru Welsh Water Sirhowy River CSO at Tredegar, Vicarage Road Rear of Hill Rest 74 160 99.1
Dwr Cymru Welsh Water River Sirhowy Tredegar Park Place CSO 105 154 99.2
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, Edward Terrace Nr River Bridge 71 146 99.2
Dwr Cymru Welsh Water Nant Yr Ystruth CSO at LIBRARY ON HIGH STREET BLAINA 70 144 100
Dwr Cymru Welsh Water River Sirhowy CSO Opposite White Lion Cottages 57 127 99.3
Dwr Cymru Welsh Water Rasa Brook Under Flyover 53 121 99
Dwr Cymru Welsh Water River Sirhowy A CSO AT REAR OF CHURCH SQ TREDEGAR 54 93 100
Dwr Cymru Welsh Water Sirhowy River CSO 32084 Scwrfa Road, Tredegar 45 87 100
Dwr Cymru Welsh Water Ebbw Fawr GOSPEL HALL CSO BEAUFOR RD EBBW VA 47 78 99.6
Dwr Cymru Welsh Water River Clydach Opp Bridge End Inn CSO 38 63 98.7
Dwr Cymru Welsh Water Ebbw Fawr CSO at Ebbw Vale Victoria Reclamation Scheme 19 61 99.8
Dwr Cymru Welsh Water River Ebbw Ebbw Vale PontyGof 41 58 93.2
Dwr Cymru Welsh Water River Tillery Glan Ebbw terrace CSO, Abertillery 47 51 94.9
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, Railway View, opposite No13 53 50 99.7
Dwr Cymru Welsh Water Ebbw Fach South Griffin Colliery CSO 18 49 99.8
Dwr Cymru Welsh Water Ebbw River CSO 29 OPP THE CROFT STEELWORKS RD 26 44 78.4
Dwr Cymru Welsh Water Ebbw Fawr CSO 31 ADJ STEELWORKS RD CAR PARK 12 42 100
Dwr Cymru Welsh Water Ebbw River Tredegar Rd Nr 62A, Ebbw Vale 21 39 99.9
Dwr Cymru Welsh Water River Sirhowy WVTS-Tredegar (MH G57) CSO 18 39 99.6
Dwr Cymru Welsh Water Ebbw Fawr Beaufort Terrace CSO 15 34 99.9
Dwr Cymru Welsh Water Ebbw River Allotment Rd CSO 5 32 98.9
Dwr Cymru Welsh Water Sirhowy River Morgan St CSO, Tredegar 25 26 96.8
Dwr Cymru Welsh Water Nant Melyn/Rasa Brook Coedcae House CSO 15 25 97.2
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, Brompton SSO 1 MH No GN86A 25 21 99.9
Dwr Cymru Welsh Water Ebbw Fawr CSO O/S Beaufort Arms, Beaufort Rd, Ebbw Vale 43 17 100
Dwr Cymru Welsh Water Ebbw Fach Abertillery Park View Terrace CSO 18 12 99.9
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, Vale Terrace R/O 101 U/S Garage 22 11 99.4
Dwr Cymru Welsh Water Ebbw Fawr CSO at Opp No 11 Brynhyfryd Terr Ebbw Vale 15 10 100
Dwr Cymru Welsh Water Ebbw Fach CSO at Abertillery Six Bells 16 8 99.8
Dwr Cymru Welsh Water Sirhowy River Tredegar Vale Terrace R/O 61 11 8 29.6
Dwr Cymru Welsh Water Ebbw River CSO AT LLANHILLETH DISUSED COLLIERY 23 6 100
Dwr Cymru Welsh Water Ebbw River Lambs Square CSO 5 6 72.1
Dwr Cymru Welsh Water Sirhowy River Tredegar Ladies Row CSO o/s School Entrance 6 5 97.6
Dwr Cymru Welsh Water River Ebbw Fach West Side Sewer CSO 15 5 99.8
Dwr Cymru Welsh Water Ebbw River Brooklyn Terrace CSO 16 4 100
Dwr Cymru Welsh Water Ebbw River Commercial Rd 12 4 99.9
Dwr Cymru Welsh Water River Ebbw Cwn Marine St CSO 4 3 99.8
Dwr Cymru Welsh Water Culverted River Fac CSO at Nantyglo Market Rd under crash barrier 3 2 99.9
Dwr Cymru Welsh Water River Ebbw Fach WVTS-Nantyglo Station SSO 2 2 100
Dwr Cymru Welsh Water River Ebbw Fach CSO at Limestone Road 1 1 100
Dwr Cymru Welsh Water Ebbw River Excelsior Street (rear lane) 5 1 100
Dwr Cymru Welsh Water River Ebbw Fach Abertillery Six Bells Rd 1 0 100
Dwr Cymru Welsh Water Ebbw Fawr CSO at Ebbw Vale Junction of Tredegar Rd & Harcourt St 1 0 99.9
Dwr Cymru Welsh Water Ebbw Fach Castle St CSO, Abertillery 1 0 100
Dwr Cymru Welsh Water Ebbw River CWM (EBBW VALE) CSO 1 0 45.8
Dwr Cymru Welsh Water Ebbw Fawr Via A Surface Water Culvert CSO at Ebbw Vale Queens Square 1 0 100
Dwr Cymru Welsh Water River Tillery CSO at R/O ST MICHAELS CHURCH ABERTILLERY 1 0 100
Dwr Cymru Welsh Water River Ebbw CSO at R/O PH Beaufort Rd / R/O 23 Lillian Grove 1 0 100
Dwr Cymru Welsh Water Ebbw Fawr CSO at Ebbw Vale Beaufort Rd & Badminton Grove Junction 1 0 100
Dwr Cymru Welsh Water Ebbw Fach Nantyglo Farm Rd/Market Rd Junction CSO 1 0 100
Dwr Cymru Welsh Water River Tillery Tillery St No9 CSO, Abertillery 1 0 99.5
Dwr Cymru Welsh Water Ebbw Fach Abertillery Six Bells Colliery No.1 CSO 0 0 0
Dwr Cymru Welsh Water Ebbw Fach OLD SOUTH GRIFFIN COLLIERY CSO 0 0 99.9
Dwr Cymru Welsh Water River Ebbw Lambs Square/Lower Square 0 0 0
Dwr Cymru Welsh Water River Tillery Commercial St CSO, Abertillery 0 0 100
Dwr Cymru Welsh Water Ebbw Fach River Abertillery Victoria Road Six Bells CSO 0 0 12.6
Dwr Cymru Welsh Water Ebbw Fawr CSO Adj to The Institute 0 0 0
Dwr Cymru Welsh Water Ebbw River CSO at Rear of 4 Harcourt Street, Ebbw Vale 0 0 99.9
Dwr Cymru Welsh Water River Sirhowy CSO at St James Close Maes-Y-Coed,Tredegar 0 0 41.5
Dwr Cymru Welsh Water River Sirhowy CSO at Tredegar, Vale Terrace R/O 123 0 0 72.2
Dwr Cymru Welsh Water River Clydach BRYNMAWR STW BLACKROCK BRYNMAWR 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, 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.

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