Top of the Poops | Constituency Sewage Map - Live Data| Blaenau Gwent and Rhymney

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Blaenau Gwent and Rhymney so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

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Constituencies near Blaenau Gwent and Rhymney

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Brynmawr Blackrock WwTW Storm Overflow	River Clydach	48	876 h	-
Dwr Cymru Welsh Water	Deri Riverside Walk Bargoed Storm Overflow	Nant Bargod Rhymni	35	420 h 15m	-
Dwr Cymru Welsh Water	Bedwellty Road Bridge Storm Overflow	River Taff Bargoed	43	338 h 41m	-
Dwr Cymru Welsh Water	Beaufort Allotment Road Bridge Storm Overflow	River Ebbw	31	277 h 45m	-
Dwr Cymru Welsh Water	The Square Street Abertillery Storm Overflow	River Ebbw	20	252 h 53m	-
Dwr Cymru Welsh Water	Berea Close Storm Overflow	Ebbw Fach River	17	239 h 50m	-
Dwr Cymru Welsh Water	Abertysswg Troedrhiwfuwch Storm Overflow	River Rhymni	25	229 h 54m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 2 Storm Overflow	Ebbw Fach River	16	166 h 2m	-
Dwr Cymru Welsh Water	Commercial Road Abertillery Storm Overflow	River Ebbw	18	128 h 43m	-
Dwr Cymru Welsh Water	Marine Street Industrial Estate Storm Overflow	River Ebbw	19	116 h 20m	-
Dwr Cymru Welsh Water	Steelworks Road and Clos Pen Y Cae Storm Overflow	River Ebbw	28	89 h	-
Dwr Cymru Welsh Water	Garibaldi Bridge Storm Overflow	River Sirhowy	20	78 h	-
Dwr Cymru Welsh Water	New Tredegar Business Park West Storm Overflow	River Rhymni	9	74 h 51m	-
Dwr Cymru Welsh Water	Dukestown road Tredegar Storm Overflow	Sirhowy River	15	72 h 45m	-
Dwr Cymru Welsh Water	Aubrey Terrace Overflow	Ebbw River	14	66 h 48m	-
Dwr Cymru Welsh Water	Pontlottyn Old Gasworks Storm Overflow	River Rhymni	10	64 h 45m	-
Dwr Cymru Welsh Water	Commercial street near Sirhowy river Storm Overflow	Sirhowy River	17	64 h 15m	-
Dwr Cymru Welsh Water	Rhymney Walk Storm Overflow	The River Rhymney	16	61 h 20m	-
Dwr Cymru Welsh Water	Castle Street Abertillery Overflow	River Ebdw Fach	20	60 h 10m	-
Dwr Cymru Welsh Water	Glan Ebbw Terrace Storm Overflow	River Tillery	7	54 h 11m	-
Dwr Cymru Welsh Water	Abertillery Tillery Street Storm Overflow	River Tillery	13	41 h 54m	-
Dwr Cymru Welsh Water	Tredegar Greenfield Ter Storm Overflow	Sirhowy River	16	39 h 25m	-
Dwr Cymru Welsh Water	Park Place Storm Overflow	River Sirhowy	13	37 h 56m	-
Dwr Cymru Welsh Water	Bethania Cottages Storm Overflow	River Rhymni	14	29 h 43m	-
Dwr Cymru Welsh Water	The Terrace Rhymney Storm Overflow	River Rhymni	9	27 h 8m	-
Dwr Cymru Welsh Water	Vicarage Rd Rear of Hill Rest Tregerar Storm Overflow	River Sirhowy	13	25 h 42m	-
Dwr Cymru Welsh Water	South of Pochin Crescent Storm Overflow	Sirhowy River	7	24 h 55m	-
Dwr Cymru Welsh Water	Bargoed Viaduct Storm Overflow	River Rhymni	10	23 h 53m	-
Dwr Cymru Welsh Water	South Griffin Colliery Storm Overflow	Ebbw Fach River	11	22 h 10m	-
Dwr Cymru Welsh Water	Chapel Road Six Bells Storm Overflow	River Ebbw Fach	12	21 h 54m	-
Dwr Cymru Welsh Water	King Street Brynmawr Storm Overflow	Ebbw Fach River	8	21 h 43m	-
Dwr Cymru Welsh Water	Vale Terrace 2 Storm Overflow	Sirhowy River	3	20 h 27m	-
Dwr Cymru Welsh Water	Merthyr Road A4048 Roundabout Storm Overflow	Sirhowy River	12	18 h 32m	-
Dwr Cymru Welsh Water	Pant Street Storm Overflow	River Rhymni	6	17 h 28m	-
Dwr Cymru Welsh Water	Beaufort Road Storm Overflow	Ebbw Fach River	13	16 h	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 1 Storm Overflow	Ebbw Fach River	2	13 h 29m	-
Dwr Cymru Welsh Water	Bargoed Old Colliery Washery Storm Overflow	River Rhymney	7	11 h 45m	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm Overflow	Ebbw River	4	9 h 27m	-
Dwr Cymru Welsh Water	Junction of Scwrfa Road and Mechanic Square Storm Overflow	River Sirhowy	5	8 h 30m	-
Dwr Cymru Welsh Water	Abertillery Glandwr Street Storm Overflow	River Ebbw	1	6 h 31m	-
Dwr Cymru Welsh Water	Heol Y Waun Storm Overflow	River Rhymney	4	6 h 12m	-
Dwr Cymru Welsh Water	Rassau Road Flyover Storm Overflow	Rasa Brook	4	5 h 54m	-
Dwr Cymru Welsh Water	Steelworks Road Ebbw Vale Storm Overflow	Ebbw Fawr	3	5 h 45m	-
Dwr Cymru Welsh Water	Tredegar Road Pennant Street Storm Overflow	Ebbw Fach River	2	4 h 53m	-
Dwr Cymru Welsh Water	Ebbw Vale Beaufort Rd Storm Overflow	River Ebbw	9	3 h 50m	-
Dwr Cymru Welsh Water	Victoria Business Park Storm Overflow	River Ebbw	2	3 h 30m	-
Dwr Cymru Welsh Water	Coedcae Rassau Storm Overflow	Nant Melyn	2	2 h 59m	-
Dwr Cymru Welsh Water	Allotment Road Storm Overflow	River Ebbw	2	2 h 44m	-
Dwr Cymru Welsh Water	Carno Street Storm Overflow	River Rhymney	3	2 h 14m	-
Dwr Cymru Welsh Water	Railway View Storm Overflow	River Sirhowy	4	2 h 11m	-
Dwr Cymru Welsh Water	River Road Cwm Storm Overflow	Ebbw Fach River	1	1 h 30m	-
Dwr Cymru Welsh Water	Basin Football Field Storm Overflow	River Rhymni	1	1 h	-
Dwr Cymru Welsh Water	Brooklyn Terrace Storm Overflow	River Ebbw	3	1 h	-
Dwr Cymru Welsh Water	Pengam Road Roundabout Aberbargoed Storm Overflow	Tributary of Afon Rhymni	2	0 h 59m	-
Dwr Cymru Welsh Water	Pontlottyn Recreation Ground Storm Overflow	River Rhymni	2	0 h 53m	-
Dwr Cymru Welsh Water	Alexandra Place Tredegar Storm Overflow	The Sirhowy River	2	0 h 30m	-
Dwr Cymru Welsh Water	Factory Road Field Storm Overflow	Nant Bargoed Rhymney	1	0 h 30m	-
Dwr Cymru Welsh Water	Crumlin Road Llanhilleth Storm Overflow	River Ebbw	2	0 h 28m	-
Dwr Cymru Welsh Water	Holland Street Ebbw Vale Overflow	River Ebbw	1	0 h 28m	-
Dwr Cymru Welsh Water	Morgan Street Tredegar Storm Overflow	Sirhowy River	1	0 h 14m	-
Dwr Cymru Welsh Water	Bryn Villas Storm Overflow	River Ebbw Fach	1	0 h 14m	-
Dwr Cymru Welsh Water	Bargoed Station Road Storm Overflow	River Rhymni	1	0 h 14m	-
Dwr Cymru Welsh Water	Brithdir Station Storm Overflow	River Rhymni	0	0 h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0 h	-
Dwr Cymru Welsh Water	Station Hill Abertillery Storm Overflow	River Tillery	0	0 h	-
Dwr Cymru Welsh Water	High Street West Abertillery Overflow	River Tillery	0	0 h	-
Dwr Cymru Welsh Water	Old School Site Nantyglo Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	School Street New Tredegar Overflow	River Rhymni	0	0 h	-
Dwr Cymru Welsh Water	Lamb's Square Lower Square Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Six Bells Road Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Excelsior Street Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Ladies Row Storm Overflow	Sirhowy River	0	0 h	-
Dwr Cymru Welsh Water	Market Road Nantyglo Storm Overflow	River Ebbw Fach	0	0 h	-
Dwr Cymru Welsh Water	Westville Rhymney Overflow	River Rhymni	0	0 h	-
Dwr Cymru Welsh Water	Vale Terrace 3 Storm Overflow	River Sirhowy	0	0 h	-
Dwr Cymru Welsh Water	Limestone Road Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Sannan Street Storm Overflow	River Rhymni	0	0 h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0 h	-
Dwr Cymru Welsh Water	Victoria Road Six Bells Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Harcourt Street Rear Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Beaufort Terrace Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Rose Hayworth Road Storm Overflow	River Ebbw Fach	0	0 h	-
Dwr Cymru Welsh Water	High Street Blaina Storm Overflow	Nant Yr Ystruth	0	0 h	-
Dwr Cymru Welsh Water	Llwyn Helyg Storm Overflow	Sirhowy River	0	0 h	-
Dwr Cymru Welsh Water	Marine Street and Dyffryn Place Junction Cwm Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	High Street Abertillery Storm Overflow	River Tillery	0	0 h	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm No.2 Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Lillian Grove Rear Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Tillery Street Storm Overflow	River Tyleri	0	0 h	-
Dwr Cymru Welsh Water	Augusta Park Ebbw Vale Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Badminton Grove Beaufort Road Storm Overflow	Ebbw Fawr	0	0 h	-
Dwr Cymru Welsh Water	Nantyglo Farm Road Junction of Market Road Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Tredegar Road Rees Street Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Canning Street Storm Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Tredegar East of Pochin Crescent and A4048 Roundabout Storm Overflow	River Sirhowy	0	0 h	-
Dwr Cymru Welsh Water	Fitzroy Avenue Roundabout Ebbw Vale Overflow	River Ebbw	0	0 h	-
Dwr Cymru Welsh Water	Queens Square Ebbw Vale Storm Overflow	Ebbw Fach River	0	0 h	-
Dwr Cymru Welsh Water	Vale Terrace 1 Storm Overflow	Sirhowy River	0	0 h	-

Company

Site Name

Receiving Waterway

Overflow Days

Total Duration (hours)

Offline/Potential Pollution

Dwr Cymru Welsh Water

Brynmawr Blackrock WwTW Storm Overflow

River Clydach

876 h

Dwr Cymru Welsh Water

Deri Riverside Walk Bargoed Storm Overflow