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	106	1,792h 15m	-
Dwr Cymru Welsh Water	Deri Riverside Walk Bargoed Storm Overflow	Nant Bargod Rhymni	44	458h 30m	-
Dwr Cymru Welsh Water	Bedwellty Road Bridge Storm Overflow	River Taff Bargoed	73	401h 10m	-
Dwr Cymru Welsh Water	Beaufort Allotment Road Bridge Storm Overflow	River Ebbw	43	349h 15m	-
Dwr Cymru Welsh Water	Steelworks Road and Clos Pen Y Cae Storm Overflow	River Ebbw	45	283h 45m	-
Dwr Cymru Welsh Water	The Square Street Abertillery Storm Overflow	River Ebbw	24	282h 7m	-
Dwr Cymru Welsh Water	Abertysswg Troedrhiwfuwch Storm Overflow	River Rhymni	33	276h 5m	-
Dwr Cymru Welsh Water	Berea Close Storm Overflow	Ebbw Fach River	19	253h 35m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 2 Storm Overflow	Ebbw Fach River	18	175h 5m	-
Dwr Cymru Welsh Water	Marine Street Industrial Estate Storm Overflow	River Ebbw	23	131h 51m	-
Dwr Cymru Welsh Water	Commercial Road Abertillery Storm Overflow	River Ebbw	20	129h 55m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 1 Storm Overflow	Ebbw Fach River	18	113h 12m	-
Dwr Cymru Welsh Water	Pontlottyn Old Gasworks Storm Overflow	River Rhymni	20	103h 15m	-
Dwr Cymru Welsh Water	Garibaldi Bridge Storm Overflow	River Sirhowy	27	96h 30m	-
Dwr Cymru Welsh Water	Bargoed Viaduct Storm Overflow	River Rhymni	22	96h 21m	-
Dwr Cymru Welsh Water	Aubrey Terrace Overflow	Ebbw River	20	85h 4m	-
Dwr Cymru Welsh Water	Dukestown road Tredegar Storm Overflow	Sirhowy River	20	85h	-
Dwr Cymru Welsh Water	Castle Street Abertillery Overflow	River Ebdw Fach	27	79h 24m	-
Dwr Cymru Welsh Water	Commercial street near Sirhowy river Storm Overflow	Sirhowy River	22	77h 30m	-
Dwr Cymru Welsh Water	Rhymney Walk Storm Overflow	The River Rhymney	19	76h 5m	-
Dwr Cymru Welsh Water	New Tredegar Business Park West Storm Overflow	River Rhymni	9	74h 44m	-
Dwr Cymru Welsh Water	Glan Ebbw Terrace Storm Overflow	River Tillery	9	62h 16m	-
Dwr Cymru Welsh Water	Tredegar Greenfield Ter Storm Overflow	Sirhowy River	20	50h 10m	-
Dwr Cymru Welsh Water	Park Place Storm Overflow	River Sirhowy	16	47h 53m	-
Dwr Cymru Welsh Water	Abertillery Tillery Street Storm Overflow	River Tillery	16	43h 8m	-
Dwr Cymru Welsh Water	Bethania Cottages Storm Overflow	River Rhymni	17	42h 23m	-
Dwr Cymru Welsh Water	South of Pochin Crescent Storm Overflow	Sirhowy River	9	38h 40m	-
Dwr Cymru Welsh Water	Vicarage Rd Rear of Hill Rest Tregerar Storm Overflow	River Sirhowy	17	37h 42m	-
Dwr Cymru Welsh Water	South Griffin Colliery Storm Overflow	Ebbw Fach River	18	30h 9m	-
Dwr Cymru Welsh Water	The Terrace Rhymney Storm Overflow	River Rhymni	11	28h 6m	-
Dwr Cymru Welsh Water	Chapel Road Six Bells Storm Overflow	River Ebbw Fach	14	27h 39m	-
Dwr Cymru Welsh Water	Beaufort Road Storm Overflow	Ebbw Fach River	16	22h 45m	-
Dwr Cymru Welsh Water	King Street Brynmawr Storm Overflow	Ebbw Fach River	9	22h 11m	-
Dwr Cymru Welsh Water	Vale Terrace 2 Storm Overflow	Sirhowy River	4	21h 57m	-
Dwr Cymru Welsh Water	Merthyr Road A4048 Roundabout Storm Overflow	Sirhowy River	13	18h 59m	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm Overflow	Ebbw River	11	18h 35m	-
Dwr Cymru Welsh Water	Tredegar Road Pennant Street Storm Overflow	Ebbw Fach River	4	18h 23m	-
Dwr Cymru Welsh Water	Bargoed Old Colliery Washery Storm Overflow	River Rhymney	11	17h 45m	-
Dwr Cymru Welsh Water	Pant Street Storm Overflow	River Rhymni	6	17h 28m	-
Dwr Cymru Welsh Water	Junction of Scwrfa Road and Mechanic Square Storm Overflow	River Sirhowy	7	16h 30m	-
Dwr Cymru Welsh Water	Heol Y Waun Storm Overflow	River Rhymney	6	16h 27m	-
Dwr Cymru Welsh Water	Carno Street Storm Overflow	River Rhymney	5	15h 14m	-
Dwr Cymru Welsh Water	Pontlottyn Recreation Ground Storm Overflow	River Rhymni	4	12h 38m	-
Dwr Cymru Welsh Water	Abertillery Glandwr Street Storm Overflow	River Ebbw	2	11h 30m	-
Dwr Cymru Welsh Water	Pengam Road Roundabout Aberbargoed Storm Overflow	Tributary of Afon Rhymni	5	7h 13m	-
Dwr Cymru Welsh Water	Rassau Road Flyover Storm Overflow	Rasa Brook	4	5h 54m	-
Dwr Cymru Welsh Water	Steelworks Road Ebbw Vale Storm Overflow	Ebbw Fawr	3	5h 45m	-
Dwr Cymru Welsh Water	Allotment Road Storm Overflow	River Ebbw	3	4h 44m	-
Dwr Cymru Welsh Water	Coedcae Rassau Storm Overflow	Nant Melyn	3	4h 14m	-
Dwr Cymru Welsh Water	Ebbw Vale Beaufort Rd Storm Overflow	River Ebbw	10	4h 5m	-
Dwr Cymru Welsh Water	Morgan Street Tredegar Storm Overflow	Sirhowy River	3	3h 59m	-
Dwr Cymru Welsh Water	Victoria Business Park Storm Overflow	River Ebbw	3	3h 56m	-
Dwr Cymru Welsh Water	Railway View Storm Overflow	River Sirhowy	5	2h 38m	-
Dwr Cymru Welsh Water	River Road Cwm Storm Overflow	Ebbw Fach River	2	2h 30m	-
Dwr Cymru Welsh Water	Marine Street and Dyffryn Place Junction Cwm Storm Overflow	River Ebbw	1	1h 59m	-
Dwr Cymru Welsh Water	Bryn Villas Storm Overflow	River Ebbw Fach	2	1h 58m	-
Dwr Cymru Welsh Water	Holland Street Ebbw Vale Overflow	River Ebbw	2	1h 41m	-
Dwr Cymru Welsh Water	Brooklyn Terrace Storm Overflow	River Ebbw	4	1h 15m	-
Dwr Cymru Welsh Water	Factory Road Field Storm Overflow	Nant Bargoed Rhymney	2	1h 15m	-
Dwr Cymru Welsh Water	Tillery Street Storm Overflow	River Tyleri	2	1h 9m	-
Dwr Cymru Welsh Water	Alexandra Place Tredegar Storm Overflow	The Sirhowy River	4	1h 1m	-
Dwr Cymru Welsh Water	Basin Football Field Storm Overflow	River Rhymni	1	1h	-
Dwr Cymru Welsh Water	Crumlin Road Llanhilleth Storm Overflow	River Ebbw	3	0h 43m	-
Dwr Cymru Welsh Water	Ladies Row Storm Overflow	Sirhowy River	1	0h 28m	-
Dwr Cymru Welsh Water	Tredegar Road Rees Street Storm Overflow	Ebbw Fach River	1	0h 15m	-
Dwr Cymru Welsh Water	Bargoed Station Road Storm Overflow	River Rhymni	1	0h 14m	-
Dwr Cymru Welsh Water	Station Hill Abertillery Storm Overflow	River Tillery	0	0h	-
Dwr Cymru Welsh Water	Old School Site Nantyglo Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	School Street New Tredegar Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Excelsior Street Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Westville Rhymney Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Limestone Road Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Beaufort Terrace Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Llwyn Helyg Storm Overflow	Sirhowy River	0	0h	-
Dwr Cymru Welsh Water	Nantyglo Farm Road Junction of Market Road Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Market Road Nantyglo Storm Overflow	River Ebbw Fach	0	0h	-
Dwr Cymru Welsh Water	Vale Terrace 3 Storm Overflow	River Sirhowy	0	0h	-
Dwr Cymru Welsh Water	Augusta Park Ebbw Vale Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Tredegar East of Pochin Crescent and A4048 Roundabout Storm Overflow	River Sirhowy	0	0h	-
Dwr Cymru Welsh Water	Fitzroy Avenue Roundabout Ebbw Vale Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	High Street West Abertillery Overflow	River Tillery	0	0h	-
Dwr Cymru Welsh Water	Rose Hayworth Road Storm Overflow	River Ebbw Fach	0	0h	-
Dwr Cymru Welsh Water	High Street Blaina Storm Overflow	Nant Yr Ystruth	0	0h	-
Dwr Cymru Welsh Water	Canning Street Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Vale Terrace 1 Storm Overflow	Sirhowy River	0	0h	-
Dwr Cymru Welsh Water	Brithdir Station Storm Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Lamb's Square Lower Square Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Six Bells Road Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Sannan Street Storm Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Victoria Road Six Bells Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Harcourt Street Rear Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Lower Square Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	High Street Abertillery Storm Overflow	River Tillery	0	0h	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm No.2 Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Lillian Grove Rear Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	Badminton Grove Beaufort Road Storm Overflow	Ebbw Fawr	0	0h	-
Dwr Cymru Welsh Water	Queens Square Ebbw Vale Storm Overflow	Ebbw Fach River	0	0h	-

Company

Site Name

Receiving Waterway

Overflow Days

Total Duration (hours)

Offline/Potential Pollution

Dwr Cymru Welsh Water

Brynmawr Blackrock WwTW Storm Overflow

River Clydach

106

1,792h 15m

Dwr Cymru Welsh Water