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.

Totals for Blaenau Gwent and Rhymney in 2026

Sewage6,953 hours

Monitoring offline0 hours

Potential pollution0 hours

Storm overflows99

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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	141	2,053h 5m	-
Dwr Cymru Welsh Water	Deri Riverside Walk Bargoed Storm Overflow	Nant Bargod Rhymni	50	473h 10m	-
Dwr Cymru Welsh Water	Beaufort Allotment Road Bridge Storm Overflow	River Ebbw	64	430h 42m	-
Dwr Cymru Welsh Water	Bedwellty Road Bridge Storm Overflow	River Taff Bargoed	76	415h 35m	-
Dwr Cymru Welsh Water	The Square Street Abertillery Storm Overflow	River Ebbw	31	323h 30m	-
Dwr Cymru Welsh Water	Abertysswg Troedrhiwfuwch Storm Overflow	River Rhymni	42	303h 8m	-
Dwr Cymru Welsh Water	Steelworks Road and Clos Pen Y Cae Storm Overflow	River Ebbw	49	294h 45m	-
Dwr Cymru Welsh Water	Berea Close Storm Overflow	Ebbw Fach River	21	256h 35m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 2 Storm Overflow	Ebbw Fach River	19	182h 20m	-
Dwr Cymru Welsh Water	Pontlottyn Old Gasworks Storm Overflow	River Rhymni	38	157h 14m	-
Dwr Cymru Welsh Water	Marine Street Industrial Estate Storm Overflow	River Ebbw	30	149h 31m	-
Dwr Cymru Welsh Water	Commercial Road Abertillery Storm Overflow	River Ebbw	21	131h 24m	-
Dwr Cymru Welsh Water	Garibaldi Bridge Storm Overflow	River Sirhowy	43	128h 12m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 1 Storm Overflow	Ebbw Fach River	19	114h 39m	-
Dwr Cymru Welsh Water	Dukestown road Tredegar Storm Overflow	Sirhowy River	31	105h 44m	-
Dwr Cymru Welsh Water	Aubrey Terrace Overflow	Ebbw River	27	97h 49m	-
Dwr Cymru Welsh Water	Bargoed Viaduct Storm Overflow	River Rhymni	22	95h 37m	-
Dwr Cymru Welsh Water	Commercial street near Sirhowy river Storm Overflow	Sirhowy River	32	95h 25m	-
Dwr Cymru Welsh Water	New Tredegar Business Park West Storm Overflow	River Rhymni	12	89h 43m	-
Dwr Cymru Welsh Water	Rhymney Walk Storm Overflow	The River Rhymney	24	80h 53m	-
Dwr Cymru Welsh Water	Castle Street Abertillery Overflow	River Ebdw Fach	27	79h 24m	-
Dwr Cymru Welsh Water	Glan Ebbw Terrace Storm Overflow	River Tillery	11	64h	-
Dwr Cymru Welsh Water	Bethania Cottages Storm Overflow	River Rhymni	29	62h 39m	-
Dwr Cymru Welsh Water	Park Place Storm Overflow	River Sirhowy	25	58h 36m	-
Dwr Cymru Welsh Water	Tredegar Greenfield Ter Storm Overflow	Sirhowy River	23	52h 52m	-
Dwr Cymru Welsh Water	Vicarage Rd Rear of Hill Rest Tregerar Storm Overflow	River Sirhowy	24	51h 34m	-
Dwr Cymru Welsh Water	South of Pochin Crescent Storm Overflow	Sirhowy River	15	47h 53m	-
Dwr Cymru Welsh Water	Abertillery Tillery Street Storm Overflow	River Tillery	17	43h 52m	-
Dwr Cymru Welsh Water	Beaufort Road Storm Overflow	Ebbw Fach River	22	35h 31m	-
Dwr Cymru Welsh Water	The Terrace Rhymney Storm Overflow	River Rhymni	15	33h 3m	-
Dwr Cymru Welsh Water	South Griffin Colliery Storm Overflow	Ebbw Fach River	19	31h 38m	-
Dwr Cymru Welsh Water	Bargoed Old Colliery Washery Storm Overflow	River Rhymney	20	29h 39m	-
Dwr Cymru Welsh Water	Chapel Road Six Bells Storm Overflow	River Ebbw Fach	14	28h 21m	-
Dwr Cymru Welsh Water	Junction of Scwrfa Road and Mechanic Square Storm Overflow	River Sirhowy	13	28h 11m	-
Dwr Cymru Welsh Water	King Street Brynmawr Storm Overflow	Ebbw Fach River	14	27h 55m	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm Overflow	Ebbw River	13	25h 47m	-
Dwr Cymru Welsh Water	Heol Y Waun Storm Overflow	River Rhymney	9	25h 40m	-
Dwr Cymru Welsh Water	Vale Terrace 1 Storm Overflow	Sirhowy River	3	24h 36m	-
Dwr Cymru Welsh Water	Vale Terrace 2 Storm Overflow	Sirhowy River	5	23h 41m	-
Dwr Cymru Welsh Water	Carno Street Storm Overflow	River Rhymney	8	19h 28m	-
Dwr Cymru Welsh Water	Merthyr Road A4048 Roundabout Storm Overflow	Sirhowy River	13	18h 59m	-
Dwr Cymru Welsh Water	Tredegar Road Pennant Street Storm Overflow	Ebbw Fach River	5	18h 52m	-
Dwr Cymru Welsh Water	Pant Street Storm Overflow	River Rhymni	6	17h 28m	-
Dwr Cymru Welsh Water	Steelworks Road Ebbw Vale Storm Overflow	Ebbw Fawr	7	16h 30m	-
Dwr Cymru Welsh Water	Pontlottyn Recreation Ground Storm Overflow	River Rhymni	7	15h 34m	-
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	9	10h 25m	-
Dwr Cymru Welsh Water	High Street Blaina Storm Overflow	Nant Yr Ystruth	4	8h 49m	-
Dwr Cymru Welsh Water	Factory Road Field Storm Overflow	Nant Bargoed Rhymney	3	6h 44m	-
Dwr Cymru Welsh Water	Railway View Storm Overflow	River Sirhowy	8	6h 3m	-
Dwr Cymru Welsh Water	Rassau Road Flyover Storm Overflow	Rasa Brook	4	5h 54m	-
Dwr Cymru Welsh Water	Morgan Street Tredegar Storm Overflow	Sirhowy River	5	5h 29m	-
Dwr Cymru Welsh Water	Allotment Road Storm Overflow	River Ebbw	3	4h 44m	-
Dwr Cymru Welsh Water	Coedcae Rassau Storm Overflow	Nant Melyn	4	4h 29m	-
Dwr Cymru Welsh Water	Ebbw Vale Beaufort Rd Storm Overflow	River Ebbw	10	4h 5m	-
Dwr Cymru Welsh Water	Victoria Business Park Storm Overflow	River Ebbw	3	3h 56m	-
Dwr Cymru Welsh Water	River Road Cwm Storm Overflow	Ebbw Fach River	2	2h 30m	-
Dwr Cymru Welsh Water	Crumlin Road Llanhilleth Storm Overflow	River Ebbw	8	2h 13m	-
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	3	1h 56m	-
Dwr Cymru Welsh Water	Alexandra Place Tredegar Storm Overflow	The Sirhowy River	5	1h 45m	-
Dwr Cymru Welsh Water	Ladies Row Storm Overflow	Sirhowy River	3	1h 42m	-
Dwr Cymru Welsh Water	Basin Football Field Storm Overflow	River Rhymni	2	1h 27m	-
Dwr Cymru Welsh Water	Brooklyn Terrace Storm Overflow	River Ebbw	4	1h 15m	-
Dwr Cymru Welsh Water	Tillery Street Storm Overflow	River Tyleri	2	1h 9m	-
Dwr Cymru Welsh Water	Bargoed Station Road Storm Overflow	River Rhymni	2	0h 59m	-
Dwr Cymru Welsh Water	Lower Square Storm Overflow	River Ebbw	1	0h 59m	-
Dwr Cymru Welsh Water	Tredegar Road Rees Street Storm Overflow	Ebbw Fach River	1	0h 29m	-
Dwr Cymru Welsh Water	Fitzroy Avenue Roundabout Ebbw Vale Overflow	River Ebbw	1	0h 15m	-
Dwr Cymru Welsh Water	School Street New Tredegar Overflow	River Rhymni	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	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	Rose Hayworth Road Storm Overflow	River Ebbw Fach	0	0h	-
Dwr Cymru Welsh Water	Canning Street Storm Overflow	River Ebbw	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	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Victoria Road Six Bells Storm Overflow	Ebbw Fach River	0	0h	-
Dwr Cymru Welsh Water	High Street Abertillery Storm Overflow	River Tillery	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	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	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	Nantyglo Farm Road Junction of Market Road Storm Overflow	Ebbw Fach River	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	High Street West Abertillery Overflow	River Tillery	0	0h	-
Dwr Cymru Welsh Water	Brithdir Station Storm Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Sannan Street Storm Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Harcourt Street Rear Storm Overflow	River Ebbw	0	0h	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm No.2 Overflow	River Ebbw	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

141

2,053h 5m

Dwr Cymru Welsh Water