Top of the Poops | Constituency Sewage Map - 2025 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 for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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	104	1,367h 45m	-
Dwr Cymru Welsh Water	Abertysswg Troedrhiwfuwch Storm Overflow	River Rhymni	72	723h 6m	-
Dwr Cymru Welsh Water	Park Place Storm Overflow	River Sirhowy	123	670h 20m	-
Dwr Cymru Welsh Water	Beaufort Allotment Road Bridge Storm Overflow	River Ebbw	85	646h 52m	-
Dwr Cymru Welsh Water	Deri Riverside Walk Bargoed Storm Overflow	Nant Bargod Rhymni	57	594h 41m	-
Dwr Cymru Welsh Water	Bedwellty Road Bridge Storm Overflow	River Taff Bargoed	127	520h 53m	-
Dwr Cymru Welsh Water	New Tredegar Business Park West Storm Overflow	River Rhymni	30	329h 38m	-
Dwr Cymru Welsh Water	Pontlottyn Old Gasworks Storm Overflow	River Rhymni	52	250h	-
Dwr Cymru Welsh Water	The Square Street Abertillery Storm Overflow	River Ebbw	34	239h 5m	-
Dwr Cymru Welsh Water	Garibaldi Bridge Storm Overflow	River Sirhowy	59	237h 53m	-
Dwr Cymru Welsh Water	Marine Street Industrial Estate Storm Overflow	River Ebbw	38	230h 16m	-
Dwr Cymru Welsh Water	Victoria Business Park Storm Overflow	River Ebbw	19	199h 20m	-
Dwr Cymru Welsh Water	Commercial street near Sirhowy river Storm Overflow	Sirhowy River	58	192h 38m	-
Dwr Cymru Welsh Water	Tredegar Greenfield Ter Storm Overflow	Sirhowy River	53	185h 18m	-
Dwr Cymru Welsh Water	Dukestown road Tredegar Storm Overflow	Sirhowy River	44	175h 20m	-
Dwr Cymru Welsh Water	South of Pochin Crescent Storm Overflow	Sirhowy River	28	171h 51m	-
Dwr Cymru Welsh Water	Bargoed Viaduct Storm Overflow	River Rhymni	31	171h 33m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 2 Storm Overflow	Ebbw Fach River	20	170h 18m	-
Dwr Cymru Welsh Water	Rhymney Walk Storm Overflow	The River Rhymney	46	166h 7m	-
Dwr Cymru Welsh Water	The Terrace Rhymney Storm Overflow	River Rhymni	43	161h 55m	-
Dwr Cymru Welsh Water	Steelworks Road and Clos Pen Y Cae Storm Overflow	River Ebbw	47	149h 36m	-
Dwr Cymru Welsh Water	High Street Blaina Storm Overflow	Nant Yr Ystruth	43	148h 11m	-
Dwr Cymru Welsh Water	Vale Terrace 1 Storm Overflow	Sirhowy River	18	147h 15m	-
Dwr Cymru Welsh Water	Merthyr Road A4048 Roundabout Storm Overflow	Sirhowy River	33	128h 54m	-
Dwr Cymru Welsh Water	Heol Y Waun Storm Overflow	River Rhymney	31	127h 14m	-
Dwr Cymru Welsh Water	Berea Close Storm Overflow	Ebbw Fach River	30	125h 13m	-
Dwr Cymru Welsh Water	Vicarage Rd Rear of Hill Rest Tregerar Storm Overflow	River Sirhowy	42	115h 48m	-
Dwr Cymru Welsh Water	Bethania Cottages Storm Overflow	River Rhymni	38	108h 34m	-
Dwr Cymru Welsh Water	Factory Road Field Storm Overflow	Nant Bargoed Rhymney	10	99h 30m	-
Dwr Cymru Welsh Water	Carno Street Storm Overflow	River Rhymney	34	96h 34m	-
Dwr Cymru Welsh Water	Abertillery Six Bells Colliery No. 1 Storm Overflow	Ebbw Fach River	10	81h 42m	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm No.2 Overflow	River Ebbw	7	77h 42m	-
Dwr Cymru Welsh Water	Pontlottyn Recreation Ground Storm Overflow	River Rhymni	29	75h 49m	-
Dwr Cymru Welsh Water	Bargoed Old Colliery Washery Storm Overflow	River Rhymney	35	75h 33m	-
Dwr Cymru Welsh Water	Junction of Scwrfa Road and Mechanic Square Storm Overflow	River Sirhowy	27	72h 28m	-
Dwr Cymru Welsh Water	Beaufort Road Storm Overflow	Ebbw Fach River	33	71h 47m	-
Dwr Cymru Welsh Water	Aubrey Terrace Overflow	Ebbw River	24	66h 37m	-
Dwr Cymru Welsh Water	Rassau Road Flyover Storm Overflow	Rasa Brook	29	63h 53m	-
Dwr Cymru Welsh Water	Allotment Road Storm Overflow	River Ebbw	12	62h 41m	-
Dwr Cymru Welsh Water	Steelworks Road Ebbw Vale Storm Overflow	Ebbw Fawr	16	60h 55m	-
Dwr Cymru Welsh Water	Ebbw Vale Beaufort Rd Storm Overflow	River Ebbw	41	59h 32m	-
Dwr Cymru Welsh Water	Glan Ebbw Terrace Storm Overflow	River Tillery	17	57h 4m	-
Dwr Cymru Welsh Water	Pont-Y-Gof Storm Overflow	Ebbw River	28	56h 11m	-
Dwr Cymru Welsh Water	Railway View Storm Overflow	River Sirhowy	40	55h 20m	-
Dwr Cymru Welsh Water	Abertillery Tillery Street Storm Overflow	River Tillery	22	53h 17m	-
Dwr Cymru Welsh Water	Tredegar Road Pennant Street Storm Overflow	Ebbw Fach River	20	47h 6m	-
Dwr Cymru Welsh Water	Pengam Road Roundabout Aberbargoed Storm Overflow	Tributary of Afon Rhymni	22	46h 4m	-
Dwr Cymru Welsh Water	King Street Brynmawr Storm Overflow	Ebbw Fach River	26	40h 41m	-
Dwr Cymru Welsh Water	South Griffin Colliery Storm Overflow	Ebbw Fach River	11	38h 1m	-
Dwr Cymru Welsh Water	Morgan Street Tredegar Storm Overflow	Sirhowy River	27	37h 4m	-
Dwr Cymru Welsh Water	Basin Football Field Storm Overflow	River Rhymni	16	34h 12m	-
Dwr Cymru Welsh Water	Coedcae Rassau Storm Overflow	Nant Melyn	13	29h 47m	-
Dwr Cymru Welsh Water	Abertillery Glandwr Street Storm Overflow	River Ebbw	12	29h 31m	-
Dwr Cymru Welsh Water	Market Road Nantyglo Storm Overflow	River Ebbw Fach	6	29h 10m	-
Dwr Cymru Welsh Water	Vale Terrace 2 Storm Overflow	Sirhowy River	20	27h 25m	-
Dwr Cymru Welsh Water	Castle Street Abertillery Overflow	River Ebdw Fach	20	20h 36m	-
Dwr Cymru Welsh Water	Fitzroy Avenue Roundabout Ebbw Vale Overflow	River Ebbw	9	20h	-
Dwr Cymru Welsh Water	Bryn Villas Storm Overflow	River Ebbw Fach	8	19h 39m	-
Dwr Cymru Welsh Water	River Road Cwm Storm Overflow	Ebbw Fach River	9	18h 30m	-
Dwr Cymru Welsh Water	Tredegar East of Pochin Crescent and A4048 Roundabout Storm Overflow	River Sirhowy	5	18h 27m	-
Dwr Cymru Welsh Water	Holland Street Ebbw Vale Overflow	River Ebbw	16	11h 56m	-
Dwr Cymru Welsh Water	Old School Site Nantyglo Storm Overflow	Ebbw Fach River	6	8h 58m	-
Dwr Cymru Welsh Water	Augusta Park Ebbw Vale Storm Overflow	Ebbw Fach River	9	7h 45m	-
Dwr Cymru Welsh Water	Unknown	Unknown	21	7h 37m	-
Dwr Cymru Welsh Water	Chapel Road Six Bells Storm Overflow	River Ebbw Fach	8	7h 8m	-
Dwr Cymru Welsh Water	Unknown	Unknown	6	5h 57m	-
Dwr Cymru Welsh Water	Marine Street and Dyffryn Place Junction Cwm Storm Overflow	River Ebbw	4	5h 43m	-
Dwr Cymru Welsh Water	Ladies Row Storm Overflow	Sirhowy River	6	4h 38m	-
Dwr Cymru Welsh Water	Limestone Road Storm Overflow	Ebbw Fach River	4	3h 32m	-
Dwr Cymru Welsh Water	Brithdir Station Storm Overflow	River Rhymni	2	3h 15m	-
Dwr Cymru Welsh Water	Bargoed Station Road Storm Overflow	River Rhymni	4	3h 9m	-
Dwr Cymru Welsh Water	Excelsior Street Storm Overflow	River Ebbw	3	2h 43m	-
Dwr Cymru Welsh Water	Brooklyn Terrace Storm Overflow	River Ebbw	5	2h 43m	-
Dwr Cymru Welsh Water	Commercial Road Abertillery Storm Overflow	River Ebbw	4	2h 14m	-
Dwr Cymru Welsh Water	Beaufort Terrace Storm Overflow	River Ebbw	2	1h 58m	-
Dwr Cymru Welsh Water	Pant Street Storm Overflow	River Rhymni	4	1h 30m	-
Dwr Cymru Welsh Water	Victoria Road Six Bells Storm Overflow	Ebbw Fach River	1	1h 13m	-
Dwr Cymru Welsh Water	Tredegar Road Rees Street Storm Overflow	Ebbw Fach River	2	1h 12m	-
Dwr Cymru Welsh Water	Alexandra Place Tredegar Storm Overflow	The Sirhowy River	3	0h 43m	-
Dwr Cymru Welsh Water	Lillian Grove Rear Storm Overflow	Ebbw Fach River	2	0h 38m	-
Dwr Cymru Welsh Water	High Street West Abertillery Overflow	River Tillery	2	0h 29m	-
Dwr Cymru Welsh Water	Canning Street Storm Overflow	River Ebbw	1	0h 15m	-
Dwr Cymru Welsh Water	Crumlin Road Llanhilleth Storm Overflow	River Ebbw	1	0h 15m	-
Dwr Cymru Welsh Water	Vale Terrace 3 Storm Overflow	River Sirhowy	1	0h 15m	-
Dwr Cymru Welsh Water	Badminton Grove Beaufort Road Storm Overflow	Ebbw Fawr	1	0h 15m	-
Dwr Cymru Welsh Water	Station Hill Abertillery Storm Overflow	River Tillery	1	0h 15m	-
Dwr Cymru Welsh Water	Queens Square Ebbw Vale Storm Overflow	Ebbw Fach River	1	0h 15m	-
Dwr Cymru Welsh Water	School Street New Tredegar Overflow	River Rhymni	1	0h 14m	-
Dwr Cymru Welsh Water	Six Bells Road Storm Overflow	Ebbw Fach River	1	0h 14m	-
Dwr Cymru Welsh Water	Llwyn Helyg Storm Overflow	Sirhowy River	0	0h	-
Dwr Cymru Welsh Water	Tillery Street Storm Overflow	River Tyleri	0	0h	-
Dwr Cymru Welsh Water	Rose Hayworth Road Storm Overflow	River Ebbw Fach	0	0h	-
Dwr Cymru Welsh Water	Lamb's Square 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	Westville Rhymney Overflow	River Rhymni	0	0h	-
Dwr Cymru Welsh Water	Nantyglo Farm Road Junction of Market Road Storm Overflow	Ebbw Fach River	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	Lower Square Storm Overflow	River Ebbw	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

104

1,367h 45m

Dwr Cymru Welsh Water