Top of the Poops | Constituency | Merthyr Tydfil and Rhymney

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✔ means we have experimental daily data for 2023

Totals for Merthyr Tydfil and Rhymney in 2022

36 Sites polluted by Dwr Cymru Welsh Water

1,698 sewage dumps
8,434 h duration

That's 11.71 months. On average 4.7 times a day

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Constituencies near Merthyr Tydfil and Rhymney

Waterways in Merthyr Tydfil and Rhymney

Pollution Summary 2022

Here are all the reported sewage overflow totals for Merthyr Tydfil and Rhymney in 2022. Sometimes sewage can be being dumped for months at a time.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Taf Fechan	PONTSTICILL WWTW	96	1,994	100
Dwr Cymru Welsh Water	River Taff	Gellideg Tai Mawr Rd CSO, Merthyr Tydfil	79	777	99.3
Dwr Cymru Welsh Water	River Rhymney	Abertysswg Rugby Playing Field CSO	89	609	99
Dwr Cymru Welsh Water	Taff Bargoed	CSO at Bedlinog- Bowling Green	83	585	99.1
Dwr Cymru Welsh Water	Morlais Brook	A CSO AT WATERLOO HOUSE MERTHYR	110	582	97.3
Dwr Cymru Welsh Water	Nant Bargoed	Deri, Darran Valley CSO	61	500	100
Dwr Cymru Welsh Water	River Rhymney	CSO Nr Bethania Cottages	82	474	99.4
Dwr Cymru Welsh Water	Pandy Brook	TRELEWIS CSO - REAR OF GLYNBARGOED	114	428	97.2
Dwr Cymru Welsh Water	Morlais Brook	CSO at The Bont, Merthyr Tydfil	91	316	96.6
Dwr Cymru Welsh Water	River Rhymney	CSO NEAR RHYMNEY STATION	75	294	99.1
Dwr Cymru Welsh Water	River Taff	A CSO AT JACKSONS BRIDGE	89	292	99.4
Dwr Cymru Welsh Water	River Rhymney	CSO At New Tredegar Adj Rhosyn Gwyn	32	272	100
Dwr Cymru Welsh Water	Pentrebach Brook	Dixs Field CSO, Pentrebach, Merthyr	69	190	95.2
Dwr Cymru Welsh Water	River Taff	CSO COLLEGE CAR PK MERTHYR TYDFIL	46	142	100
Dwr Cymru Welsh Water	River Rhymney	Rhymney Carno St Bute House CSO	64	130	93.3
Dwr Cymru Welsh Water	Nant Morlais	Rocky Rd CSO Merthyr Tydfil	62	109	99.4
Dwr Cymru Welsh Water	River Rhymney	CSO AT REAR OF MEMORIAL HOSPITAL	43	109	98.7
Dwr Cymru Welsh Water	Morlais Brook	CSO TREVITHICK MONUMENT MERTHYR	64	107	96.1
Dwr Cymru Welsh Water	Rhymney R - Source To Conf Nant Bargod Rhymni	Pontlottyn Newydd Farm CSO	41	99	99.8
Dwr Cymru Welsh Water	Taff	CSO PONT RHUN MERTHYR TYDFIL	36	96	100
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Greenfield Victoria Bridge	22	61	80.2
Dwr Cymru Welsh Water	Rhymney R - Source To Conf Nant Bargod Rhymni	Pontlottyn Recreation Ground CSO	40	57	99.6
Dwr Cymru Welsh Water	River Taff	Merthyr Tydfil Georgetown Lines Bridge CSO	50	57	99.8
Dwr Cymru Welsh Water	River Rhymney	A CSO AT PONTLOTTYN	23	53	96.1
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Fiddlers Elbow St, Cynon	15	34	16.5
Dwr Cymru Welsh Water	River Taff	CSO Avenue De Clichy, Merthyr	25	19	100
Dwr Cymru Welsh Water	Taf Fechan	High St CSO, Cefn Coed	37	18	99.8
Dwr Cymru Welsh Water	Goitre Brook	Goitre Lane CSO	17	7	99.5
Dwr Cymru Welsh Water	Morlais Brook	Brewers Arms CSO, Balaclava Rd, Dowlais	18	5	100
Dwr Cymru Welsh Water	River Taff	Troedyrhiw, Yew Street CSO	7	2	99.6
Dwr Cymru Welsh Water	River Taff	3rd Trunk CSO South of Glan Yr Afon	6	1	100
Dwr Cymru Welsh Water	River Taff	Phyllis Street CSO, Troedyrhiw	3	0	100
Dwr Cymru Welsh Water	River Rhymney	A CSO AT BIRTHDIR NEAR STATION	3	0	100
Dwr Cymru Welsh Water	River Taff	TROEDYRHIW PS	3	0	98.5
Dwr Cymru Welsh Water	Un Leading To Nant Morlais	Dowlais Market St & High St Junction	2	0	99.7
Dwr Cymru Welsh Water	Rhymney River	New Tredegar Birch Grove	1	0	41.8
Dwr Cymru Welsh Water	River Taff	TRUNK CSO 2A OFF ABERFAN ROAD	0	0	15.8
Dwr Cymru Welsh Water	Bargoed Taf	CSO at QUAKERS YARD - NEAR PUBLIC HOU	0	0	100
Dwr Cymru Welsh Water	Morlais Brook	Balaclava Rd CSO, Dowlais	0	0	100
Dwr Cymru Welsh Water	Morlais Brook	CSO AT DOWLAIS BALACLAVA ROAD	0	0	97.2
Dwr Cymru Welsh Water	River Taff	CSO WILLOW GAS WORKS MERTHYR TYDFIL	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

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.

Analysing sewage pollution by the Water Industry

With generous support from:

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Merthyr Tydfil and Rhymney polluted by sewage 1,698 times in 2022 - lasting 8,434 hours

36 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2022

Data Sources & Accuracy

Media Queries

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