Top of the Poops | Constituency | Merthyr Tydfil and Rhymney| Polluted by Dwr Cymru Welsh Water

Select the constituency from the drop-down

Constituency

✔ means we have experimental daily data since 2023

Totals for Merthyr Tydfil and Rhymney in 2023

38 Sites polluted by Dwr Cymru Welsh Water

1,909 sewage dumps
9,281 h duration

That's 1.07 years! On average 5.2 times a day

Change Over Time

Take Action

Your local MP is Gerald Jones (Labour) - Find out more about their interests, donors, and voting at They Work For You

Constituencies near Merthyr Tydfil and Rhymney

Waterways in Merthyr Tydfil and Rhymney

Pollution Summary 2023

Here are all the reported sewage overflow totals for Merthyr Tydfil and Rhymney in 2023. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 1 of the total 41 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Rhymney R - Source To Conf Nant Bargod Rhymni	Pontlottyn Newydd Farm CSO	100	905	98.9
Dwr Cymru Welsh Water	Nant Bargoed	Deri, Darran Valley CSO	83	853	100
Dwr Cymru Welsh Water	Taf Fechan	PONTSTICILL WWTW	78	829	100
Dwr Cymru Welsh Water	River Rhymney	Abertysswg Rugby Playing Field CSO	110	779	98.5
Dwr Cymru Welsh Water	Taff Bargoed	CSO at Bedlinog- Bowling Green	99	759	98.9
Dwr Cymru Welsh Water	Morlais Brook	A CSO AT WATERLOO HOUSE MERTHYR	132	752	97.2
Dwr Cymru Welsh Water	River Rhymney	CSO Nr Bethania Cottages	85	606	99.4
Dwr Cymru Welsh Water	Pandy Brook	TRELEWIS CSO - REAR OF GLYNBARGOED	125	481	95.9
Dwr Cymru Welsh Water	Morlais Brook	CSO at The Bont, Merthyr Tydfil	105	430	98.4
Dwr Cymru Welsh Water	Taff	CSO PONT RHUN MERTHYR TYDFIL	68	421	100
Dwr Cymru Welsh Water	River Rhymney	CSO NEAR RHYMNEY STATION	87	378	98.7
Dwr Cymru Welsh Water	River Taff	A CSO AT JACKSONS BRIDGE	99	343	100
Dwr Cymru Welsh Water	Pentrebach Brook	Dixs Field CSO, Pentrebach, Merthyr	88	261	97.8
Dwr Cymru Welsh Water	River Taff	Gellideg Tai Mawr Rd CSO, Merthyr Tydfil	58	212	99.2
Dwr Cymru Welsh Water	River Taff	CSO COLLEGE CAR PK MERTHYR TYDFIL	56	197	100
Dwr Cymru Welsh Water	Nant Morlais	Rocky Rd CSO Merthyr Tydfil	70	128	96.5
Dwr Cymru Welsh Water	River Rhymney	CSO At New Tredegar Adj Rhosyn Gwyn	18	127	53.5
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Fiddlers Elbow St, Cynon	41	124	99
Dwr Cymru Welsh Water	River Rhymney	CSO AT REAR OF MEMORIAL HOSPITAL	47	120	99.2
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Greenfield Victoria Bridge	22	103	40.6
Dwr Cymru Welsh Water	River Rhymney	Rhymney Carno St Bute House CSO	50	97	97.3
Dwr Cymru Welsh Water	River Rhymney	A CSO AT PONTLOTTYN	16	93	99.8
Dwr Cymru Welsh Water	Morlais Brook	CSO TREVITHICK MONUMENT MERTHYR	40	76	29.5
Dwr Cymru Welsh Water	Rhymney R - Source To Conf Nant Bargod Rhymni	Pontlottyn Recreation Ground CSO	39	65	99.4
Dwr Cymru Welsh Water	River Taff	CSO Avenue De Clichy, Merthyr	27	38	100
Dwr Cymru Welsh Water	Taf Fechan	High St CSO, Cefn Coed	36	25	88.2
Dwr Cymru Welsh Water	River Taff	Phyllis Street CSO, Troedyrhiw	34	16	92.9
Dwr Cymru Welsh Water	River Taff	Merthyr Tydfil Georgetown Lines Bridge CSO	29	15	99.9
Dwr Cymru Welsh Water	Goitre Brook	Goitre Lane CSO	18	14	99.2
Dwr Cymru Welsh Water	Morlais Brook	Brewers Arms CSO, Balaclava Rd, Dowlais	18	7	94.2
Dwr Cymru Welsh Water	River Taff	Troedyrhiw, Yew Street CSO	5	6	83.1
Dwr Cymru Welsh Water	River Taff	TROEDYRHIW PS	4	4	98.5
Dwr Cymru Welsh Water	Un Leading To Nant Morlais	Dowlais Market St & High St Junction	12	3	59.5
Dwr Cymru Welsh Water	River Rhymney	A CSO AT BIRTHDIR NEAR STATION	3	0	100
Dwr Cymru Welsh Water	Morlais Brook	CSO AT DOWLAIS BALACLAVA ROAD	3	0	100
Dwr Cymru Welsh Water	River Taff	3rd Trunk CSO South of Glan Yr Afon	2	0	100
Dwr Cymru Welsh Water	Bargoed Taf	CSO at QUAKERS YARD - NEAR PUBLIC HOU	1	0	99.3
Dwr Cymru Welsh Water	Rhymney River	New Tredegar Birch Grove	1	0	60.6
Dwr Cymru Welsh Water	Morlais Brook	Balaclava Rd CSO, Dowlais	0	0	100
Dwr Cymru Welsh Water	River Taff	CSO WILLOW GAS WORKS MERTHYR TYDFIL	0	0	0
Dwr Cymru Welsh Water	River Taff	TRUNK CSO 2A OFF ABERFAN ROAD	0	0	100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

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:

Media Queries

Get in touch if you have queries or want to discuss our data.

press [at] top-of-the-poops.org

Please Support Us

We rely on donations to fund our work. Please support us if you can

Merthyr Tydfil and Rhymney was polluted by sewage 1,909 times in 2023 lasting 9,281 hours - that's 1.07 years! - but monitoring was disabled in some locations, so could be more

38 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2023

Data Sources & Accuracy

Media Queries

Please Support Us

Merthyr Tydfil and Rhymney was polluted by sewage 1,909 times in 2023
lasting 9,281 hours - that's 1.07 years!
- but monitoring was disabled in some locations, so could be more