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

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Constituency

✔ means we have experimental daily data since 2023

Totals for Merthyr Tydfil and Aberdare in 2023

68 Sites polluted by Dwr Cymru Welsh Water

3,015 sewage dumps
15,316 h duration

That's 1.77 years! On average 8.3 times a day

Change Over Time

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Constituencies near Merthyr Tydfil and Aberdare

Waterways in Merthyr Tydfil and Aberdare

Pollution Summary 2023

Here are all the reported sewage overflow totals for Merthyr Tydfil and Aberdare 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 2 of the total 76 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Cynon	MIKES FIELD CSO ABERAMAN	135	2,042	99.9
Dwr Cymru Welsh Water	River Cynon	CSO Opposite Arthurs Place Trecynon	143	1,726	99.9
Dwr Cymru Welsh Water	River Cynon	CSO ABERAMAN IND EST ABERAMAN	61	989	85.8
Dwr Cymru Welsh Water	River Cynon	Penderyn CSO - Tank In Field Raked Scre	127	949	96.3
Dwr Cymru Welsh Water	River Cynon	CSO At Bottom Monk Street	121	933	100
Dwr Cymru Welsh Water	Taf Fechan	PONTSTICILL WWTW	78	829	100
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 Dare	A CSO AT FIELD ADJACENT TO DAVID ST	100	584	84.6
Dwr Cymru Welsh Water	Pandy Brook	TRELEWIS CSO - REAR OF GLYNBARGOED	125	481	95.9
Dwr Cymru Welsh Water	River Cynon	CSO at West Bank Of River South Of A455 Br	87	439	100
Dwr Cymru Welsh Water	Morlais Brook	CSO at The Bont, Merthyr Tydfil	105	430	98.4
Dwr Cymru Welsh Water	Nant-Y-Derlwyn	ABERDARE FORECOURT CSO LLWYDCOED	77	426	100
Dwr Cymru Welsh Water	Taff	CSO PONT RHUN MERTHYR TYDFIL	68	421	100
Dwr Cymru Welsh Water	Aberdare Canal	Pant-Y-Cerdin CSO, Aberdare	116	359	97
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	Unnamed Leading To River Cynon	Llwydcoed CSO Side of Llwydcoed Motors	66	239	99.2
Dwr Cymru Welsh Water	River Cynon	Cwmbach CSO - Outside Bro Deg	79	235	98.1
Dwr Cymru Welsh Water	River Taff	Gellideg Tai Mawr Rd CSO, Merthyr Tydfil	58	212	99.2
Dwr Cymru Welsh Water	River Cynon	CSO AT BOTTOM MONK STREET (Station St Aberdare)	67	202	100
Dwr Cymru Welsh Water	River Taff	CSO COLLEGE CAR PK MERTHYR TYDFIL	56	197	100
Dwr Cymru Welsh Water	River Aman	PLEASANT VIEW CSO	70	179	79.6
Dwr Cymru Welsh Water	Nant Morlais	Rocky Rd CSO Merthyr Tydfil	70	128	96.5
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Fiddlers Elbow St, Cynon	41	124	99
Dwr Cymru Welsh Water	River Cynon	Cwmbach Bro Deg Near No44	53	111	99.4
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Greenfield Victoria Bridge	22	103	40.6
Dwr Cymru Welsh Water	Nant Wenallt And Then To River Cynon	Forge Tip CSO Aberdare	52	89	77.2
Dwr Cymru Welsh Water	Morlais Brook	CSO TREVITHICK MONUMENT MERTHYR	40	76	29.5
Dwr Cymru Welsh Water	To Nant Gwrangon	CSO at Rhigos- Heol Pendarren	56	75	99.5
Dwr Cymru Welsh Water	River Cynon	CSO at Hirwaun Trenant No 66 Rear of Garden	6	51	1.4
Dwr Cymru Welsh Water	River Cynon	HIRWAUN - REAR OF BUTE TERRACE	28	48	99.8
Dwr Cymru Welsh Water	River Cynon	Aberaman Curre St CSO	28	44	99.2
Dwr Cymru Welsh Water	River Cynon River	Aberaman Wind St CSO Nr Mardy lodge	42	40	99.8
Dwr Cymru Welsh Water	River Taff	CSO Avenue De Clichy, Merthyr	27	38	100
Dwr Cymru Welsh Water	River Camnant	Hirwaun Wastewater Treatment Works	22	35	100
Dwr Cymru Welsh Water	River Cynon	Elizabeth St CSO	22	34	53.2
Dwr Cymru Welsh Water	River Dare	CSO Off Glan Road (St John the Baptist Church)	14	33	25.2
Dwr Cymru Welsh Water	River Cynon	CSO at Cwmbach Side of Police House	14	30	99.8
Dwr Cymru Welsh Water	Taf Fechan	High St CSO, Cefn Coed	36	25	88.2
Dwr Cymru Welsh Water	River Cynon	ABERNANT RUGBY CLUB CSO	29	23	100
Dwr Cymru Welsh Water	River Cynon	Canal Rd CSO, Cwmbach	9	22	99.7
Dwr Cymru Welsh Water	River Cynon	CSO at Rear of No12 Bonhaul, Cwmbach	8	20	99.9
Dwr Cymru Welsh Water	River Cynon	Cwmbach Sion Terrace No 11 CSO	13	19	99.7
Dwr Cymru Welsh Water	River Cynon	Penywaun - Rear Of 37/39 Erw L	27	17	96.7
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	River Cynon	Cwmbach SPS	7	13	99.8
Dwr Cymru Welsh Water	River Aman	Incline Row CSO, Aberaman	7	11	100
Dwr Cymru Welsh Water	Aman R - Source To Conf River Cynon	Aberaman Park Industrial Estate CSO, Aberdare	5	7	99.7
Dwr Cymru Welsh Water	River Cynon	CSO at Aberaman	8	7	99.6
Dwr Cymru Welsh Water	Morlais Brook	Brewers Arms CSO, Balaclava Rd, Dowlais	18	7	94.2
Dwr Cymru Welsh Water	River Cynon	No. 29 Maeshyfryd CSO, Cwmbach	13	6	100
Dwr Cymru Welsh Water	River Taff	Troedyrhiw, Yew Street CSO	5	6	83.1
Dwr Cymru Welsh Water	River Cynon	Abercwmboi Parkview Capcoch Infant School CSO	6	4	100
Dwr Cymru Welsh Water	Gadlys Feeder	GLADLYS TUDOR TERRACE CSO	15	4	99.9
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 Cynon	No 1 Wellington St CSO, Robertstown	4	1	88.3
Dwr Cymru Welsh Water	Unnamed Leading To Aman River	Aberaman Cynon St rear of	3	1	100
Dwr Cymru Welsh Water	River Aman	CSO at Junction of David St & Pant Rd, Aberaman	1	1	53
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	Aman R - Source To Conf River Cynon	Fforchaman Street CSO	2	0	100
Dwr Cymru Welsh Water	River Cynon	CSO at Rear Of St Winifreds Church Hirwa	1	0	100
Dwr Cymru Welsh Water	Nant-Y-Derlwyn	Trecynon, Harriet St CSO	1	0	57.3
Dwr Cymru Welsh Water	Bargoed Taf	CSO at QUAKERS YARD - NEAR PUBLIC HOU	1	0	99.3
Dwr Cymru Welsh Water	River Cynon	CSO at Hirwaun Trenant No70 Rear of Garden	0	0	0
Dwr Cymru Welsh Water	River Cynon	CSO at Cwmbach Bryngolwg No 45	0	0	70
Dwr Cymru Welsh Water	Nant Gwawr	CSO at No20 Glancynon Terrace, Aberaman	0	0	41
Dwr Cymru Welsh Water	Unnamed Stream And Thence To River Cynon	CSO at HIRWAUN - ON TRAMWAY	0	0	77.2
Dwr Cymru Welsh Water	Morlais Brook	Balaclava Rd CSO, Dowlais	0	0	100
Dwr Cymru Welsh Water	River Aman	CSO at Aberaman Cardiff Road No 104	0	0	12.3
Dwr Cymru Welsh Water	River Taff	TRUNK CSO 2A OFF ABERFAN ROAD	0	0	100
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, 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

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Merthyr Tydfil and Aberdare was polluted by sewage 3,015 times in 2023 lasting 15,316 hours - that's 1.77 years! - but monitoring was disabled in some locations, so could be more

68 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2023

Data Sources & Accuracy

Media Queries

Please Support Us

Merthyr Tydfil and Aberdare was polluted by sewage 3,015 times in 2023
lasting 15,316 hours - that's 1.77 years!
- but monitoring was disabled in some locations, so could be more