Top of the Poops | Waterway

Totals for River Taff in 2023

26 Sites polluted by Dwr Cymru Welsh Water

1,506 sewage dumps
13,100 h duration

That's 1.52 years! On average 4.1 times a day

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Constituencies along River Taff

Pollution Summary 2023

Here are all the reported sewage overflow totals for River Taff in 2023. Sometimes sewage can be being dumped for months at a time.

These numbers are very slightly different from the Rivers page. We're working on it.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Taff	Settled Storm at Cynon Valley Wastewater Treatment Works	167	2,789	99.8
Dwr Cymru Welsh Water	River Taff	Tongwynlais CSO	131	2,592	100
Dwr Cymru Welsh Water	River Taff	Cilfynydd STW Cilfynydd Pontypridd Settled Storm	146	2,461	100
Dwr Cymru Welsh Water	River Taff	Tonteg Road, Upper Boat CSO and Pumping Station Emergency Overflow	160	1,486	100
Dwr Cymru Welsh Water	River Taff	CASTLE INN CSO ASSET NO 32280	157	1,277	97.1
Dwr Cymru Welsh Water	River Taff	Abercynon Wood Rd SPS	79	511	100
Dwr Cymru Welsh Water	River Taff	A CSO AT JACKSONS BRIDGE	99	343	100
Dwr Cymru Welsh Water	River Taff	YNYSANGHARAD PARK CSO	91	319	99.9
Dwr Cymru Welsh Water	River Taff	Ynys Bridge CSO	47	297	99.6
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	River Taff	Crossbrook St CSO, Pontypridd	60	128	95.8
Dwr Cymru Welsh Water	River Taff	Rhydfelin CSO Off Lionel Terrace	17	128	79.1
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Fiddlers Elbow St, Cynon	41	124	99
Dwr Cymru Welsh Water	River Taff	Quakers Yard CSO, Greenfield Victoria Bridge	22	103	40.6
Dwr Cymru Welsh Water	River Taff	CSO Avenue De Clichy, Merthyr	27	38	100
Dwr Cymru Welsh Water	River Taff	Pontypridd West Street CSO	40	20	99.8
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	River Taff	Cardiff Wood St/Havelock St Jn CSO	18	11	99.7
Dwr Cymru Welsh Water	River Taff	YNYSANGHARAD HIGH LEVEL RELIEF CSO	2	9	99.9
Dwr Cymru Welsh Water	River Taff	Troedyrhiw, Yew Street CSO	5	6	83.1
Dwr Cymru Welsh Water	River Taff	Park Street PS	12	4	100
Dwr Cymru Welsh Water	River Taff	Sion Street Sewage Pumping Station	2	4	99.7
Dwr Cymru Welsh Water	River Taff	TROEDYRHIW PS	4	4	98.5
Dwr Cymru Welsh Water	River Taff	3rd Trunk CSO South of Glan Yr Afon	2	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
Dwr Cymru Welsh Water	River Taff	Taff St CSO, Pontypridd	0	0	58.5

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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River Taff polluted by sewage 1,506 times in 2023 - lasting 13,100 hours

26 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2023

Data Sources & Accuracy

Media Queries

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