Top of the Poops | Constituency Sewage Map

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You're looking at the totals that we have calculated for sewage in Pontypridd so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Cilfynydd WwTW Storm Overflow	River Taff	46	938 h 30m	-
Dwr Cymru Welsh Water	River Row Abercynon Overflow	River Cynon	44	872 h 26m	-
Dwr Cymru Welsh Water	Dyffryn Isaf WwTW Storm Overflow	River Ely	35	555 h 30m	-
Dwr Cymru Welsh Water	Tonteg Road Taff Vale Storm Overflow	River Taff	38	494 h 25m	-
Dwr Cymru Welsh Water	Pontcynon Pipe Bridge Storm Overflow	River Cynon	35	461 h 38m	-
Dwr Cymru Welsh Water	Abercynon Wood Road Storm Overflow	River Taff	32	379 h 15m	-
Dwr Cymru Welsh Water	Parish Road Beddau Storm Overflow	Nant Myddlyn	35	330 h 17m	-
Dwr Cymru Welsh Water	Llanharan Storage Storm Overflow	Ewenni Fach River	27	188 h 45m	-
Dwr Cymru Welsh Water	Robert Street Storm Overflow	Nant Clydach	26	175 h 2m	-
Dwr Cymru Welsh Water	Crossbrook Street Storm Overflow	River Taff	24	115 h 18m	-
Dwr Cymru Welsh Water	Glynmynach Street Storm Overflow	Nant Clydach	25	114 h 36m	-
Dwr Cymru Welsh Water	Bethlehem View Fields Storm Overflow	Ewenni Fach River	25	83 h 39m	-
Dwr Cymru Welsh Water	James Street Junction Overflow	River Taff	8	75 h 28m	-
Dwr Cymru Welsh Water	South of Lee Street Storm Overflow	River Rhondda	20	72 h 42m	-
Dwr Cymru Welsh Water	Lanelay Park Storm Overflow	River Ely	25	65 h 45m	-
Dwr Cymru Welsh Water	Miskin Road Railway Storm Overflow	River Cynon	17	54 h 59m	-
Dwr Cymru Welsh Water	Oxford Street Miskin Road Storm Overflow	River Cynon	12	37 h 2m	-
Dwr Cymru Welsh Water	Ynysangharad Park Pontypridd Storm Overflow	River Taff	36	32 h 40m	-
Dwr Cymru Welsh Water	Old Parish Road Storm Overflow	Nant Clydach	15	32 h 37m	-
Dwr Cymru Welsh Water	Gyfeillon Gardens Storm Overflow	River Rhondda	24	26 h 54m	-
Dwr Cymru Welsh Water	Treforest Lewistown Park Overflow	River Taff	5	22 h 13m	-
Dwr Cymru Welsh Water	Clydach Road Ynysybwl Storm Overflow	Nant Clydach	8	19 h 32m	-
Dwr Cymru Welsh Water	Cardiff Road Talbot Green Storm Overflow	River Clun	7	18 h	-
Dwr Cymru Welsh Water	Penycoedcae Storm Overflow	Tributary of Nant Tyrarlwudd	23	17 h 40m	-
Dwr Cymru Welsh Water	Ynysybwl Road Taff Vale Overflow	River Taff	17	13 h 30m	-
Dwr Cymru Welsh Water	Glassbrook Terrace Storm Overflow	River Cynon	7	7 h 41m	-
Dwr Cymru Welsh Water	Heol Saelm Garages Storm Overflow	Nant Arian	4	6 h 15m	-
Dwr Cymru Welsh Water	Duffryn Road Mountain Ash Overflow	River Cynon	2	5 h 43m	-
Dwr Cymru Welsh Water	Lionel Terrace Storm Overflow	River Taff	2	4 h 15m	-
Dwr Cymru Welsh Water	West Street Pontypridd Storm Overflow	River Taff	3	3 h 28m	-
Dwr Cymru Welsh Water	New Road Mountain Ash Storm Overflow	River Cynon	3	3 h 13m	-
Dwr Cymru Welsh Water	Clydach Terrace Storm overflow	Nant Clydach	3	2 h	-
Dwr Cymru Welsh Water	Pavia Court Storm Overflow	River Rhondda	3	1 h 27m	-
Dwr Cymru Welsh Water	Penrhiwceiber Point D Storm Overflow	River Cynon	4	1 h 15m	-
Dwr Cymru Welsh Water	Penrhiwceiber Station Storm Overflow	River Cynon	3	0 h 46m	-
Dwr Cymru Welsh Water	Poplar Road Rhydyfelin Overflow	River Taff	1	0 h 23m	-
Dwr Cymru Welsh Water	Sheppard Street Storm Overflow	River Rhondda	1	0 h 15m	-
Dwr Cymru Welsh Water	Cynon WwTW Storm Overflow	River Taff	1	0 h 15m	-
Dwr Cymru Welsh Water	Ty Mawr Road Pontypridd Overflow	River Rhondda	1	0 h 14m	-
Dwr Cymru Welsh Water	Heol Miles Storm Overflow	River Ely	1	0 h 14m	-
Dwr Cymru Welsh Water	Martins Terrace Abercynon Overflow	River Taff	1	0 h 13m	-
Dwr Cymru Welsh Water	Llantwit Road Storm Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Maesycoe Lanelay Crescent Storm Overflow	River Rhondda	0	0 h	-
Dwr Cymru Welsh Water	Cardiff Road Mountain Ash Storm Overflow	River Cynon	0	0 h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0 h	-
Dwr Cymru Welsh Water	Ynysangharad Park Bridge Storm Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Hamilton Street Storm Overflow	River Cynon	0	0 h	-
Dwr Cymru Welsh Water	Park Place Cilfnydd 1 Storm Overflow	Nant Caedudwg	0	0 h	-
Dwr Cymru Welsh Water	St Annes Drive Llantwit Fardre Overflow	Nant Clun	0	0 h	-
Dwr Cymru Welsh Water	Cribbyn-Ddu Street Junction Storm Overflow	River Clydach	0	0 h	-
Dwr Cymru Welsh Water	High Street Pontypridd Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0 h	-
Dwr Cymru Welsh Water	Cynon Terrace Penrhiwceiber Overflow	River Cynon	0	0 h	-
Dwr Cymru Welsh Water	Glyn Dwr Avenue Pontypridd Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Mill Street Pontypridd Storm Overflow	River Rhondda	0	0 h	-
Dwr Cymru Welsh Water	Castle Inn Bridge Storm Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Park Road Abercynon Storm Overflow	Sirhowy River	0	0 h	-
Dwr Cymru Welsh Water	Bridgend Road Llanharan Overflow	River Ewenni	0	0 h	-
Dwr Cymru Welsh Water	Alexandra Road Pontypridd Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Cardiff Road Pontypridd Storm Overflow	River Taff	0	0 h	-
Dwr Cymru Welsh Water	Brynteg Park Storm Overflow	Nant Cymdda Bach	0	0 h	-
Dwr Cymru Welsh Water	Park Hill Mountain Ash Overflow	River Cynon	0	0 h	-
Dwr Cymru Welsh Water	Pwllgwaun Road Storm Overflow	River Rhondda	0	0 h	-
Dwr Cymru Welsh Water	Low Row Cwmpennar Storm Overflow	Tributary of River Cynon	0	0 h	-
Dwr Cymru Welsh Water	Park Place Clifnydd 2 Storm Overflow	Nant Cae-Dudwg	0	0 h	-

It's a Dirty Business

Pontypridd - Live Sewage

Polluted by sewage 5,236 hours in 2026 so far..

Pontypridd - Live Sewage

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It's a Dirty Business

Pontypridd - Live Sewage Polluted by sewage 5,236 hours in 2026 so far..

Pontypridd - Live Sewage

Which Year?

Select Another Constituency

View Annual Sewage Data

Take Action

Constituencies near Pontypridd

Daily Data

We need your support!

Totals so far

Data Sources & Accuracy

Media Queries

Please Support Us

Pontypridd - Live Sewage

Polluted by sewage 5,236 hours in 2026 so far..