Pontypridd was polluted by sewage 3,124 times in 2024
lasting 22,612 hours - that's 2.62 years!

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Totals for Pontypridd in 2024
49 Sites polluted by Dwr Cymru Welsh Water
3,124 sewage dumps
22,612 h duration
That's 2.62 years! On average 8.6 times a day
Change Over Time
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Constituencies near Pontypridd
Waterways in Pontypridd

Pollution Summary 2024

Here are all the reported sewage overflow totals for Pontypridd in 2024. 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 0 of the total 53 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water Ewenny Fach CSO at Hillside Avenue Llanharan 205 3,068 94
Dwr Cymru Welsh Water River Ely DUFFRYN ISAF SEWAGE TREATMENT WORKS 199 2,968 99.7
Dwr Cymru Welsh Water River Taff Cilfynydd STW Cilfynydd Pontypridd Settled Storm 157 2,597 99.8
Dwr Cymru Welsh Water River Taff Settled Storm at Cynon Valley Wastewater Treatment Works 106 1,586 99.8
Dwr Cymru Welsh Water River Cynon PONTCYNON PIPE BRIDGE CSO ABERCYNON 106 1,276 98.1
Dwr Cymru Welsh Water River Taff Tonteg Road, Upper Boat CSO and Pumping Station Emergency Overflow 150 1,107 99.8
Dwr Cymru Welsh Water Nant Myddlyn CSO ADJACENT TO PARISH ROAD BEDDA 151 941 97.5
Dwr Cymru Welsh Water River Rhondda A COMBINED SEWER OVERFLOW GYFEILLON 141 854 99.8
Dwr Cymru Welsh Water Ewenni Fach CSO SOUTH OF RAILWAY LLANHAREN 109 841 91
Dwr Cymru Welsh Water Nant Clydach Tank Near Pit CSO Ynysybwl 129 785 93.6
Dwr Cymru Welsh Water River Taff CYNON VALLEY STW GLYNCOCH PONTY 50 776 99.8
Dwr Cymru Welsh Water River Taff Abercynon Wood Rd SPS 85 639 99.7
Dwr Cymru Welsh Water River Ely Lanelay Park - CSO 120 628 99.8
Dwr Cymru Welsh Water Nant Clydach GLYN STREET CSO GLYN ST YNYSYBWL 106 577 98.7
Dwr Cymru Welsh Water River Taff CASTLE INN CSO ASSET NO 32280 109 537 98.5
Dwr Cymru Welsh Water River Rhondda CSO at Pwllgwuan Syphons, Millfield, Pontypridd 110 495 98
Dwr Cymru Welsh Water River Cynon Oxford St CSO, Mountain Ash 107 457 98.3
Dwr Cymru Welsh Water River Clun Penygawsi CSO 66 349 99.8
Dwr Cymru Welsh Water Nant Clydach CSO at Clydach Rd, Ynysbwl 50 275 95.7
Dwr Cymru Welsh Water River Taff YNYSANGHARAD PARK CSO 97 252 99.8
Dwr Cymru Welsh Water River Cynon CSO Opposite Miskin Hotel, far side of railway 46 224 42.3
Dwr Cymru Welsh Water Nant Clydach Old Parish Road CSO, Ynysbwl 88 219 92.7
Dwr Cymru Welsh Water River Taff Rhydfelin CSO Off Lionel Terrace 33 173 98.8
Dwr Cymru Welsh Water River Cynon Glassbrook Terrace CSO, Penrhiwceiber 56 137 98.1
Dwr Cymru Welsh Water Nant Arian New Society Garage CSO 50 131 99.8
Dwr Cymru Welsh Water River Taff Crossbrook St CSO, Pontypridd 50 122 94.9
Dwr Cymru Welsh Water River Cynon NEWTOWN COMMUNITY HALL CSO 36 93 99
Dwr Cymru Welsh Water River Cynon Duffryn Rd Mount 2 CSO 28 86 99
Dwr Cymru Welsh Water Nant Tyrarlwudd Penycoedcae SPS 70 83 99.9
Dwr Cymru Welsh Water Rhondda River Pavia Courth CSO, Pontypridd 68 79 95.3
Dwr Cymru Welsh Water River Cynon Penrhiwceiber Point D CSO 37 39 96.6
Dwr Cymru Welsh Water River Rhondda Pellgwaun CSO 29 36 99.8
Dwr Cymru Welsh Water River Clun Via An Unnamed Ditch Talbot Green CSO 15 34 27.3
Dwr Cymru Welsh Water R Cynon - Conf Aman R To Conf R Taff Station Terrace CSO, Penrhiwceiber 25 29 82.8
Dwr Cymru Welsh Water River Taff Pontypridd West Street CSO 49 24 98.9
Dwr Cymru Welsh Water River Rhondda Lower Mill Street CSO Pontypridd 14 22 96.4
Dwr Cymru Welsh Water Nant Cymdda Bach Brynteg Park Pumping Station Beddau 14 19 99.5
Dwr Cymru Welsh Water Nant Cae-Dudwg End of Park Place CSO, Cilfynydd 11 10 99.4
Dwr Cymru Welsh Water Culvert NEW ROAD SEWERAGE SYSTEM (REDESIGNE 16 7 77
Dwr Cymru Welsh Water River Rhondda Lanelay Crescent CSO, Maesycoed 14 6 98.4
Dwr Cymru Welsh Water River Taff YNYSANGHARAD HIGH LEVEL RELIEF CSO 2 4 99.4
Dwr Cymru Welsh Water River Cynon TOWN HALL 2 4 99.8
Dwr Cymru Welsh Water River Taff Sion Street Sewage Pumping Station 1 2 99.8
Dwr Cymru Welsh Water River Rhondda Pwllgwaun Rd CSO, pontypridd 5 2 99.1
Dwr Cymru Welsh Water R Taff - Conf Rhondda R To Castle Street CSO at Treforest Llantwit Rd A 6 1 82.1
Dwr Cymru Welsh Water River Cynon Cwmpennar CSO, Adj Low Rd, Mountain Ash 2 1 59.3
Dwr Cymru Welsh Water River Nant Felin Fach Llanharry SPS 1 0 99.8
Dwr Cymru Welsh Water River Taff Taff St CSO, Pontypridd 2 0 94.9
Dwr Cymru Welsh Water Nant Clydach CSO O/S 2 Clydach Terrace, Ynysybwl 1 0 8.4
Dwr Cymru Welsh Water River Cynon Abercynon Rugby Club CSO 0 0 96.9
Dwr Cymru Welsh Water Taff Cardiff Road CSO, Pontypridd 0 0 87.3
Dwr Cymru Welsh Water River Cynon No 10 Hamilton St CSO, Mountain Ash 0 0 17.7
Dwr Cymru Welsh Water Nant Cae-Dudwg PARK PLACE CSO 0 0 99.8

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.

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