Cynon Valley polluted by sewage 2,608 times in 2022 - lasting 17,287 hours

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Contains OS Data © Crown copyright & database right 2021-2022
© Top of the Poops 2021-2023
✔ means we have experimental daily data for 2023
Totals for Cynon Valley in 2022
58 Sites polluted by Dwr Cymru Welsh Water
2,608 sewage dumps
17,287 h duration
That's 2 years! On average 7.1 times a day
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Constituencies near Cynon Valley
Waterways in Cynon Valley

Pollution Summary 2022

Here are all the reported sewage overflow totals for Cynon Valley in 2022. Sometimes sewage can be being dumped for months at a time.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water R Cynon - Conf Aman R To Conf R Taff CSO at R/O 69/70 Bronallt terrace, Abercwmboi 119 2,579 90.8
Dwr Cymru Welsh Water River Taff Settled Storm at Cynon Valley Wastewater Treatment Works 135 2,213 100
Dwr Cymru Welsh Water River Taff Cilfynydd STW Cilfynydd Pontypridd Settled Storm 102 1,831 100
Dwr Cymru Welsh Water River Cynon CSO Opposite Arthurs Place Trecynon 143 1,562 100
Dwr Cymru Welsh Water River Cynon MIKES FIELD CSO ABERAMAN 106 1,482 100
Dwr Cymru Welsh Water River Cynon PONTCYNON PIPE BRIDGE CSO ABERCYNON 93 1,081 98.3
Dwr Cymru Welsh Water River Cynon Penderyn CSO - Tank In Field Raked Scre 106 868 97
Dwr Cymru Welsh Water Nant Clydach Tank Near Pit CSO Ynysybwl 117 662 99
Dwr Cymru Welsh Water River Cynon CSO at West Bank Of River South Of A455 Br 81 457 100
Dwr Cymru Welsh Water Nant Clydach GLYN STREET CSO GLYN ST YNYSYBWL 101 454 99.1
Dwr Cymru Welsh Water Nant-Y-Derlwyn ABERDARE FORECOURT CSO LLWYDCOED 78 406 100
Dwr Cymru Welsh Water River Taff Abercynon Wood Rd SPS 72 405 100
Dwr Cymru Welsh Water River Cynon CSO at Hirwaun Trenant No 66 Rear of Garden 72 350 99.3
Dwr Cymru Welsh Water Aberdare Canal Pant-Y-Cerdin CSO, Aberdare 94 318 98.1
Dwr Cymru Welsh Water River Cynon CSO At Bottom Monk Street 79 275 100
Dwr Cymru Welsh Water Unnamed Leading To River Cynon Llwydcoed CSO Side of Llwydcoed Motors 61 274 99.3
Dwr Cymru Welsh Water River Cynon CSO Opposite Miskin Hotel, far side of railway 48 274 34.5
Dwr Cymru Welsh Water River Cynon CSO AT BOTTOM MONK STREET (Station St Aberdare) 66 232 100
Dwr Cymru Welsh Water River Cynon Cwmbach CSO - Outside Bro Deg 59 177 95.1
Dwr Cymru Welsh Water River Aman PLEASANT VIEW CSO 62 136 88.3
Dwr Cymru Welsh Water Nant Clydach CSO at Clydach Rd, Ynysbwl 27 128 61.1
Dwr Cymru Welsh Water River Cynon Cwmbach Bro Deg Near No44 47 108 99.5
Dwr Cymru Welsh Water River Cynon Oxford St CSO, Mountain Ash 42 101 67.3
Dwr Cymru Welsh Water River Cynon Glassbrook Terrace CSO, Penrhiwceiber 50 90 99.3
Dwr Cymru Welsh Water Nant Clydach CSO O/S 2 Clydach Terrace, Ynysybwl 36 78 80.6
Dwr Cymru Welsh Water River Cynon CSO ABERAMAN IND EST ABERAMAN 9 75 61.1
Dwr Cymru Welsh Water River Cynon River Aberaman Wind St CSO Nr Mardy lodge 50 61 96.8
Dwr Cymru Welsh Water River Cynon Duffryn Rd Mount 2 CSO 30 56 99.7
Dwr Cymru Welsh Water River Cynon Elizabeth St CSO 51 55 99.7
Dwr Cymru Welsh Water Nant Clydach Old Parish Road CSO, Ynysbwl 25 54 45.4
Dwr Cymru Welsh Water To Nant Gwrangon CSO at Rhigos- Heol Pendarren 27 50 82.2
Dwr Cymru Welsh Water River Cynon NEWTOWN COMMUNITY HALL CSO 28 43 99.8
Dwr Cymru Welsh Water River Cynon Canal Rd CSO, Cwmbach 9 37 45.8
Dwr Cymru Welsh Water River Cynon ABERNANT RUGBY CLUB CSO 37 36 99.9
Dwr Cymru Welsh Water River Cynon Aberaman Curre St CSO 32 35 97.2
Dwr Cymru Welsh Water R Cynon - Conf Aman R To Conf R Taff Station Terrace CSO, Penrhiwceiber 47 33 99.2
Dwr Cymru Welsh Water River Cynon HIRWAUN - REAR OF BUTE TERRACE 21 29 99.3
Dwr Cymru Welsh Water River Aman CSO at Aberaman Cardiff Road No 104 34 28 88.5
Dwr Cymru Welsh Water River Cynon Penywaun - Rear Of 37/39 Erw L 38 24 99.6
Dwr Cymru Welsh Water River Cynon CSO at Cwmbach Side of Police House 17 23 99.9
Dwr Cymru Welsh Water River Cynon Penrhiwceiber Point D CSO 38 23 99.8
Dwr Cymru Welsh Water River Cynon TOWN HALL 22 16 91.5
Dwr Cymru Welsh Water River Camnant Hirwaun Wastewater Treatment Works 15 16 100
Dwr Cymru Welsh Water Nant Wenallt And Then To River Cynon Forge Tip CSO Aberdare 29 13 99.8
Dwr Cymru Welsh Water River Cynon CSO at Rear of No12 Bonhaul, Cwmbach 10 7 99.8
Dwr Cymru Welsh Water Nant Cae-Dudwg End of Park Place CSO, Cilfynydd 6 5 99.7
Dwr Cymru Welsh Water River Cynon Cwmpennar CSO, Adj Low Rd, Mountain Ash 3 3 59.1
Dwr Cymru Welsh Water River Cynon Cwmbach Sion Terrace No 11 CSO 6 3 97.2
Dwr Cymru Welsh Water River Cynon CSO at Aberaman 6 2 98.9
Dwr Cymru Welsh Water River Cynon Abercwmboi Parkview Capcoch Infant School CSO 5 1 100
Dwr Cymru Welsh Water Unnamed Leading To Aman River Aberaman Cynon St rear of 4 1 100
Dwr Cymru Welsh Water Gadlys Feeder GLADLYS TUDOR TERRACE CSO 4 1 99.9
Dwr Cymru Welsh Water River Cynon No. 29 Maeshyfryd CSO, Cwmbach 2 0 100
Dwr Cymru Welsh Water River Cynon CSO at Rear Of St Winifreds Church Hirwa 2 0 100
Dwr Cymru Welsh Water River Cynon CSO at Hirwaun Trenant No70 Rear of Garden 2 0 82.1
Dwr Cymru Welsh Water Nant Cae-Dudwg PARK PLACE CSO 1 0 100
Dwr Cymru Welsh Water Unnamed Stream And Thence To River Cynon CSO at HIRWAUN - ON TRAMWAY 1 0 74.7
Dwr Cymru Welsh Water River Aman CSO at Junction of David St & Pant Rd, Aberaman 1 0 75.6
Dwr Cymru Welsh Water Aman R - Source To Conf River Cynon Fforchaman Street CSO 0 0 100
Dwr Cymru Welsh Water River Dare CSO Off Glan Road (St John the Baptist Church) 0 0 0
Dwr Cymru Welsh Water River Dare A CSO AT FIELD ADJACENT TO DAVID ST 0 0 0
Dwr Cymru Welsh Water Nant Gwawr CSO at No20 Glancynon Terrace, Aberaman 0 0 99.6
Dwr Cymru Welsh Water River Cynon No 1 Wellington St CSO, Robertstown 0 0 28.2
Dwr Cymru Welsh Water River Cynon Cwmbach SPS 0 0 99.4
Dwr Cymru Welsh Water Nant-Y-Derlwyn Trecynon, Harriet St CSO 0 0 0
Dwr Cymru Welsh Water River Cynon No 10 Hamilton St CSO, Mountain Ash 0 0 99.5
Dwr Cymru Welsh Water River Cynon Abercynon Rugby Club CSO 0 0 99.7
Dwr Cymru Welsh Water Culvert NEW ROAD SEWERAGE SYSTEM (REDESIGNE 0 0 0
Dwr Cymru Welsh Water Aman R - Source To Conf River Cynon Aberaman Park Industrial Estate CSO, Aberdare 0 0 99.9
Dwr Cymru Welsh Water River Cynon CSO at Cwmbach Bryngolwg No 45 0 0 53.3
Dwr Cymru Welsh Water River Aman Incline Row CSO, Aberaman 0 0 98.3

Data Sources & Accuracy

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

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.

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