Ceredigion Preseli was polluted by sewage 8,252 times in 2024
lasting 94,836 hours - that's 10.98 years!

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
Select the constituency from the drop-down
✔ means we have experimental daily data since 2023
Totals for Ceredigion Preseli in 2024
121 Sites polluted by Dwr Cymru Welsh Water
8,252 sewage dumps
94,836 h duration
That's 10.98 years! On average 22.6 times a day
Change Over Time
Take Action
Your local MP is Ben Lake (Plaid Cymru) - Find out more about their interests, donors, and voting at They Work For You

Pollution Summary 2024

Here are all the reported sewage overflow totals for Ceredigion Preseli 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 126 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 River Cleddau SCLEDDAU EO AND CSO 189 3,997 99.8
Dwr Cymru Welsh Water River Taf Hermon STW Storm Overflow Hermon 191 3,354 99.8
Dwr Cymru Welsh Water River Teifi TREGARON WWTW TREGARON CEREDIGION 159 3,338 99.8
Dwr Cymru Welsh Water River Rhydyfallen MAENCLOCHOG STW CLYNDERWEN 194 3,204 99.9
Dwr Cymru Welsh Water Nant Cledlyn CWRT NEWYDD STW STORM OVERFLOW 222 3,181 99.5
Dwr Cymru Welsh Water Nant Verwig Settled Storm Overflow at Ferwig Wastewater Treatment Works 147 3,143 99
Dwr Cymru Welsh Water River Teifi Estuary Cardigan WwTW (STW) Cardigan Settled Storm 277 2,685 99.8
Dwr Cymru Welsh Water Aber Bach Dinas Cross SPS 131 2,528 99.8
Dwr Cymru Welsh Water River Taf Settled Storm Overflow at Llanfyrnach Wastewater Treatment Works 107 2,448 100
Dwr Cymru Welsh Water Newport Bay CWM SEWAGE PUMPING STATION 140 2,360 99.8
Dwr Cymru Welsh Water River Anghof PUNCHESTON Wastewater Treatment Works 144 2,285 99.5
Dwr Cymru Welsh Water Nant Medini BEULAH WWTW INLET SO BEULAH CERED'N 211 2,160 99.9
Dwr Cymru Welsh Water River Arth CSO at Pennant STW 291 2,154 98.5
Dwr Cymru Welsh Water Nant Cledyn CWRTNEWYDD STW CWRTNEWTDD 146 2,029 100
Dwr Cymru Welsh Water Aberdraw Stream CSO at Trevine STW 181 1,955 99.8
Dwr Cymru Welsh Water Nevern Felindre Farchog SPS 102 1,943 98.5
Dwr Cymru Welsh Water River Cledan CROSS INN / NEBO STW CSO 117 1,905 98.9
Dwr Cymru Welsh Water River Teifi Llechryd SPS 106 1,853 99.4
Dwr Cymru Welsh Water River Morgenau CSO at Boncath Wastewater Treatment Works 156 1,776 98.1
Dwr Cymru Welsh Water River Nevern Blaenffos WwTW CSO 92 1,744 100
Dwr Cymru Welsh Water River Taf, Via Surface Water Sewer Llanfrynach SPS 100 1,695 99.8
Dwr Cymru Welsh Water River Denys Silian PS Lampeter Ceredigion 93 1,636 98.8
Dwr Cymru Welsh Water River Grannell CSO at Cribyn WwTW, Ceredigion 130 1,600 78.8
Dwr Cymru Welsh Water River Nevern CRYMYCH STW 153 1,494 97.2
Dwr Cymru Welsh Water River Teifi TEIFI TERRACE CSO 179 1,445 91.4
Dwr Cymru Welsh Water River Teifi ST DOGMAELS NORTH END PS CSO AND EO 82 1,431 99
Dwr Cymru Welsh Water River Lethi GILFACHREDA CSO NEWQUAY CEREDIGION 98 1,410 99.3
Dwr Cymru Welsh Water River Teifi Cilgerran No 1 SPS 111 1,406 99.6
Dwr Cymru Welsh Water Bow Street Brook BOW STREET SPS BOW STREET 94 1,325 99.8
Dwr Cymru Welsh Water River Gwaun CSO at LLANYCHAER STW 97 1,311 99.8
Dwr Cymru Welsh Water Nant Collen Storm Overflow at Rhydlewis Wastewater Treatment Works 77 1,146 98.5
Dwr Cymru Welsh Water River Ystwyth LLANFARIAN WWTW LLANFARIAN CERED'N 111 1,126 99.57
Dwr Cymru Welsh Water River Morgenau BONCATH STW 88 1,119 100
Dwr Cymru Welsh Water River Nant Cledlyn Dolwen SPS 87 1,110 99.7
Dwr Cymru Welsh Water River Teifi Cilgerran Flyght PS 66 1,072 85.8
Dwr Cymru Welsh Water River Pilau Pen Y Bryn PS 109 1,050 99.8
Dwr Cymru Welsh Water Afan Daulan Iron Duke Clynderwen SPS 75 987 100
Dwr Cymru Welsh Water Coastal Waters Of Cardigan Bay ABERAERON PS EOF 74 964 99.8
Dwr Cymru Welsh Water River Grannell Cribyn Wastewater treament works 91 953 60
Dwr Cymru Welsh Water River Taf CSO at Glogue STW 95 938 99.8
Dwr Cymru Welsh Water River Taf LLANFYRNACH WWTW LLANFYRNACH PEMBS 49 875 99.8
Dwr Cymru Welsh Water River Llethi LLANARTH BRIDGE CSO LLANARTH CERE'N 88 811 97.4
Dwr Cymru Welsh Water River Teifi CSO at Rear of Teifi Inn PH, St Dogmaels 57 798 98.8
Dwr Cymru Welsh Water River Brennig Tregaron SPS (CSO and EO 107 745 99.3
Dwr Cymru Welsh Water Nant Arberth Llachryd Main SPS 51 695 99.8
Dwr Cymru Welsh Water Nant Collen RHYDLEWIS PS NO 1 73 666 98.7
Dwr Cymru Welsh Water Lower Town Harbour, Fishguard Fishguard Lower Town SPS 84 657 100
Dwr Cymru Welsh Water River Teifi LAMPETER STW LAMPETER 76 654 99.4
Dwr Cymru Welsh Water Coastal Waters At Llansaintffriad Llansantffraid SPS 65 654 99.3
Dwr Cymru Welsh Water River Drywi LLWYNCELYN STW 72 647 98.6
Dwr Cymru Welsh Water River Iago Penrhiwllan SPS 46 637 99.1
Dwr Cymru Welsh Water Coastal Waters Off Llanina Pt LLANINA WWTW/LL OLD H'DWATERS PS 48 630 99.8
Dwr Cymru Welsh Water River Taff Hermon Wastewater Treatment Works 32 629 100
Dwr Cymru Welsh Water Teifi CARDIGAN 2 188 549 83.1
Dwr Cymru Welsh Water Aberporth Coastal Waters ABERPORTH STW ABERPORTH , 52 542 99.8
Dwr Cymru Welsh Water River Brefi Llanddewi Brefi CSO 73 530 98.6
Dwr Cymru Welsh Water Sea DINAS STW . . 70 519 98.7
Dwr Cymru Welsh Water Nant Hafren EGLWYSWRW WWTW EGLWYSWRW NR NWPRT 30 507 99.7
Dwr Cymru Welsh Water River Teifi CILGERRAN STW 54 500 99.9
Dwr Cymru Welsh Water Goodwick Brook Parrog Goodwick SPS 56 474 99.9
Dwr Cymru Welsh Water Cardigan Bay LLANGRANOG WWTW LLANGRANOG 99 411 99.6
Dwr Cymru Welsh Water Coastal Water Off Llanina Pt LLANINA WWTW PS LLANINA NEW QUAY 31 395 99.8
Dwr Cymru Welsh Water Nant Medini BEULAH WWTW INLET SO BEULAH CERED'N 55 379 93.3
Dwr Cymru Welsh Water Fishguard Harbour Fishguard Slade SPS 57 366 99.3
Dwr Cymru Welsh Water River Brefi LLANDEWI BREFI WWTW LLANDEWI BREFI 29 324 99.3
Dwr Cymru Welsh Water Aberystwyth Harbour WATER ST.SWO.ABERAERON ABERAE 45 298 98.8
Dwr Cymru Welsh Water River Teifi Abercych SPS 84 287 99.7
Dwr Cymru Welsh Water River Teifi ADPAR WWTW ADPAR CEREDIGION 17 281 99.6
Dwr Cymru Welsh Water River Mydr Mydroilyn WwTW Storm Overflow 59 278 54.7
Dwr Cymru Welsh Water River Clettwr SPS at Talgarreg WWTW 45 236 99.6
Dwr Cymru Welsh Water River Rheidol TAN Y CAE PUMPING STATION ABERYSTY 21 231 99.6
Dwr Cymru Welsh Water Pont Shan Brook CLYNDERWEN STW 85 226 99.6
Dwr Cymru Welsh Water Nevern River Blaenffos WwTW 19 215 98.5
Dwr Cymru Welsh Water River Teifi Cardigan Hospital CSO 58 196 98.5
Dwr Cymru Welsh Water River Dulas Newchapel STW CSO 34 191 99.9
Dwr Cymru Welsh Water Coastal Water ABERARTH Sewage Pumping Station 23 188 99.5
Dwr Cymru Welsh Water River Aeron Brynog Arms Pumping Station 43 180 99.8
Dwr Cymru Welsh Water River Teifi HENLLAN STW 36 173 99.8
Dwr Cymru Welsh Water River Wyre LLANRHYSTUD WWTW CEREDIGION 35 152 99.8
Dwr Cymru Welsh Water Aberystwyth Harbour Wellington St CSO Abera Ab 43 142 99.5
Dwr Cymru Welsh Water River Teifi Cenarth Wastewater Treatment Works Inlet Storm Overflow 27 133 99.9
Dwr Cymru Welsh Water Plas Crug Ditch LLANBADARN PUMPING STATION 13 127 99.8
Dwr Cymru Welsh Water River Teifi Storm Overflow at Henllan Wastewater Treatment Works 40 111 97.9
Dwr Cymru Welsh Water River Teifi 1 TEIFI TERRACE CSO NEWCASTLE EMLYN 33 102 68
Dwr Cymru Welsh Water Ceri Brook Ffos-y-ffin CSO 32 98 99.2
Dwr Cymru Welsh Water River Teifi Cardigan Bridge PS Cardigan Ceren 18 97 84.4
Dwr Cymru Welsh Water Aberach Stream CSO at St Nicholas STW 87 92 99.8
Dwr Cymru Welsh Water Nant Hawen PUMPING STATION ADJ TO NANT HAWEN 10 91 72.2
Dwr Cymru Welsh Water River NEWCHAPEL STW 13 82 98.3
Dwr Cymru Welsh Water River Teifi CARDIGAN PUMPING STATION NO 5 18 74 99.8
Dwr Cymru Welsh Water River Dulas Station Terrace CSO Lampeter 39 69 99.8
Dwr Cymru Welsh Water River Teifi Gloster Row SPS 24 68 99.7
Dwr Cymru Welsh Water Goodwick Brook CSO at Emergent Culvert Goodwick 43 66 98.5
Dwr Cymru Welsh Water River Teifi Pontrhydfendigaid PS 21 58 99.7
Dwr Cymru Welsh Water Drain To Nant Adail Llanilar CSO at SPS 17 55 99.7
Dwr Cymru Welsh Water Fishguard Harbour Fishguard Ogof Martha SPS 45 52 99.3
Dwr Cymru Welsh Water Western Cleddau Castlemorris Wastewater Treatment CSO 15 48 99.6
Dwr Cymru Welsh Water River Teifi ST.DOGMAELS JEWSONS CSO MAIN CSO EO 5 40 99.3
Dwr Cymru Welsh Water River Teifi CENARTH WWTTW CENARTH CEREDIGION 8 36 99
Dwr Cymru Welsh Water Unnamed To Ystwyth PENTRELLYN PS 9 30 99.7
Dwr Cymru Welsh Water Nant Creuddyn SHOWFIELD DITCH CSO 35 27 99.8
Dwr Cymru Welsh Water Coastal Waters ROCK STREET PS NEW QUAY 5 23 99.5
Dwr Cymru Welsh Water River Mwldan GREENFIELD SQUARE CSO CARDIGAN CERE 31 22 99.8
Dwr Cymru Welsh Water River Rheidol CSO PONT ABERYSTWYTH ABERYSTWYTH 11 14 99.5
Dwr Cymru Welsh Water Western Cleddau MATHRY SPS NR FISHGUARD PEMBROKSHRE 3 13 100
Dwr Cymru Welsh Water Nant Howni ABERPORTH P.S. SSO NO.1 1 11 98.9
Dwr Cymru Welsh Water Unnamed Drainage Ditch CEI BACH SPS NEWQUAY CEREDIGION 1 7 99.8
Dwr Cymru Welsh Water Via A Surface Water Pipe To River Teifi Cardigan Pumping Station No.4 3 5 84.5
Dwr Cymru Welsh Water River Teifi BRIDGE STREET CSO LAMPETER 13 4 99.8
Dwr Cymru Welsh Water Nant Thyd-Y-Fuch Ditch Cardigan - Penparc CSO 4 2 92
Dwr Cymru Welsh Water River Rheidol PENPARCAU S.S. SSO , , 6 2 98.3
Dwr Cymru Welsh Water New Quay Bay CSO 790/CSO 800/CHIP SHOP CSO 6 1 96.6
Dwr Cymru Welsh Water Nant Guil-Ddu ABERPORTH P.S. SSO 2 1 99.7
Dwr Cymru Welsh Water River Grannell A Sewage Pumping Station at Llanwnen, Llanybydder 2 1 99.8
Dwr Cymru Welsh Water New Quay Bay CSO SOUTH JOHN STREET NEW QUAY 3 0 99.6
Dwr Cymru Welsh Water River Plysgog PENRALLTDRAW COMBINED SEWER CSO 1 0 15.3
Dwr Cymru Welsh Water Nant Aeron 4 TOAD HALL CSO 2 0 99.5
Dwr Cymru Welsh Water Western Cleddau MATHRY STW NR FISHGUARD PEMBROKSHRE 1 0 99.6
Dwr Cymru Welsh Water River Teifi St Dogmaels CSO 1 0 99.4
Dwr Cymru Welsh Water Fishguard Harbour FISHGUARD HARBOUR (CRANE) CSO 1 0 91.6
Dwr Cymru Welsh Water River Nyfer The Parrog Newport CSO 1 0 15.2
Dwr Cymru Welsh Water Irish Sea Tresaith CSO 0 0 99.3
Dwr Cymru Welsh Water River Rheidol CSO AT 18 MIN Y DDOL 0 0 98
Dwr Cymru Welsh Water Porthgain Stream CROESGOCH WORKS INLET 0 0 100
Dwr Cymru Welsh Water Porthgain Stream Croesgoch Wastewater Treatment Works 0 0 99
Dwr Cymru Welsh Water River Clarach Clarach STW 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.