Ceredigion Preseli - 2025 Sewage

Polluted by sewage 81,658 hours in 2025 - That's 9.45 years

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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You're looking at the totals that we have calculated for sewage in Ceredigion Preseli for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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Constituencies near Ceredigion Preseli

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Ceredigion Preseli, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
Dwr Cymru Welsh Water Cwrtnewydd WwTW Storm Overflow Nant Cledlyn 266 3,072 h 15m 128
Dwr Cymru Welsh Water Boncath WwTW Storm Overflow Tributary of Afon Morgenau 148 2,648 h 44m 110.33
Dwr Cymru Welsh Water Llanfyrnach WwTW Storm Overflow River Taff 118 2,322 h 47m 96.75
Dwr Cymru Welsh Water Alltyblaca Overflow River Teifi 119 2,321 h 9m 96.71
Dwr Cymru Welsh Water Aberbanc Storm Overflow Afon Cynllo 107 2,131 h 15m 88.79
Dwr Cymru Welsh Water Cribyn WwTW Storm Overflow Afon Granell 180 2,111 h 35m 87.96
Dwr Cymru Welsh Water Scleddau Storm Overflow Afon Cledan 112 2,065 h 86.04
Dwr Cymru Welsh Water Maenclochog WwTW Storm Overflow Afon Rhydyfallen 133 1,908 h 49m 79.5
Dwr Cymru Welsh Water Cardigan WwTW Storm Overflow River Teifi 228 1,756 h 56m 73.17
Dwr Cymru Welsh Water Newport Cwm Storm Overflow Newport Bay 87 1,632 h 68
Dwr Cymru Welsh Water Tregaron WwTw Storm Overflow River Teifi 85 1,626 h 15m 67.75
Dwr Cymru Welsh Water Felindre Farchog Storm Overflow River Nevern 85 1,624 h 30m 67.67
Dwr Cymru Welsh Water Dinas Cross Fishguard Storm Overflow Tributary of Aber Bach 80 1,596 h 45m 66.5
Dwr Cymru Welsh Water Puncheston WwTW Storm Overflow Tributary of Afon Anghof 94 1,564 h 44m 65.17
Dwr Cymru Welsh Water Dinas Near Fishguard WwTW Overflow Sea 88 1,551 h 45m 64.62
Dwr Cymru Welsh Water Nanternis WwTW Overflow Afon Soden 82 1,499 h 18m 62.46
Dwr Cymru Welsh Water Verwig WwTW Storm Overflow Nant Verwig 73 1,494 h 44m 62.25
Dwr Cymru Welsh Water Silian Storm Overflow Afon Denys 67 1,476 h 44m 61.5
Dwr Cymru Welsh Water St. Dogmaels No.2 Storm Overflow River Teifi 68 1,406 h 15m 58.58
Dwr Cymru Welsh Water Fishguard Slade Sea Discharge Storm Overflow Fishguard Harbour 87 1,362 h 56.75
Dwr Cymru Welsh Water Glennydd Gilfachreda Storm Overflow Afon Lethi 85 1,361 h 56.71
Dwr Cymru Welsh Water Cilgerran No.1 Storm Overflow River Teifi 77 1,340 h 30m 55.83
Dwr Cymru Welsh Water Croesgoch WwTW Storm Overflow Porthgain Stream 64 1,335 h 14m 55.62
Dwr Cymru Welsh Water Crymmych WwTW Storm Overflow River Nevern 108 1,325 h 15m 55.21
Dwr Cymru Welsh Water Teifi Terrace No2 Storm Overflow River Teifi 104 1,305 h 20m 54.38
Dwr Cymru Welsh Water Ffostrasol WwTW Overflow Cerdin 149 1,276 h 23m 53.17
Dwr Cymru Welsh Water Llangeitho WwTW Overflow River Aeron 83 1,259 h 15m 52.46
Dwr Cymru Welsh Water Nebo WwTW Storm Overflow Afon Cledan 65 1,257 h 33m 52.38
Dwr Cymru Welsh Water Llanfyrnach Storm Overflow River Taff 70 1,244 h 15m 51.83
Dwr Cymru Welsh Water Bow Street Storm Overflow River Clarach 64 1,226 h 15m 51.08
Dwr Cymru Welsh Water Beulah WwTW Storm Overflow Nant Medini 131 1,222 h 52m 50.92
Dwr Cymru Welsh Water Llanychaer WwTW Storm Overflow River Gwaun 68 1,222 h 3m 50.92
Dwr Cymru Welsh Water Llechryd No 1 Storm Overflow River Teifi 72 1,075 h 10m 44.79
Dwr Cymru Welsh Water Porthgain WwTW Overflow Cardigan Bay South 68 1,073 h 4m 44.71
Dwr Cymru Welsh Water Cnwcau Storm Overflow River Teifi 50 1,037 h 43.21
Dwr Cymru Welsh Water Dolwen Storm Overflow Nant Cledlyn 56 1,002 h 15m 41.75
Dwr Cymru Welsh Water Taliesin Overflow Afon Leri 59 988 h 25m 41.17
Dwr Cymru Welsh Water Rhydlewis North PS Storm Overflow Nant Collen 57 978 h 15m 40.75
Dwr Cymru Welsh Water Pen-Y-Bryn Storm Overflow Afon Pilau 87 925 h 7m 38.54
Dwr Cymru Welsh Water St. Dogmaels Maeshyfryd Street Storm Overflow River Teifi 51 917 h 54m 38.21
Dwr Cymru Welsh Water Clynderwen Iron Duke Storm Overflow Tributary of the Cleddau Ddu 55 910 h 44m 37.92
Dwr Cymru Welsh Water Llwyncelyn WwTW Storm Overflow Afon Drywi 65 896 h 30m 37.33
Dwr Cymru Welsh Water Llanarth Bridge Storm Overflow Afon Llethi 81 874 h 15m 36.42
Dwr Cymru Welsh Water Llanon WwTW Storm Overflow Coastal Waters - Llansaintffraid 60 854 h 30m 35.58
Dwr Cymru Welsh Water Aberporth WwTW Storm Overflow Aberporth Coastal Waters 52 822 h 34.25
Dwr Cymru Welsh Water Llanfarian WwTW Settled Storm Overflow River Ystwyth 66 810 h 53m 33.75
Dwr Cymru Welsh Water The Parrog Goodwick Storm Overflow Goodwick Brook 61 802 h 4m 33.42
Dwr Cymru Welsh Water Hermon WwTW Storm Overflow Tributary of Afon Taf 66 704 h 29.33
Dwr Cymru Welsh Water Clarach Bay Overflow River Clarach 38 696 h 50m 29
Dwr Cymru Welsh Water Mydroilyn WwTW Storm Overflow Afon Mydr 96 679 h 45m 28.29
Dwr Cymru Welsh Water Aberaeron Storm Overflow Coastal Water - Cardigan Bay 52 670 h 35m 27.92
Dwr Cymru Welsh Water Llanddewi Brefi WwTW Storm Overflow Afon Brefi 37 627 h 5m 26.12
Dwr Cymru Welsh Water Penrhiwllan Storm Overflow Afon Iago 39 607 h 30m 25.29
Dwr Cymru Welsh Water Bridge Street Fishguard Storm Overflow Lower Town Harbour, Fishguard 72 590 h 24.58
Dwr Cymru Welsh Water St.Mary Street Storm Overflow River Teifi 92 563 h 29m 23.46
Dwr Cymru Welsh Water Blaenffos WwTW Storm Overflow River Nevern 34 553 h 35m 23.04
Dwr Cymru Welsh Water Llangranog Beach Storm Overflow Cardigan Bay 60 520 h 15m 21.67
Dwr Cymru Welsh Water Rhydlewis South WwTW Storm Overflow Nant Collen 43 511 h 30m 21.29
Dwr Cymru Welsh Water East of Ynyslas Beach Overflow Unnamed Ditch 33 470 h 45m 19.58
Dwr Cymru Welsh Water Pontrhydyceirt WwTW Overflow Morgenau 23 459 h 45m 19.12
Dwr Cymru Welsh Water Tregaron Storm Overflow Afon Brenig 32 424 h 15m 17.67
Dwr Cymru Welsh Water Pont-Y-Cleifion Storm Overflow River Teifi 59 399 h 55m 16.62
Dwr Cymru Welsh Water Glogue WwTW Storm Overflow River Taff 44 394 h 45m 16.42
Dwr Cymru Welsh Water Eglwyswrw WwTW Storm Overflow Nant Hafren 25 373 h 44m 15.54
Dwr Cymru Welsh Water Llanddewi Brefi Storm Overflow Afon Brefi 37 328 h 44m 13.67
Dwr Cymru Welsh Water Trefin WwTW Storm Overflow Aberdraw Stream 62 314 h 22m 13.08
Dwr Cymru Welsh Water Pennant WwTW Storm Overflow Afon Arth 92 309 h 20m 12.88
Dwr Cymru Welsh Water Newchapel WwTW Storm Overflow Tributary of Afon Dulas 34 295 h 14m 12.29
Dwr Cymru Welsh Water Llanfihangel-ar-arth WwTW Overflow River Teifi 25 276 h 11.5
Dwr Cymru Welsh Water Henllan Storm Overflow River Teifi 38 262 h 47m 10.92
Dwr Cymru Welsh Water Llechryd on Nant Arberth Storm Overflow Nant Arberth 23 246 h 15m 10.25
Dwr Cymru Welsh Water Mill View Llangranog Storm Overflow Nant Hawen 25 241 h 30m 10.04
Dwr Cymru Welsh Water Teifi Terrace No1 Storm Overflow River Teifi 37 233 h 13m 9.71
Dwr Cymru Welsh Water Northeast of Lewis Street Storm Overflow River Teifi 39 218 h 31m 9.08
Dwr Cymru Welsh Water Talybont Overflow Leri - Lower 28 214 h 8.92
Dwr Cymru Welsh Water Talgarreg WwTW Storm Overflow Afon Clettwr 37 190 h 30m 7.92
Dwr Cymru Welsh Water Lampeter Storm Overflow River Teifi 19 179 h 5m 7.46
Dwr Cymru Welsh Water Llanina WwTW Storm Overflow Coastal Waters - Llanina Point 33 175 h 30m 7.29
Dwr Cymru Welsh Water St Dogmaels Main Storm Overflow River Teifi 19 168 h 45m 7
Dwr Cymru Welsh Water Abercych Storm Overflow River Teifi 58 166 h 30m 6.92
Dwr Cymru Welsh Water Cilgerran WwTW Storm Overflow River Teifi 28 153 h 6.38
Dwr Cymru Welsh Water Ystrad Aeron Storm Overflow Tributary of Afon Aeron 51 148 h 3m 6.17
Dwr Cymru Welsh Water St Nicholas WwTW Storm Overflow Tributary of Aberbach Stream 68 140 h 49m 5.83
Dwr Cymru Welsh Water Harbour Lane Junction Storm Overflow Aberystwyth Harbour 44 140 h 10m 5.83
Dwr Cymru Welsh Water Cardigan Bridge Storm Overflow River Teifi 19 118 h 30m 4.92
Dwr Cymru Welsh Water Aberarth Storm Overflow Coastal Water - Cardigan Bay 15 115 h 44m 4.79
Dwr Cymru Welsh Water Llanfarian WwTW Inlet Storm Overflow River Ystwyth 13 109 h 4.54
Dwr Cymru Welsh Water Pontrhydfendigaid Storm Overflow River Teifi 46 104 h 27m 4.33
Dwr Cymru Welsh Water Adpar Storm Overflow River Teifi 8 104 h 19m 4.33
Dwr Cymru Welsh Water Cenarth WwTW Storm Overflow River Teifi 25 99 h 3m 4.12
Dwr Cymru Welsh Water Peniel Lane Storm Overflow Coastal Waters - Aberaeron 27 97 h 9m 4.04
Dwr Cymru Welsh Water Ffos-y-ffin Storm Overflow Ceri Brook 30 94 h 58m 3.92
Dwr Cymru Welsh Water Cardigan Cattle Market Storm Overflow River Teifi 16 86 h 15m 3.58
Dwr Cymru Welsh Water Aberystwyth Tan-Y-Cae Storm Overflow River Rheidol 12 79 h 3.29
Dwr Cymru Welsh Water Llanrhystud WwTW Storm Overflow River Wyre 21 70 h 30m 2.92
Dwr Cymru Welsh Water Railway Terrace Storm Overflow Goodwick Brook 33 63 h 39m 2.62
Dwr Cymru Welsh Water Lampeter Campus Storm Overflow River Dulais 30 49 h 43m 2.04
Dwr Cymru Welsh Water Pantycelyn Fishguard Storm Overflow Coastal Waters - Fishguard Harbour 36 47 h 30m 1.96
Dwr Cymru Welsh Water Gloster Row Storm Overflow River Teifi 16 42 h 45m 1.75
Dwr Cymru Welsh Water Mount Walk Crossroads Storm Overflow Nant Creudyyn 24 27 h 45m 1.12
Dwr Cymru Welsh Water Junction of Upper Mwldan and College Row Cardigan Storm Overflow Afon Mwldan 23 24 h 28m 1
Dwr Cymru Welsh Water Gwbert Overflow Cardigan Bay 7 21 h 0.88
Dwr Cymru Welsh Water Llanilar on Clos Henri Storm Overflow Drain to Nant Adail 5 17 h 30m 0.71
Dwr Cymru Welsh Water Llanwnnen South Storm Overflow Afon Grannell 5 14 h 45m 0.58
Dwr Cymru Welsh Water Wellington Place Car Park Storm Overflow New Quay Bay 5 13 h 0.54
Dwr Cymru Welsh Water Llanbadarn Fawr Storm Overflow Plas Crug Ditch 6 12 h 3m 0.5
Dwr Cymru Welsh Water Quay Street Car Park Storm Overflow River Teifi 5 10 h 29m 0.42
Dwr Cymru Welsh Water Off Church Street Cwm Plysgog Storm Overflow Afon Plysgog 9 9 h 56m 0.38
Dwr Cymru Welsh Water New Street Lampeter Storm Overflow River Teifi 14 9 h 45m 0.38
Dwr Cymru Welsh Water Clynderwen Final Effulent Storm Overflow Pont Shan Brook 5 9 h 18m 0.38
Dwr Cymru Welsh Water Waterloo Street Aberaeron Overflow Cardigan Bay Central 8 9 h 11m 0.38
Dwr Cymru Welsh Water Penparc Storm Overflow Nant Thyd-Y-Fuch Ditch 5 8 h 12m 0.33
Dwr Cymru Welsh Water Parrog Road Storm Overflow Tributary of Afon Nyfer 8 6 h 27m 0.25
Dwr Cymru Welsh Water Castle Morris WwTW Storm Overflow Western Cleddau 7 4 h 45m 0.17
Dwr Cymru Welsh Water Aberporth No. 1 Storm Overflow Nant Howni 2 2 h 30m 0.08
Dwr Cymru Welsh Water Spring Gardens New Quay Storm Overflow New Quay Bay 5 1 h 59m 0.04
Dwr Cymru Welsh Water South John Street Storm Overflow New Quay Bay 7 1 h 45m 0.04
Dwr Cymru Welsh Water Pentrellyn Storm Overflow River Ystwyth 1 1 h 0.04
Dwr Cymru Welsh Water Trefechan Bridge Storm Overflow River Rheidol 1 0 h 45m 0
Dwr Cymru Welsh Water Clarach WwTW Storm Overflow River Clarach 1 0 h 29m 0
Dwr Cymru Welsh Water Fifth Avenue Storm Overflow River Rheidol 1 0 h 28m 0
Dwr Cymru Welsh Water Heol Y Farchnad Road Storm Overflow Nant Aeron 1 0 h 15m 0
Dwr Cymru Welsh Water Pendard Storm Overflow New Quay Bay 1 0 h 14m 0
Dwr Cymru Welsh Water Fishguard Harbour PS Overflow Coastal Waters - Fishguard Harbour 1 0 h 8m 0
Dwr Cymru Welsh Water Lower Tresaith Storm Overflow Sea 0 0 h 0
Dwr Cymru Welsh Water Ceibwr Lane Moylegrove Storm Overflow Ceibwr Brook 0 0 h 0
Dwr Cymru Welsh Water Llanina Point Storm Overflow Coastal Waters - Llanina Point 0 0 h 0
Dwr Cymru Welsh Water Aberporth No. 2 Storm Overflow Nant Gilwen 0 0 h 0
Dwr Cymru Welsh Water Min-Y-Ddol Storm Overflow River Rheidol 0 0 h 0

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. Live sewage data from Stream Water API

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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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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