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Bangor Aberconwy - Live Sewage

Polluted by sewage 15,886 hours in 2026 - That's 1.84 years so far..

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Bangor Aberconwy 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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Constituencies near Bangor Aberconwy

Daily Data

Jan - 4,429 hours
Feb - 5,829 hours
Mar - 3,743 hours
Apr - 1,795 hours
May - 88 hours
Jun - 0 hours
Jul - 0 hours
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Dwr Cymru Welsh Water Cwm Penmachno WwTW Storm Overflow River Machno 111 2,459h 14m -
Dwr Cymru Welsh Water Capel Curig WwTW Storm Overflow Afon Lliw 129 2,192h 59m -
Dwr Cymru Welsh Water Dolwyddelan WwTW Storm Overflow Afon Lledr 86 1,381h 8m -
Dwr Cymru Welsh Water Tregarth WwTW Storm Overflow Afon Ogwen 73 1,153h 19m -
Dwr Cymru Welsh Water Talybont WwTW Storm Overflow River Dulyn 64 1,075h 16m -
Dwr Cymru Welsh Water Cwm Penmachno Storm Overflow unnamed ditch 55 958h 44m -
Dwr Cymru Welsh Water Penmaenmawr WwTW Storm Overflow Coastal Waters - Conwy Bay 55 854h 23m -
Dwr Cymru Welsh Water Bethesda WwTW Storm Overflow River Ogwen 72 656h 32m -
Dwr Cymru Welsh Water Trefriw WwTW Storm Overflow River Crafnant 65 582h 43m -
Dwr Cymru Welsh Water Bangor Treborth WwTW Storm Overflow Menai Strait 41 531h 45m -
Dwr Cymru Welsh Water Pwll-Glas WwTW Storm Overflow River Clwyd 36 530h 55m -
Dwr Cymru Welsh Water Glasinfryn Storm Overflow Afon Cegin 40 443h -
Dwr Cymru Welsh Water Clawddnewydd WwTW Storm Overflow Tributary of the Nant-Y-Cefn 17 334h 15m -
Dwr Cymru Welsh Water Llan Penmachno WwTW Storm Overflow River Machno 28 274h 45m -
Dwr Cymru Welsh Water Betws Yn Rhos WwTW Storm Overflow Tributary of Afon Dulas 20 267h 3m -
Dwr Cymru Welsh Water Pwll-Glas WwTW Inlet Storm Overflow River Clwyd 28 238h 43m -
Dwr Cymru Welsh Water Llanrwst WwTW Settled Storm Overflow River Conwy 31 234h -
Dwr Cymru Welsh Water Betws-Y-Coed WwTW Storm Overflow Afon Lliw 52 221h 45m -
Dwr Cymru Welsh Water Pendraw R Llan Glan Conwy Storm Overflow River Conwy 14 176h 15m -
Dwr Cymru Welsh Water Rock Terrace Storm Overflow River Ogwen 46 145h 45m -
Dwr Cymru Welsh Water Betws-Y-Coed Storm Overflow River Conwy 24 126h -
Dwr Cymru Welsh Water Dale Road Storm Overflow Conwy Bay 48 118h 41m -
Dwr Cymru Welsh Water Mill Road Betws-Y-Coed Storm Overflow Afon Lliw 13 116h 45m -
Dwr Cymru Welsh Water Tregarth Bron Ogwen Storm Overflow Afon Ogwen 7 109h -
Dwr Cymru Welsh Water Aber Storm Overflow Menai Strait 28 102h 30m -
Dwr Cymru Welsh Water Rowen WwTW Storm Overflow Afon Roe 29 84h -
Dwr Cymru Welsh Water Llanfairfechan Park Crescent Storm Overflow Afon Llanfairfechan 31 78h 42m -
Dwr Cymru Welsh Water Eglwysbach WwTW Storm Overflow River Hiraethlyn 5 69h 15m -
Dwr Cymru Welsh Water Tyn-y-Groes WwTW Storm Overflow River Conwy 15 62h 8m -
Dwr Cymru Welsh Water Llanrwst WwTW Storm Overflow River Conwy 27 55h 45m -
Dwr Cymru Welsh Water Llangernyw WwTW Overflow Elwy 9 53h 45m -
Dwr Cymru Welsh Water Cerrigydrudion WwTW Storm Overflow Afon Nug 9 32h 48m -
Dwr Cymru Welsh Water Penrhyn-Isaf Road Penrhyn Bay Storm Overflow Penrhyn Bay 27 31h 31m -
Dwr Cymru Welsh Water Glanwydden Storm Overflow Afon Wydden 3 23h 15m -
Dwr Cymru Welsh Water Llanfairfechan No 1 Storm Overflow Afon Llanfairfechan 12 19h 40m -
Dwr Cymru Welsh Water Gwydyr Road Dolgarrog Storm Overflow River Conwy 6 19h 27m -
Dwr Cymru Welsh Water Morfa Road Penrhyn Bay Storm Overflow Coastal Waters - Penrhyn Bay 5 18h 53m -
Dwr Cymru Welsh Water Betws-Y-Coed Pentre Ddu Storm Overflow Afon Lliw 3 8h 57m -
Dwr Cymru Welsh Water Marine Crescent Deganwy Storm Overflow Estuarial Waters of the River Conwy 7 8h 45m -
Dwr Cymru Welsh Water Tan Y Ffordd Dolgarrog Storm Overflow River Conwy 5 6h 45m -
Dwr Cymru Welsh Water Trefriw Main Storm Overflow River Conwy 8 6h 15m -
Dwr Cymru Welsh Water Llandudno West Shore Storm Overflow Conwy Bay 3 5h -
Dwr Cymru Welsh Water Maes Bleddyn Storm Overflow Tributary of Afon Ogwen 3 4h 31m -
Dwr Cymru Welsh Water Betws-Y-Coed Muriau Storm Overflow River Conwy 1 2h 15m -
Dwr Cymru Welsh Water Dolwyddelan Storm Overflow Afon Lledr 4 2h 6m -
Dwr Cymru Welsh Water Llandudno Junction Glan-Y-Mor Road Storm Overflow Estuarial Waters of the River Conwy 3 2h -
Dwr Cymru Welsh Water Llanllechid Overflow Afon-y-Llan 1 1h 30m -
Dwr Cymru Welsh Water Penmaenmawr WwTW Overflow Conwy Bay 2 1h 30m -
Dwr Cymru Welsh Water Conwy Gyffin Storm Overflow River Conwy 2 0h 45m -
Dwr Cymru Welsh Water Treborth Bangor WwTW Overflow Menai Strait 1 0h 30m -
Dwr Cymru Welsh Water TalyBont WwTW Storm Overflow Afon Ogwen 1 0h 15m -
Dwr Cymru Welsh Water Beach Road Bangor Storm Overflow Menai Strait 1 0h 15m -
Dwr Cymru Welsh Water Tremarl Llandudno Junction Overfow Unname Watercourse 1 0h 15m -
Dwr Cymru Welsh Water Pentrefoelas WwTW Storm Overflow Afon Merddwr 1 0h 15m -
Dwr Cymru Welsh Water Pentre Felin Betws Y Coed Overflow Afon Lliw 0 0h -
Dwr Cymru Welsh Water Coleg Normal Overflow Menai Strait 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Penaenmawr Station Storm Overflow Coastal waters via a culvert 0 0h -
Dwr Cymru Welsh Water Ganol Overflow Afon Ganol 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Meirion Road Storm Overflow Estuarial Waters 0 0h -
Dwr Cymru Welsh Water Morfa Drive Conwy Storm Overflow River Conwy 0 0h -
Dwr Cymru Welsh Water Llandudno Road Penrhyn Bay Storm Overflow Afon Ganol 0 0h -
Dwr Cymru Welsh Water Hendre Road Conwy Storm Overflow Afon Gyffin 0 0h -
Dwr Cymru Welsh Water Pentre Llanrhaeadr Storm Overflow Nant Mawr 0 0h -
Dwr Cymru Welsh Water Penrhyn Hill Storm Overflow Coastal Waters - Penrhyn Bay 0 0h -
Dwr Cymru Welsh Water B5382 Llangernyw Storm Overflow River Elwy 0 0h -
Dwr Cymru Welsh Water Deganwy Deganwy Road Storm Overflow Conwy Estuary 0 0h -
Dwr Cymru Welsh Water Rhostrehwfa Storm Overflow River Cledwen 0 0h -
Dwr Cymru Welsh Water Glan Traeth Bangor Overflow Afon Cegin 0 0h -
Dwr Cymru Welsh Water Llanfair Talhaiarn WwTW Storm Overflow River Elwy 0 0h -
Dwr Cymru Welsh Water Near Penmaenmawr Dwygyfylchi Storm Overflow Afon Gyrach 0 0h -
Dwr Cymru Welsh Water Marl Drive Llandudno Storm Overflow Afon Wydden 0 0h -
Dwr Cymru Welsh Water Llanrwst Storm Overflow River Conwy 0 0h -
Dwr Cymru Welsh Water Gorad Road Bangor Storm Overflow Menai Strait 0 0h -
Dwr Cymru Welsh Water King Georges Field Overflow Culvert to Bangor Mud Flats 0 0h -
Dwr Cymru Welsh Water Llansannan Storm Overflow River Aled 0 0h -
Dwr Cymru Welsh Water Tan-y-Fedw Trefriw Storm Overflow Afon Crafnant 0 0h -
Dwr Cymru Welsh Water Llandudno Road Penrhyn Bay Overflow Afon Ganol East 0 0h -
Dwr Cymru Welsh Water Conwy Harbour Overflow River Conwy 0 0h -
Dwr Cymru Welsh Water Waterloo Bridge Storm Overflow River Conwy 0 0h -
Dwr Cymru Welsh Water Lower Gate Street Conwy Storm Overflow River Conwy Estuary 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Glan Y Mor Road Deganwy Tywyn Storm Overflow River Conwy 0 0h -
Dwr Cymru Welsh Water Penmaenmawr Promenade Storm Overflow Coastal Waters - Penmaenmawr 0 0h -
Dwr Cymru Welsh Water Mill Hill Storm Overflow Afon Gyffin 0 0h -
Dwr Cymru Welsh Water Betws-Yn-Rhos Recreation Ground Storm Overflow River Dulas 0 0h -
Dwr Cymru Welsh Water Hill View Road Llanrhos Storm Overflow Unnamed Ditch 0 0h -
Dwr Cymru Welsh Water Llandudno Conway Road Storm Overflow Afon Wydden 0 0h -
Dwr Cymru Welsh Water Bangor Beach Road Overflow Menai Strait 0 0h -
Dwr Cymru Welsh Water Nebo Road Llanrwst Storm Overflow Afon Nant-y-Goron 0 0h -
Dwr Cymru Welsh Water Ganol Disinfected Overflow Afon Ganol 0 0h -
Dwr Cymru Welsh Water Biwla Storm Overflow Nant Garreg Ddu 0 0h -

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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Analysing sewage pollution by the Water Industry

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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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