Top of the Poops | Constituency Sewage Map - Live Data| Dwyfor Meirionnydd

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Dwyfor Meirionnydd 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.

Totals for Dwyfor Meirionnydd in 2026

Sewage43,449 hours

Monitoring offline0 hours

Potential pollution0 hours

Storm overflows195

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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Llanaelhaearn WwTW Overflow	Unnamed Watercourse	195	3,043h 10m	-
Dwr Cymru Welsh Water	Beddgelert WwTW Storm Overflow	River Glaslyn	162	2,756h 52m	-
Dwr Cymru Welsh Water	Llangybi WwTW Overflow	River Erch	120	2,424h 11m	-
Dwr Cymru Welsh Water	Llan Ffestiniog WwTW Inlet Storm Overflow	Nant Brisgyll	215	2,319h 41m	-
Dwr Cymru Welsh Water	Abererch WwTW Storm Overflow	River Erch	94	1,977h 34m	-
Dwr Cymru Welsh Water	Blaenau Ffestiniog WwTW Point 1 Storm Overflow	Afon Goedol	112	1,916h 30m	-
Dwr Cymru Welsh Water	Llanrug WwTW Storm Overflow	Afon Seiont	126	1,895h 52m	-
Dwr Cymru Welsh Water	Four Crosses WwTW Storm Overflow	River Erch	144	1,470h 43m	-
Dwr Cymru Welsh Water	Bethel Storm Overflow	Tributary of Afon Cadnant	96	1,350h 44m	-
Dwr Cymru Welsh Water	Llithfaen WwTW Storm Overflow	Rhyd Hir	73	1,184h 29m	-
Dwr Cymru Welsh Water	Chwilog WwTW Storm Overflow	Afon Wen	95	1,180h 24m	-
Dwr Cymru Welsh Water	Efailnewydd WwTW Storm Overflow	Unnamed Tributary of the Afon Rhyd Hir	130	1,156h 52m	-
Dwr Cymru Welsh Water	Fairbourne WwTW Storm Overflow	Coastal Waters	60	1,001h 56m	-
Dwr Cymru Welsh Water	Trefor WwTW Relief Discharge Point Storm Overflow	Unnamed Watercourse	99	957h 9m	-
Dwr Cymru Welsh Water	Station Road Pontrhythallt Storm Overflow	River Seiont	102	951h 49m	-
Dwr Cymru Welsh Water	Corwen WwTW Storm Overflow	River Dee	72	810h 14m	-
Dwr Cymru Welsh Water	Llanberis WwTW Storm Overflow	Afon y Bala	122	772h 43m	-
Dwr Cymru Welsh Water	Nefyn Storm Overflow	Caernarfon Bay	77	771h 42m	-
Dwr Cymru Welsh Water	Criccieth WwTW Storm Overflow	Tremadog Bay	56	702h 59m	-
Dwr Cymru Welsh Water	Waunfawr WwTW Storm Overflow	Afon Gwyrfai	64	691h 32m	-
Dwr Cymru Welsh Water	Llanllyfni WwTW Storm Overflow	River Llynfi	87	675h 59m	-
Dwr Cymru Welsh Water	Llanelltyd Storm Overflow	River Mawddach	47	641h 20m	-
Dwr Cymru Welsh Water	Llandrillo Storm Overflow	Afon Ceidiog	65	604h 49m	-
Dwr Cymru Welsh Water	Garndolbenmaen WwTW Storm Overflow	Afon Dwyfor	69	540h 27m	-
Dwr Cymru Welsh Water	Llan Ffestiniog WwTW Settled Storm Overflow	Nant Brisgyll	71	520h 10m	-
Dwr Cymru Welsh Water	Bontddu WwTW Storm Overflow	Afon Cwmllechen	68	477h 35m	-
Dwr Cymru Welsh Water	B4418 Caernarfon Storm Overflow	River Llynfi	48	473h 40m	-
Dwr Cymru Welsh Water	Llanystumdwy WwTW Settled Storm Overflow	Dwyfor River	59	471h 13m	-
Dwr Cymru Welsh Water	Pencefn Road Tanygrisiau Storm Overflow	Afon Goedol	63	429h 36m	-
Dwr Cymru Welsh Water	Talysarn Gas Works Storm Overflow	Unnamed Tribuatary of Afon Llyfni	58	385h 13m	-
Dwr Cymru Welsh Water	Dolgellau WwTW Storm Overflow	River Mawddach	35	375h 30m	-
Dwr Cymru Welsh Water	Pentrefelin WwTW Storm Overflow	Afon Cedron	56	366h 57m	-
Dwr Cymru Welsh Water	Stad Hafod Deiniolen Storm Overflow	Afon Caledffrwd	82	328h 49m	-
Dwr Cymru Welsh Water	Cwm Bowydd Blaenau Ffestiniog Storm Overflow	Afon Bowydd	58	308h 17m	-
Dwr Cymru Welsh Water	Aberdyfi Storm Overflow	River Dyfi	25	303h 34m	-
Dwr Cymru Welsh Water	Nefyn WwTW Inlet PS (Discharge Point A) Storm Overflow	Afon Geirch	50	296h 20m	-
Dwr Cymru Welsh Water	Corris WwTW Storm Overflow	Afon Dulas	46	293h 49m	-
Dwr Cymru Welsh Water	Maentwrog WwTW Storm Overflow	River Dwyryd	39	293h 29m	-
Dwr Cymru Welsh Water	Llanfaglan WwTW Storm Overflow	Afon Gwyrfai	46	269h 12m	-
Dwr Cymru Welsh Water	Bronaber WwTW Storm Overflow	River Eden	35	257h 48m	-
Dwr Cymru Welsh Water	Llanuwchllyn WwTW Overflow	Afon Twrch	64	245h	-
Dwr Cymru Welsh Water	Congl Y Wal Blaenau Ffestiniog Storm Overflow Storm Overflow	Afon Ceunant Sych	37	244h 55m	-
Dwr Cymru Welsh Water	Gellilydan WwTW Settled Storm Overflow	Tributary of the Afon Tafarn Helyg	42	227h 26m	-
Dwr Cymru Welsh Water	Penisarwaun WwTW Storm Overflow	Afon Seiont	73	205h 51m	-
Dwr Cymru Welsh Water	Llannor WwTW Storm Overflow	Afon Rhyd Hir	50	201h 40m	-
Dwr Cymru Welsh Water	Penmaenpool Bridge Storm Overflow	River Mawddach	18	201h 36m	-
Dwr Cymru Welsh Water	Talysarn Bridge Storm Overflow	Unnamed Tribuatary of Afon Llyfni	47	201h 24m	-
Dwr Cymru Welsh Water	Penrhyndeudraeth WwTW Settled Storm Overflow	River Dwyryd	26	185h 45m	-
Dwr Cymru Welsh Water	Cambrian View Penrhyndeudraeth Storm Overflow	Tributary of Afon Dwyryd	34	183h 55m	-
Dwr Cymru Welsh Water	Cynwyd WwTW Storm Overflow	River Dee	50	183h 6m	-
Dwr Cymru Welsh Water	Bala WwTW Storm Overflow	River Dee	15	168h 45m	-
Dwr Cymru Welsh Water	Barmouth WwTW Long Sea Storm Overflow	Cardigan Bay	87	148h 39m	-
Dwr Cymru Welsh Water	Tywyn WwTW Settled Storm Overflow	Coastal Water - Cardigan Bay	49	144h 16m	-
Dwr Cymru Welsh Water	Church Street Llanuwchllyn Storm Overflow	River Dee	16	136h 58m	-
Dwr Cymru Welsh Water	Lôn Goch Edern Storm Overflow	Afon Geirch	24	136h 15m	-
Dwr Cymru Welsh Water	Llanllyfni Glan Aber Storm Overflow	River Loughor	50	126h 56m	-
Dwr Cymru Welsh Water	Dyffryn Ardudwy WwTW Storm Overflow	Ardudwy Marsh Main Drain	21	126h 14m	-
Dwr Cymru Welsh Water	Tywyn WwTW Storm Overflow	Dysynni Low Level Drainage Channel	45	124h 35m	-
Dwr Cymru Welsh Water	East Bank Afon Glaslyn Beddgelert Storm Overflow	River Glaslyn	25	122h 59m	-
Dwr Cymru Welsh Water	Outside Corwen WwTW Storm Overflow	Unnamed Stream	14	108h 9m	-
Dwr Cymru Welsh Water	Snowdon Street Storm Overflow	Cyt Bach	29	106h 46m	-
Dwr Cymru Welsh Water	Castell Arthog Storm Overflow	Unnamed Watercourse	14	102h 49m	-
Dwr Cymru Welsh Water	Caernarfon WwTW Storm Tank Storm Overflow	Afon Seiont	14	102h 42m	-
Dwr Cymru Welsh Water	Llanwnda Storm Overflow	Rhyd	27	99h 22m	-
Dwr Cymru Welsh Water	Criccieth East Overflow	Tremadog Bay	13	96h 11m	-
Dwr Cymru Welsh Water	Caernarfon Hen Gastell Storm Overflow	Afon Carrog	35	95h 43m	-
Dwr Cymru Welsh Water	Caernarfon WwTW Storm Overflow	Afon Seiont - Lower	48	89h 50m	-
Dwr Cymru Welsh Water	South of River Bontnewydd Storm Overflow	Afon Gwyrfai	45	81h 59m	-
Dwr Cymru Welsh Water	Rhiwlas WwTW Storm Overflow	Afon Cegin	49	80h 37m	-
Dwr Cymru Welsh Water	Trawsfynydd WwTW Storm Overflow	Afon Prysor	20	78h 45m	-
Dwr Cymru Welsh Water	Heulfryn Llanfaglan Storm Overflow	Afon Carrog	40	71h 47m	-
Dwr Cymru Welsh Water	Brynrefail Main Storm Overflow	Afon Caledffrwd	19	71h 10m	-
Dwr Cymru Welsh Water	Dolgellau Marian Mawr Storm Overflow	River Wnion	45	67h 13m	-
Dwr Cymru Welsh Water	Mynytho WwTW Storm Overflow	Unnamed Watercourse	44	63h 43m	-
Dwr Cymru Welsh Water	Nefyn WwTW Settled Storm Overflow	Unnamed Tributary of Afon Geirch	16	55h 50m	-
Dwr Cymru Welsh Water	Mill Lane Caernarfon Storm Overflow	Afon Cadnant	44	55h 8m	-
Dwr Cymru Welsh Water	Glanrafon Bontnewydd Storm Overflow	Afon Gwyrfai	17	49h 36m	-
Dwr Cymru Welsh Water	Caernarfon Seiont Bridge Storm Overflow	River Seiont	6	46h 29m	-
Dwr Cymru Welsh Water	Point B Nefyn WwTW Inlet Storm Overflow	River Ceirch	21	42h 25m	-
Dwr Cymru Welsh Water	Talsarnau WwTW Storm Overflow	Unnamed Watercourse	25	41h 40m	-
Dwr Cymru Welsh Water	Pontllyfni No 3 Storm Overflow	River Llyfni	8	39h 59m	-
Dwr Cymru Welsh Water	Llanberis Maes Padarn Storm Overflow	Goch Bach	15	39h 44m	-
Dwr Cymru Welsh Water	West Parade Criccieth Overflow	Tremadog Bay	12	37h 59m	-
Dwr Cymru Welsh Water	Gimblet Rock Storm Overflow	River Erch	4	37h 50m	-
Dwr Cymru Welsh Water	Clynnog Fawr Storm Overflow	Unnamed Stream	24	37h 12m	-
Dwr Cymru Welsh Water	Bryncir WwTW Storm Overflow	Afon Blaen-y-cae	16	35h 44m	-
Dwr Cymru Welsh Water	Y Maes Pwllheli Storm Overflow	Estuarial Waters of Afon Rhyd Hir	10	33h 33m	-
Dwr Cymru Welsh Water	Maes Gwyndy Trawsfynydd Storm Overflow	Afon Prysor	27	28h 47m	-
Dwr Cymru Welsh Water	Llanystumdwy WwTW Storm Overflow	Dwyfor River	13	28h 45m	-
Dwr Cymru Welsh Water	Llwyn-y-gwalch Storm Overflow	Afon Llifon	23	27h 40m	-
Dwr Cymru Welsh Water	Harlech Main High Level Storm Overflow	Unnamed Watercourse	5	26h 56m	-
Dwr Cymru Welsh Water	Bron Castell Storm Overflow	Unnamed Watercourse	6	25h 1m	-
Dwr Cymru Welsh Water	Minffordd Street Corris Storm Overflow	River Deri	2	24h 30m	-
Dwr Cymru Welsh Water	Borth-Y-Gest Storm Overflow	River Glaslyn	15	22h 7m	-
Dwr Cymru Welsh Water	Taleymerau Pwllheli Storm Overflow	Afon Rhyd Hir	14	22h 7m	-
Dwr Cymru Welsh Water	Rhosgadfan Storm Overflow	Gwyrfai	16	21h 45m	-
Dwr Cymru Welsh Water	Aberdesach Storm Overflow	Afon Desach	24	21h 8m	-
Dwr Cymru Welsh Water	Morfa Bychan WwTW Storm Overflow	Coastal Waters	19	20h 45m	-
Dwr Cymru Welsh Water	Nantlle No 5 Caernarfon Storm Overflow	Llyn Nantlle Uchaf	12	18h 27m	-
Dwr Cymru Welsh Water	Abergynolwyn WwTW Storm Overflow	River Dysynni	14	17h 56m	-
Dwr Cymru Welsh Water	B4419 Caernarfon Storm Overflow	Menai Strait	21	17h 56m	-
Dwr Cymru Welsh Water	Maentwrog Storm Overflow	River Dwyryd	18	17h 42m	-
Dwr Cymru Welsh Water	Idris Villas to NRA Storm Overflow	Ditch	15	17h 15m	-
Dwr Cymru Welsh Water	Llwyngwril Storm Overflow	Coastal Waters - Barmouth Bay	6	16h 35m	-
Dwr Cymru Welsh Water	Marian Mawr Dolgellau Storm Overflow	Ffos Ddu	7	15h 1m	-
Dwr Cymru Welsh Water	Fford Morfa Bychan Storm Overflow	Tributary of Afon Glaslyn	25	14h 36m	-
Dwr Cymru Welsh Water	Porthmadog WwTW Site Drainage Overflow	Glaslyn Estuary	9	14h 30m	-
Dwr Cymru Welsh Water	Glanypwll Road Storm Overflow	Afon Barlwyd	6	13h 15m	-
Dwr Cymru Welsh Water	Barmouth WwTW Short Sea Storm Overflow	Cardigan Bay	13	13h	-
Dwr Cymru Welsh Water	Pen Y Cefn Road Storm Overflow	River Wnion	17	12h 41m	-
Dwr Cymru Welsh Water	Carmel Groeslon Fields Storm Overflow	Afon Llifon	12	12h 26m	-
Dwr Cymru Welsh Water	Penygroes Storm Overflow	River Llynfi	11	11h 44m	-
Dwr Cymru Welsh Water	Dôl Eilian Llanberis Storm Overflow	Afon Hwch	12	11h 26m	-
Dwr Cymru Welsh Water	Alyn Road Fairbourne Storm Overflow	Afon Henddol	3	10h 45m	-
Dwr Cymru Welsh Water	Afonwen WwTW Storm Overflow	Afon Wen	3	9h 37m	-
Dwr Cymru Welsh Water	Esplanade Criccieth Storm Overflow	Tremadog Bay	3	9h 14m	-
Dwr Cymru Welsh Water	Tan Y Buarth Bethel Storm Overflow	Afon Cadnant	8	7h 29m	-
Dwr Cymru Welsh Water	Penrhos Camp WwTW Storm Overflow	Afon Penrhos	10	6h 37m	-
Dwr Cymru Welsh Water	Margret Street Storm Overflow	Afon Cadnant	6	5h 32m	-
Dwr Cymru Welsh Water	North Western Road Blaenau Ffestiniog Overflow	Afon Goedol	5	5h 12m	-
Dwr Cymru Welsh Water	Tremadog Iscraig Storm Overflow	Y Cyt	2	5h	-
Dwr Cymru Welsh Water	Tregof Bethel Storm Overflow	Afon Cadnant	3	4h 15m	-
Dwr Cymru Welsh Water	Llanegryn Street Storm Overflow	River Dysynni	7	4h	-
Dwr Cymru Welsh Water	East Llanelltyd Storm Overflow	River Mawddach	2	3h 58m	-
Dwr Cymru Welsh Water	Caernarfon WwTW Inlet Storm Overflow	River Seiont	3	3h 30m	-
Dwr Cymru Welsh Water	North of River Bontnewydd Storm Overflow	Afon Gwyrfai	8	3h 15m	-
Dwr Cymru Welsh Water	Caernarfon Llanbeblig Road Storm Overflow	Afon Seiont	5	3h 13m	-
Dwr Cymru Welsh Water	Llanfachreth WwTW Storm Overflow	Afon y Llan	11	2h 54m	-
Dwr Cymru Welsh Water	Aberdaron Storm Overflow	Afon Daron	3	2h 44m	-
Dwr Cymru Welsh Water	Trefor Storm Overflow	Unnamed Stream	3	2h 43m	-
Dwr Cymru Welsh Water	Fronwynion Street Trawsfynydd Storm Overflow	Afon Prysor	1	2h 30m	-
Dwr Cymru Welsh Water	Stryd Y Felin Storm Overflow	Unnamed Watercourse	4	2h 28m	-
Dwr Cymru Welsh Water	Barmouth Harbour Storm Overflow	Mawddach Estuary	4	2h 15m	-
Dwr Cymru Welsh Water	Arthog Terrace Storm Overflow	Unnamed Watercourse	1	2h 15m	-
Dwr Cymru Welsh Water	Hen Gei Llechi Felinheli Main Overflow	Menai Strait	2	2h 14m	-
Dwr Cymru Welsh Water	Llanberis Road Storm Overflow	Afon Cadnant	5	2h 13m	-
Dwr Cymru Welsh Water	Aberdaron WwTW Storm Overflow	Afon Cylch-y-Felin	2	2h	-
Dwr Cymru Welsh Water	Friogg Storm Overflow	Unnamed Watercourse	3	1h 31m	-
Dwr Cymru Welsh Water	Ffordd Penllach Storm Overflow	Unnamed Stream	3	1h 29m	-
Dwr Cymru Welsh Water	Market Street Llanberis Storm Overflow	Llyn Padarn	1	1h 26m	-
Dwr Cymru Welsh Water	Llanbedrog Long Nant-Iago Storm Overflow	Tremadog Bay	2	1h	-
Dwr Cymru Welsh Water	Llwyn Y Gell Road Ffestiniog Storm Overflow	Barlwydd	2	0h 58m	-
Dwr Cymru Welsh Water	Porthmadog WwTW Tank Overflow	Glaslyn Estuary	1	0h 53m	-
Dwr Cymru Welsh Water	Mawddach Crescent Storm Overflow	Mawddach Estuary	1	0h 44m	-
Dwr Cymru Welsh Water	A470 A4212 Junction Storm Overflow	Unnamed Stream	1	0h 30m	-
Dwr Cymru Welsh Water	Llandanwg Station Storm Overflow	Tremadog Bay	1	0h 30m	-
Dwr Cymru Welsh Water	Bryncoch Storm Overflow	Unnamed Watercourse	1	0h 30m	-
Dwr Cymru Welsh Water	Lombard Street Bank Place Porthmadog Storm Overflow	Unnamed Stream	2	0h 29m	-
Dwr Cymru Welsh Water	West Parade Criccieth Storm Overflow	Tremadog Bay	1	0h 26m	-
Dwr Cymru Welsh Water	Tai Craig Y Don Cwm Y Glo Storm Overflow	Unknown	1	0h 22m	-
Dwr Cymru Welsh Water	Chandlers Place Porthmadog Storm Overflow	Nant Y Cyt	1	0h 15m	-
Dwr Cymru Welsh Water	Glasfryn Terrace Storm Overflow	Unnamed Watercourse	1	0h 14m	-
Dwr Cymru Welsh Water	Pontllyfni STW Storm Overflow	River Llyfni	0	0h	-
Dwr Cymru Welsh Water	Beach Bank Criccieth Storm Overflow	Culverted stream which crosses Criccieth Beach	0	0h	-
Dwr Cymru Welsh Water	Abererch Road Crossing Storm Overflow	River Erch	0	0h	-
Dwr Cymru Welsh Water	Crown Street Caernarfon Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	Bryncrug Overflow	Afon Fathew	0	0h	-
Dwr Cymru Welsh Water	St. Mary's Terrace Storm Overflow	Unnamed Watercourse	0	0h	-
Dwr Cymru Welsh Water	Glan Y Mor Felinheli Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Morfa Bychan WwTW High-level Storm Overflow	Unnamed Stream	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Harlech Storm Overflow	Tributary of Afon Dwyryd	0	0h	-
Dwr Cymru Welsh Water	Waterloo Port Road Storm Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	The Square Blaenau Ffestiniog Storm Overflow	Afon Bowydd	0	0h	-
Dwr Cymru Welsh Water	Chapel Street Porthmadog Storm Overflow	Nant Y Cyt	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Castle Ditch Storm Overflow	Afon Seiont	0	0h	-
Dwr Cymru Welsh Water	Porthmadog WwTW Final Effluent Overflow	Glaslyn Estuary within Glaslyn Marshes	0	0h	-
Dwr Cymru Welsh Water	Bank Quay Caernarfon Storm Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	Afon Angell Bridge Aberangell Storm Overflow	Afon Angell	0	0h	-
Dwr Cymru Welsh Water	Llandanwg Storm Overflow	Tremadog Bay	0	0h	-
Dwr Cymru Welsh Water	A496 Llanbedr Storm Overflow	Culvert to Afon Artro	0	0h	-
Dwr Cymru Welsh Water	Amanda Terrace Storm Overflow	River Glaslyn Estuary	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Porthmadog Britannia Place Storm Overflow	River Glaslyn	0	0h	-
Dwr Cymru Welsh Water	Ysgoldy Storm Overflow	Afon Cadnant	0	0h	-
Dwr Cymru Welsh Water	Balaclava Road Caernarfon Storm Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	Abersoch Harbour Storm Overflow	Afon Soch Estuary	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Clwt-y-bont Storm Overflow	Afon Caledffrwd	0	0h	-
Dwr Cymru Welsh Water	Blaenau Ffestiniog WwTW Point 2 Storm Overflow	Afon Bowydd	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Bridge on A499 Pontllyfni Overflow	River Llyfni	0	0h	-
Dwr Cymru Welsh Water	Glan-Y-Don Pwllheli Storm Overflow	River Erch	0	0h	-
Dwr Cymru Welsh Water	Rhedyw Road Llanllyfni Overflow	River Llynfi	0	0h	-
Dwr Cymru Welsh Water	Wesleyan Terrace Storm Overflow	Unnamed Watercourse	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Port Terrace Felinheli Overflow	Menai Strait	0	0h	-
Dwr Cymru Welsh Water	Corwen Clawdd Poncefn Storm Overflow	Tributary of River Dee	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Northern Terrace Corwen Storm Overflow	River Dee	0	0h	-
Dwr Cymru Welsh Water	Llanbedr WwTW Storm Overflow	Afon Artro	0	0h	-

Dwyfor Meirionnydd - Live Sewage

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