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March for Clean Water

Bangor Aberconwy was polluted by sewage 5,108 times in 2023
lasting 50,687 hours - that's 5.87 years!
- but monitoring was disabled in some locations, so could be more

Select the constituency from the drop-down

Constituency

✔ means we have experimental daily data since 2023

Totals for Bangor Aberconwy in 2023

80 Sites polluted by Dwr Cymru Welsh Water

5,108 sewage dumps
50,687 h duration

That's 5.87 years! On average 14 times a day

Change Over Time

Take Action

Your local MP is Claire Hughes (Labour) - Find out more about their interests, donors, and voting at They Work For You

Constituencies near Bangor Aberconwy

Waterways in Bangor Aberconwy

Pollution Summary 2023

Here are all the reported sewage overflow totals for Bangor Aberconwy in 2023. 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 2 of the total 87 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Llugwy	Capel Curig Sd.Scheme CSO	237	4,677	100
Dwr Cymru Welsh Water	River Lledr	Screened Storm Sewage at Dolwyddelan WwTW	203	4,306	99.7
Dwr Cymru Welsh Water	Unnamed Ditch	Cwm Penmachno - CSO	194	3,867	98.6
Dwr Cymru Welsh Water	River Ogwen	Settled Storm Overflow at Tregarth Wastewater Treatment Works	185	3,556	100
Dwr Cymru Welsh Water	Coastal Waters Of Conwy Bay	PENMAENMAWR WWTW PENMAENMAWR	201	3,100	100
Dwr Cymru Welsh Water	River Dulyn	Dolgarrog CSO No. 2	170	2,905	100
Dwr Cymru Welsh Water	River Dulas	Settled Storm Overflow at Betws-yn-Rhos Wastewater Treatment Works	147	2,780	100
Dwr Cymru Welsh Water	River Crafnant	SPS at Trefriw STW	132	2,168	100
Dwr Cymru Welsh Water	River Llugwy	Mill Rd SPS	111	1,986	100
Dwr Cymru Welsh Water	River Clwyd	Settled Storm Sewage at Pwllglas WwTW	96	1,695	100
Dwr Cymru Welsh Water	Coastal Waters Of Penrhyn Bay	GANOL WWTW (STW) GLAN CONWY CORNER	330	1,676	99.8
Dwr Cymru Welsh Water	River Elwy	LLANFAIRTALHAIARN STW (STORM)	100	1,560	100
Dwr Cymru Welsh Water	River Ogwen	BETHESDA STW (FINAL) BETHESDA	124	1,294	100
Dwr Cymru Welsh Water	River Wydden	GLANWYDDAN PUMPING STATION	75	952	96.6
Dwr Cymru Welsh Water	Menai Strait	Treborth WwTW (Settled Storm)	99	939	99.2
Dwr Cymru Welsh Water	Conwy Estuary	GLAN CONWY SPS	61	936	97.2
Dwr Cymru Welsh Water	Conwy Bay	DALE ROAD STORM SPS LLANDUDNO	258	935	99.9
Dwr Cymru Welsh Water	River Machno	LLAN PENMACHNO STW SCREENED CSO	85	870	99.7
Dwr Cymru Welsh Water	River Nug	CSO at Cerrigydrudion WwTW	135	863	97.8
Dwr Cymru Welsh Water	River Hiraethlyn	Settled Storm Overflow at Eglwysbach Wastewater Treatment Works	36	776	100
Dwr Cymru Welsh Water	River Hiraethlyn	EGLWYSBACH STW	58	774	100
Dwr Cymru Welsh Water	Cfgin	GLASINFRYN SPS CSO	87	760	99.9
Dwr Cymru Welsh Water	Menai Strait	ABERGWYNGREGYN PUMPING STATION	30	664	99.9
Dwr Cymru Welsh Water	River Roe	CSO at Rowen STW	138	602	99.9
Dwr Cymru Welsh Water	River Conwy	Settled Storm Storage at Llanrwst STW Llanwrst Conwy	57	592	99.8
Dwr Cymru Welsh Water	River Conwy	SPS at Llanrwst STW Llanrwst Conwy	120	476	99.8
Dwr Cymru Welsh Water	River Ogwen	Rock Terrace CSO Bethesda	70	467	97.1
Dwr Cymru Welsh Water	River Ogwen	Fron Ogwen PS	69	419	95
Dwr Cymru Welsh Water	River Conwy	Waterloo SPS	39	407	100
Dwr Cymru Welsh Water	River Ogwen	BETHESDA WWTW STORM	60	392	100
Dwr Cymru Welsh Water	River Llugwy	Pentre Ddu CSO, Betws-y-Coed	46	322	92.6
Dwr Cymru Welsh Water	River Lledr	CSO & SPS Nr 2250 Dolwyddlean	45	274	97.6
Dwr Cymru Welsh Water	River Conwy	Dolgarreg Tan Y Fford SPS	46	272	99.3
Dwr Cymru Welsh Water	River Nant-Y-Goron	BRYN AFON CSO	197	199	99.5
Dwr Cymru Welsh Water	Penrhyn Bay Via Surface Water Sewer	CSO at Penrhyn Isaf Road	99	197	88.8
Dwr Cymru Welsh Water	Penrhyn Bay	PENRHYN BAY PS MORFA RD PENRHYN BAY	35	195	97.8
Dwr Cymru Welsh Water	River Conwy	Tan Y Fford CSO	140	194	99.3
Dwr Cymru Welsh Water	River Conwy	Betws y Coed Golf Club PS	9	193	2.6
Dwr Cymru Welsh Water	Llanfairfechan	LLANFAIRFECHAN - SSO	62	161	41
Dwr Cymru Welsh Water	Conwy Bay	WEST SHORE PS ABBEY ROAD LLANDUDNO	30	153	88.2
Dwr Cymru Welsh Water	River Conwy	DEGANWY PS MARINE CRESCENT DEGANWY	119	140	99.8
Dwr Cymru Welsh Water	River Clwyd	PWLLGLAS STW	74	134	100
Dwr Cymru Welsh Water	River Ogwen	RACHUB MAES BLEDDYN CSO	61	117	99.5
Dwr Cymru Welsh Water	River Conwy	CSO NEAR PS NO 2 TREFRIW	30	99	47.4
Dwr Cymru Welsh Water	Llanfairfechan	LLANFAIRFECHAN SSO NO. 1	54	94	98.9
Dwr Cymru Welsh Water	River Conwy	Betwys Y Coed Muriau P.S.	44	59	100
Dwr Cymru Welsh Water	River Conwy	LLANDUDNO JUNCTION PS	29	57	100
Dwr Cymru Welsh Water	River Wydden	MARL DRIVE CSO LLANDUDNO JUNCTION	7	45	100
Dwr Cymru Welsh Water	Menai Strait	BEACH ROAD PS BANGOR ,	54	42	100
Dwr Cymru Welsh Water	Unnamed Watercourse	Tan-y-Fedw CSO, Trefriw (MH No. 104)	7	32	99.9
Dwr Cymru Welsh Water	Menai Strait	TREBORTH STW (FINAL) BANGOR	15	28	99.3
Dwr Cymru Welsh Water	Unnamed Ditch	LLANDUDNO LLANRHOS SPS	11	25	99.8
Dwr Cymru Welsh Water	River Conwy	TYWYN PS	20	21	99.9
Dwr Cymru Welsh Water	Coastal Waters	PENMAENMAWR PROMENADE PS	15	19	99.9
Dwr Cymru Welsh Water	River Aled	Llansannan Ddol CSO	4	19	100
Dwr Cymru Welsh Water	Coastal Waters Via Sw Culvert	STATION ROAD CSO	16	19	100
Dwr Cymru Welsh Water	Unnamed Watercourse	IND ESTATE LLANDUDNO JUNCTION GLAN	2	18	98.5
Dwr Cymru Welsh Water	Menai Strait	Gorad Road SPS	27	18	100
Dwr Cymru Welsh Water	Conwy Estuary	DEGANWY ROAD DEGANWY	11	15	99.7
Dwr Cymru Welsh Water	Conwy Estuary	MORFA PS MORFA DRIVE MORFA CONWY	6	12	99.9
Dwr Cymru Welsh Water	River Ogwen	TALYBONT STW	6	12	100
Dwr Cymru Welsh Water	River Y Llan	LLANLLECHID SPS , ,	2	12	100
Dwr Cymru Welsh Water	River Conwy	QUAY PS CONWY QUAY CONWY	3	11	99.9
Dwr Cymru Welsh Water	River Conwy	Tyn Y Groes STW - Storm Overflow	5	9	99.8
Dwr Cymru Welsh Water	Un-Named Stream	PENRHYN BAY LLANDUNDNO ROAD -	5	9	99.8
Dwr Cymru Welsh Water	River Merddwr	Pentrefoelas - CSO	9	9	99.9
Dwr Cymru Welsh Water	Ganol	PENRHYN BAY LLANDUNDNO ROAD -	22	9	99.7
Dwr Cymru Welsh Water	Gyrach	PENMAENMAWR WWTW PENMAENMAWR	3	8	100
Dwr Cymru Welsh Water	Coastal Waters - Penrhyn Bay	PENRHYN HILL PENRHYN BAY	8	3	96
Dwr Cymru Welsh Water	Menai Strait	COLEG NORMAL SEWAGE PUMPING STATION	5	3	99.9
Dwr Cymru Welsh Water	Nant Mawr	Pentre Llanrhaedr PS	2	2	100
Dwr Cymru Welsh Water	A Culverted River Conwy	Llanwrst CSO	5	1	88.4
Dwr Cymru Welsh Water	Conway Bay	LLANFAIRFECHAN HOSPITAL SPS	1	1	100
Dwr Cymru Welsh Water	River Ganol	GANOL STW PS GLAN CONWY CORNER	4	1	99.6
Dwr Cymru Welsh Water	Elwy	Llangernyw SPS	1	0	100
Dwr Cymru Welsh Water	Estuarial Waters	Meirion Road PS (Storm/Emerg)	1	0	100
Dwr Cymru Welsh Water	Gyffin	ST. AGNES ROAD CSO	1	0	100
Dwr Cymru Welsh Water	River Wydden	WOODLANDS P.S WOODLANDS ESTATE MARL	1	0	100
Dwr Cymru Welsh Water	Unnamed Ditch	DEGANWY BEACH SPS	1	0	100
Dwr Cymru Welsh Water	Gyffin	HENDRE ROAD SSO	1	0	100
Dwr Cymru Welsh Water	Nant Garreg Ddu	GLAN Y MOR PUMPING STATION	0	0	0
Dwr Cymru Welsh Water	Nant Y Cefn	Settled Storm Overflow at Clawddnewydd Wastewater Treatment Works	0	0	99.8
Dwr Cymru Welsh Water	River Wydden	CONWY ROAD STORM PS	0	0	100
Dwr Cymru Welsh Water	River Dulas	CSO AT BETTWYS YN RHOS SPORTS GROUND	0	0	0
Dwr Cymru Welsh Water	River Llugwy	Betws y Coed WwTW Settled Storm	0	0	99.8
Dwr Cymru Welsh Water	River Cegin	GLAENTRAETH ESTATE PS BANGOR ,	0	0	99.7
Dwr Cymru Welsh Water	Estuarial Waters Of River Conwy	Gyffin PS Morfa Bach Conwy	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.

Analysing sewage pollution by the Water Industry

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