Alyn and Deeside

Polluted by sewage 1,543 times in 2024 lasting 7,439 hours

Monitoring was disabled in some locations, so could be more

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✔ means we have experimental daily data since 2023

Totals for Alyn and Deeside in 2024

46 Sites polluted by Dwr Cymru Welsh Water

1,543 sewage dumps

7,439 hours duration

That's 10.33 months. On average 4.2 times a day

Change Over Time

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Constituencies near Alyn and Deeside

Waterways in Alyn and Deeside

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Pollution Summary 2024

Here are all the reported sewage overflow totals for Alyn and Deeside 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 4 of the total 54 CSO locations had reporting enabled for less than half the year. Of these 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Foundry Drain	PADESWOOD ROAD STORM TANK CSO	91	985	99.9
Dwr Cymru Welsh Water	Higher Ferry Drain	BRETTON PS	83	912	99.9
Dwr Cymru Welsh Water	Black Brook, Brad Brook	Penyffordd Terminal SPS	77	598	99.9
Dwr Cymru Welsh Water	River Dee	Ashgrove PS Shotton	87	442	99.9
Dwr Cymru Welsh Water	Manor Drain	GARDEN CITY BRITISH LEGION - CSO	59	393	99.9
Dwr Cymru Welsh Water	Broughton Brook	Dobshill SPS	26	344	99.9
Dwr Cymru Welsh Water	River Dee Estuary	Settled Storm Sewage at Flint WwTW	51	307	99.9
Dwr Cymru Welsh Water	Balderton Brook	SANDY LANE SPS CELYN CRESCENT SALTN	108	305	98
Dwr Cymru Welsh Water	Un-Named Of Broughton Br	Lower Farm CSO, Drury	92	303	98.3
Dwr Cymru Welsh Water	Queensferry Ditch	MANCOT LANE CSO	38	302	99.9
Dwr Cymru Welsh Water	Broughton Brook	HAWARDEN WOOD LANE CSO	63	241	99.9
Dwr Cymru Welsh Water	River Dee	Higher Kinnerton SPS	39	234	99.8
Dwr Cymru Welsh Water	Unnamed W/C	FLINT IN GARDEN 102 MAES GWYN	80	181	89.2
Dwr Cymru Welsh Water	Un-Named Watercourse	QUEENSFERRY STW (SETTLED STORM)	30	178	100
Dwr Cymru Welsh Water	Pentre Ffwrdan Stream	Flint Mountain SPS	18	149	99.9
Dwr Cymru Welsh Water	Un-Named Of Byr Brook	Treuddyn Wastewater Treatment Works	39	146	99.9
Dwr Cymru Welsh Water	Golftyn Brook	Connahs Quay Golftyn PS CSO/Storm	38	141	98.6
Dwr Cymru Welsh Water	Pandy Brook,Tidal Dee	FLINT WWTW	16	140	100
Dwr Cymru Welsh Water	River Alyn	CAERGWRLE - RHYDDYN HILL ROAD CSO	49	128	99.9
Dwr Cymru Welsh Water	Dee Estuary	BAGILLT WEST SPS BAGILLT	45	128	99.9
Dwr Cymru Welsh Water	Black Brook	TY GWYN WWTW BUCKLEY	33	99	76
Dwr Cymru Welsh Water	Alyn	CEFN Y BEDD GWERN ALYN SPS	61	91	98.4
Dwr Cymru Welsh Water	Dee Estuary	BAGILLT EAST SPS	21	84	98.5
Dwr Cymru Welsh Water	River Dee Estuary	QUEENSFERRY WWTW	9	72	100
Dwr Cymru Welsh Water	Dee	FLINT DEE COTTAGES PS	33	72	99.9
Dwr Cymru Welsh Water	Byr Brook	Pont Y Bodkin Main SPS	17	67	99.9
Dwr Cymru Welsh Water	Wepre Brook	Connah's Quay Wepre PS	33	65	99.9
Dwr Cymru Welsh Water	New Inn Brook	BUCKLEY LIVERPOOL ROAD - SSO	27	46	99.9
Dwr Cymru Welsh Water	River Cegidog	CYMAU PUMPING STATION/CSO	29	40	99.9
Dwr Cymru Welsh Water	Alyn	HOPE WwTW	6	36	99.9
Dwr Cymru Welsh Water	Bretton Drain	BRETTON PS	5	31	98.8
Dwr Cymru Welsh Water	Alltami Brook	BUCKLEY SOUTHDOWN PARK PS	9	27	99.9
Dwr Cymru Welsh Water	Sandycroft Drain	Factory Road CSO, Sandycroft	6	26	79.6
Dwr Cymru Welsh Water	Unnamed Watercourse Flowing To River Dee	Cestrian St CSO	14	21	98.9
Dwr Cymru Welsh Water	Pentre Ffwrndan Drain	Oakenholt Main SPS	5	18	99.9
Dwr Cymru Welsh Water	Broughton Brook	Sandycroft Phoenix Street CSO	6	17	99.9
Dwr Cymru Welsh Water	River Alyn	HOPE SARN LANE CSO	36	16	98.3
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT STATION ROAD - SSO	12	14	98.3
Dwr Cymru Welsh Water	Byr Brook	Pont y Bodkin Lower PS	17	11	98.9
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT GREENACRE DRIVE - SSO	7	3	66.3
Dwr Cymru Welsh Water	River Dee	CONNAHS QUAY DEVA AVENUE - CSO	12	3	41.6
Dwr Cymru Welsh Water	River Dee	Connahs Quay Dock Road PS	3	2	99.8
Dwr Cymru Welsh Water	Pentre Drain	HAWARDEN CROSS TREE LANE - SSO	5	1	98.9
Dwr Cymru Welsh Water	River Cegidog	Ffrith SPS	3	1	99.9
Dwr Cymru Welsh Water	Pulford Brook	Powys Caer Estyn PS	4	1	99.8
Dwr Cymru Welsh Water	Unnamed Watercourse	Bagillt verge off Manor Drive CSO	1	0	98.6
Dwr Cymru Welsh Water	Balderton Brook	Saltney Bridge Street CSO	0	0	98.5
Dwr Cymru Welsh Water	Alyn	CAERGWRLE DERBY ROAD - SSO	0	0	0
Dwr Cymru Welsh Water	Black Brook Via Surface Water Drain	Pen Y Ffordd West View SPS	0	0	99.8
Dwr Cymru Welsh Water	Wepre Brook	Buckley (The Willows) SPS	0	0	97.8
Dwr Cymru Welsh Water	River Dee	Connahs Quay Linden Avenue - CSO	0	0	0
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT TYDDYN MESHAM LANE - SSO	0	0	20.9
Dwr Cymru Welsh Water	Unnamed Watercourse	MERLLYN LANE BAGILLT	0	0	67.4
Dwr Cymru Welsh Water	Wepre Brook	CONNAHS QUAY LOW LEVEL SPS STORM	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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Alyn and Deeside Polluted by sewage 1,543 times in 2024 lasting 7,439 hours Monitoring was disabled in some locations, so could be more

Alyn and Deeside