Delyn polluted by sewage 1,076 times in 2022 - lasting 4,662 hours

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✔ means we have experimental daily data for 2023

Totals for Delyn in 2022

54 Sites polluted by Dwr Cymru Welsh Water

1,076 sewage dumps
4,662 h duration

That's 6.47 months. On average 2.9 times a day

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Constituencies near Delyn

Waterways in Delyn

Pollution Summary 2022

Here are all the reported sewage overflow totals for Delyn in 2022. Sometimes sewage can be being dumped for months at a time.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Pentre Ffwrdan Stream	Flint Mountain SPS	73	976	100
Dwr Cymru Welsh Water	River Dee	MARSH FARM PUMPING STATION	42	516	99.7
Dwr Cymru Welsh Water	Northop Brook	Northop Wastewater Treatment Works Settled Storm	38	392	99.5
Dwr Cymru Welsh Water	River Alyn	Settled Storm Overflow at Mold Wastewater Treatment Works	47	368	99.9
Dwr Cymru Welsh Water	River Alun	Leeswood Transfer SPS	33	358	100
Dwr Cymru Welsh Water	River Dee Estuary	Settled Storm Sewage at Flint WwTW	39	266	100
Dwr Cymru Welsh Water	River Alyn	CSO at Mynydd Isa Wylfa Hill	54	148	100
Dwr Cymru Welsh Water	Gutter Fawr	LLANASA PS CSO / EO	21	146	100
Dwr Cymru Welsh Water	River Alyn	CSO Mynydd Isa Chambers Lane/Mercia Drive Nr 2	61	134	99.4
Dwr Cymru Welsh Water	Sw System	DISCHARGE B 14 FFORDD DDYFRDWY	11	120	99.4
Dwr Cymru Welsh Water	River Dee	PEN Y MAES PUMPING STATION	28	116	99.4
Dwr Cymru Welsh Water	Holywell Stream	GREENFIELD PARENT CSO HOLYWELL	70	110	97.7
Dwr Cymru Welsh Water	Wheeler	Nannerch SPS	25	109	97.5
Dwr Cymru Welsh Water	Nant Y Flint	PENTRE HALKYN SPS	12	104	100
Dwr Cymru Welsh Water	Ffynnongroew Drain	FFYNNON WEST PS	11	100	99
Dwr Cymru Welsh Water	S W Sewer	MYNYDD ISA WATS DYKE AVE PS	31	81	100
Dwr Cymru Welsh Water	Dee Estuary	BAGILLT WEST SPS BAGILLT	38	80	100
Dwr Cymru Welsh Water	Unnamed W/C	FLINT IN GARDEN 102 MAES GWYN	73	71	82.4
Dwr Cymru Welsh Water	Surface Water System	MYNYDD ISA MOLD ROAD/MERCIA DR CSO	38	58	97.5
Dwr Cymru Welsh Water	Pentre Ffwrndan Drain	Oakenholt Main SPS	9	53	99.8
Dwr Cymru Welsh Water	Stream To River Dee	BOOT & SHIP PS , ,	8	43	99.5
Dwr Cymru Welsh Water	Greenfield Valley	CSO Adjacent A548 Road Bridge	25	40	100
Dwr Cymru Welsh Water	Dee Estuary	BAGILLT EAST SPS	11	28	100
Dwr Cymru Welsh Water	Estuarial Waters Of River Dee	GREENFIELD WWTW (STW) GREENFIELD	16	27	100
Dwr Cymru Welsh Water	River Alyn	CSO at Mold Committee's Sewerage System	33	26	100
Dwr Cymru Welsh Water	Black Brook	Mold Bryn Awelon - CSO	21	25	100
Dwr Cymru Welsh Water	Tan Lan Drains	CSO at Tanlan Bach Pumping Station	4	23	100
Dwr Cymru Welsh Water	River Wheeler	CROOKED HORN SPS NO 3 BRYNFORD	23	18	75.3
Dwr Cymru Welsh Water	River Y Garth	SWN Y DWR CSO	8	16	72.3
Dwr Cymru Welsh Water	Llanerchymor Gutter	MOSTYN NEAR FUN SHIP - SSO	8	13	56.5
Dwr Cymru Welsh Water	Dee Estuary	FLINT BARDYN PS , ,	32	13	98.1
Dwr Cymru Welsh Water	Dee	FLINT DEE COTTAGES PS	14	11	100
Dwr Cymru Welsh Water	Unnamed W/C	HOLYWELL PEN Y MAES RD/PEN Y M	29	11	99.7
Dwr Cymru Welsh Water	New Drain	STATION ROAD PS TALACRE	2	10	92.7
Dwr Cymru Welsh Water	River Alyn	CSO at Mold Gladstone St/Glan Yr Afon Rd	22	6	99.9
Dwr Cymru Welsh Water	Marsiandwr	TAI TREVOR PS LLANNERCHYMOR	4	5	100
Dwr Cymru Welsh Water	River Dee	GREENFIELD IND EST NO 1 HOLYWELL	4	3	100
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT STATION ROAD - SSO	5	3	100
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT GREENACRE DRIVE - SSO	11	3	99.6
Dwr Cymru Welsh Water	Swinchiard Brook	FLINT STW (THE MEADOWS) , ,	3	3	100
Dwr Cymru Welsh Water	River Dee Estuary	DISCHARGE A 14 FFORDD DDYFRDWY	9	3	94.5
Dwr Cymru Welsh Water	Unnamed W/C	PEN Y FFORDD ADJ PEN Y FFORDD	5	2	90.4
Dwr Cymru Welsh Water	River Alyn	Mold Old St Davids Lane/Bridge St CSO	2	1	100
Dwr Cymru Welsh Water	River Wheeler	YSCEIFIOG CSO	2	1	99.9
Dwr Cymru Welsh Water	Wepre Brook	Northop Hall SPS	2	1	99.5
Dwr Cymru Welsh Water	Nant Y Flint	Lygan-Y-Wern Pentre Halkyn SPS	3	1	99.5
Dwr Cymru Welsh Water	Unnamed W/C	GREENFIELD A548 NR ABBEY MILL	3	0	100
Dwr Cymru Welsh Water	River Alyn	Mold Gas Lane CSO	3	0	99.9
Dwr Cymru Welsh Water	River Alyn	Mold Football Club Drice CSO	2	0	100
Dwr Cymru Welsh Water	Unnamed Watercourse	Bagillt verge off Manor Drive CSO	2	0	89
Dwr Cymru Welsh Water	Culverted Of Dee	MOSTYN DOCKS CAR PARK - SSO	1	0	18.6
Dwr Cymru Welsh Water	River Alun	Mynydd Isa Chambers lane/Mercia Drive CSO	2	0	100
Dwr Cymru Welsh Water	River Alyn	Bridge Inn Pumping Station	2	0	99.6
Dwr Cymru Welsh Water	Unnamed W/C	BAGILLT TYDDYN MESHAM LANE - SSO	1	0	32.3
Dwr Cymru Welsh Water	Nant Brook Via A Ditch	Leeswood Bethania SPS	0	0	100
Dwr Cymru Welsh Water	River Alyn	Mold Argoed CSO	0	0	99.4
Dwr Cymru Welsh Water	River Alyn	Mold Bryn Coch Lane/Lon Y Parc CSO	0	0	99.8
Dwr Cymru Welsh Water	Gutter Fawr	ARGOED PS	0	0	100
Dwr Cymru Welsh Water	Unnamed W/C	GWESPYR OLD STW - SSO	0	0	100
Dwr Cymru Welsh Water	Surface Water Sewer	Northop Hall CSO	0	0	7.1
Dwr Cymru Welsh Water	Unnamed Watercourse	MERLLYN LANE BAGILLT	0	0	99.2
Dwr Cymru Welsh Water	Unnamed W/C	HOLYWELL STRAND WALK NR STRAND	0	0	100
Dwr Cymru Welsh Water	Maescoed Drain	TALACRE STATION ROAD PS	0	0	0
Dwr Cymru Welsh Water	River Alyn	PONTBLYDDYN NO 1 PUMPING STATION	0	0	99.5
Dwr Cymru Welsh Water	Culverted Of Dee	MOSTYN ARMS PS MOSTYN	0	0	99
Dwr Cymru Welsh Water	Dolfechlas Brook	Rhydymwyn Wastewater Treatment Works Storm Overflow	0	0	100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales

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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Delyn polluted by sewage 1,076 times in 2022 - lasting 4,662 hours

54 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2022

Data Sources & Accuracy

Media Queries

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