Top of the Poops | Waterway | River Dee | Polluted by Dwr Cymru Welsh Water

Pollution Summary 2025

Here are all the reported sewage overflow totals for River Dee in 2025. Sometimes sewage can be being dumped for months at a time.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Dee	CORWEN WWTW FINAL EFFLUENT	58	881	99.9
Dwr Cymru Welsh Water	River Dee	BALA WWTW	92	693	99.8
Dwr Cymru Welsh Water	River Dee	BANGOR ON DEE STW	48	561	99.9
Dwr Cymru Welsh Water	River Dee	FIVE FORDS STW	45	557	97.3
Dwr Cymru Welsh Water	River Dee	LLANGOLLEN WWTW	50	455	99.9
Dwr Cymru Welsh Water	River Dee	CEFN MAWR WwTW	48	318	99.9
Dwr Cymru Welsh Water	River Dee	DEE LANE CSO	58	233	99.9
Dwr Cymru Welsh Water	River Dee	OVERTON WWTW	51	222	99.9
Dwr Cymru Welsh Water	River Dee	Ashgrove PS Shotton	55	212	99.9
Dwr Cymru Welsh Water	River Dee	CHESTER WASTEWATER TREATMENT WORKS	26	149	99.9
Dwr Cymru Welsh Water	River Dee	Abbey Road CSO	44	139	99.9
Dwr Cymru Welsh Water	River Dee	LITTLE ROODEE CSO	36	109	99.9
Dwr Cymru Welsh Water	River Dee	Higher Kinnerton SPS	14	89	99.9
Dwr Cymru Welsh Water	River Dee	THE DINGLE CHESTER CSO	66	82	98.5
Dwr Cymru Welsh Water	River Dee	THE GROVES CSO	34	80	99.8
Dwr Cymru Welsh Water	River Dee	DEVA TERRACE CSO	44	78	96.6
Dwr Cymru Welsh Water	River Dee	CHESTER WEIR (SOUTH BANK) CSO	20	73	95.9
Dwr Cymru Welsh Water	River Dee	CSO AT CHESTER STW	28	56	99.9
Dwr Cymru Welsh Water	River Dee	GREENFIELD IND EST NO 1 HOLYWELL	9	49	98.9
Dwr Cymru Welsh Water	River Dee	Chirk O/S 24 Offa St CSO	14	45	99.6
Dwr Cymru Welsh Water	River Dee	SAUGHALL VILLAGE CSO	9	41	89.5
Dwr Cymru Welsh Water	River Dee	GROSVENOR BRIDGE CSO	13	38	99.8
Dwr Cymru Welsh Water	River Dee	WEST STREET CSO	11	36	99.9
Dwr Cymru Welsh Water	River Dee	PEN Y MAES PUMPING STATION	13	35	99.9
Dwr Cymru Welsh Water	River Dee	CRANE STREET CSO	20	34	96
Dwr Cymru Welsh Water	River Dee	BOATHOUSE INN CSO	23	28	99.9
Dwr Cymru Welsh Water	River Dee	Eyton Grove SPS	3	22	99.9
Dwr Cymru Welsh Water	River Dee	Rhosymedre Park Rd CSO	11	16	99.2
Dwr Cymru Welsh Water	River Dee	Newbridge SPS	7	14	99.7
Dwr Cymru Welsh Water	River Dee	CONNAHS QUAY DEVA AVENUE - CSO	13	9	98
Dwr Cymru Welsh Water	River Dee	Corwen Corner Station Yard CSO	4	7	99.6
Dwr Cymru Welsh Water	River Dee	SALTNEY SEWERAGE CHESTER STREET PS	6	6	99.8
Dwr Cymru Welsh Water	River Dee	Holt PS	10	4	99.9
Dwr Cymru Welsh Water	River Dee	EDGAR PARK CSO	10	4	99.1
Dwr Cymru Welsh Water	River Dee	Royal Hotel CSO	3	1	99.9
Dwr Cymru Welsh Water	River Dee	CSO at Rear Hamden Way Plas Madoc	4	1	99.6
Dwr Cymru Welsh Water	River Dee	Llangollen East St CSO	5	1	99.7
Dwr Cymru Welsh Water	River Dee	Llangollen Chruch St CSO	2	0	97.2
Dwr Cymru Welsh Water	River Dee	Llangollen Riverside Park Printing Works CSO	2	0	99.8
Dwr Cymru Welsh Water	River Dee	Llangollen Victoria Prom Riverside CSO	2	0	100
Dwr Cymru Welsh Water	River Dee	GAYTON PARKWAY CSO	1	0	99.7
Dwr Cymru Welsh Water	River Dee	Connahs Quay Dock Road PS	1	0	99.9
Dwr Cymru Welsh Water	River Dee	REAR OF 22 CURZON PARK NORTH CSO	1	0	99.7
Dwr Cymru Welsh Water	River Dee	SANDY LANE COMBINED SEWER OVERFLOW	1	0	99.9
Dwr Cymru Welsh Water	River Dee	THE DINGLE COMBINED SEWER OVERFLOW	1	0	99
Dwr Cymru Welsh Water	River Dee	MARSH FARM PUMPING STATION	1	0	99.1
Dwr Cymru Welsh Water	River Dee	Park Avenue CSO	1	0	99.9
Dwr Cymru Welsh Water	River Dee	Connahs Quay Linden Avenue - CSO	0	0	88.3
Dwr Cymru Welsh Water	River Dee	OLD DEE BRIDGE (NORTH BANK) CSO	0	0	99.9
Dwr Cymru Welsh Water	River Dee	CHESTER BELGRAVE PARK SPS	0	0	99.9
Dwr Cymru Welsh Water	River Dee	HANDBRIDGE GREENBANK SPS	0	0	99.9

It's a Dirty Business

River Dee polluted by sewage 1,018 times in 2025 - lasting 5,395 hours

47 Sites polluted by Dwr Cymru Welsh Water

Pollution Summary 2025

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