Join Us 3rd November 2024 - London

March for Clean Water

Monmouthshire was polluted by sewage 2,383 times in 2023
lasting 21,896 hours - that's 2.53 years!

Select the constituency from the drop-down

Constituency

✔ means we have experimental daily data since 2023

Totals for Monmouthshire in 2023

35 Sites polluted by Dwr Cymru Welsh Water

2,383 sewage dumps
21,896 h duration

That's 2.53 years! On average 6.5 times a day

Change Over Time

Take Action

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

Constituencies near Monmouthshire

Waterways in Monmouthshire

Pollution Summary 2023

Here are all the reported sewage overflow totals for Monmouthshire 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 0 of the total 36 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Mounton Brook	Pwllmeyric SPS (CSO)	262	5,755	98.9
Dwr Cymru Welsh Water	River Usk	Llangybi STW Llangybi Usk Settled Storm	234	2,097	100
Dwr Cymru Welsh Water	River Usk	GOYTRE SEWAGE TREATMENT WORKS NANT Setteled Storm	122	1,983	96
Dwr Cymru Welsh Water	River Usk	Usk STW Settled Storm	136	1,555	100
Dwr Cymru Welsh Water	Clawdd Brook	CSO at Great Oak STW	86	1,454	99.5
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow South SPS Hunger Pill STW	142	1,378	100
Dwr Cymru Welsh Water	River Usk	Settled Storm Sewage Tanks at Pandy WwTW	62	884	100
Dwr Cymru Welsh Water	Usk River	ABERBAIDEN STW MONMOUTH	57	732	93.7
Dwr Cymru Welsh Water	River Wye	Tintern Main SPS	270	654	99.9
Dwr Cymru Welsh Water	River Clydach	Maesygwartha SPS and CSO	52	577	68.3
Dwr Cymru Welsh Water	River Wye	Settled Storm Sewage from Monmouth WwTW	66	545	99.9
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow North Fairfield SPS	120	540	100
Dwr Cymru Welsh Water	River Usk	Settled Storm Sewage from Llanfoist Wastewater Treatment Works	60	527	100
Dwr Cymru Welsh Water	River Honddu	CSO at Pandy WWTW	44	474	100
Dwr Cymru Welsh Water	Clydach River	CLYDACH CSO	63	469	99.7
Dwr Cymru Welsh Water	Usk River	GOYTRE SEWAGE TREATMENT WORKS NANT	23	397	99.9
Dwr Cymru Welsh Water	Mounton Brook	Mathern SPS	29	298	99.9
Dwr Cymru Welsh Water	River Wye	MONMOUTH STW REDBROOK ROAD MONMOUTH	24	263	99.9
Dwr Cymru Welsh Water	River Usk	LLANFOIST WASTEWATER TREATMENT WORKS ME	21	257	100
Dwr Cymru Welsh Water	River Usk	USK STW GRAIG OLWAY FARM LLANGVIEW	11	156	100
Dwr Cymru Welsh Water	Nant Y Wilcae	RAGLAN STW CHEPSTOW ROAD RAGLAN	34	151	86.8
Dwr Cymru Welsh Water	Mynachdy Brook	Bryn Y Gwenin SPS Abergavenny	14	120	100
Dwr Cymru Welsh Water	Berthin Brook	Little Mill CSO, Panty Pwdin	36	117	99.5
Dwr Cymru Welsh Water	River Wye	Monmouth 2 CSO	58	107	99.8
Dwr Cymru Welsh Water	River Usk	Mill Street Screens CSO Abergaven	56	95	100
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow North SPS The Back	91	92	100
Dwr Cymru Welsh Water	River Wye	Thornwell Road CSO	65	75	100
Dwr Cymru Welsh Water	River Wye	CSO at Welsh Street Chepstow	66	50	100
Dwr Cymru Welsh Water	River Monnow	CSO at Monmouth Town Pumping Station	25	38	100
Dwr Cymru Welsh Water	River Severn Estuary	Magor SPS Magor STW Site Newport	7	12	99.8
Dwr Cymru Welsh Water	River Wye	Raglan Way CSO	24	8	99.9
Dwr Cymru Welsh Water	River Clydach	Glangrwyney Rd CSO, Gilwern	16	7	100
Dwr Cymru Welsh Water	Rivr Wye	WARREN SLADE SEWAGE PUMPING STATION	3	5	94.8
Dwr Cymru Welsh Water	Nant Wilcae	Raglan CSO No. 1	3	5	88.5
Dwr Cymru Welsh Water	Olway Brook	RAILWAY COTTAGE CSO	1	4	91.7
Dwr Cymru Welsh Water	River Severn Estuary	Caldicot SPS at Caldicot STW	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

With generous support from:

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