Monmouthshire was polluted by sewage 2,438 times in 2024
lasting 25,651 hours - that's 2.97 years!

Constituency

Select the constituency from the drop-down

✔ means we have experimental daily data since 2023

Totals for Monmouthshire in 2024

31 Sites polluted by Dwr Cymru Welsh Water

2,438 sewage dumps
25,651 h duration

That's 2.97 years! On average 6.7 times a day

Change Over Time

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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 2024

Here are all the reported sewage overflow totals for Monmouthshire 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 0 of the total 32 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)	278	6,266	99.6
Dwr Cymru Welsh Water	River Usk	USK STW GRAIG OLWAY FARM LLANGVIEW	177	2,844	99.8
Dwr Cymru Welsh Water	Usk River	GOYTRE SEWAGE TREATMENT WORKS NANT	157	2,289	99.8
Dwr Cymru Welsh Water	River Clydach	Maesygwartha SPS and CSO	149	2,209	98.8
Dwr Cymru Welsh Water	Clawdd Brook	CSO at Great Oak STW	134	2,130	99.2
Dwr Cymru Welsh Water	River Usk	Llangybi STW Llangybi Usk Settled Storm	189	1,773	99.9
Dwr Cymru Welsh Water	River Wye	MONMOUTH STW REDBROOK ROAD MONMOUTH	110	1,132	99.5
Dwr Cymru Welsh Water	River Honddu	PANDY STW PANDY MONMOUTHSHIRE	85	1,092	99.8
Dwr Cymru Welsh Water	River Usk	LLANFOIST WASTEWATER TREATMENT WORKS ME	96	920	99.8
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow South SPS Hunger Pill STW	118	918	92.5
Dwr Cymru Welsh Water	Mounton Brook	Mathern SPS	66	672	99.8
Dwr Cymru Welsh Water	River Usk	LLANGYBI STW LLANGYBI USK	45	541	100
Dwr Cymru Welsh Water	River Wye	CSO at Welsh Street Chepstow	106	492	98.2
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow North Fairfield SPS	100	480	99.8
Dwr Cymru Welsh Water	River Wye	Tintern Main SPS	55	319	99.8
Dwr Cymru Welsh Water	River Wye	Monmouth 2 CSO	65	292	99.7
Dwr Cymru Welsh Water	River Usk	ABERBAIDEN STW BEHIND HOP YARD FARM	65	275	99.1
Dwr Cymru Welsh Water	Berthin Brook	Little Mill CSO, Panty Pwdin	49	193	98.3
Dwr Cymru Welsh Water	River Usk	Mill Street Screens CSO Abergaven	61	182	96.3
Dwr Cymru Welsh Water	Nant Y Wilcae	RAGLAN STW CHEPSTOW ROAD RAGLAN	51	149	99.8
Dwr Cymru Welsh Water	River Wye Estuary	Chepstow North SPS The Back	85	101	99.8
Dwr Cymru Welsh Water	River Monnow	CSO at Monmouth Town Pumping Station	40	95	99.8
Dwr Cymru Welsh Water	River Wye	Thornwell Road CSO	63	88	99.8
Dwr Cymru Welsh Water	Usk River	ABERBAIDEN STW MONMOUTH	5	57	100
Dwr Cymru Welsh Water	Clydach River	CLYDACH CSO	12	38	99.4
Dwr Cymru Welsh Water	Nant Wilcae	Raglan CSO No. 1	10	38	97.8
Dwr Cymru Welsh Water	River Clydach	Glangrwyney Rd CSO, Gilwern	28	26	99.8
Dwr Cymru Welsh Water	River Severn Estuary	Magor SPS Magor STW Site Newport	11	12	99.6
Dwr Cymru Welsh Water	River Wye	Raglan Way CSO	23	9	99.4
Dwr Cymru Welsh Water	Rivr Wye	WARREN SLADE SEWAGE PUMPING STATION	1	6	99.9
Dwr Cymru Welsh Water	Olway Brook	RAILWAY COTTAGE CSO	4	4	99.9
Dwr Cymru Welsh Water	River Severn Estuary	Caldicot SPS at Caldicot STW	0	0	99.6

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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