Newport West and Islwyn was polluted by sewage 2,203 times in 2024
lasting 22,089 hours - that's 2.56 years!
- but monitoring was disabled in some locations, so could be more

Constituency

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✔ means we have experimental daily data since 2023

Totals for Newport West and Islwyn in 2024

33 Sites polluted by Dwr Cymru Welsh Water

2,203 sewage dumps
22,089 h duration

That's 2.56 years! On average 6 times a day

Change Over Time

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Constituencies near Newport West and Islwyn

Waterways in Newport West and Islwyn

Pollution Summary 2024

Here are all the reported sewage overflow totals for Newport West and Islwyn 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 2 of the total 37 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Severn Estuary	WESTERN VALLEY TRUNK SEWER CSO	202	4,059	92.3
Dwr Cymru Welsh Water	Severn Estuary	RHYMNEY VALLEY TRUNK SEWER CSO	197	3,412	99.8
Dwr Cymru Welsh Water	River Ebbw	Tanybryn Risca CSO, Pontymister	152	2,464	97.8
Dwr Cymru Welsh Water	River Rhymney	A CSO 700M SE OF PLAS MACHEN COTAGE	149	2,281	99.4
Dwr Cymru Welsh Water	Ebbw Estuary	Maesglas SPS	251	2,267	99.8
Dwr Cymru Welsh Water	Ebbw River	CSO 36 CWMCARN HIGH SCHOOL CHAPEL F	112	1,545	99.8
Dwr Cymru Welsh Water	Ebbw Fawr	Rhiwderin No 6258 in Field CSO	136	1,520	97.9
Dwr Cymru Welsh Water	Ebbw Fawr	Tredegar Park Golf Club CSO	123	1,015	95.4
Dwr Cymru Welsh Water	River Ebbw	Crosskeys Waunfawr Park CSO	76	909	98.8
Dwr Cymru Welsh Water	Ebbw River	CSO 47 ALCAN WORKS ROGERSTONE	56	624	94.8
Dwr Cymru Welsh Water	River Sirhowy	CSO 42 92 Tredegar St Cross Keys	36	359	99.8
Dwr Cymru Welsh Water	Ebbw River	Car Park of Old Globe CSO, St John Crescent	76	267	98.6
Dwr Cymru Welsh Water	Nant Carn Brook	Pontywaun CSO, Newport	72	266	97.2
Dwr Cymru Welsh Water	River Ebbw	CSO 33 REAR BRYNGWYN ROAD/HIGH ST	62	227	84
Dwr Cymru Welsh Water	Rhynys Brook	4 Tredegar Terrace CSO	19	142	99.6
Dwr Cymru Welsh Water	Sirhowy River	CSO CWM ROAD ARGOED CAERPHILLY	34	113	99.1
Dwr Cymru Welsh Water	Ebbw River	15 Tregwilym Close CSO	53	99	98.6
Dwr Cymru Welsh Water	River Ebbw	S/O 108 Commercial St, Risca CSO	55	68	99.8
Dwr Cymru Welsh Water	River Ebbw	MALVERN TERRACE CSO	24	65	99.9
Dwr Cymru Welsh Water	River Sirhowy	Blackwood 100 Steps CSO	36	59	71.8
Dwr Cymru Welsh Water	Rhynys Brook	Rifleman St CSO, Risca	66	56	98.7
Dwr Cymru Welsh Water	River Sirhowy	CSO 16 Woodfield Row Blackwood	36	54	99.8
Dwr Cymru Welsh Water	Sirhowy River	Blackwood Cwmgelli CSO	26	53	37.9
Dwr Cymru Welsh Water	Ebbw Fawr	CRUMLIN SWFFRYD CSO CAERPHILLY	28	39	77.3
Dwr Cymru Welsh Water	River Ebbw	CEDAR WOOD DRIVE CSO	23	26	99.1
Dwr Cymru Welsh Water	River Ebbw	CSO 52 TT Electronics Tregwilym Ind	4	24	99.8
Dwr Cymru Welsh Water	River Ebbw	WVTS-North Celynen Colliery CSO	6	22	99
Dwr Cymru Welsh Water	Nant Gwyddon Via Surface Water Sewer And A Culvert	High Street CSO, Abercarn	43	17	99.5
Dwr Cymru Welsh Water	Ebbw Fawr	Thornhill Gardens CSO, Rogerstone	28	11	99.4
Dwr Cymru Welsh Water	River Ebbw	WVTS - NEWBRIDGE CSO CAERPHILLY	10	8	99.8
Dwr Cymru Welsh Water	Sirhowy River	Markham Colliery Gun Club CSO	5	4	13.9
Dwr Cymru Welsh Water	Ebbw Fawr River	21 Gladstone St CSO, Crosskeys	5	1	99.5
Dwr Cymru Welsh Water	River Ebbw Fawr	CSO at Bassaleg Forge Lane near Nos 5 & 6	2	0	100
Dwr Cymru Welsh Water	Sirhowy River	Blackwood Oakdale Rhiw Hill CSO	0	0	46.9
Dwr Cymru Welsh Water	River Ebbw	Forge Lane near Vicarage CSO, Bassaleg	0	0	0
Dwr Cymru Welsh Water	River Ebbw	R/O Cobden St CSO, Crosskeys	0	0	99.5
Dwr Cymru Welsh Water	River Sirhowy	CSO at Hollybush - Ancient Druid	0	0	0

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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