Montgomeryshire and Glyndwr was polluted by sewage 1,485 times in 2024
lasting 11,705 hours - that's 1.35 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 Montgomeryshire and Glyndwr in 2024

34 Sites polluted by Dwr Cymru Welsh Water

1,485 sewage dumps
11,705 h duration

That's 1.35 years! On average 4.1 times a day

Change Over Time

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Constituencies near Montgomeryshire and Glyndwr

Waterways in Montgomeryshire and Glyndwr

Pollution Summary 2024

Here are all the reported sewage overflow totals for Montgomeryshire and Glyndwr 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 1 of the total 38 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Twymyn	Commins Coch Pumping Station CSO	190	4,270	99.8
Dwr Cymru Welsh Water	Wye River	LLANGURIG STW	99	1,673	99.1
Dwr Cymru Welsh Water	River Laen	CSO at Llanbrynmair STW Llanbrynmair	34	765	99.8
Dwr Cymru Welsh Water	River Goch	Pant CSO	109	665	99.7
Dwr Cymru Welsh Water	River Dee	CEFN MAWR WwTW	74	521	99.7
Dwr Cymru Welsh Water	Glanyrafon Brook	Rhostyllen Bersham Colliery CSO	88	490	98.6
Dwr Cymru Welsh Water	Tref Y Nant Brook	CEFN PS	73	487	98.6
Dwr Cymru Welsh Water	River Dyfi	MACHYNLLETH WWTW (STORM OUTFALL)	61	450	99.9
Dwr Cymru Welsh Water	Garsiwn Ditch	MACHYNLLETH STW CSO	61	449	99.9
Dwr Cymru Welsh Water	River Eitha	Penycae SPS	35	204	99.8
Dwr Cymru Welsh Water	River Aber Glesyrch	Ceinws SPS	20	183	99.5
Dwr Cymru Welsh Water	Tref Y Nant Brook	Cefn Monsanto CSO	62	155	97.9
Dwr Cymru Welsh Water	Garsiwn River Dovey	Machynlleth - Doll Street CSO	122	152	98.1
Dwr Cymru Welsh Water	Eitha	Ruabon PS	32	144	99.9
Dwr Cymru Welsh Water	River Bradley	CHIRK PS (SCREENED STROM)	38	139	99.9
Dwr Cymru Welsh Water	River Goch	Afon Eitha CSO	60	137	97.8
Dwr Cymru Welsh Water	River Ceiriog	DOL Y WERN - CSO	37	135	97.7
Dwr Cymru Welsh Water	Black Spool	Johnstown Combined Sewerage System CSO	37	121	99.9
Dwr Cymru Welsh Water	Unnamed Watercourse	Fford Offa CSO	52	121	98.5
Dwr Cymru Welsh Water	River Dee	Chirk O/S 24 Offa St CSO	19	105	98.8
Dwr Cymru Welsh Water	River Dee	Rhosymedre Park Rd CSO	14	61	97.9
Dwr Cymru Welsh Water	River Wye	Llangurig P.S. - Overflow	3	47	100
Dwr Cymru Welsh Water	Glanyrafon Brook	CSO at COLLIERY ROAD RHOSTYLLEN	23	42	99.9
Dwr Cymru Welsh Water	River Dee	Newbridge SPS	12	38	99.4
Dwr Cymru Welsh Water	River Ceiliog	DOLYWERN STW	6	30	100
Dwr Cymru Welsh Water	Un-Named Watercourse	Machynlleth - Popular Road CSO	42	29	98.5
Dwr Cymru Welsh Water	River Ceiriog	Glynceiriog Y Gammer - CSO	29	28	53.2
Dwr Cymru Welsh Water	River Goch	Bersham Colliery CSO	12	21	99.9
Dwr Cymru Welsh Water	Eitha	Ruabon Paddock Row CSO	5	12	99.1
Dwr Cymru Welsh Water	Garsiwn Ditch	Heol Penrallt CSO	16	9	99.8
Dwr Cymru Welsh Water	River Dee	CSO at Rear Hamden Way Plas Madoc	8	7	98.9
Dwr Cymru Welsh Water	Unnamed Flowing To Bradley Brook	Chirk Chapel Lane CSO	6	2	98.8
Dwr Cymru Welsh Water	River Eitha	Penycae West End School Field Land CSO	5	1	98.3
Dwr Cymru Welsh Water	River Ceiriog	CSO at Dolywern & Llwynmawr STW	1	0	99.3
Dwr Cymru Welsh Water	River Twymyn	LLAN LLANBRYNMAIR PS CSO	0	0	99.9
Dwr Cymru Welsh Water	River Bradley	CHIRK PS (SCREENED STORM)	0	0	99.9
Dwr Cymru Welsh Water	River Goch	CSO at Ruabon Combined Sewerage System	0	0	99.9
Dwr Cymru Welsh Water	Black Brook	Aberderfyn CSO, Rhosllanerchrugog	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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