Top of the Poops | Constituency Sewage Map | Montgomeryshire and Glyndwr

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Live data for Montgomeryshire and Glyndwr in 2026

So far this year (as of 26 Oct 2026, 00:45) there has been 7,817 hours of sewage overflows, from 42 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in Montgomeryshire and Glyndwr

On 20 occasions since December 2024, no rain fell anywhere in Montgomeryshire and Glyndwr for days — and its CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s discharged anyway.

19 Mar - 23 Mar 2026 2 at once · 137h 25 Sept - 26 Sept 2025 2 at once · 37h 26 Dec 2025 2 at once · 36h

Totals for Montgomeryshire and Glyndwr in 2025

35 Sites polluted by Dwr Cymru Welsh Water

1,158 sewage dumps

8,891 hours duration

Sewage pollution map of Montgomeryshire and Glyndwr: 1,158 spills in 2025, lasting 8,891 hours, by Dwr Cymru Welsh Water

That's 12.35 months. On average 3.2 times a day

Change Over Time

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Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Twymyn	Commins Coch Pumping Station CSO	120	2,675	99.9
Dwr Cymru Welsh Water	River Iaen	LLANBRYNMAIR STW LLANBRYNMAIR	95	1,855	94.4
Dwr Cymru Welsh Water	Wye River	LLANGURIG STW	75	1,476	99.9
Dwr Cymru Welsh Water	Garsiwn Ditch	MACHYNLLETH STW CSO	65	460	98.7
Dwr Cymru Welsh Water	Dyfi	MACHYNLLETH STW	55	410	98.6
Dwr Cymru Welsh Water	River Dee	CEFN MAWR WwTW	48	318	99.9
Dwr Cymru Welsh Water	River Goch	Pant CSO	73	313	99.9
Dwr Cymru Welsh Water	River Aber Glesyrch	Ceinws SPS	20	197	99.8
Dwr Cymru Welsh Water	Tref Y Nant Brook	CEFN PS	46	157	99.5
Dwr Cymru Welsh Water	Glanyrafon Brook	Rhostyllen Bersham Colliery CSO	52	145	99.5
Dwr Cymru Welsh Water	River Goch	Afon Eitha CSO	52	88	98.9
Dwr Cymru Welsh Water	Garsiwn River Dovey	Machynlleth - Doll Street CSO	62	86	99
Dwr Cymru Welsh Water	River Ceiriog	DOL Y WERN - CSO	32	69	99.6
Dwr Cymru Welsh Water	River Eitha	Penycae SPS	17	66	99.9
Dwr Cymru Welsh Water	Tref Y Nant Brook	Cefn Monsanto CSO	28	58	99.5
Dwr Cymru Welsh Water	Black Spool	Johnstown Combined Sewerage System CSO	32	55	99.9
Dwr Cymru Welsh Water	River Goch	Bersham Colliery CSO	36	53	99.9
Dwr Cymru Welsh Water	River Bradley	CHIRK PS (SCREENED STROM)	24	52	99.8
Dwr Cymru Welsh Water	Eitha	Ruabon PS	20	51	99.9
Dwr Cymru Welsh Water	Unnamed Watercourse	Fford Offa CSO	31	48	99.2
Dwr Cymru Welsh Water	River Dyfi	MACHYNLLETH WWTW (STORM OUTFALL)	9	47	99.3
Dwr Cymru Welsh Water	River Dee	Chirk O/S 24 Offa St CSO	14	45	99.6
Dwr Cymru Welsh Water	River Ceiriog	Glynceiriog Y Gammer - CSO	45	33	98.7
Dwr Cymru Welsh Water	Eitha	Ruabon Paddock Row CSO	7	20	96.9
Dwr Cymru Welsh Water	Glanyrafon Brook	CSO at COLLIERY ROAD RHOSTYLLEN	19	19	99.7
Dwr Cymru Welsh Water	Black Brook	Aberderfyn CSO, Rhosllanerchrugog	13	18	84.4
Dwr Cymru Welsh Water	River Dee	Rhosymedre Park Rd CSO	11	16	99.2
Dwr Cymru Welsh Water	River Laen	CSO at Llanbrynmair STW Llanbrynmair	3	14	100
Dwr Cymru Welsh Water	River Dee	Newbridge SPS	7	14	99.7
Dwr Cymru Welsh Water	Garsiwn Ditch	Heol Penrallt CSO	14	8	99.9
Dwr Cymru Welsh Water	Un-Named Watercourse	Machynlleth - Popular Road CSO	21	7	91.1
Dwr Cymru Welsh Water	River Dee	CSO at Rear Hamden Way Plas Madoc	4	1	99.6
Dwr Cymru Welsh Water	River Eitha	Penycae West End School Field Land CSO	5	1	99.5
Dwr Cymru Welsh Water	River Ceiliog	DOLYWERN STW	2	1	99.9
Dwr Cymru Welsh Water	Unnamed Flowing To Bradley Brook	Chirk Chapel Lane CSO	1	0	96.3
Dwr Cymru Welsh Water	River Bradley	CHIRK PS (SCREENED STORM)	0	0	99.8
Dwr Cymru Welsh Water	River Goch	CSO at Ruabon Combined Sewerage System	0	0	99.9
Dwr Cymru Welsh Water	River Twymyn	LLAN LLANBRYNMAIR PS CSO	0	0	99.9
Dwr Cymru Welsh Water	Garsiwn Ditch	MACHYNLLETH STW	0	0	98.7

Montgomeryshire and Glyndwr

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Live data for Montgomeryshire and Glyndwr in 2026

Sewage without rain in Montgomeryshire and Glyndwr

Totals for Montgomeryshire and Glyndwr in 2025

35 Sites polluted by Dwr Cymru Welsh Water

Change Over Time

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