Top of the Poops | Senedd Constituency Sewage Map | Pen-y-bont Bro Morgannwg

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Totals for Pen-y-bont Bro Morgannwg in 2025

64 Sites polluted by Dwr Cymru Welsh Water

1,757 sewage dumps

15,654 hours duration

That's 1.81 years. On average 4.8 times a day

Change Over Time

Senedd Constituencies near Pen-y-bont Bro Morgannwg

Westminster Constituencies within Pen-y-bont Bro Morgannwg

To see live data by overflow, go to the Westminster Constituency, then 'live data'

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Pen-y-bont Bro Morgannwg in 2025. 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 74 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year. Of these 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Ewenni	Ewenni No 2 Pumping Station	141	3,008	99.9
Dwr Cymru Welsh Water	River Thaw	COWBRIDGE STW COWBRIDGE VALE OF GLA	137	2,088	99.9
Dwr Cymru Welsh Water	River Ogwry	PENY BONT SEWAGE TREATMENT WORKS	87	1,422	99.9
Dwr Cymru Welsh Water	River Ely	COSLECH STW PETERSTON SUPER ELY	118	1,263	99.7
Dwr Cymru Welsh Water	Llandow Brook	Llandow SPS	67	1,207	99.4
Dwr Cymru Welsh Water	Stembridge Brook	Llysworney SPS	51	910	81.8
Dwr Cymru Welsh Water	Unnamed The	TRERHYNGYLL PS WEST OF JANE HODGE H	40	752	99.8
Dwr Cymru Welsh Water	Nant Iorwerth Goch	CSO AT BEDFORD ROAD CEFN CRIBWR ,	103	708	99.9
Dwr Cymru Welsh Water	Bristol Channel - Breaksea Pt	ABERTHAW WWTW W ABERTHAW BARRY	41	608	99.9
Dwr Cymru Welsh Water	Nant Ganna	Treoes Main SPS	30	537	99.8
Dwr Cymru Welsh Water	An Nant Dyfrygi	Ystrad Owen PS Vale Of Glamorgan	21	340	99.9
Dwr Cymru Welsh Water	River Thaw	East Orchard Castle CSO	30	275	99.8
Dwr Cymru Welsh Water	Severn Estuary	LLANTWIT MAJOR WWTW (STW) WICK ROAD	37	246	99.95
Dwr Cymru Welsh Water	River Ely	Whitebridge PS Peterston Super Ely	29	242	99.9
Dwr Cymru Welsh Water	North West Corner Of Barry	BARRY DOCKS PS CSO OFF WIMBOURNE RD	188	219	99.8
Dwr Cymru Welsh Water	Nant Heol Y Geifr	COYCHURCH ROAD CSO BRIDGEND	34	195	96.7
Dwr Cymru Welsh Water	Nant Heol-Y-Geifr	Hendre Road CSO Pencoed	48	139	99.6
Dwr Cymru Welsh Water	River Ogwr	CSO at Riverside Aberkenfig	52	114	99.3
Dwr Cymru Welsh Water	Ogmore Estuary	Laleston PS	38	108	96.1
Dwr Cymru Welsh Water	Nant Ganna	Llangan (NR Bridgend) SPS	37	100	99.8
Dwr Cymru Welsh Water	Coldbrook	COLDBROOK ROAD EAST 1 BARRY	5	96	99.7
Dwr Cymru Welsh Water	Bristol Channel	BARRY TWN PS LSO ISLAND CAR PARK	49	89	99.9
Dwr Cymru Welsh Water	Coldbrook	COLDBROOK RD EAST 2 BARRY	7	87	99.5
Dwr Cymru Welsh Water	River Thaw	Castileton Wood CSO, Barry	22	87	99.9
Dwr Cymru Welsh Water	Nant Y Geifr	REDLANDS CLOSE CSO PENCOED BRIDGEND	47	83	99.9
Dwr Cymru Welsh Water	Bristol Channel	FONTYGARY SPS AND LOWER FONTYGARY S	9	79	99.9
Dwr Cymru Welsh Water	River Llynfi	Brid Ogwr Pt 32 Aberkenfig CSO Br'd	24	72	99.9
Dwr Cymru Welsh Water	Bristol Channel	Rhoose SPS	13	67	99.2
Dwr Cymru Welsh Water	River Ely	PETERSTON SUPER ELY STW CSO MAIN AV	17	62	99.9
Dwr Cymru Welsh Water	River Weycock	Weycock Cross SPS	7	46	99.9
Dwr Cymru Welsh Water	Wrinstone Brook	WENVOE SEWAGE PUMPING STATION	13	40	99.9
Dwr Cymru Welsh Water	Coldbrook	DANIEL STREET CSO DANIEL STREET	8	37	99.9
Dwr Cymru Welsh Water	Barry Brook	CWM BARRY SPS PORTHKERRY PARK	10	34	99.4
Dwr Cymru Welsh Water	Nant Talwg	NANT TALWG PS BARRY	6	31	91.1
Dwr Cymru Welsh Water	River Ewenny	EWENNY P.STN. NO. 1 EMERGEN	5	30	99.9
Dwr Cymru Welsh Water	Highway - Colwinston Brook	Storm Overflow and Emergency Overflow at Colwinston Pumping Station	5	23	99.9
Dwr Cymru Welsh Water	Nant Ffornwg	Ty-Isaf Road CSO	15	23	98.8
Dwr Cymru Welsh Water	Whitelands Brook	A SEWAGE PS PORTHKERRY SPS ASSET NO	2	21	99.9
Dwr Cymru Welsh Water	Coldbrook	MERTHYR DYFAN ROAD CSO BARRY	11	21	99.8
Dwr Cymru Welsh Water	Coldbrook	FOOTPATH R/O WESTBURY CLOSE BARRY	11	18	99.9
Dwr Cymru Welsh Water	Bristol Channel	BARRY TOWN PS ISLAND CAR PARK BARRY	10	15	99.1
Dwr Cymru Welsh Water	Cold Brook	Whitewell Road CSO 2, Barry	24	11	99.8
Dwr Cymru Welsh Water	Bristol Channel	BEACH ROAD CSO PORTHCAWL	9	8	99.9
Dwr Cymru Welsh Water	Bristol Channel	WINDSOR RAOD CSO PORTCAWL	18	8	99.6
Dwr Cymru Welsh Water	River Thaw	Graig Penllyne SPS	2	8	99.9
Dwr Cymru Welsh Water	Rhoose Brook	Station Rd CSO, Rhoose	3	6	93.8
Dwr Cymru Welsh Water	Bristol Channel At Irongate Pt	IRONGATE PS PORTCAWL BRIDGEND	4	6	99.9
Dwr Cymru Welsh Water	Nant Talwg	WESTWOOD RISE PUMPING STATION	4	5	99.9
Dwr Cymru Welsh Water	Bristol Channel Via Newton Pt	BEACH ROAD PUMPING STATION NEWTON	7	5	99.9
Dwr Cymru Welsh Water	Nant Cefn Glas	MILTON DRIVE CSO BRIDGEND	13	4	100
Dwr Cymru Welsh Water	Barry Dock No1	A COMBINED SEWER OVERFLOW DYFRIG ST	5	4	99.6
Dwr Cymru Welsh Water	River Cadoxton	ATLANTIC TRADING EST PS BARRY ,	1	3	100
Dwr Cymru Welsh Water	Barry Brook	A COMBINED SEWER OVERFLOW PONTYPRID	8	3	100
Dwr Cymru Welsh Water	River Ogmore	Swo. Tynycoed (Point 30) CSO	8	2	96.5
Dwr Cymru Welsh Water	River Ogmore	WILDMILL CSO WILDMILL BRIDGEND	1	2	98.7
Dwr Cymru Welsh Water	Barry Harbour	BARRY TOWN PS (EMER) ISLAND CAR PK	2	2	100
Dwr Cymru Welsh Water	Coldbrook	Barry - Coldbrook Road East CSO	4	2	99.6
Dwr Cymru Welsh Water	Coldbrook	WHITEWELL ROAD CSO 1 BARRY	5	2	100
Dwr Cymru Welsh Water	Barry Dock No 1	HOLTON ROAD CSO HOLTON ROAD	4	1	99.9
Dwr Cymru Welsh Water	Coldbrook	PRICE AVENUE CSO BARRY	3	1	99.2
Dwr Cymru Welsh Water	Wrinstone Brook	WENVOE CSO STATION ROAD EAST	3	1	81.5
Dwr Cymru Welsh Water	Barry Brook	COLCOT ROAD/CLAUDE ROAD ASSEST NO	2	0	100
Dwr Cymru Welsh Water	Barry Old Harbour	BARRY ISLAND PS	1	0	99.8
Dwr Cymru Welsh Water	Bristol Channel	Fonmon Park SPS, Rhoose	1	0	100
Dwr Cymru Welsh Water	River Ogmore	PBONT NEWBRDG FLDS CSO	0	0	0
Dwr Cymru Welsh Water	Estuarial Waters Of River Severn	Porthcawl Sanderling Close No 7	0	0	46.4
Dwr Cymru Welsh Water	Coldbrook	BARRY BRIDGE STREET CSO BARRY	0	0	100
Dwr Cymru Welsh Water	Unnamed Watercourse Then Pumping Station Then Barry Docks	CSO at BARRY - ST HILLARY RISE (REAR)	0	0	96.9
Dwr Cymru Welsh Water	Bristol Channel	KNAP PS BARRY VALE OF GLAMORGAN	0	0	99.9
Dwr Cymru Welsh Water	Barry Old Harbour	KNAPP SEWAGE PUMPING STATION BARRY	0	0	99.7
Dwr Cymru Welsh Water	River Colhuw	Llantwit Major SPS	0	0	100
Dwr Cymru Welsh Water	Nant Talwg	NANT TALWG WAY PUMPING STATION	0	0	99.9
Dwr Cymru Welsh Water	River Thaw	SPS Millfield Drive Cowbridge	0	0	99.9
Dwr Cymru Welsh Water	Tredogan Stream	Tredogan SPS	0	0	99.9

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. Live sewage data from Stream Water API

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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