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March for Clean Water

Brecon, Radnor and Cwm Tawe was polluted by sewage 6,829 times in 2023
lasting 63,310 hours - that's 7.33 years!
- but monitoring was disabled in some locations, so could be more

Select the constituency from the drop-down

Constituency

✔ means we have experimental daily data since 2023

Totals for Brecon, Radnor and Cwm Tawe in 2023

102 Sites polluted by Dwr Cymru Welsh Water

6,829 sewage dumps
63,310 h duration

That's 7.33 years! On average 18.7 times a day

Change Over Time

Take Action

Your local MP is David Chadwick (Liberal Democrat) - Find out more about their interests, donors, and voting at They Work For You

Constituencies near Brecon, Radnor and Cwm Tawe

Waterways in Brecon, Radnor and Cwm Tawe

Pollution Summary 2023

Here are all the reported sewage overflow totals for Brecon, Radnor and Cwm Tawe in 2023. 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 3 of the total 108 CSO locations had reporting enabled for less than half the year, of which 3 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Tawe	TREBANOS Wastewater Treament Works	208	4,059	99.9
Dwr Cymru Welsh Water	River Irfon	LLANWRTYD WELLS CSO ON TRUNK SEWER	177	3,290	100
Dwr Cymru Welsh Water	River Tawe	Settled Storm Sewage from Ystradgynlais WwTW	169	3,264	100
Dwr Cymru Welsh Water	River Cammarch	Beulah SPS Beulah Powys	211	3,125	99.6
Dwr Cymru Welsh Water	River Mellte	CSO at Pontneddfechan STW Swansea	213	2,625	100
Dwr Cymru Welsh Water	Culverted, River Tawe	CSO 4 Opposite Lamb & Flag Cottages	185	2,520	100
Dwr Cymru Welsh Water	River Tawe	CSO at Rear of Lonlas Station Road Abercrave	253	2,110	99
Dwr Cymru Welsh Water	River Irfon	Abernant Lake CSO	149	1,967	98.2
Dwr Cymru Welsh Water	River Tawe	Rear of Canal Cottage CSO, Abercrave	152	1,883	96.3
Dwr Cymru Welsh Water	River Usk	Sennybridge Wastewater Treatment Works Storm Sewage Overflow	151	1,777	100
Dwr Cymru Welsh Water	River Usk	Settled Storm Sewage from Brecon Wastewater Treatment Works	87	1,745	100
Dwr Cymru Welsh Water	Right Bank Of River Twrch	CSO on A4068 above Lower Brunorgan Bridge	131	1,708	98.6
Dwr Cymru Welsh Water	River Wye	Builthwells WWTW CSO	134	1,661	100
Dwr Cymru Welsh Water	River Garnant	GCG - D/S of Graig Road CSO	100	1,648	35
Dwr Cymru Welsh Water	River Ithon	CROSSGATES STW	103	1,605	100
Dwr Cymru Welsh Water	Nant Logyn	Trecastle STW Settled Storm	85	1,603	26.6
Dwr Cymru Welsh Water	River Chwefru	CSO at Cilmery STW	134	1,418	99.9
Dwr Cymru Welsh Water	River Tawe	CSO at Craig Y Duke Trebanos SOC	147	1,288	77.2
Dwr Cymru Welsh Water	River Ithon	Llanddewi Toll House	100	1,106	98.9
Dwr Cymru Welsh Water	River Usk	CSO at BWLCH SOUTH WwTW	129	1,086	99.7
Dwr Cymru Welsh Water	River Ithon	Llandrindod Wells STW Park Lane Settled Storm	98	1,032	91.7
Dwr Cymru Welsh Water	River Garnant	CSO 27 BOUNDARY RD BRIDGE GARNANT	91	1,011	100
Dwr Cymru Welsh Water	River Tawe	CSO at Ynysmeudw Warehouse (SOC	109	906	95
Dwr Cymru Welsh Water	Upper Clydach	CSO at Dilwyn Arms Pontardawe Cross NPT	131	880	98.1
Dwr Cymru Welsh Water	Howey Brook	Howey SPS	86	858	100
Dwr Cymru Welsh Water	River Ithon	PENYBONT P.S.	55	831	100
Dwr Cymru Welsh Water	River Tawe	CSO at O/S 17 Glantawe Row Ystradgynlais	127	787	98.8
Dwr Cymru Welsh Water	Nant Helen	STATION RD GWYNFRYNLEN CSO	86	779	98.4
Dwr Cymru Welsh Water	River Lugg	LLANGUNLLO STW PS	52	725	100
Dwr Cymru Welsh Water	River Tawe	Nr Gough Arms MH CSO	117	639	98.3
Dwr Cymru Welsh Water	Irfon River	LLANWRTYD WELLS STW LLANWRTYD WELLS	29	603	99.9
Dwr Cymru Welsh Water	Caerfanell	Talybont Sewage Treatment Works Settled Storm	64	535	99.9
Dwr Cymru Welsh Water	River Wye	Storm Tanks at Rhayader STW	78	525	93.6
Dwr Cymru Welsh Water	River Ithon	CSO OPPOSITE LODORE	104	504	96.9
Dwr Cymru Welsh Water	River Usk	BRECON STW BRECON WWTW BRECON POWYS	25	489	100
Dwr Cymru Welsh Water	U Nant Llech	Colbren PS 1 Emerg	101	479	99.1
Dwr Cymru Welsh Water	River Usk	Crickhowell Settled Storm at STW	85	463	100
Dwr Cymru Welsh Water	River Tawe	Pontardawe Leis Centre CSO Swansea	93	434	98.4
Dwr Cymru Welsh Water	River Usk	Brecon Showfields CSO Brecon Powys	56	433	99.9
Dwr Cymru Welsh Water	River Ithon	LLANDRINDOD WELLS STW PARK LANE	29	415	100
Dwr Cymru Welsh Water	River Wye	Glasbury STW Glasbury Nr Hay On Wye	47	406	94.8
Dwr Cymru Welsh Water	Nant Hir	CSO at GCG - rear of 40 Ger yr Afon	90	360	99.6
Dwr Cymru Welsh Water	River Wye	CHURCH LANE STW CHURCH ROAD	55	351	100
Dwr Cymru Welsh Water	River Tawe	CSO Godre'r Graig SOC 20. Godre'r	40	351	99.9
Dwr Cymru Welsh Water	River Garnant	CSO 26 QUARRY PLACE AMMONFORD	48	339	75.9
Dwr Cymru Welsh Water	Henllan Brook	CSO at Llanelwedd Primary School Bridge	48	336	99.3
Dwr Cymru Welsh Water	Upper Clydach River	JAMES STREET CSO	155	322	98.9
Dwr Cymru Welsh Water	River Lugg	CSO at Presteigne - O/S SPS Tanyard	52	294	98.8
Dwr Cymru Welsh Water	River Irfon	Cefn Gorwydd Wastewater Treatment Works	61	289	100
Dwr Cymru Welsh Water	Nant Ddu	Cray Sewage Treatment Works	30	283	98.2
Dwr Cymru Welsh Water	River Llynfi	Talgarth STW Settled Storm	14	263	100
Dwr Cymru Welsh Water	River Wye	The Strand CSO, Church Street, Builth Wells	68	261	93.7
Dwr Cymru Welsh Water	Tregoyd Brook	Three Cocks Aberllynfi SPS	43	250	100
Dwr Cymru Welsh Water	River Wye	CSO at Rhayader WwTW	79	248	100
Dwr Cymru Welsh Water	River Tawe	CSO 12 B4599 Road Bridge	76	244	100
Dwr Cymru Welsh Water	River Wye	Hay-on-Wye (Main) SPS	95	240	98.9
Dwr Cymru Welsh Water	River Irfon	Dolwen Fields CSO	76	215	99.7
Dwr Cymru Welsh Water	River Amman	CSO 22 SW CORNER OF DISUSED TIP	35	200	33.6
Dwr Cymru Welsh Water	River Tawe	SWN YR AFON CSO, Ystradgynlais	74	200	98.5
Dwr Cymru Welsh Water	River Tawe	CSO at MH 92 nr Claypon Bridge, Ystradgynlais	39	190	99.2
Dwr Cymru Welsh Water	Nant Menascin	100 YARDS D/S OF LLANFRYNACH STW	27	187	99.9
Dwr Cymru Welsh Water	River Tawe	CSO M'HOLE 14 ABERCRAVE ST.DAVIDS C	63	184	51
Dwr Cymru Welsh Water	River Usk	SPS at Brecon - Watton 10 Metres South Of	84	179	100
Dwr Cymru Welsh Water	River Usk	Legar CSO	75	153	100
Dwr Cymru Welsh Water	River Irfon	Llangammarch Wells STW CSO Ejector	29	150	100
Dwr Cymru Welsh Water	River Tawe	Office Row Car Park Ystalyfera CSO	51	146	100
Dwr Cymru Welsh Water	River Llynfi	Trefecca Old Railway CSO, Maesgwyn	29	141	99.6
Dwr Cymru Welsh Water	Llynfi River	TALGARTH STW BRONLLYS ROAD TALGARTH	17	138	100
Dwr Cymru Welsh Water	River Twrch	CSO 21 BRIDGE STREET	26	137	98.9
Dwr Cymru Welsh Water	Nant Gyrlais	CSO 10 Rear Of Waun Gyrlais Penrhos	60	133	98.7
Dwr Cymru Welsh Water	Unnamed Watercourse	Bronllys Rear of garage A479	70	128	97.4
Dwr Cymru Welsh Water	River Usk	GARN PS CRICKHOWELL	47	108	99.8
Dwr Cymru Welsh Water	Caerfanell	Talybont Across from Cattle Market CSO	12	106	100
Dwr Cymru Welsh Water	River Wye	Llyswen STW Settled Storm	25	91	91.5
Dwr Cymru Welsh Water	River Wye	CSO at Newbridge on Wye STW	40	91	100
Dwr Cymru Welsh Water	River Tawe	CSO at Mason Arms, Ystradgynlais	26	83	99.5
Dwr Cymru Welsh Water	River Usk	Llangynidr (Coed-yr-Ynys) SPS	38	82	100
Dwr Cymru Welsh Water	River Tawe	SWO.M'HOLE12 CWMTAWE FM PENRHOS	19	75	76.9
Dwr Cymru Welsh Water	Nant Gelli-Nedd	CSO ADJ 97 CRAIG RD GELLINUDD	30	69	99.8
Dwr Cymru Welsh Water	River Ithon	CSO at RIDGEBOURNE CATCHMENT AREA LLANDRI	41	64	98.8
Dwr Cymru Welsh Water	River Wye	Glasbury STW Glasbury Nr Hay On Wye	7	62	94.8
Dwr Cymru Welsh Water	River Tawe	Pontardawe 2 To R Tawe CSO Swansea	16	45	100
Dwr Cymru Welsh Water	River Lugg	PRESTEIGNE STW CLATTERBROOM	10	45	100
Dwr Cymru Welsh Water	River Wye	CSO at Rhayader Fields St. Brides Church	11	41	99.7
Dwr Cymru Welsh Water	River Lugg	Settled Storm Sewage from Presteigne WwTW	9	35	100
Dwr Cymru Welsh Water	Nant Llynfell	SWO.M'HOLE 154A GEORGE IV PH UPPER CSO	17	23	99.5
Dwr Cymru Welsh Water	River Usk	BRECON SEWERAGE SYSTEM	10	20	17
Dwr Cymru Welsh Water	River Usk	CRICKHOWELL CSO	13	18	99.9
Dwr Cymru Welsh Water	River Wye	CSO Llanelwedd - Scout Hut Station Road	3	17	99.8
Dwr Cymru Welsh Water	River Wye	North Road CSO North Rd Builth Well	11	13	100
Dwr Cymru Welsh Water	River Usk	CRICKHOWELL - BRIDGE END CAR P	4	12	99.8
Dwr Cymru Welsh Water	Felindre Brook	Three Cocks	2	11	60.7
Dwr Cymru Welsh Water	Usk River	SENNYBRIDGE STW	7	7	99.7
Dwr Cymru Welsh Water	River Ithon	CSO at Ithon Road, Llandrindod Wells	7	7	100
Dwr Cymru Welsh Water	Irfon	LLANGAMMARCH WELLS STW	1	5	100
Dwr Cymru Welsh Water	River Usk	Crickhowell - Bullpit Meadow S CSO	10	3	100
Dwr Cymru Welsh Water	River Ennig	CSO at Talgarth o/s Autumn lodge	3	2	100
Dwr Cymru Welsh Water	Nant Y Llechau	CSO Near Delffordd	8	2	94.7
Dwr Cymru Welsh Water	River Usk	Brynawel Estate, Trecastle CSO	7	1	100
Dwr Cymru Welsh Water	River Usk Via Surface Water Sewer	Brecon Supermarket CSO	3	0	100
Dwr Cymru Welsh Water	Grywne Fawr	CWRT Y GOLLEN SPS CRICKHOWELL	1	0	100
Dwr Cymru Welsh Water	River Usk	Bridge St CSO	1	0	7.5
Dwr Cymru Welsh Water	River Senni	Brodawel - Sennybridge	0	0	0
Dwr Cymru Welsh Water	River Ithon	Llanyre STW Settled Storm	0	0	99.8
Dwr Cymru Welsh Water	River Lugg	Tanyard Pumping Station CSO/EO	0	0	0
Dwr Cymru Welsh Water	River Llynfi	A479 Bronlly Road CSO	0	0	0
Dwr Cymru Welsh Water	River Wye	CSO at Weun Chapel Park Toilets, Rhayader	0	0	99.9
Dwr Cymru Welsh Water	River Wye	Hay-on-Wye (Warren Close) SPS	0	0	100

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

With generous support from:

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