Top of the Poops | Senedd Constituency Sewage Map | Brycheiniog Tawe Nedd

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Totals for Brycheiniog Tawe Nedd in 2025

172 Sites polluted by Dwr Cymru Welsh Water

8,306 sewage dumps

60,658 hours duration

That's 7.02 years. On average 22.8 times a day

Change Over Time

Senedd Constituencies near Brycheiniog Tawe Nedd

Westminster Constituencies within Brycheiniog Tawe Nedd

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

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Sewage pollution map of Brycheiniog Tawe Nedd: 60,658 hours in 2025

Sewage pollution map of Brycheiniog Tawe Nedd: 60,658 hours in 2025

Pollution Summary 2025

Here are all the reported sewage overflow totals for Brycheiniog Tawe Nedd 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 179 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 Dulais	CRYNANT STW CRYNANT NEATH	142	2,700	99.8
Dwr Cymru Welsh Water	Irfon River	LLANWRTYD WELLS STW LLANWRTYD WELLS	148	2,649	99.9
Dwr Cymru Welsh Water	River Tawe	TREBANOS Wastewater Treament Works	140	2,476	97.3
Dwr Cymru Welsh Water	Nant Logyn	Trecastle Wastewater Treatment Works	149	2,077	99.9
Dwr Cymru Welsh Water	River Garnant	GCG - D/S of Graig Road CSO	158	1,990	98.1
Dwr Cymru Welsh Water	Swansea Bay	BAGLAN SPS BRITON FERRY NEATH	154	1,876	99.8
Dwr Cymru Welsh Water	Culverted, River Tawe	CSO 4 Opposite Lamb & Flag Cottages	141	1,856	98.8
Dwr Cymru Welsh Water	Unnamed R Neath	PONTNEDDFECHAN STW SWANSEA	180	1,616	96.1
Dwr Cymru Welsh Water	River Usk	BRECON STW BRECON WWTW BRECON POWYS	85	1,429	99.9
Dwr Cymru Welsh Water	River Usk	SENNYBRIDGE ARMY CAMP STW	117	1,419	99.8
Dwr Cymru Welsh Water	Right Bank Of River Twrch	CSO on A4068 above Lower Brunorgan Bridge	112	1,410	95.8
Dwr Cymru Welsh Water	River Neath	CWMGWRCH STW CWMGWRCH NEATH	113	1,331	99.9
Dwr Cymru Welsh Water	River Dulais	Nant-y-Cafan CSO, Dulais Valley	116	1,196	97.5
Dwr Cymru Welsh Water	River Camnant	Onllwyn SPS	111	1,117	99.9
Dwr Cymru Welsh Water	River Tawe	Inco CSO Clydach Swansea	114	1,083	99.2
Dwr Cymru Welsh Water	River Ithon	LLANDRINDOD WELLS STW PARK LANE	93	1,061	99.9
Dwr Cymru Welsh Water	Neath Estuary	FABIAN WAY SPS FABIAN WAY SWANSEA	60	974	99.9
Dwr Cymru Welsh Water	River Dulais	YS.MARCH CRYNANT SWO 2C	101	967	86
Dwr Cymru Welsh Water	River Chwefru	CILMERY STW	119	957	99.9
Dwr Cymru Welsh Water	Neath Estuary	Dynevor Junction SPS	108	934	99.9
Dwr Cymru Welsh Water	River Tawe	CSO at Craig Y Duke Trebanos SOC	101	900	99.2
Dwr Cymru Welsh Water	River Usk	BWLCH (S) STW LLANGYNIDIR	107	872	99.7
Dwr Cymru Welsh Water	Usk River	SENNYBRIDGE STW	53	851	99.9
Dwr Cymru Welsh Water	River Caerfanell	TALYBONT SEWAGE TREATMENT WORKS TAL	76	798	99.9
Dwr Cymru Welsh Water	River Cammarch	BEULAH STW BEULAH POWYS WALES	59	754	99.9
Dwr Cymru Welsh Water	River Ithon	CROSSGATES STW	71	750	99.8
Dwr Cymru Welsh Water	River Tawe	YSTRADGYNLAIS WWTW OFF WIND ROAD	48	724	99.8
Dwr Cymru Welsh Water	River Garnant	CSO 27 BOUNDARY RD BRIDGE GARNANT	79	705	99.9
Dwr Cymru Welsh Water	Upper Clydach	CSO at Dilwyn Arms Pontardawe Cross NPT	101	696	99.9
Dwr Cymru Welsh Water	Melin Court Brook	MOSES ROW CSO RESOLVEN NEATH	67	626	99.9
Dwr Cymru Welsh Water	River Neath	RESOLVEN STW STORM TANKS NEATH	67	585	99.2
Dwr Cymru Welsh Water	River Ithon	Llanddewi Toll House	65	547	96.2
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Fairfield SPS, Neath	109	538	99.8
Dwr Cymru Welsh Water	River Irfon	Abernant Lake CSO	70	524	98.2
Dwr Cymru Welsh Water	River Neath	Park Avenue CSO	110	517	97.8
Dwr Cymru Welsh Water	Howey Brook	Howey SPS	62	511	99.9
Dwr Cymru Welsh Water	River Lugg	LLANGUNLLO STW PS	40	509	99.9
Dwr Cymru Welsh Water	River Neath	Chainbridge CSO, Glyn-Neath	67	505	99.2
Dwr Cymru Welsh Water	U Nant Llech	Colbren PS 1 Emerg	89	497	99.8
Dwr Cymru Welsh Water	Nant Helen	STATION RD GWYNFRYNLEN CSO	66	475	94.4
Dwr Cymru Welsh Water	River Garnant	CSO 26 QUARRY PLACE AMMONFORD	75	471	99.8
Dwr Cymru Welsh Water	River Tawe	CSO at Rear of Lonlas Station Road Abercrave	73	426	96.8
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Melincryddan SPS	76	418	99.8
Dwr Cymru Welsh Water	River Neath	Clyne SPS Clyne Neath Neath Port T	57	405	71.4
Dwr Cymru Welsh Water	Nant-Bran	Felin Fran CSO Walters Rd Llansamle	58	398	98.1
Dwr Cymru Welsh Water	River Amman	CSO 22 SW CORNER OF DISUSED TIP	52	386	99.9
Dwr Cymru Welsh Water	River Clydach	Neath Abbey SPS	88	384	96
Dwr Cymru Welsh Water	River Clydach	CSO 27 Farmers Road Pumping Station	68	382	99.9
Dwr Cymru Welsh Water	River Tawe	Pontardawe Leis Centre CSO Swansea	83	377	98.7
Dwr Cymru Welsh Water	Nant-Y-Fendrod	Samlet Rd CSO 103	56	353	99
Dwr Cymru Welsh Water	River Tawe	SWN YR AFON CSO, Ystradgynlais	58	348	94.8
Dwr Cymru Welsh Water	Wye River	BUILTH WELLS STW	46	341	99.9
Dwr Cymru Welsh Water	River Tawe	Rear of Canal Cottage CSO, Abercrave	39	298	96.3
Dwr Cymru Welsh Water	River Neath	CSO AT REAR GODFREY AVENUE GLYNNEATH NPT	78	293	99.9
Dwr Cymru Welsh Water	River Tawe	Pentrechwyth Rd CSO	58	291	99.4
Dwr Cymru Welsh Water	River Wye	The Strand CSO, Church Street, Builth Wells	64	276	99.5
Dwr Cymru Welsh Water	River Usk	GARN PS CRICKHOWELL	53	274	99.8
Dwr Cymru Welsh Water	River Irfon	Cefn Gorwydd Wastewater Treatment Works	69	262	99.3
Dwr Cymru Welsh Water	Upper Clydach River	JAMES STREET CSO	73	260	95.3
Dwr Cymru Welsh Water	River Neath Via Surface Water Sewer	Penrhiwtyn SPS	40	259	99.9
Dwr Cymru Welsh Water	River Irfon	Dolwen Fields CSO	59	254	98.8
Dwr Cymru Welsh Water	Nant Llynfell	SWO.M'HOLE 154A GEORGE IV PH UPPER CSO	48	253	98.8
Dwr Cymru Welsh Water	Tennant Canal	OLD ROAD CSO OLD ROAD SKEWEN NEATH	83	253	99.9
Dwr Cymru Welsh Water	River Tawe	CSO at O/S 17 Glantawe Row Ystradgynlais	74	251	99.1
Dwr Cymru Welsh Water	Nant Hir	CSO at GCG - rear of 40 Ger yr Afon	64	249	91.9
Dwr Cymru Welsh Water	Llynfi River	TALGARTH STW BRONLLYS ROAD TALGARTH	31	244	99.6
Dwr Cymru Welsh Water	River Tawe	SWO.M'HOLE12 CWMTAWE FM PENRHOS	36	244	97.7
Dwr Cymru Welsh Water	River Twrch	CSO 21 BRIDGE STREET	42	241	99.9
Dwr Cymru Welsh Water	Wye River	RHAYADER STW RHAYADER	20	239	99.9
Dwr Cymru Welsh Water	River Wye	Glasbury STW Glasbury Nr Hay On Wye	38	232	99.9
Dwr Cymru Welsh Water	Henllan Brook	CSO at Llanelwedd Primary School Bridge	36	231	99.3
Dwr Cymru Welsh Water	Lower Clydach River	Canal CSO. Towpath Off Hebron Road, Clydach	69	224	99.3
Dwr Cymru Welsh Water	River Wye	Storm Tanks at Rhayader STW	40	216	99.9
Dwr Cymru Welsh Water	Lower Clydach River	Storm Overflow at Heol Eithrim	51	216	97.5
Dwr Cymru Welsh Water	River Tawe	CSO at MH 92 nr Claypon Bridge, Ystradgynlais	35	214	99.4
Dwr Cymru Welsh Water	River Clydach	CSO NO 10 30M U/S ROADBRIDGE	82	214	99.3
Dwr Cymru Welsh Water	River Ithon	CSO OPPOSITE LODORE	65	212	99.9
Dwr Cymru Welsh Water	River Clydach	Rear No 1 Dyffryn V'W Bryn Coch CSO	53	211	99.9
Dwr Cymru Welsh Water	River Tawe	CSO at Ynysmeudw Warehouse (SOC	41	196	90.1
Dwr Cymru Welsh Water	River Tawe	CSO M'HOLE 14 ABERCRAVE ST.DAVIDS C	58	189	98.1
Dwr Cymru Welsh Water	River Neath	CSO 48 NEATH RIVER BRIDGE ADJ CALOR	86	183	99.9
Dwr Cymru Welsh Water	River Usk	Llangynidr (Coed-yr-Ynys) SPS	43	179	98.3
Dwr Cymru Welsh Water	River Tawe	CSO 12 B4599 Road Bridge	59	166	99.8
Dwr Cymru Welsh Water	Tregoyd Brook	Three Cocks Aberllynfi SPS	35	159	99.5
Dwr Cymru Welsh Water	River Dulais	BRYNDULAIS CSO	46	150	99.9
Dwr Cymru Welsh Water	River Usk	SPS at Brecon - Watton 10 Metres South Of	66	136	99.9
Dwr Cymru Welsh Water	Nant Gyrlais	CSO 10 Rear Of Waun Gyrlais Penrhos	39	131	76.7
Dwr Cymru Welsh Water	River Lugg	PRESTEIGNE STW CLATTERBROOM	20	123	99.9
Dwr Cymru Welsh Water	Tennant Canal	CSO 49 LLANGATWG SCHOOL ABERDULIAS	33	123	99.9
Dwr Cymru Welsh Water	Nant Bran	PENIEL GREEN CSO PENIEL GREEN ROAD	33	122	99.4
Dwr Cymru Welsh Water	River Tawe	Glais CSO	36	117	99.9
Dwr Cymru Welsh Water	River Tawe	Glais SPS	36	117	99.9
Dwr Cymru Welsh Water	River Tawe	CSO at Mason Arms, Ystradgynlais	24	116	99.4
Dwr Cymru Welsh Water	River Tawe	Office Row Car Park Ystalyfera CSO	45	116	99.9
Dwr Cymru Welsh Water	River Usk	Legar CSO	32	107	99.3
Dwr Cymru Welsh Water	River Wye	CHURCH LANE STW CHURCH ROAD	18	104	99.5
Dwr Cymru Welsh Water	Unnamed Watercourse	Bronllys Rear of garage A479	48	104	99.1
Dwr Cymru Welsh Water	Esturial Water Of River Neath	Quay Road PS Town Centre Neath	64	104	99.6
Dwr Cymru Welsh Water	River Llynfi	Trefecca Old Railway CSO, Maesgwyn	22	103	99.4
Dwr Cymru Welsh Water	Sea Outfall	BALDWINS CRESCENT SPS	42	102	99.9
Dwr Cymru Welsh Water	Swansea Bay	Swansea Waste Water Treatment Works	10	100	99.9
Dwr Cymru Welsh Water	River Wye	CSO at Rhayader WwTW	41	99	99.9
Dwr Cymru Welsh Water	River Neath	CSO IN FOOTPATH ADJ BETHEL RD	37	94	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of River Neath	Pentreffynnon Sewage Pumping Station at Neath Abbey Ind Estate, Neath	50	93	99.8
Dwr Cymru Welsh Water	River Usk	BRECON SEWERAGE SYSTEM	25	92	97.8
Dwr Cymru Welsh Water	River Ithon	PENYBONT P.S.	15	91	99.9
Dwr Cymru Welsh Water	River Senni	Brodawel - Sennybridge	16	91	98.6
Dwr Cymru Welsh Water	Nant Gelli-Nedd	CSO ADJ 97 CRAIG RD GELLINUDD	40	88	99.7
Dwr Cymru Welsh Water	River Usk	CRICKHOWELL STW ABERGAVENNY ROAD	13	87	99.9
Dwr Cymru Welsh Water	River Neath Via Surface Water Sewer	Plas-Y-Coed CSO, Glynneath	57	81	99.4
Dwr Cymru Welsh Water	River Cammarch	Beulah SPS Beulah Powys	11	80	70.8
Dwr Cymru Welsh Water	River Neath	Gnoll Park Road CSO	71	69	99.4
Dwr Cymru Welsh Water	Irfon	LLANGAMMARCH WELLS STW	9	68	99.4
Dwr Cymru Welsh Water	Neath Estuary	ABERDULAIS SPS	26	68	99.9
Dwr Cymru Welsh Water	River Usk	Brecon Showfields CSO Brecon Powys	23	64	94.4
Dwr Cymru Welsh Water	River Tawe	Bonymaen Rd CSO	52	64	98.4
Dwr Cymru Welsh Water	River Clydach	CSO 8 Bryncoch 7B Bryncoch	15	64	99.9
Dwr Cymru Welsh Water	To Crymlyn Brook Via A Surface Water Culvert	Skewen SPS Park Avenue Lonlas Neath	20	57	99.9
Dwr Cymru Welsh Water	River Tawe	Opp 74 Bonymaen Rd CSO, Swansea ,	49	56	98.6
Dwr Cymru Welsh Water	River Wye	Hay-on-Wye (Main) SPS	40	54	90.2
Dwr Cymru Welsh Water	River Tawe	Pontardawe 2 To R Tawe CSO Swansea	14	53	99.8
Dwr Cymru Welsh Water	River Usk	CRICKHOWELL CSO	10	51	66.4
Dwr Cymru Welsh Water	River Neath	GUNSIGHT OVERFLOW SWO 11 CSO	24	49	99.9
Dwr Cymru Welsh Water	River Ithon	CSO at RIDGEBOURNE CATCHMENT AREA LLANDRI	26	49	85.2
Dwr Cymru Welsh Water	Estuarial Waters Of Llantwit Stream	Llantwit Church SPS	21	48	99.9
Dwr Cymru Welsh Water	River Wye	NEWBRIDGE-ON-WYE STW POWYS	26	43	99.9
Dwr Cymru Welsh Water	River Tawe	Nr Gough Arms MH CSO	14	41	96.7
Dwr Cymru Welsh Water	Tidal River Neath	Llandarcy 36" Outfall	45	40	98.8
Dwr Cymru Welsh Water	River Neath	Cadoxton Road CSO Cadoxton Road	3	39	99.9
Dwr Cymru Welsh Water	River Clydach	Longford Road Neath Abbey CSO	14	32	99.8
Dwr Cymru Welsh Water	Gnoll Brook	CSO 33 CIMLA ROAD CIMLA NEATH	12	31	98.9
Dwr Cymru Welsh Water	Nant Y Llechau	CSO Near Delffordd	17	30	97.8
Dwr Cymru Welsh Water	River Dulais	CSO Outside Visitor Centre, Aberdulais	7	30	99.9
Dwr Cymru Welsh Water	Sea Outfall	TEMPORARY INCREASED DIS. FROM	10	30	99.5
Dwr Cymru Welsh Water	River Neath	Commercial Road Sewage Pumping Station	34	28	99.9
Dwr Cymru Welsh Water	Tennant Canal	Church Road CSO Church Road Neath	7	26	99.9
Dwr Cymru Welsh Water	Nant-Y-Fendrod	DRUMAU FARM BIRCHGROVE RD P.S. CSO	14	26	99.9
Dwr Cymru Welsh Water	Crymlyn Bog	CSO HALFWAY CRYMLYN ROAD PS	12	26	95.6
Dwr Cymru Welsh Water	River Neath	HEOL ILLTYD CSO BRYNCOCH NPT	9	26	99.9
Dwr Cymru Welsh Water	River Lugg	CSO at Presteigne - O/S SPS Tanyard	35	26	99
Dwr Cymru Welsh Water	Nant Menascin	100 YARDS D/S OF LLANFRYNACH STW	10	24	99.9
Dwr Cymru Welsh Water	River Usk	CRICKHOWELL - BRIDGE END CAR P	3	24	99.9
Dwr Cymru Welsh Water	Nant Bran Via Culverted Watercourse	Heol Dulais CSO at Birchgrove	11	20	99.5
Dwr Cymru Welsh Water	River Clydach	Monastery Road Cso (Cso 35) Neath	14	20	86.8
Dwr Cymru Welsh Water	River Ithon	CSO at Ithon Road, Llandrindod Wells	16	19	99.9
Dwr Cymru Welsh Water	River Tawe	CSO Godre'r Graig SOC 20. Godre'r	13	19	99.9
Dwr Cymru Welsh Water	Caerfanell	Talybont Across from Cattle Market CSO	15	17	99
Dwr Cymru Welsh Water	Hollins Clough Ditch	CSO 9 CIMLA COMMON CIMLA NEATH	6	17	99.9
Dwr Cymru Welsh Water	Eastland Brook	St Joseph's Church CSO	15	17	99.9
Dwr Cymru Welsh Water	Nant Bran Via Culvert	Trallwyn Community Centre CSO	31	14	95.2
Dwr Cymru Welsh Water	River Wye	CSO Llanelwedd - Scout Hut Station Road	2	11	96.9
Dwr Cymru Welsh Water	Felindre Brook	Three Cocks	4	10	100
Dwr Cymru Welsh Water	Neath - Conf With Nedd Fechan And Mellte To Tl	CSO at Resolven Above Clydach Brook	17	8	99.9
Dwr Cymru Welsh Water	River Wye	North Road CSO North Rd Builth Well	11	8	100
Dwr Cymru Welsh Water	River Ennig	CSO at Talgarth o/s Autumn lodge	6	6	100
Dwr Cymru Welsh Water	Nant Bran	Adj 27 Bethel Rd Llansamlet CSO	5	4	91.7
Dwr Cymru Welsh Water	Surface Water Culvert, An Nant Bran	Birchgrove Road CSO	9	4	95.9
Dwr Cymru Welsh Water	River Llynfi	A479 Bronlly Road CSO	6	4	99.5
Dwr Cymru Welsh Water	Neath Canal	Park Street CSO Park Street Tonna	10	4	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of Swansea Ba	SWO. QUEENS DOCK (POINT 92 NEW	10	2	99.9
Dwr Cymru Welsh Water	River Usk	Brynawel Estate, Trecastle CSO	2	1	97.3
Dwr Cymru Welsh Water	River Usk	Bridge St CSO	5	1	22.5
Dwr Cymru Welsh Water	Neath - Conf With Nedd Fechan And Mellte To Tl	Adj Health Centre CSO, Dyfed Rd	5	1	96.6
Dwr Cymru Welsh Water	Nant Ddu	Cray Sewage Treatment Works	1	1	99.9
Dwr Cymru Welsh Water	Nant Y Fendrod - Headwaters To Conf With Tawe	Birchgrove CSO	4	1	99.8
Dwr Cymru Welsh Water	River Wye	CSO at Rhayader Fields St. Brides Church	4	1	99.1
Dwr Cymru Welsh Water	River Usk	Crickhowell - Bullpit Meadow S CSO	4	1	99.9
Dwr Cymru Welsh Water	River Tawe	Heol Y Nant/Sybil Street Clydach CSO	4	1	79.2
Dwr Cymru Welsh Water	River Usk Via Surface Water Sewer	Brecon Supermarket CSO	2	0	99.2
Dwr Cymru Welsh Water	River Ithon	Llanyre Wastewater Treatment Works	1	0	99.9
Dwr Cymru Welsh Water	River Lugg	Tanyard Pumping Station CSO/EO	1	0	100
Dwr Cymru Welsh Water	Tennant Cannal	CSO at R/O 38 Caenant Terrace, Neath	1	0	100
Dwr Cymru Welsh Water	River Wye	CSO at Weun Chapel Park Toilets, Rhayader	0	0	100
Dwr Cymru Welsh Water	Grywne Fawr	CWRT Y GOLLEN SPS CRICKHOWELL	0	0	99.9
Dwr Cymru Welsh Water	River Wye	Hay-on-Wye (Warren Close) SPS	0	0	99.8
Dwr Cymru Welsh Water	River Wye	LLYSWEN STW CHURCH ROAD LLYSWEN	0	0	99.9
Dwr Cymru Welsh Water	River Dulais	BRYNDULAIS (SWO 2A)	0	0	0
Dwr Cymru Welsh Water	River Tawe	CSO at QUARRY ROAD CLYDACH (POINT 125)	0	0	75.9
Dwr Cymru Welsh Water	Unnamed Stream To Tennant Canal	New Road Nursing Home CSO, Skewen	0	0	100

It's a Dirty Business

Brycheiniog Tawe Nedd

Polluted by sewage 8,306 times in 2025 lasting 60,658 hours - That's 7.02 years!

Monitoring was disabled in some locations, so could be more

Brycheiniog Tawe Nedd

Select Another Constituency

Totals for Brycheiniog Tawe Nedd in 2025

172 Sites polluted by Dwr Cymru Welsh Water

Change Over Time

Senedd Constituencies near Brycheiniog Tawe Nedd

Westminster Constituencies within Brycheiniog Tawe Nedd

Take Action

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Pollution Summary 2025

Data Sources & Accuracy

Media Queries

Please Support Us

It's a Dirty Business

Brycheiniog Tawe Nedd Polluted by sewage 8,306 times in 2025 lasting 60,658 hours - That's 7.02 years! Monitoring was disabled in some locations, so could be more

Brycheiniog Tawe Nedd

Select Another Constituency

Totals for Brycheiniog Tawe Nedd in 2025

172 Sites polluted by Dwr Cymru Welsh Water

Change Over Time

Senedd Constituencies near Brycheiniog Tawe Nedd

Westminster Constituencies within Brycheiniog Tawe Nedd

Take Action

We need your support!

Pollution Summary 2025

Data Sources & Accuracy

Media Queries

Please Support Us

Brycheiniog Tawe Nedd

Polluted by sewage 8,306 times in 2025 lasting 60,658 hours - That's 7.02 years!

Monitoring was disabled in some locations, so could be more