Top of the Poops | Senedd Constituency Sewage Map | Gŵyr Abertawe

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Totals for Gŵyr Abertawe in 2025

87 Sites polluted by Dwr Cymru Welsh Water

3,103 sewage dumps

20,179 hours duration

That's 2.34 years. On average 8.5 times a day

Change Over Time

Senedd Constituencies near Gŵyr Abertawe

Westminster Constituencies within Gŵyr Abertawe

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 Gŵyr Abertawe 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	Loughor Est'Y	LLANNANT WWTW LLANNANT ROAD SWANSEA	122	2,061	99.9
Dwr Cymru Welsh Water	River Loughor	GARNSWLLT STW LONGELIN AMMANFORD	103	1,864	99.9
Dwr Cymru Welsh Water	Estuarial Waters Of Swansea Ba	MUMBLES SPS KNAB ROCK MUMBLES SWANS	111	1,537	99.9
Dwr Cymru Welsh Water	River Lliw	Pont-y-cob Road CSO	120	1,028	98.3
Dwr Cymru Welsh Water	Loughor Estuary	SSO. PENCLAWDD SEWERAGE SCHEME	90	934	98.1
Dwr Cymru Welsh Water	River Tawe	CSO Ynysforgan Roundabout	81	861	99.9
Dwr Cymru Welsh Water	Burry Pill	Reynoldson WwTW Settled Storm	34	810	100
Dwr Cymru Welsh Water	Burry Pill	REYNOLDSTON WASTEWATER TREATMENT WK	65	794	99.8
Dwr Cymru Welsh Water	River Llan	Cuckoo Mill SPS	48	774	98.1
Dwr Cymru Welsh Water	River Lliw	CSO BACH Y GWREIDDYN FARM PONTLLIW	140	723	72.6
Dwr Cymru Welsh Water	River Tawe Esturial Waters	OUTFALL 'M' THE TAWE BARRAGE SWANS	68	695	99.9
Dwr Cymru Welsh Water	River Tawe	CSO Ynystawe (Point 86 New Ma)	96	688	97.8
Dwr Cymru Welsh Water	River Tawe	WYCHTREE STREET CSO MORRISTON	79	663	99.9
Dwr Cymru Welsh Water	Burry Estuary	New Penclawdd Sewage PS Penclawdd	43	530	99.5
Dwr Cymru Welsh Water	Burry Pill	SCURLAGE SPS SCURLAGE SWANSEA	24	400	99.9
Dwr Cymru Welsh Water	Loughor Estuary	GOWERTON WwTW	49	361	99.9
Dwr Cymru Welsh Water	River Lliw	Rhosog P.S	61	333	99.9
Dwr Cymru Welsh Water	River Tawe	CSO 70 A4067 Nthbnd Landore Swansea	92	315	99.9
Dwr Cymru Welsh Water	Burry Pill	LLANMADOC P.S.NO 2 EMERGEN	24	294	99.8
Dwr Cymru Welsh Water	Culvert Of Bwrlais Brook	CWMBWRLA CSO CWMBWRLA RBOUT SWANSEA	53	292	99
Dwr Cymru Welsh Water	River Llan	CWMBACH ROAD CSO COCKETT SWANSEA	79	277	98.9
Dwr Cymru Welsh Water	Loughor	Grovesend PS	64	260	99.8
Dwr Cymru Welsh Water	Loughour Estuary	BEN HUGHES FOUNDRY CSO OPP REV JAME	72	255	99.3
Dwr Cymru Welsh Water	Estuary	LLANRHIDIAN PS EMERG , ,	73	254	99.9
Dwr Cymru Welsh Water	Loughor	PONTARDULAIS PS EMERG , ,	35	234	99.9
Dwr Cymru Welsh Water	Coastal Water At Brandy Cove	BISHOPSTON STS BRANDY COVE LANE	18	210	99.8
Dwr Cymru Welsh Water	River Lliw	KINGSBRIDGE CSO GORSEINON SWANSEA	58	210	99.9
Dwr Cymru Welsh Water	Morlais River	New Crofty C Sewage PS Crofty Gower Crofty C SPS	30	178	95.2
Dwr Cymru Welsh Water	River Llan	CSO, Denver R’D Into Culvert Swansea	89	150	99.9
Dwr Cymru Welsh Water	Clyne River	Railway Inn SPS, Killay	21	146	99.9
Dwr Cymru Welsh Water	Surface Water Sewer To Cwm Gelli Stream	CSO 64A PENLANFACH BRYNHYFRYD	65	145	100
Dwr Cymru Welsh Water	River Lliw	CSO APX 70YDS U/S R'WAY B'GE U	43	134	80.4
Dwr Cymru Welsh Water	Swansea Bay	OUTFALL A (CSO 201) JUN OF MUMBLES	13	110	97.5
Dwr Cymru Welsh Water	River Lliw	Gorseinon Factory CSO	25	107	99.3
Dwr Cymru Welsh Water	Swansea Bay	Duns Lane/Park street CSO	26	105	99.7
Dwr Cymru Welsh Water	Unnamed Stream	HILLEND LLANGENNITH P.S. SSO	25	102	99.9
Dwr Cymru Welsh Water	River Llan	Blaenymaes Drive CSO	44	97	99
Dwr Cymru Welsh Water	Illston Stream Killy Willy	PENNARD SPS OFF PENNARD DR SWANSEA	15	93	99.8
Dwr Cymru Welsh Water	Swansea Bay	SWO. NEAR NORTON AVENUE (POINT	71	90	98.9
Dwr Cymru Welsh Water	River Llwchwr	CSO .400 YDS D/S Cluence Dulai	13	80	99.5
Dwr Cymru Welsh Water	River Clyne	CSO NO 34 REAR OF FURZELAND DRIVE S	20	75	97.7
Dwr Cymru Welsh Water	Culvert Of Cwm Gelli Stream	BRYNHYFRYD CSO LLANGYFELACH ROAD	54	74	99.9
Dwr Cymru Welsh Water	Clyne River	HEN PARC LANE PUMPING STATION	21	69	97.6
Dwr Cymru Welsh Water	Estuarial Waters Of Swansea Ba	SWO. NEAR H.M. PRISON (POINT 6	35	67	99.9
Dwr Cymru Welsh Water	An River Llan	BLAEN Y MAES POINT 65 CSO SWANSEA	36	66	99.8
Dwr Cymru Welsh Water	Unnamed Stream To Loughor Estu	CSO BRYNAFON ROAD GORSEINON SWANSEA	12	65	99.8
Dwr Cymru Welsh Water	Sea	SWO. 50 YARDS BELOW SHELL GARA KNEL	38	63	91.6
Dwr Cymru Welsh Water	Nant Melyn Via The Surface Water Sewer	CSO 73 CROWN ST MORRISTON SWANSEA	53	58	99.3
Dwr Cymru Welsh Water	Burry Estuary	BENSON ROAD CSO BENSON RD PENCLAWDD	15	54	99.8
Dwr Cymru Welsh Water	Culvert Of Burlais Brook	CSO 119 CWM ROAD HAFOD SWANSEA	56	52	99.8
Dwr Cymru Welsh Water	River Llan	CSO BRYNMOR RD SOC11 GOWERTON S124	39	47	99.7
Dwr Cymru Welsh Water	Loughor Estuary	Holythorne Crofty B Sewage PS	18	44	97.5
Dwr Cymru Welsh Water	Dulais	Rear of No1 St Teilo St, Pontardulais	11	33	99.7
Dwr Cymru Welsh Water	River Llan	Skomer Place CSO, Blaen Y Maes	24	27	99.8
Dwr Cymru Welsh Water	Cwmrhydyceirw Brook Via Surface Water Network	CSO 80 Pentrpoeth Rd Morriston	51	21	100
Dwr Cymru Welsh Water	Surface Water Sewer Draining To Gors-Fawr Brook	CSO at Junction of Brithwen Rd & Swansea Rd	20	18	79.6
Dwr Cymru Welsh Water	River Clyne	CSO SKETTY PARK DRIVE SWANSEA ,	12	18	99.9
Dwr Cymru Welsh Water	River Llan	Station Road CSO, Pen Y Cwm Swansea	32	18	98.5
Dwr Cymru Welsh Water	Nant Cwm Gelli	MYNYDDGARNLLWYD CSO SWANSEA	27	15	99.8
Dwr Cymru Welsh Water	River Llan	Cadleroad Road CSO	21	12	99.6
Dwr Cymru Welsh Water	Nant Cwmgelli Via Surface Water Drains	CSO at Penlan Cresent (Point 52A) Swansea	25	11	99.7
Dwr Cymru Welsh Water	River Llan	Mynydd Newydd Rd CSO	9	7	100
Dwr Cymru Welsh Water	Culvert Of Cwm Gelli Stream	CSO 69 TRWYDDFA ROAD SWANSEA	16	6	99.8
Dwr Cymru Welsh Water	Swansea Bay	OUTFALL D1 (CSO 10) JUN OF MUMBLES	11	5	99.9
Dwr Cymru Welsh Water	Washinghouse Brook	ELMGROVE ROAD CSO	3	3	99.9
Dwr Cymru Welsh Water	River Llan Via Surface Water Sewer	FFORD-Y-BRAIN/PORT TALBOT PLACE CSO	6	3	99.9
Dwr Cymru Welsh Water	Coastal Waters At Overton Mere	OVERTON STW PORT EYNON	1	3	99.8
Dwr Cymru Welsh Water	River Llan Via Surface Water Sewer	Cadle Common CSO	2	3	99.9
Dwr Cymru Welsh Water	Swansea Bay	FAIRWOOD RD/LYNDEN TREE P H SWANSEA	9	2	98.5
Dwr Cymru Welsh Water	Swansea Bay	Sketty Green CSO	3	2	100
Dwr Cymru Welsh Water	River Llan	Camarthen Rd CSO	3	1	99.8
Dwr Cymru Welsh Water	Brynmill Stream	Singleton Park Point 24 CSO	3	1	99.9
Dwr Cymru Welsh Water	Loughor Estuary Via Surface Water Sewer	HEOL PENTRE BACH CSO GORSEINON	3	1	99.5
Dwr Cymru Welsh Water	Limeslade Bay	LIMESLADE PUMPING STATION SWANSEA	5	1	99.8
Dwr Cymru Welsh Water	Nant Melyn Via The Surface Water Sewer	CSO 72 Slate St Morriston Swansea	4	1	100
Dwr Cymru Welsh Water	River Lliw	GORSEINON 2 S121 BAKO CSO GORSEINON	2	1	99.5
Dwr Cymru Welsh Water	Langland Bay	LANGLAND SPS LANGLAND SWANSEA	3	1	100
Dwr Cymru Welsh Water	A Culvert Of Burlais Brook	CSO 60 Gors Avenue Swansea	4	1	100
Dwr Cymru Welsh Water	Brynmill Stream	CSO AT GLANBRYDAN AVENUE	2	1	100
Dwr Cymru Welsh Water	Loughor Estuary	Cefn Stylle P.S. Gowerton	2	0	99.9
Dwr Cymru Welsh Water	Swansea Bay	Storm Overflow at Outfall G via CSO 16	2	0	100
Dwr Cymru Welsh Water	Swansea Bay	OUTFALL E (CSO 14) JUN OF MUMBLES R	2	0	99.8
Dwr Cymru Welsh Water	Nant Melyn Via The Surface Water Sewer	CSO 81 CWM BATH ROAD MORRISTON	2	0	99.7
Dwr Cymru Welsh Water	River Clyne	CSO NO 21 DERWEN FAWR ROAD SKETTY S	1	0	100
Dwr Cymru Welsh Water	Loughor Estuary Via Surface Water Sewer	Borough Road CSO Gorseinon Swansea	1	0	99.2
Dwr Cymru Welsh Water	River Tawe	CSO Near Chemical Rd. Morriston	1	0	99.8
Dwr Cymru Welsh Water	Swansea Bay	OUTFALL K (CSO 264) JUN OF MUMBLES	1	0	100
Dwr Cymru Welsh Water	Not Permitted	BISHOPSTON G CHURCH LANE PS	0	0	99.9
Dwr Cymru Welsh Water	Caswell Bay	CASWELL BAY CAR PARK SPS CASWELL	0	0	99.7
Dwr Cymru Welsh Water	River Llan	Kingsway CSO	0	0	85
Dwr Cymru Welsh Water	Burry Pill.	LLANMADOC PS NO. 1 EMERGEN	0	0	99.9
Dwr Cymru Welsh Water	Swansea Bay	OFF LLIPUT LANE POINT 130 CSO SWAN	0	0	100
Dwr Cymru Welsh Water	Coastal Waters At Overton Mere	OVERTON STW PORT EYNON	0	0	100
Dwr Cymru Welsh Water	Sea	BRYNYMOR ROAD/WESTBURY RD POINT 28	0	0	100
Dwr Cymru Welsh Water	Cwm Gelli Stream, River Tawe	CSO 69A Heol Nant Gelli Swansea	0	0	96.6

It's a Dirty Business

Gŵyr Abertawe

Polluted by sewage 3,103 times in 2025 lasting 20,179 hours - That's 2.34 years!

Gŵyr Abertawe

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Totals for Gŵyr Abertawe in 2025

87 Sites polluted by Dwr Cymru Welsh Water

Change Over Time

Senedd Constituencies near Gŵyr Abertawe

Westminster Constituencies within Gŵyr Abertawe

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Pollution Summary 2025

Data Sources & Accuracy

Media Queries

Please Support Us

It's a Dirty Business

Gŵyr Abertawe Polluted by sewage 3,103 times in 2025 lasting 20,179 hours - That's 2.34 years!

Gŵyr Abertawe

Select Another Constituency

Totals for Gŵyr Abertawe in 2025

87 Sites polluted by Dwr Cymru Welsh Water

Change Over Time

Senedd Constituencies near Gŵyr Abertawe

Westminster Constituencies within Gŵyr Abertawe

Take Action

We need your support!

Pollution Summary 2025

Data Sources & Accuracy

Media Queries

Please Support Us

Gŵyr Abertawe

Polluted by sewage 3,103 times in 2025 lasting 20,179 hours - That's 2.34 years!