Carmarthen West and South Pembrokeshire was polluted by sewage 5,799 times in 2023
lasting 57,445 hours - that's 6.65 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 Carmarthen West and South Pembrokeshire in 2023

81 Sites polluted by Dwr Cymru Welsh Water

5,799 sewage dumps
57,445 h duration

That's 6.65 years! On average 15.9 times a day

Change Over Time

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Constituencies near Carmarthen West and South Pembrokeshire

Waterways in Carmarthen West and South Pembrokeshire

Pollution Summary 2023

Here are all the reported sewage overflow totals for Carmarthen West and South Pembrokeshire 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 2 of the total 87 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Cresswell	Langdon STW Settled Storm	237	4,422	99.9
Dwr Cymru Welsh Water	Carew River	Carew WwTW Carew Pembrokeshire Settled Storm	234	4,160	99.4
Dwr Cymru Welsh Water	Cosheston Pill	COSHESTON STW . .	321	3,857	98.1
Dwr Cymru Welsh Water	River Cwm-Waun-Gron	TAVERNSPITE STW	163	3,366	99.9
Dwr Cymru Welsh Water	Angle Bay	Angle WWTW Pembroke Pembrokeshire Setteld Storm	147	2,674	100
Dwr Cymru Welsh Water	River Cynin	St Clears Sewage Pumping Station	181	2,615	81.8
Dwr Cymru Welsh Water	River Taf	WHITLAND WWTW	157	2,572	100
Dwr Cymru Welsh Water	River Duad	SPS at Cwmduad STW	137	2,570	100
Dwr Cymru Welsh Water	Coastal Waters At Saundersfoot	SAUNDERSFOOT STW/PS SAUNDERSFOOT	127	2,228	99.6
Dwr Cymru Welsh Water	Ford'S Lake	TEMPLETON STW STORM	162	2,103	100
Dwr Cymru Welsh Water	Milford Haven	ANGLE VILLAGE PS	111	1,760	98.5
Dwr Cymru Welsh Water	River Cynin	TRELECH STW TRELECH CARMARTHEN ,	128	1,592	99.9
Dwr Cymru Welsh Water	River Taf	CRAIGWEN PS TENBY ROAD ST CLEARS	98	1,526	100
Dwr Cymru Welsh Water	River Gwili	Storm Overflow at Llanpumsaint Wastewater Treatment Works	123	1,351	100
Dwr Cymru Welsh Water	Trelissey Stream	RED ROSES STW	105	1,183	100
Dwr Cymru Welsh Water	Tawelan Brook	Settled Storm Overflow at Brickyard Lane Pumping Station	144	1,173	100
Dwr Cymru Welsh Water	Culverted Mackerel Lake Stream	WOGAN MEWS CSO LAUGHARNE CARMS	98	1,095	95.7
Dwr Cymru Welsh Water	Groundwater Via Infiltration System	PENDINE SEWAGE TREATMENT WORKS	130	1,078	99.9
Dwr Cymru Welsh Water	U River Towy	Pencoed Farm SPS, Llangain	87	1,059	100
Dwr Cymru Welsh Water	Pembroke River	HUNDLETON WWTW INLET STORM OVERFLOW	142	1,050	100
Dwr Cymru Welsh Water	Nant Hedfron, River Taf	LLANDDOWROR VILLAGE P.S	91	1,019	99.8
Dwr Cymru Welsh Water	Tywi Estuary	Jewsons CSO Tanerdy Carmarthen	115	927	99.9
Dwr Cymru Welsh Water	Nant Pwntan	PWNTAN SPS LLANGAIN CARMARTHENSHIRE	53	760	100
Dwr Cymru Welsh Water	River Towy	Morfa Lane CSO, Carmarthen	149	735	99.7
Dwr Cymru Welsh Water	Narberth Brook	NARBERTH WEST STW	90	708	99.3
Dwr Cymru Welsh Water	Towy	Carmarthen Old Llansteffan Rd CSO	148	648	99.8
Dwr Cymru Welsh Water	Manorbier Bay	MANORBIER TRANSFER PS MANORBIER TE	57	607	100
Dwr Cymru Welsh Water	River Ritec	STORM TANKS AT TENBY HEADWORKS TE	69	603	99.8
Dwr Cymru Welsh Water	U Creswell River	Broadmoor Sewage Pumping Station	50	534	100
Dwr Cymru Welsh Water	New Inn Stream	AMROTH AND SUMMERHILL SCHEME PS 2	51	510	99.9
Dwr Cymru Welsh Water	River Tywi	CSO Pothouse Wharf PS	98	474	100
Dwr Cymru Welsh Water	River Taf	Whitland Terminal Pumping Station CSO and EO	91	435	100
Dwr Cymru Welsh Water	River Gwili	Cwmdwyfran SPS	62	407	99.8
Dwr Cymru Welsh Water	Coastal Wtrs Nr Stackpole Quay	STACKPOLE STW STACKPOLE	35	388	100
Dwr Cymru Welsh Water	Bosherton Lake	STACKPOLE STW (EMERGENCY) STACKPOLE	33	385	100
Dwr Cymru Welsh Water	Nant Gochen	Cynwyl Village Bridge	25	364	94.9
Dwr Cymru Welsh Water	River Marlais	CSO at Narberth East SPS	44	336	100
Dwr Cymru Welsh Water	River Towy	SPS at Castle Hill Drainage Area	107	335	99.6
Dwr Cymru Welsh Water	Nant Corrwg	Brynmeillion SPS Llanpumsaint	54	334	100
Dwr Cymru Welsh Water	River Duad	Cynwyl Elfed WwTW Cynwyl Elfed Carm Settled Storm	34	328	99.9
Dwr Cymru Welsh Water	Tywi Estuary	Old Priory Row CSO Parc Hinds PS C	110	312	100
Dwr Cymru Welsh Water	Narberth Brook	NARBERTH BRIDGE CSO	98	256	100
Dwr Cymru Welsh Water	River Gronw	15 Meters D/S Whitland Bridge CSO	74	215	96.8
Dwr Cymru Welsh Water	Radford Pill	CAREW/MILTON WWTWS PEMBROKESHIRE	62	204	96.1
Dwr Cymru Welsh Water	Cresswell River	BEGELLY CS0 BEGELLY KILGETTY	44	201	100
Dwr Cymru Welsh Water	Tawelan Brook	Carmarthen Pentremeurig Road CSO	83	199	84.8
Dwr Cymru Welsh Water	River Gronw	CSO at Llanboidy WwTW	38	194	99.9
Dwr Cymru Welsh Water	River Ritec	STORM TANKS AT TENBY HEADWORKS TE	16	186	99.8
Dwr Cymru Welsh Water	River Gwili	Storm Overflow at Bronwydd Wastewater Treatment Works	25	150	99.9
Dwr Cymru Welsh Water	Tawelan Brook	CSO AT JOBSWELL ROAD	75	146	92.8
Dwr Cymru Welsh Water	Fords Lake Stream	KILGETTY EAST PS KILGETTY EAST WWTW	23	139	16.4
Dwr Cymru Welsh Water	Saundersfoot Stream	SAUNDERSFOOT STW/PS SAUNDERSFOOT	56	122	99.5
Dwr Cymru Welsh Water	Llanion Pill, Milford Haven	WATER ST P'BROKE DK SWO	94	100	93.5
Dwr Cymru Welsh Water	River Towy	CARMARTHEN - STATION ROAD PUMP	114	96	99.8
Dwr Cymru Welsh Water	River Coran	LAUGHARNE SEWERAGE SYSTEM	69	85	95.7
Dwr Cymru Welsh Water	An Unnamed Stream	NEW HEDGES PS ROWSTON HOLIDAY PARK	25	75	100
Dwr Cymru Welsh Water	Taf Estuary	LAUGHARNE WWTW (STW) LAUGHARNE	59	67	99.6
Dwr Cymru Welsh Water	Pembroke River / Milford Haven	Penanr Fleet Street MH 4101 CSO	21	65	99.9
Dwr Cymru Welsh Water	River Tywi	Park Hinds CSO	17	61	100
Dwr Cymru Welsh Water	Milford Haven	(B)MEYRICK ST SWO PEMBROKE DOCK	18	43	99.4
Dwr Cymru Welsh Water	Castle Pond	Mill Bridge CSO	44	39	99.4
Dwr Cymru Welsh Water	Saundersfoot Stre	VALLEY RD P S'S (4 & 4A) SAUNDERSFO	20	38	99.9
Dwr Cymru Welsh Water	Castle Pond	St Nicholas Crescent CSO, Pembroke	26	33	99.8
Dwr Cymru Welsh Water	Un-Named Stream	PENALLY SEWAGE PUMPING STATION	15	31	99.8
Dwr Cymru Welsh Water	Knightson Brook	LAMACK VALE PS LAMACK VALE TENBY ,	11	17	100
Dwr Cymru Welsh Water	Colby Stream	AMROTH AND SUMMERHILL SCHEME PS	5	16	100
Dwr Cymru Welsh Water	Cocheston Pill - Headwaters To Tidal Limit	Fleet St MH2103 CSO, Pennar	18	12	99.9
Dwr Cymru Welsh Water	Freshwater East Stream	FRESHWATER OUTFALL PUMPING STATION	2	11	100
Dwr Cymru Welsh Water	Pembroke River	Pembroke Dock Sycamore Street CSO	18	8	98.4
Dwr Cymru Welsh Water	Milford Haven Waterway	Pembroke Dock STW(Emergency) Fort	4	6	100
Dwr Cymru Welsh Water	Saundersfoot Stream	BROOKLANDS PLACE SPS	5	6	99.9
Dwr Cymru Welsh Water	Saundersfoot Stream	MILFORD ST P S'S (1 & 1A) SAUNDERSF	6	5	100
Dwr Cymru Welsh Water	Pembroke River	Lamphey WWTW Lamphey Near Pembroke Settled Storm	1	3	99.5
Dwr Cymru Welsh Water	Saundersfoot Stream	MILFORD STREET SPS	5	3	100
Dwr Cymru Welsh Water	Coastal Waters	TENBY LIFEBOAT CSO CASTLE SQ TENBY	2	1	100
Dwr Cymru Welsh Water	Tawelan	Carmarthen Near Fire Station CSO	3	1	100
Dwr Cymru Welsh Water	River Tywi	Carmarthen Market CSO	1	0	99.8
Dwr Cymru Welsh Water	Esturial Waters Of Pembroke River	Pembroke SPS	1	0	100
Dwr Cymru Welsh Water	Upper Mill Pond	CSO at Holyland Rd Pembroke MH 1301	1	0	99.1
Dwr Cymru Welsh Water	Downstream Barrage / Pembroke River	Pembroke Town - Monkton Bridge CSO	1	0	100
Dwr Cymru Welsh Water	River Cywyn	Settled Storm Tank at Bancyfelin STW	1	0	99.9
Dwr Cymru Welsh Water	River Taf	Llangynog STW	0	0	0
Dwr Cymru Welsh Water	Pont-Shan Brook	LLANDDEWI VELFREY STW NARBERTH PEMB	0	0	0
Dwr Cymru Welsh Water	Lower Mill Pond	CSO WOODBINE CLOSE PEMBROKE	0	0	100
Dwr Cymru Welsh Water	Un-Named Stream	LYDSTEP PS	0	0	100
Dwr Cymru Welsh Water	Stream Above Beach	THE GLEN SAUNDERSFOOT PS . .	0	0	100
Dwr Cymru Welsh Water	Tawelon Brook	Pentremeurig Road CSO	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

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