Caerfyrddin was polluted by sewage 9,821 times in 2024
lasting 88,840 hours - that's 10.28 years!

Constituency

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✔ means we have experimental daily data since 2023

Totals for Caerfyrddin in 2024

130 Sites polluted by Dwr Cymru Welsh Water

9,821 sewage dumps
88,840 h duration

That's 10.28 years! On average 26.9 times a day

Change Over Time

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Constituencies near Caerfyrddin

Waterways in Caerfyrddin

Pollution Summary 2024

Here are all the reported sewage overflow totals for Caerfyrddin in 2024. 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 0 of the total 137 CSO locations had reporting enabled for less than half the year, of which 0 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Marlais	CSO 6 NR BRYN MARLAIS FARM	256	4,812	98.1
Dwr Cymru Welsh Water	River Bran	LLANDOVERY WASTEWATER TREATMENT	185	3,260	99.5
Dwr Cymru Welsh Water	River Teifi	RHYDFACH PS	163	3,142	99.8
Dwr Cymru Welsh Water	River Taf	WHITLAND WWTW	183	2,949	99.8
Dwr Cymru Welsh Water	River Sannan	LLANFYNYDD STW	222	2,862	99.6
Dwr Cymru Welsh Water	River Lash	PENYGROES WWTW SSO PONTLASH	190	2,803	98.9
Dwr Cymru Welsh Water	River Marlais	CARMEL WWTW CARMEL	158	2,731	98.9
Dwr Cymru Welsh Water	River Cothi	PONT-AR-GOTHI & NANTGAREDIG WWTW	148	2,722	99.8
Dwr Cymru Welsh Water	River Gwili	Storm Overflow at Bronwydd Wastewater Treatment Works	148	2,624	98.3
Dwr Cymru Welsh Water	River Cynin	St Clears Sewage Pumping Station	201	2,483	99.8
Dwr Cymru Welsh Water	River Loughor	CSO 14/43 PONT Y CLERC Rd AMMANFORD	152	2,374	91.5
Dwr Cymru Welsh Water	River Cwm-Waun-Gron	TAVERNSPITE STW	104	2,270	99.9
Dwr Cymru Welsh Water	River Twrch	GEORGE IV CSO 23 UPPER CWMTWRCH	126	1,945	99.8
Dwr Cymru Welsh Water	River Tyweli	PENCADER STW STORM TANKS	93	1,856	99.9
Dwr Cymru Welsh Water	River Amman	CSO 33 5M DOWNSTREAM OF PIPE BRIDGE	150	1,833	99.8
Dwr Cymru Welsh Water	River Teifi	CSO at Pentrecwrt STW	227	1,789	99.8
Dwr Cymru Welsh Water	River Tywi	Cwm Ifor Wastewater Treatment Works	123	1,778	99.2
Dwr Cymru Welsh Water	River Marlas	McKays Crossing CSO	149	1,758	92
Dwr Cymru Welsh Water	River Duad	SPS at Cwmduad STW	95	1,625	98.2
Dwr Cymru Welsh Water	U River Towy	Pencoed Farm SPS, Llangain	97	1,502	99.4
Dwr Cymru Welsh Water	River Cwm Wuan Gron	TAVERNSPITE STW	96	1,385	100
Dwr Cymru Welsh Water	River Tywi	FFAIRFACH STW	112	1,356	98
Dwr Cymru Welsh Water	River Tywi	Ashfield Road P.S. Ashfield Llangado	68	1,325	93.1
Dwr Cymru Welsh Water	River Teifi	CENARTH PS	82	1,144	99.2
Dwr Cymru Welsh Water	Nant Rhydian-Ddu	Porthyrhyd PS	96	1,141	99.6
Dwr Cymru Welsh Water	River Gwenlais	Storm Overflow at Cilycwm Wastewater Treatment Works	103	1,092	99.9
Dwr Cymru Welsh Water	River Marlais	CSO 4 Manhole 225A Adj 3 Rawlings	64	1,082	98.4
Dwr Cymru Welsh Water	River Towy	CSO at FFAIRFACH STW	52	1,032	100
Dwr Cymru Welsh Water	Gwili	BRONWYDD STW	81	957	98.1
Dwr Cymru Welsh Water	River Tywelli	PENCADER STW	62	924	85.9
Dwr Cymru Welsh Water	River Amman	CSO Near 11 Upper Station Rd	111	910	99.8
Dwr Cymru Welsh Water	River Taf	CRAIGWEN PS TENBY ROAD ST CLEARS	82	899	97.9
Dwr Cymru Welsh Water	River Teifi	PENTRECWRT STW	88	841	99.1
Dwr Cymru Welsh Water	River Teify	CSO and SPS at LLANBYTHER (MANHOLE 7 )EMERGEN	79	841	92.1
Dwr Cymru Welsh Water	River Amman	CSO 28 AT MANHOLE 89 NR AMMAN RFC	90	831	99.8
Dwr Cymru Welsh Water	River Marlas	Settled Storm Overflow at Carmel Wastewater Treatment Works	49	813	43.3
Dwr Cymru Welsh Water	River Gwili	100M D/S R'DBR CWMGWILI (CSO) CARMS	104	797	92.6
Dwr Cymru Welsh Water	River Gwenlais	CILYCWM WWTW	191	786	99.3
Dwr Cymru Welsh Water	Tawelan Brook	Settled Storm Overflow at Brickyard Lane Pumping Station	121	777	99.8
Dwr Cymru Welsh Water	River Loughor	CSO 16 PANTYFFYNON RAILWAY BRIDGE	98	767	99.8
Dwr Cymru Welsh Water	River Cynin	TRELECH STW TRELECH CARMARTHEN ,	91	761	98.9
Dwr Cymru Welsh Water	River Teifi	Emlyn Arms CSO Newcastle Emlyn	231	738	91.3
Dwr Cymru Welsh Water	River Tywi	Llansadwrn SPS	55	729	98.5
Dwr Cymru Welsh Water	River Marlais	29 Aberlash Rd CSO, Llandybie	62	715	98
Dwr Cymru Welsh Water	River Teifi Via An Un-	Llanybydder CSO	79	707	99.3
Dwr Cymru Welsh Water	Groundwater Via Infiltration System	PENDINE SEWAGE TREATMENT WORKS	92	632	99
Dwr Cymru Welsh Water	River Myddyfi	SALEM STW	70	550	98.8
Dwr Cymru Welsh Water	River Gwili	Storm Overflow at Llanpumsaint Wastewater Treatment Works	61	539	95
Dwr Cymru Welsh Water	Nant Corrwg	Brynmeillion SPS Llanpumsaint	79	535	98.8
Dwr Cymru Welsh Water	River Mamog River Cych	CAPEL IWAN STW	36	510	99.5
Dwr Cymru Welsh Water	River Cennen	Primary School CSO Ffairfach	104	501	99.8
Dwr Cymru Welsh Water	River Sawdde	LLANGADOG STW	89	496	99.8
Dwr Cymru Welsh Water	Unnamed Stream	Ty Hen Rhos PS	53	488	98.6
Dwr Cymru Welsh Water	Nant Y Ci	CSO 9 10 METRES DOWNSTREAM - BRIDGE	95	485	96.5
Dwr Cymru Welsh Water	River Myddyfi	SALEM STW Settled Storm	39	482	100
Dwr Cymru Welsh Water	Tywi Estuary	Jewsons CSO Tanerdy Carmarthen	92	457	99.7
Dwr Cymru Welsh Water	Nant Gochen	Cynwyl Village Bridge	39	456	94.3
Dwr Cymru Welsh Water	River Amman	CSO 37, Manhole 24B, Betws Rd Bridge	87	427	98.8
Dwr Cymru Welsh Water	Nant Mynachdy	FELINGWM WASTEWATER TREATMENT WORKS	67	414	99.9
Dwr Cymru Welsh Water	River Tywi	CSO at Cwm Ifor STW Storm Tanks Manordei	23	385	100
Dwr Cymru Welsh Water	River Gwili	Abergwili SPS	78	372	85.7
Dwr Cymru Welsh Water	Towy	Carmarthen Old Llansteffan Rd CSO	136	361	97.5
Dwr Cymru Welsh Water	River Towy	Golden Grove WwTW Inlet CSO Llandie	113	344	98.8
Dwr Cymru Welsh Water	River Loughor	Penybanc Rd 2 CSO	89	327	98
Dwr Cymru Welsh Water	River Bran	Llandovery No1 SPS	107	323	99.8
Dwr Cymru Welsh Water	River Taf	Whitland Terminal Pumping Station CSO and EO	74	318	99.3
Dwr Cymru Welsh Water	Loughor - Conf With Marlais To Conf With Aman	Nant Arw CSO, Capel Hendre	55	287	64.9
Dwr Cymru Welsh Water	Un To River Bran	Myddfai Village Sewerage Scheme CSO	152	286	98.8
Dwr Cymru Welsh Water	River Tywi	CSO Pothouse Wharf PS	76	270	99.3
Dwr Cymru Welsh Water	Nant Pwntan	PWNTAN SPS LLANGAIN CARMARTHENSHIRE	20	269	99.8
Dwr Cymru Welsh Water	Nant Wthan	Saron - A484 O.S. Maesgeler	37	258	98.7
Dwr Cymru Welsh Water	River Teifi	Cwmann SPS	130	248	99.8
Dwr Cymru Welsh Water	Nant Y Wrach	CAERBRYN R'D CSO PENYGROES CARMS	73	243	96.6
Dwr Cymru Welsh Water	River Gwili	Cwmdwyfran SPS	60	239	97.3
Dwr Cymru Welsh Water	River Towy	Morfa Lane CSO, Carmarthen	128	233	98.4
Dwr Cymru Welsh Water	River Towy	SPS at Castle Hill Drainage Area	98	228	98.2
Dwr Cymru Welsh Water	River Brake	Albion SPS	101	227	99.8
Dwr Cymru Welsh Water	River Teifi	WILKES HEAD CSO LLANDYSUL CERED'N	18	216	99
Dwr Cymru Welsh Water	River Amman	CSO 36 Manhole 31c Opp Bettws Pk	101	209	98.5
Dwr Cymru Welsh Water	River Tywi	LLANDEILO CSO	106	209	98.5
Dwr Cymru Welsh Water	Culverted Mackerel Lake Stream	WOGAN MEWS CSO LAUGHARNE CARMS	46	198	49.8
Dwr Cymru Welsh Water	River Amman	CS0 34 100M DOWNSTREAM OF BRIDGE	33	197	99.7
Dwr Cymru Welsh Water	River Mamog	CAPEL IWAN STW	10	192	100
Dwr Cymru Welsh Water	River Tywelli	Pencader SPS	36	183	99.1
Dwr Cymru Welsh Water	River Gwili	CSO 50m D/S From Culvert Meadows R'd	29	164	64.6
Dwr Cymru Welsh Water	River Cywyn	BANCYFELIN STW BANCYFELIN NEAR ST	13	162	99.6
Dwr Cymru Welsh Water	Tywi Estuary	Old Priory Row CSO Parc Hinds PS C	89	157	99.8
Dwr Cymru Welsh Water	Unknown Of River Towy	Carmarthen - Sticle Path	75	142	98.1
Dwr Cymru Welsh Water	River Bran	CYNGHORDY WWTW CYNGHORDY LLANDOVERY	51	140	99.4
Dwr Cymru Welsh Water	Nant Gurrey Fach	Sawmills Y'd CSO Llandeilo Carmarthen	40	137	98.8
Dwr Cymru Welsh Water	River Gronw	15 Meters D/S Whitland Bridge CSO	52	133	98.2
Dwr Cymru Welsh Water	River Amman	CSO 38 500 M UP/STRM CONF LOUGHER	60	121	99
Dwr Cymru Welsh Water	River Amman	CSO 29 At Manhole 76c Nr Hospital	58	121	99.7
Dwr Cymru Welsh Water	River Dulas	CWRT HENRI STW CWRT HENRI CARMS	49	118	99.2
Dwr Cymru Welsh Water	Gwendraeth Fach	Pencader Bridge CSO	39	108	98.9
Dwr Cymru Welsh Water	River Amman	CSO 23 Manhole 125B Nr Brynbach FM	56	97	99
Dwr Cymru Welsh Water	Tawelan Brook	CSO AT JOBSWELL ROAD	68	93	98.8
Dwr Cymru Welsh Water	River Amman	CSO 21 NR FORGE WASHERY BRYNAMMAN	64	82	98.9
Dwr Cymru Welsh Water	River Amman	Station Road CSO, Brynamman	48	80	98
Dwr Cymru Welsh Water	Nant Harri	Rhosmaen PS	47	75	99.1
Dwr Cymru Welsh Water	River Amman	Penpound Lane CSO	29	74	77.9
Dwr Cymru Welsh Water	River Marlais	Llandybie RFC CSO	46	70	99.2
Dwr Cymru Welsh Water	River Towy	Llandeilo Yscubor Abad CSOs	64	69	97.5
Dwr Cymru Welsh Water	Taf Estuary	LAUGHARNE WWTW (STW) LAUGHARNE	53	68	100
Dwr Cymru Welsh Water	River Coran	LAUGHARNE SEWERAGE SYSTEM	59	58	98.5
Dwr Cymru Welsh Water	River Towy	CARMARTHEN - STATION ROAD PUMP	93	55	98.3
Dwr Cymru Welsh Water	Cloidach	CSO at Felingwm Wastewater Treatment Works	19	54	100
Dwr Cymru Welsh Water	River Gronw	CSO at Llanboidy WwTW	19	54	99.3
Dwr Cymru Welsh Water	River Twrch	CSO Felinfach Rd. Ystradowen.	11	52	99.9
Dwr Cymru Welsh Water	River Taf	Llangynog STW	12	32	87.2
Dwr Cymru Welsh Water	River Bran	CYNGHORDY WWTW INLET STORM OVERFLOW	7	31	100
Dwr Cymru Welsh Water	River Lash	Gate Road Sewage Pumping Station Penygroes	15	28	98.7
Dwr Cymru Welsh Water	Nant-Y-Ci	153 Saron Rd CSO	28	23	99.8
Dwr Cymru Welsh Water	River Amman	CSO 31 Manhole 72C Maesgrenig	28	22	99.1
Dwr Cymru Welsh Water	Taf Estuary	LAUGHARNE WASTE WATER TREATMENT WKS	16	22	99.9
Dwr Cymru Welsh Water	River Dulas	CWRT HENRI WWTW INLET STORM OVERFLW	5	22	100
Dwr Cymru Welsh Water	Gwendraeth Fach	Llanddarog	10	21	99.6
Dwr Cymru Welsh Water	River Duar	Llanybydder - Oriel Jones CSO	6	9	52.1
Dwr Cymru Welsh Water	River Tywi	Park Hinds CSO	6	6	99.8
Dwr Cymru Welsh Water	River Duad	Cynwyl Elfed WwTW Cynwyl Elfed Carm Settled Storm	2	6	100
Dwr Cymru Welsh Water	Nant Llynfell	Swo No 11 Nr Glanyrafon Cwmlly CSO	1	6	2
Dwr Cymru Welsh Water	Tawelan Brook	Carmarthen Pentremeurig Road CSO	8	4	99.2
Dwr Cymru Welsh Water	River Duad	CYNWYL ELFED WWTW CYNWYL ELFED CARM	2	3	99.6
Dwr Cymru Welsh Water	River Amman	CSO 19 HALL STREET BRYNAMMAN	6	2	98
Dwr Cymru Welsh Water	River Loughor	Old NCB Yard CSO, Penybanc	2	2	5.7
Dwr Cymru Welsh Water	Unnamed Utory Of River Sawdde	Llangadog Common CSO	5	1	99.7
Dwr Cymru Welsh Water	Tawelan	Carmarthen Near Fire Station CSO	4	1	98.9
Dwr Cymru Welsh Water	River Marlais	LLANSAWEL WWTW	3	1	99.8
Dwr Cymru Welsh Water	River Marlais	Llansawel WWTW Settled Storm	3	1	100
Dwr Cymru Welsh Water	Nant Grenig	CSO 32 30M D/STRM A474 ROADBRIDGE	1	0	75.1
Dwr Cymru Welsh Water	River Melinddwr	LLANSAWEL . .	0	0	1.9
Dwr Cymru Welsh Water	River Gwili	CWMGWILI WWTW CWMGWILI NR AMMANFORD	0	0	99.3
Dwr Cymru Welsh Water	River Bargoed	Llysnewydd SPS	0	0	99.8
Dwr Cymru Welsh Water	River Melinddwr	Llansawel Village CSO No2	0	0	98.9
Dwr Cymru Welsh Water	River Cywyn	Settled Storm Tank at Bancyfelin STW	0	0	99.9
Dwr Cymru Welsh Water	Nant Arw	Capel Hendre Sewage Scheme CSO	0	0	99.8
Dwr Cymru Welsh Water	Tawelon Brook	Pentremeurig Road CSO	0	0	97

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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