Llanelli was polluted by sewage 3,726 times in 2024
lasting 31,232 hours - that's 3.61 years!
- but monitoring was disabled in some locations, so could be more

Constituency

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✔ means we have experimental daily data since 2023

Totals for Llanelli in 2024

68 Sites polluted by Dwr Cymru Welsh Water

3,726 sewage dumps
31,232 h duration

That's 3.61 years! On average 10.2 times a day

Change Over Time

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Constituencies near Llanelli

Waterways in Llanelli

Pollution Summary 2024

Here are all the reported sewage overflow totals for Llanelli 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 1 of the total 80 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Dwr Cymru Welsh Water	River Gwendraeth Fach	LLANDDAROG WWTW LLANDDAROG CARMARTH	172	3,356	99.9
Dwr Cymru Welsh Water	River Marlias	LLANNON STW LLANNON LLANELLI	227	3,186	99.8
Dwr Cymru Welsh Water	Unknown Loughor Estuary	PEMBREY WWTW CSO	118	2,250	99.9
Dwr Cymru Welsh Water	Gwendraeth Fawr	Trimsaran Waste Water Treatement Works Settled Storm	150	2,236	99.9
Dwr Cymru Welsh Water	River Dulias	MYNNYDD CERRIG PUMPING STATION	145	2,094	99.1
Dwr Cymru Welsh Water	River Gwili	LLANEDI WWTW	204	1,964	100
Dwr Cymru Welsh Water	Llansaint Stream	LLANSAINT WWTW LLANSAINT FERRYSIDE	97	1,495	98.25
Dwr Cymru Welsh Water	Gwendraeth Fawr	PONTYBEREM WWTW PONTYBEREM CARMS	82	1,463	66.1
Dwr Cymru Welsh Water	River Gwili	Cwmtawel Wastewater Treatment Works Inlet Storm Overflow (CSO)	112	1,382	99.5
Dwr Cymru Welsh Water	Gwendraeth Fach	GARREG SPS LLANGADOG KIDWELLY	69	1,084	99.6
Dwr Cymru Welsh Water	Gwendraeth Fawr	CARWAY WWTW CARWAY CARMS	157	986	100
Dwr Cymru Welsh Water	Ferryside Stream	FERRYSIDE STW FERRYSIDE CARMS	64	898	99.2
Dwr Cymru Welsh Water	River Gwili	CROSSHANDS WWTW	130	823	99.8
Dwr Cymru Welsh Water	Nant Y Gro	CSO at Trimsaran WWTW Spudder Bridge Road	219	789	99.7
Dwr Cymru Welsh Water	Gwendraeth Fawr	Settled Storm Overflow at Pontyberem Wastewater Treatment Works	45	730	33.5
Dwr Cymru Welsh Water	River Loughor	PEN Y BANC CSO 40 ON HENDRE SEWER	89	368	98.4
Dwr Cymru Welsh Water	Loughor Estuary	LLANELLI WWTW BERWICK ROAD BYNEA	59	355	99.6
Dwr Cymru Welsh Water	Of Gwendraeth Fach	TYCOCH SEWAGE PUMPING STATION KIDW	71	337	99.8
Dwr Cymru Welsh Water	Barnaby Pil	CSO Behind 8 Pwll Road, Pwll	28	324	98.5
Dwr Cymru Welsh Water	Nant Mwrwg	CSO at Rear of Trio Engineer'g Llangennech	75	312	99.3
Dwr Cymru Welsh Water	Gwendraeth Fawr	Clos Isaf CSO, Drefach	78	298	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	SOC4 PONTYATES AREA CSO	52	279	98.7
Dwr Cymru Welsh Water	Gwendraeth Fawr	Parc Y Dai No1 CSO Drefach	91	268	97.7
Dwr Cymru Welsh Water	River Dafen	East of Kingfisher Court CSO	28	264	99.4
Dwr Cymru Welsh Water	Loughor Est'Y	PEMBREY WASTEWATER TREATMENT WORKS	31	255	99.5
Dwr Cymru Welsh Water	River Dafen	St Michael’s Church CSO	27	251	99
Dwr Cymru Welsh Water	River Gwili	Storm Overflow at Llanedi Wastewater Treatment Works	71	242	99.9
Dwr Cymru Welsh Water	River Loughor	Combined Sewer Overflow 15	65	241	77.1
Dwr Cymru Welsh Water	River Gwili	CWMTAWEL WWTW OFF A48 S CROSS HANDS	13	232	100
Dwr Cymru Welsh Water	River Loughor	Ynys Tomenlle CSO Iscoed R'd Hendy	44	225	99.6
Dwr Cymru Welsh Water	Unnamed Canal To Tywi Estuary	SWO. BURRY PORT AREA - INTO O	61	207	98.3
Dwr Cymru Welsh Water	Gwendraeth Fawr	New Lodge Inn CSO Pontyberem Carm	48	203	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	Pontyberem No2 SPS	58	183	99.5
Dwr Cymru Welsh Water	Gwendraeth Fawr	CSO at Cwm Mawr Rb No1 Gwendreath Catchmen	39	164	99.6
Dwr Cymru Welsh Water	Gwendraeth Fawr	Tom Jones Nursery CSO	54	155	99.8
Dwr Cymru Welsh Water	Ferryside Stream	FERRYSIDE PS . .	36	154	99.2
Dwr Cymru Welsh Water	Gwendraeth Fawr	CSO at Access Road To Pontyberem STW	47	145	99.7
Dwr Cymru Welsh Water	Nant Mwrwg Tidal	SSO LLANGENNECH PS CARMS	77	132	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	HEOL MEINCIAU CSO	24	92	99.5
Dwr Cymru Welsh Water	River Dulais	SANDY SPS (A484 o/s gate to Sandy PS)	24	84	99.5
Dwr Cymru Welsh Water	River Loughor Estuary	PWLL SEWAGE PUMPING STATION CARMS	7	83	100
Dwr Cymru Welsh Water	River Morlais	CSO at 250 M DOWN STREAM OF GLAN-YR-AFON	35	76	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	Parc y Dai CSO	43	71	85.5
Dwr Cymru Welsh Water	River Loughor Estuary	SSO. NORTHUMBERLAND OUTFALL	25	64	100
Dwr Cymru Welsh Water	Tidal Pill Of Loughor Estuary	Bynea Sewage pumping Station	11	49	99.7
Dwr Cymru Welsh Water	Pîl Dafen	CSO 49 Tir Einon, Llwynhendy	24	44	92.1
Dwr Cymru Welsh Water	Gwendraeth Fawr	PONT HENRI INCLINE INN CSO	13	43	99.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	27 RHOSNEWYDD MAESYGWERN CSO TUMBLE	37	36	96
Dwr Cymru Welsh Water	Gwendraeth Fach Estuary	SSO AT STATION ROAD P.S. KIDWELLY	39	34	99.8
Dwr Cymru Welsh Water	River Gwili	CSO At Hendy On Left Bank Of River	51	30	98.8
Dwr Cymru Welsh Water	Nant Dyfaty	Heol Ddu SPS	9	28	97.3
Dwr Cymru Welsh Water	River Gwili	Bryngwili Rd CSO, Hendy	16	27	96.7
Dwr Cymru Welsh Water	Unnamed Utuary Of Gwendreath Fach	CSO at Llangynderyn PS into R Gwendraeth Fach	20	26	99.5
Dwr Cymru Welsh Water	River Lliedi	Llanelli - Head Post Office CSO	29	23	99.3
Dwr Cymru Welsh Water	Gwendraeth Fawr	Ddoll Las Temporary CSO Llanelli	11	18	99.5
Dwr Cymru Welsh Water	Loughor Outer	Cambrian Street P.S. SSO	10	9	99.8
Dwr Cymru Welsh Water	Burry Port Harbour Via Drain	Ahshburnham SPS CSO	3	9	98.3
Dwr Cymru Welsh Water	An Barnaby Pil	Burry Port Sewage Pumping Station	6	7	99.8
Dwr Cymru Welsh Water	Disused Canal	Ashburnham Road CSO	7	6	98.5
Dwr Cymru Welsh Water	River Dafen	Havard Road CSO	16	6	99.1
Dwr Cymru Welsh Water	River Lliedi	SWO.BELOW PENYFAN QUARRY(S158) LLAN	13	3	99
Dwr Cymru Welsh Water	Gwendraeth Fach	Settled Storm Overflow at Llangyndeyrn Wastewater Treatment Works	5	3	99.6
Dwr Cymru Welsh Water	River Dulais	YARD BRIDGE CSO SANDY RD PWLL LLAN	4	2	81.7
Dwr Cymru Welsh Water	River Lliedi	HEOL GOFFA ROAD CSO LLANELLI CARMS	4	1	99.4
Dwr Cymru Welsh Water	Nant Dyfatty	CHURCH ROAD CSO BURRY PORT LLANELLI	3	1	85.5
Dwr Cymru Welsh Water	Nant Glas	Waungoch SPS CSO	2	1	98.9
Dwr Cymru Welsh Water	Barnaby Pil	Bryn Avenue CSO	1	1	98.6
Dwr Cymru Welsh Water	River Dafen Via Surface Water Culvert	Pencae Terrace CSO	1	0	91.2
Dwr Cymru Welsh Water	Tidal Nant Mwrwg	LLANGENNECH P.STN.SSO LLANELLI	0	0	99.8
Dwr Cymru Welsh Water	River Lliedi	Llanelli - O/S Thomas Brothers CSO	0	0	99.7
Dwr Cymru Welsh Water	River Morlais	HEOL WAUN Y CLUN CSO TRIMSARAN	0	0	98.7
Dwr Cymru Welsh Water	River Gwili	Hendy SPS	0	0	98.9
Dwr Cymru Welsh Water	Surf W System To River Dafen	ST GEORGE COTTAGES CSO COEDCAE	0	0	78.5
Dwr Cymru Welsh Water	River Lliedi	CSO BELOW ANDREW STREET BRIDGE LLAN	0	0	56.4
Dwr Cymru Welsh Water	Gwendraeth Fawr	BLAENHIRWAUN CSO CEFNEITHIN	0	0	0
Dwr Cymru Welsh Water	River Lliedi	CSO at 52 Maestir, Llanelli	0	0	46.8
Dwr Cymru Welsh Water	Gwendraeth Fawr	HEOL NAZARETH 2 CSO	0	0	99.7
Dwr Cymru Welsh Water	Un	HEOL HEN CSO LLWYNHENDY LLANELLI	0	0	47.7
Dwr Cymru Welsh Water	River Dafen	Halfway Area CSO, Y Llwyn, Coedcae	0	0	99.2
Dwr Cymru Welsh Water	River Lliedi	BUCKLEYS CELLAR CSO LLANELLI	0	0	96.3

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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