Top of the Poops | Constituency Sewage Map

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You're looking at the totals that we have calculated for sewage in Llanelli so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.

Totals for Llanelli in 2026

Sewage14,688 hours

Monitoring offline0 hours

Potential pollution0 hours

Storm overflows94

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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Llannon WwTW Storm Overflow	Afon Morlais	139	2,438h 47m	-
Dwr Cymru Welsh Water	Pontyberem WwTW Storm Overflow	Gwendraeth Fawr	126	1,791h 23m	-
Dwr Cymru Welsh Water	Crosshands WwTW Storm Overflow	River Gwili	110	1,647h 15m	-
Dwr Cymru Welsh Water	Pembrey WwTW Storm Overflow	Unnamed Tributary of The Loughor Estuary	83	1,623h 42m	-
Dwr Cymru Welsh Water	Trimsaran WwTW Storm Overflow	Gwendraeth Fawr	92	854h 5m	-
Dwr Cymru Welsh Water	Llansaint WwTW Storm Overflow	Llansaint Stream	48	801h 44m	-
Dwr Cymru Welsh Water	Cwmtawel WwTW Storm Overflow	River Gwili	64	654h 43m	-
Dwr Cymru Welsh Water	Pontyates Heol Y Meinciau Storm Overflow	Gwendraeth Fawr	59	602h 12m	-
Dwr Cymru Welsh Water	Mynydd Cerrig Storm Overflow	River Dulais	49	552h	-
Dwr Cymru Welsh Water	Carway WwTW Storm Overflow	Tributary of Gwendraeth Fawr	91	497h 19m	-
Dwr Cymru Welsh Water	Llanedi WwTW Storm Overflow	River Gwili	81	493h 7m	-
Dwr Cymru Welsh Water	Croes Y Ceiliog Overflow	Nant Cwm-Croesyceiliog	34	290h 3m	-
Dwr Cymru Welsh Water	Parc y Dai No1 Drefach Storm Overflow	Gwendraeth Fawr	58	276h 13m	-
Dwr Cymru Welsh Water	Penybanc Storm Overflow	River Loughor	44	244h 49m	-
Dwr Cymru Welsh Water	Trimsaran WwTW Inlet Storm Overflow	Gwendraeth Fawr	61	210h 53m	-
Dwr Cymru Welsh Water	Pantyffynnon Mill Terrace Storm Overflow	River Loughor	23	134h 34m	-
Dwr Cymru Welsh Water	Pembrey Danlan Park Storm Overflow	Unnamed Drain leading to Afon Llwchwr	27	133h 32m	-
Dwr Cymru Welsh Water	Clos Isaf Storm Overflow	Gwendraeth Fawr	41	122h 54m	-
Dwr Cymru Welsh Water	Tycoch Storm Overflow	Tributary of Gwendraeth Fawr	32	114h 1m	-
Dwr Cymru Welsh Water	Llanelli Coastal WwTW Storm Overflow	Loughor Estuary	18	106h 29m	-
Dwr Cymru Welsh Water	Heol Plas Isaf Storm Overflow	Nant Mwrwg	34	100h 59m	-
Dwr Cymru Welsh Water	Pontyberem Storm Overflow	Gwendraeth Fawr	26	82h 46m	-
Dwr Cymru Welsh Water	Carmarthen Road Cefneithin Storm Overflow	Gwendraeth Fawr	25	82h 18m	-
Dwr Cymru Welsh Water	Pembrey Links Storm Overflow	Swan Pool Drain	8	80h 15m	-
Dwr Cymru Welsh Water	Next to Heol Y Meinciau Bridge Pontyates Storm Overflow	Gwendraeth Fawr	19	64h 13m	-
Dwr Cymru Welsh Water	Ferryside Storm Overflow	Ferryside Stream	17	63h 46m	-
Dwr Cymru Welsh Water	Heol Y Bryn Storm Overflow	Gwendraeth Fawr	13	59h 58m	-
Dwr Cymru Welsh Water	Cefneithin Road Gorslas Storm Overflow	Gwendraeth Fawr	19	55h 27m	-
Dwr Cymru Welsh Water	Llanelli St Michaels Storm Overflow	River Dafen	8	53h 30m	-
Dwr Cymru Welsh Water	Kingfisher Court East Storm Overflow	River Dafen	5	49h 15m	-
Dwr Cymru Welsh Water	Maerdy Bridge Storm Overflow	Gwendraeth Fawr	21	34h 46m	-
Dwr Cymru Welsh Water	Kidwelly Garreg Storm Overflow	Gwendraeth Fach	7	27h 44m	-
Dwr Cymru Welsh Water	Llanelli Sandy Road Storm Overflow	River Dulais	18	27h 13m	-
Dwr Cymru Welsh Water	Cwm Mawr Heol Cwmbach Storm Overflow	Gwendraeth Fawr	9	26h 31m	-
Dwr Cymru Welsh Water	Parc y Dai No 2 Drefach Storm Overflow	Gwendraeth Fawr	16	26h 19m	-
Dwr Cymru Welsh Water	Llangennech Storm Overflow	River Loughor	21	26h 11m	-
Dwr Cymru Welsh Water	Iscoed Road Storm Overflow	River Loughor	19	25h 42m	-
Dwr Cymru Welsh Water	Burry Port Ashburnham Road Storm Overflow	Disused Canal	2	24h 48m	-
Dwr Cymru Welsh Water	Dafen Industrial Estate Storm Overflow	River Dafen	2	18h 30m	-
Dwr Cymru Welsh Water	Llanelli Northumberland Tanks Storm Overflow	Loughor Estuary	11	17h 44m	-
Dwr Cymru Welsh Water	Ponthenri Storm Overflow	Gwendraeth Fawr	6	16h 14m	-
Dwr Cymru Welsh Water	Cefneithin Road Ddol Las Storm Overflow	Gwendraeth Fawr	4	15h 15m	-
Dwr Cymru Welsh Water	Pwll Storm Overflow	River Dulais	2	15h	-
Dwr Cymru Welsh Water	Llanelli Tir Einon Storm Overflow	River Dafen	7	14h 58m	-
Dwr Cymru Welsh Water	Hendy Arlan Gwili Storm Overflow	River Gwili	9	12h 53m	-
Dwr Cymru Welsh Water	Llanelli Bynea Storm Overflow	Tidal Pill of Loughor Estuary	4	11h 31m	-
Dwr Cymru Welsh Water	Heol Ddu Storm Overflow	Nant Dyfaty	4	8h 12m	-
Dwr Cymru Welsh Water	Pontyberem WwTW Inlet Storm Overflow	Gwendraeth Fawr	5	7h 13m	-
Dwr Cymru Welsh Water	Station Road Kidwelly Overflow	Gwendraeth Fach	13	7h 6m	-
Dwr Cymru Welsh Water	Station Road Kidwelly Storm Overflow	Gwendraeth Fach	13	7h 6m	-
Dwr Cymru Welsh Water	Burry Port Storm Overflow	Unnamed Tributary of Barnaby Pill	7	6h 31m	-
Dwr Cymru Welsh Water	Waungoch Storm Overflow	Unnamed Tributary of the Nant Glas	1	4h 45m	-
Dwr Cymru Welsh Water	Llanelli Station Road Junction Storm Overflow	River Lliedi	5	4h 8m	-
Dwr Cymru Welsh Water	Rhosnewydd Tumble Storm Overflow	Tributary of Gwendraeth Fawr	7	3h 22m	-
Dwr Cymru Welsh Water	Lower Trostre Road Llanelli Overflow	River Dafen	3	3h 14m	-
Dwr Cymru Welsh Water	Llanelli Cambrian Storm Overflow	Loughor Outer	6	2h 44m	-
Dwr Cymru Welsh Water	Bryngwili Road Green Storm Overflow	River Gwili	1	1h 44m	-
Dwr Cymru Welsh Water	Old Castle Road Storm Overflow	River Lliedi	2	1h 43m	-
Dwr Cymru Welsh Water	Llanelli Pwll Park Storm Overflow	Unnamed Tributary of Barnaby Pil	3	1h 43m	-
Dwr Cymru Welsh Water	Llanelli Penyfan Playing Field Storm Overflow	River Lliedi	4	1h 17m	-
Dwr Cymru Welsh Water	Y Gaer Llanelli Overflow	Dafen	5	1h 15m	-
Dwr Cymru Welsh Water	Llangyndeyrn WwTW Storm Overflow	Gwendraeth Fach	1	0h 29m	-
Dwr Cymru Welsh Water	Ashburnham Storm Overflow	Burry Port Harbour	1	0h 29m	-
Dwr Cymru Welsh Water	Church Road Burry Port Storm Overflow	Nant Dyfatty	1	0h 29m	-
Dwr Cymru Welsh Water	Llanelli Havard Road Storm Overflow	River Dafen	1	0h 24m	-
Dwr Cymru Welsh Water	Pontardulais Road Llangennech Storm Overflow	Afon Morlais	1	0h 15m	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Llwynuhilwg PS Overflow	Tributary of the River Dafen	0	0h	-
Dwr Cymru Welsh Water	Heol Hen Storm Overflow	Unnamed Tributary of the River Loughor	0	0h	-
Dwr Cymru Welsh Water	Trostre Industrial Park Storm Overflow	River Dafen	0	0h	-
Dwr Cymru Welsh Water	Trimsaran Heol Llanelli Storm Overflow	Afon Morlais	0	0h	-
Dwr Cymru Welsh Water	Burry Port Shoreline Overflow	Unnamed Stream Flowing to Outer Harbour	0	0h	-
Dwr Cymru Welsh Water	Bryn Avenue Burry Port Storm Overflow	Tributary of Barnaby Pill	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Llanelli Y Llwyn Storm Overflow	River Dafen	0	0h	-
Dwr Cymru Welsh Water	Maestir Llanelli Storm Overflow	River Lliedi	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Basset Terrace Storm Overflow	River Dulais	0	0h	-
Dwr Cymru Welsh Water	Hendy Storm Overflow	River Gwili	0	0h	-
Dwr Cymru Welsh Water	Llanelli Halfway Storm Overflow	River Dafen	0	0h	-
Dwr Cymru Welsh Water	Ferryside Near Railway Track WwTW Storm Overflow	Ferryside Stream	0	0h	-
Dwr Cymru Welsh Water	Heol Goffa Bridge Storm Overflow	River Lliedi	0	0h	-
Dwr Cymru Welsh Water	Andrew Street Bridge Storm Overflow	River Lliedi	0	0h	-
Dwr Cymru Welsh Water	Llangyndeyrn Storm Overflow	Unnamed Tributary of Gwendraeth Fach	0	0h	-
Dwr Cymru Welsh Water	Dyfatty Park Overflow	Drain leading to the River Loughor	0	0h	-
Dwr Cymru Welsh Water	Llanelli Swanfield Place Storm Overflow	River Lliedi	0	0h	-
Dwr Cymru Welsh Water	Heol Nazareth Pontyates Storm Overflow	Gwendraeth Fawr	0	0h	-
Dwr Cymru Welsh Water	Llangennech Recreation Ground Storm Overflow	River Loughor	0	0h	-
Dwr Cymru Welsh Water	Upper Cross Road Llanelli Storm Overflow	River Dafen	0	0h	-
Dwr Cymru Welsh Water	Cwm Capel Overflow	Nant Dyfatty	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Thomas Street Storm Overflowi	River Lliedi	0	0h	-
Dwr Cymru Welsh Water	Y Llwyn Llanelli Storm Overflow	River Dafen	0	0h	-

Llanelli - Live Sewage

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