Top of the Poops | Constituency Sewage Map - 2025 Data| Aberafan Maesteg

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You're looking at the totals that we have calculated for sewage in Aberafan Maesteg for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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.

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Constituencies near Aberafan Maesteg

Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Lletty Brongu WwTW Storm Overflow	River Llynfi	115	1,850 h 12m	-
Dwr Cymru Welsh Water	Talbot Street Maesteg Storm Overflow	River Llynfi	111	1,122 h 31m	-
Dwr Cymru Welsh Water	Afan WwTW Storm Overflow	Swansea Bay	94	1,110 h 59m	-
Dwr Cymru Welsh Water	Abercregan Storm Overflow	River Afan	60	1,057 h 30m	-
Dwr Cymru Welsh Water	Marlas Storm Overflow	River Kenfig	69	1,024 h 44m	-
Dwr Cymru Welsh Water	Heol Tywith Maesteg Storm Overflow	River Llynfi	79	751 h 55m	-
Dwr Cymru Welsh Water	London Close Cwmafan Overflow	River Afan	87	727 h 22m	-
Dwr Cymru Welsh Water	Off Glan-yr-afon road Cwmfelin Maesteg Storm Overflow	River Llynfi	95	721 h 15m	-
Dwr Cymru Welsh Water	Gwaun Afan Storm Overflow	River Afan	80	590 h 8m	-
Dwr Cymru Welsh Water	Maesteg Row Maesteg Storm Overflow	River Llynfi	115	559 h 49m	-
Dwr Cymru Welsh Water	Caerau Road Storm Overflow	River Llynfi	49	557 h 16m	-
Dwr Cymru Welsh Water	Telecommunication Mast Cwmafan Storm Overflow	River Afan	58	547 h 19m	-
Dwr Cymru Welsh Water	Garth Heol Faen Storm Overflow	Nant Y Twlc	95	526 h 52m	-
Dwr Cymru Welsh Water	Cymmer Storm Overflow	River Afan	95	501 h 15m	-
Dwr Cymru Welsh Water	Parc-Tyn-Y-Waun Llangynwyd Storm Overflow	River Llynfi	73	456 h 55m	-
Dwr Cymru Welsh Water	Ton-Mawr Road Storm Overflow	Afon Pelenna	59	447 h 45m	-
Dwr Cymru Welsh Water	Cwmavon Road Cwmafan Storm Overflow	Nant Cwm - Clais	75	426 h 24m	-
Dwr Cymru Welsh Water	Newbridge Road No 2 Port Talbot Storm Overflow	River Afan	42	418 h	-
Dwr Cymru Welsh Water	Ynys Street Storm Overflow	River Afan	39	318 h 9m	-
Dwr Cymru Welsh Water	Bryngyrnos Storm Overflow	Ffrwd Wyllt	73	313 h 46m	-
Dwr Cymru Welsh Water	Hermon Road Storm Overflow	River Llynfi	66	299 h 10m	-
Dwr Cymru Welsh Water	Glyncorrwg Storm Overflow	Afon Corrwg	61	272 h 30m	-
Dwr Cymru Welsh Water	Bangor Street Nantyffyllon Storm Overflow	River Llynfi	30	271 h 30m	-
Dwr Cymru Welsh Water	Caerau Square Storm Overflow	River Llynfi	69	244 h 21m	-
Dwr Cymru Welsh Water	Duke Street Margam Storm Overflow	Arnallt Brook	31	199 h 9m	-
Dwr Cymru Welsh Water	Conduit Street Port Talbot Storm Overflow	Ffrwd Wyllt	28	185 h 45m	-
Dwr Cymru Welsh Water	Bridgend Road Maesteg Overflow	River Llynfi	23	165 h 8m	-
Dwr Cymru Welsh Water	London Terrace Cwmafan Storm Overflow	River Afan	34	144 h 16m	-
Dwr Cymru Welsh Water	Maesteg Bridgend Road Storm Overflow	River Llynfi	29	137 h 30m	-
Dwr Cymru Welsh Water	Ynys Y Gored Storm Overflow	River Afan	40	125 h 32m	-
Dwr Cymru Welsh Water	Pont-rhyd-y-fen Maes-y-bettws Storm Overflow	Afon Pelenna	40	108 h 43m	-
Dwr Cymru Welsh Water	Afan Way Storm Overflow	River Afan	34	93 h 36m	-
Dwr Cymru Welsh Water	Alder Terrace Storm Overflow	River Afan	27	83 h 59m	-
Dwr Cymru Welsh Water	Duffryn Afan Road Storm Overflow	River Afan	19	74 h 2m	-
Dwr Cymru Welsh Water	Cyonville Overflow	River Afan	30	56 h 24m	-
Dwr Cymru Welsh Water	Bron-y-Waun Maesteg Storm Overflow	Nant Y Twlc	30	46 h 6m	-
Dwr Cymru Welsh Water	Castle Street Maesteg Storm Overflow	River Llynfi	10	45 h 26m	-
Dwr Cymru Welsh Water	Steel Works Port Talbot Storm Overflow	Swansea Bay	9	39 h 15m	-
Dwr Cymru Welsh Water	Church Street Maesteg Storm Overflow	River Llynfi	18	28 h 51m	-
Dwr Cymru Welsh Water	Pant Bach Storm Overflow	River Kenfig	4	27 h 54m	-
Dwr Cymru Welsh Water	Giant's Grave Storm Overflow	Neath Estuary	9	19 h 30m	-
Dwr Cymru Welsh Water	Afan Street Port Talbot Storm Overflow	River Afan	16	17 h 37m	-
Dwr Cymru Welsh Water	Upper Cymmer Margam Street Storm Overflow	River Afan	20	17 h 22m	-
Dwr Cymru Welsh Water	Pwll y Glaw Cwmafan Overflow	River Afan	8	10 h 6m	-
Dwr Cymru Welsh Water	Blaengwynfi Tunnel Storm Overflow	River Afan	11	9 h 12m	-
Dwr Cymru Welsh Water	Maesteg Paddock Wood Storm Overflow	River Llynfi	17	8 h 54m	-
Dwr Cymru Welsh Water	Pontrhydyfen Viaduct Storm Overflow	River Afan	11	8 h 27m	-
Dwr Cymru Welsh Water	Heol-y-Llwyni Rear Storm Overflow	Tributary of Afon Llynfi	8	6 h 23m	-
Dwr Cymru Welsh Water	Maesteg Market Storm Overflow	River Llynfi	8	3 h 41m	-
Dwr Cymru Welsh Water	Briton Ferry Storm Overflow	River Neath	2	1 h 45m	-
Dwr Cymru Welsh Water	Morgans Terrace Playground Pontrhydyfen Storm Overflow	Afon Pelenna	2	0 h 44m	-
Dwr Cymru Welsh Water	Stallcourt Close Rear Storm Overflow	Arnallt Brook Culvert (to Swansea Bay)	0	0 h	-
Dwr Cymru Welsh Water	Lon-Y-Cariadon Storm Overflow	Afon Fach	0	0 h	-
Dwr Cymru Welsh Water	Ty Draw Lane Overflow	Sea Water	0	0 h	-
Dwr Cymru Welsh Water	Heol Las Play Area Storm Overflow	Sea Water	0	0 h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0 h	-
Dwr Cymru Welsh Water	Margam PS Prince Street Overflow	Culverted Section of Arnallt Brook	0	0 h	-
Dwr Cymru Welsh Water	George's Row Neath Storm Overflow	Neath Estuary	0	0 h	-

Company

Site Name

Receiving Waterway

Overflow Days

Total Duration (hours)

Offline/Potential Pollution

Dwr Cymru Welsh Water

Lletty Brongu WwTW Storm Overflow

River Llynfi

115

1,850 h 12m

Dwr Cymru Welsh Water