Top of the Poops | Constituency Sewage Map

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Gower 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 Gower in 2026

Sewage8,806 hours

Monitoring offline0 hours

Potential pollution0 hours

Storm overflows73

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Company	Site Name	Receiving Waterway	Overflow Days	Total Duration (hours)	Offline/Potential Pollution
Dwr Cymru Welsh Water	Llannant WwTW Storm Overflow	Tributary of Afon Llwchwr	98	1,901h 16m	-
Dwr Cymru Welsh Water	Mumbles Knab Rock Storm Overflow	Estuarial Waters of Swansea Bay	94	1,427h 46m	-
Dwr Cymru Welsh Water	Waun Road Loughor Overflow	Llwchwr	60	840h 49m	-
Dwr Cymru Welsh Water	Newton Road Swansea Overflow	Swansea Bay	62	777h 31m	-
Dwr Cymru Welsh Water	Pont y Cob Road Storm Overflow	Afon Lliw	65	429h 35m	-
Dwr Cymru Welsh Water	Blodwen Terrace Storm Overflow	Loughor Estuary	41	418h 54m	-
Dwr Cymru Welsh Water	Pontilw Storm Overflow	Afon Lliw	63	369h 16m	-
Dwr Cymru Welsh Water	Garnswllt WwTW Storm Overflow	River Loughor	23	336h 30m	-
Dwr Cymru Welsh Water	Scurlage Overflow	Tributary of Burry Pill	16	230h 30m	-
Dwr Cymru Welsh Water	Bwrw Road Loughor Overflow	Llwchwr	46	203h 1m	-
Dwr Cymru Welsh Water	Penclawdd Into Loughor Estuary Storm Overflow	Burry Estuary	14	175h 41m	-
Dwr Cymru Welsh Water	Waun Road Loughor No.2 Storm Overflow	Afon Lliw	69	175h 35m	-
Dwr Cymru Welsh Water	Frogmore Storm overflow	Oxwich Marsh Stream	29	156h	-
Dwr Cymru Welsh Water	Cwmbach Road Storm Overflow	Afon Llan	37	139h 9m	-
Dwr Cymru Welsh Water	Rhosog Storm Overflow	Afon Lliw	25	110h 28m	-
Dwr Cymru Welsh Water	Brithwen Road Junction with Swansea Road Storm Overflow	Gors-Fawr Brook	6	88h 34m	-
Dwr Cymru Welsh Water	Norton Road and Avenue Junction Swansea Storm Overflow	Swansea Bay	33	81h 42m	-
Dwr Cymru Welsh Water	Gowerton WwTW Storm Overflow	Loughor Estuary	16	81h 30m	-
Dwr Cymru Welsh Water	Parkmill Overflow	Mill Leat	12	78h 44m	-
Dwr Cymru Welsh Water	Newton Road Overflow	Caswell Bay	37	75h 57m	-
Dwr Cymru Welsh Water	Bwlch Road Glanymor Road Storm Overflow	River Loughor	22	74h 46m	-
Dwr Cymru Welsh Water	Pontardulais Storm Overflow	Loughor	12	72h 15m	-
Dwr Cymru Welsh Water	Bishopston WwTW Storm Overflow	Coastal Waters - Brandy Cove	8	67h 59m	-
Dwr Cymru Welsh Water	Gorseinon Grovesend Storm Overflow	Llwchwr Estuary	25	65h 44m	-
Dwr Cymru Welsh Water	Chapel Road Crofty Storm Overflow	Morlais River	12	62h 54m	-
Dwr Cymru Welsh Water	Loughor Kings Bridge Storm Overflow	Afon Lliw	23	53h 1m	-
Dwr Cymru Welsh Water	Cuckoo Mill Storm Overflow	Afon Llan	5	44h 59m	-
Dwr Cymru Welsh Water	Llanrhidian PS Overflow	Estuary	15	35h 58m	-
Dwr Cymru Welsh Water	Crofty B North of Trading Estate Storm Overflow	Burry Estuary	6	31h 1m	-
Dwr Cymru Welsh Water	Denver Road Storm Overflow	Afon Llan	29	28h 47m	-
Dwr Cymru Welsh Water	Pennard Overflow	Ilston Stream	8	22h 43m	-
Dwr Cymru Welsh Water	Gower Road Upper Killay Storm Overflow	River Clun	4	19h 30m	-
Dwr Cymru Welsh Water	Llangennith Hillend Storm Overflow	Unnamed Stream	9	17h 29m	-
Dwr Cymru Welsh Water	Rhossili WwTW Overflow	Carmarthen Bay	5	15h 15m	-
Dwr Cymru Welsh Water	Gowerton Brynymor Road Storm Overflow	Tributary of Afon Llan	9	14h 39m	-
Dwr Cymru Welsh Water	Hen Parc Lane Overflow	Unnamed Tributary of the Clyne River	7	12h 17m	-
Dwr Cymru Welsh Water	Libanus Road Gorseinon Overflow	Afon Lliw	9	11h 40m	-
Dwr Cymru Welsh Water	Loughor Pentrebach Storm Overflow	Tributary of Afon Llwchwr	6	10h 14m	-
Dwr Cymru Welsh Water	Cwm Ivy Overflow	Burry Pill	5	9h	-
Dwr Cymru Welsh Water	Promenade Terrace Swansea Storm Overflow	Swansea Bay	2	8h 30m	-
Dwr Cymru Welsh Water	Junction of The Dunns and Mumbles Road The Mumbles Storm Overflow	Swansea Bay	8	7h 27m	-
Dwr Cymru Welsh Water	Cranmer Court Storm Overflow	Unnamed Tributary of Afon Llan	2	5h 45m	-
Dwr Cymru Welsh Water	Pen Y Cwm Cockett Storm Overflow	Unnamed Tributary of Afon Llan	2	4h 27m	-
Dwr Cymru Welsh Water	Loughor Brynafon Road Storm Overflow	Tributary of Loughor Estuary	1	3h 41m	-
Dwr Cymru Welsh Water	Norton Road Storm Overflow	Swansea Bay	4	1h 30m	-
Dwr Cymru Welsh Water	Limeslade Overflow	Limeslade Bay	5	1h 15m	-
Dwr Cymru Welsh Water	Gorseinon Road West of Roundabout Storm Overflow	Unnamed Tributary of Afon Lliw	2	1h 11m	-
Dwr Cymru Welsh Water	New Well Lane Overflow	Swansea Bay	3	0h 59m	-
Dwr Cymru Welsh Water	Elmgrove Road Swansea Storm Overflow	Washinghouse Brook	2	0h 53m	-
Dwr Cymru Welsh Water	Pontadulais Storm Overflow	River Loughor	2	0h 45m	-
Dwr Cymru Welsh Water	Gorseinon Road Penllergaer Storm Overflow	Afon Lliw	1	0h 44m	-
Dwr Cymru Welsh Water	Benson Road Storm Overflow	Culvert leading to Burry Estuary	2	0h 30m	-
Dwr Cymru Welsh Water	Mayals Road Storm Overflow	Swansea Bay	1	0h 14m	-
Dwr Cymru Welsh Water	Camarthen Road Llewitha Storm Overflow	Afon Llan	0	0h	-
Dwr Cymru Welsh Water	Tidal Reach Pontarddulais Storm Overflow	River Dulais	0	0h	-
Dwr Cymru Welsh Water	Abergelly Road Kingsway Storm Overflow	Tributary of Afon Llan	0	0h	-
Dwr Cymru Welsh Water	Bishopston Overflow	River Teifi	0	0h	-
Dwr Cymru Welsh Water	Bryn Y Mor Road Gowerton Overflow	Unnamed Watercourse	0	0h	-
Dwr Cymru Welsh Water	CEFN Stylle Storm Overflow	Tributary of Loughor Estuary	0	0h	-
Dwr Cymru Welsh Water	Liliput Lane Swansea Storm Overflow	Swansea Bay	0	0h	-
Dwr Cymru Welsh Water	Bryn Y Mor Road Storm Overflow	Pennard Pill	0	0h	-
Dwr Cymru Welsh Water	Heol Pentre Bach Storm Overflow	Tributary of Loughor Estuary	0	0h	-
Dwr Cymru Welsh Water	Amy Dillwyn Close Storm Overflow	Swansea Bay	0	0h	-
Dwr Cymru Welsh Water	Swansea Road Pontlliw Storm Overflow	River Lliw	0	0h	-
Dwr Cymru Welsh Water	Borough Rd Storm overflow	Tributary of Loughor Estuary	0	0h	-
Dwr Cymru Welsh Water	Overton WwTW Storm Overflow	Coastal Waters - Overton Mere	0	0h	-
Dwr Cymru Welsh Water	Langland Bay Swansea Overflow	Langland Bay	0	0h	-
Dwr Cymru Welsh Water	Reynoldston WwTW Storm Overflow	Burry Pill	0	0h	-
Dwr Cymru Welsh Water	Cheriton Overflow	Burry Pill	0	0h	-
Dwr Cymru Welsh Water	Unknown	Unknown	0	0h	-
Dwr Cymru Welsh Water	Swansea Fairwood Road Storm Overflow	Washinghouse Brook	0	0h	-
Dwr Cymru Welsh Water	The Nook Oxwich Storm Overflow	Oxwich Marsh Stream - headwaters to tidal limit	0	0h	-
Dwr Cymru Welsh Water	Bae Langland Swansea Overflow	Langland Bay	0	0h	-

Gower - Live Sewage

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