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Gower

Polluted by sewage 2,093 times in 2025 lasting 15,953 hours - That's 1.85 years!

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

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Live data for Gower in 2026

So far this year (as of 11 Aug 2026, 20:15) there has been 7,551 hours of sewage overflows, from 73 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Gower in 2025

55 Sites polluted by Dwr Cymru Welsh Water
2,093 sewage dumps
15,953 hours duration
That's 1.85 years. On average 5.7 times a day

Change Over Time

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Gower in 2025. 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water Loughor Est'Y LLANNANT WWTW LLANNANT ROAD SWANSEA 122 2,061 99.9
Dwr Cymru Welsh Water River Loughor GARNSWLLT STW LONGELIN AMMANFORD 103 1,864 99.9
Dwr Cymru Welsh Water Estuarial Waters Of Swansea Ba MUMBLES SPS KNAB ROCK MUMBLES SWANS 111 1,537 99.9
Dwr Cymru Welsh Water River Lliw Pont-y-cob Road CSO 120 1,028 98.3
Dwr Cymru Welsh Water Loughor Estuary SSO. PENCLAWDD SEWERAGE SCHEME 90 934 98.1
Dwr Cymru Welsh Water Burry Pill Reynoldson WwTW Settled Storm 34 810 100
Dwr Cymru Welsh Water Burry Pill REYNOLDSTON WASTEWATER TREATMENT WK 65 794 99.8
Dwr Cymru Welsh Water River Llan Cuckoo Mill SPS 48 774 98.1
Dwr Cymru Welsh Water River Lliw CSO BACH Y GWREIDDYN FARM PONTLLIW 140 723 72.6
Dwr Cymru Welsh Water Burry Estuary New Penclawdd Sewage PS Penclawdd 43 530 99.5
Dwr Cymru Welsh Water Burry Pill SCURLAGE SPS SCURLAGE SWANSEA 24 400 99.9
Dwr Cymru Welsh Water Loughor Estuary GOWERTON WwTW 49 361 99.9
Dwr Cymru Welsh Water River Lliw Rhosog P.S 61 333 99.9
Dwr Cymru Welsh Water Burry Pill LLANMADOC P.S.NO 2 EMERGEN 24 294 99.8
Dwr Cymru Welsh Water River Llan CWMBACH ROAD CSO COCKETT SWANSEA 79 277 98.9
Dwr Cymru Welsh Water Loughor Grovesend PS 64 260 99.8
Dwr Cymru Welsh Water Loughour Estuary BEN HUGHES FOUNDRY CSO OPP REV JAME 72 255 99.3
Dwr Cymru Welsh Water Estuary LLANRHIDIAN PS EMERG , , 73 254 99.9
Dwr Cymru Welsh Water Loughor PONTARDULAIS PS EMERG , , 35 234 99.9
Dwr Cymru Welsh Water Coastal Water At Brandy Cove BISHOPSTON STS BRANDY COVE LANE 18 210 99.8
Dwr Cymru Welsh Water River Lliw KINGSBRIDGE CSO GORSEINON SWANSEA 58 210 99.9
Dwr Cymru Welsh Water Morlais River New Crofty C Sewage PS Crofty Gower Crofty C SPS 30 178 95.2
Dwr Cymru Welsh Water River Llan CSO, Denver R’D Into Culvert Swansea 89 150 99.9
Dwr Cymru Welsh Water Clyne River Railway Inn SPS, Killay 21 146 99.9
Dwr Cymru Welsh Water River Lliw CSO APX 70YDS U/S R'WAY B'GE U 43 134 80.4
Dwr Cymru Welsh Water Swansea Bay OUTFALL A (CSO 201) JUN OF MUMBLES 13 110 97.5
Dwr Cymru Welsh Water River Lliw Gorseinon Factory CSO 25 107 99.3
Dwr Cymru Welsh Water Swansea Bay Duns Lane/Park street CSO 26 105 99.7
Dwr Cymru Welsh Water Unnamed Stream HILLEND LLANGENNITH P.S. SSO 25 102 99.9
Dwr Cymru Welsh Water Illston Stream Killy Willy PENNARD SPS OFF PENNARD DR SWANSEA 15 93 99.8
Dwr Cymru Welsh Water Swansea Bay SWO. NEAR NORTON AVENUE (POINT 71 90 98.9
Dwr Cymru Welsh Water River Llwchwr CSO .400 YDS D/S Cluence Dulai 13 80 99.5
Dwr Cymru Welsh Water Clyne River HEN PARC LANE PUMPING STATION 21 69 97.6
Dwr Cymru Welsh Water An River Llan BLAEN Y MAES POINT 65 CSO SWANSEA 36 66 99.8
Dwr Cymru Welsh Water Unnamed Stream To Loughor Estu CSO BRYNAFON ROAD GORSEINON SWANSEA 12 65 99.8
Dwr Cymru Welsh Water Sea SWO. 50 YARDS BELOW SHELL GARA KNEL 38 63 91.6
Dwr Cymru Welsh Water Burry Estuary BENSON ROAD CSO BENSON RD PENCLAWDD 15 54 99.8
Dwr Cymru Welsh Water River Llan CSO BRYNMOR RD SOC11 GOWERTON S124 39 47 99.7
Dwr Cymru Welsh Water Loughor Estuary Holythorne Crofty B Sewage PS 18 44 97.5
Dwr Cymru Welsh Water Dulais Rear of No1 St Teilo St, Pontardulais 11 33 99.7
Dwr Cymru Welsh Water Surface Water Sewer Draining To Gors-Fawr Brook CSO at Junction of Brithwen Rd & Swansea Rd 20 18 79.6
Dwr Cymru Welsh Water River Llan Station Road CSO, Pen Y Cwm Swansea 32 18 98.5
Dwr Cymru Welsh Water Swansea Bay OUTFALL D1 (CSO 10) JUN OF MUMBLES 11 5 99.9
Dwr Cymru Welsh Water Washinghouse Brook ELMGROVE ROAD CSO 3 3 99.9
Dwr Cymru Welsh Water Coastal Waters At Overton Mere OVERTON STW PORT EYNON 1 3 99.8
Dwr Cymru Welsh Water Swansea Bay FAIRWOOD RD/LYNDEN TREE P H SWANSEA 9 2 98.5
Dwr Cymru Welsh Water River Llan Camarthen Rd CSO 3 1 99.8
Dwr Cymru Welsh Water Loughor Estuary Via Surface Water Sewer HEOL PENTRE BACH CSO GORSEINON 3 1 99.5
Dwr Cymru Welsh Water Limeslade Bay LIMESLADE PUMPING STATION SWANSEA 5 1 99.8
Dwr Cymru Welsh Water River Lliw GORSEINON 2 S121 BAKO CSO GORSEINON 2 1 99.5
Dwr Cymru Welsh Water Langland Bay LANGLAND SPS LANGLAND SWANSEA 3 1 100
Dwr Cymru Welsh Water Loughor Estuary Cefn Stylle P.S. Gowerton 2 0 99.9
Dwr Cymru Welsh Water Swansea Bay Storm Overflow at Outfall G via CSO 16 2 0 100
Dwr Cymru Welsh Water Swansea Bay OUTFALL E (CSO 14) JUN OF MUMBLES R 2 0 99.8
Dwr Cymru Welsh Water Loughor Estuary Via Surface Water Sewer Borough Road CSO Gorseinon Swansea 1 0 99.2
Dwr Cymru Welsh Water Not Permitted BISHOPSTON G CHURCH LANE PS 0 0 99.9
Dwr Cymru Welsh Water Caswell Bay CASWELL BAY CAR PARK SPS CASWELL 0 0 99.7
Dwr Cymru Welsh Water River Llan Kingsway CSO 0 0 85
Dwr Cymru Welsh Water Burry Pill. LLANMADOC PS NO. 1 EMERGEN 0 0 99.9
Dwr Cymru Welsh Water Swansea Bay OFF LLIPUT LANE POINT 130 CSO SWAN 0 0 100
Dwr Cymru Welsh Water Coastal Waters At Overton Mere OVERTON STW PORT EYNON 0 0 100

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. Live sewage data from Stream Water API

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.

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