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Area of Outstanding Natural Beauty

Gower - Live Sewage

Polluted by sewage 2,085 hours in 2026 so far..

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

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Totals for 2026

Sewage2,085 hours
Monitoring offline0 hours
Potential pollution0 hours
Storm overflows25

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Daily Data - when it rained, and when they spilled

Square = rainfall none → heavy
Drop = sewage minutes → all day
Potential pollution Monitoring offline
Jan - 524 hours
Feb - 658 hours
Mar - 141 hours
Apr - 0 hours
May - 329 hours
Jun - 393 hours
Jul - 0 hours
Aug - 18 hours
Sept - 18 hours
Oct - 1 hours
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
We don't have rainfall data for Gower - the Welsh AONBs and the Isles of Scilly have no nearby rainfall station, so only sewage is shown. If you know where to source it please let us know!

Storm overflows in and around Gower

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Dwr Cymru Welsh Water Mumbles Knab Rock Storm Overflow Estuarial Waters of Swansea Bay 89 1,409h -
Dwr Cymru Welsh Water Scurlage Overflow Tributary of Burry Pill 16 230h 30m -
Dwr Cymru Welsh Water Frogmore Storm overflow Oxwich Marsh Stream 29 156h -
Dwr Cymru Welsh Water Parkmill Overflow Mill Leat 11 78h 15m -
Dwr Cymru Welsh Water Chapel Road Crofty Storm Overflow Morlais River 10 61h 58m -
Dwr Cymru Welsh Water Bishopston WwTW Storm Overflow Coastal Waters - Brandy Cove 4 43h 30m -
Dwr Cymru Welsh Water Llanrhidian PS Overflow Estuary 12 22h 59m -
Dwr Cymru Welsh Water Llangennith Hillend Storm Overflow Unnamed Stream 8 16h 59m -
Dwr Cymru Welsh Water Pennard Overflow Ilston Stream 5 16h 45m -
Dwr Cymru Welsh Water Rhossili WwTW Overflow Carmarthen Bay 5 15h 15m -
Dwr Cymru Welsh Water Hen Parc Lane Overflow Unnamed Tributary of the Clyne River 5 10h 51m -
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 Gower Road Upper Killay Storm Overflow River Clun 2 5h 45m -
Dwr Cymru Welsh Water Mayals Road Storm Overflow Swansea Bay 1 0h 14m -
Dwr Cymru Welsh Water Cheriton Overflow Burry Pill 0 0h -
Dwr Cymru Welsh Water Langland Bay Swansea Overflow Langland Bay 0 0h -
Dwr Cymru Welsh Water Limeslade Overflow Limeslade Bay 0 0h -
Dwr Cymru Welsh Water Bryn Y Mor Road Storm Overflow Pennard Pill 0 0h -
Dwr Cymru Welsh Water Overton WwTW Storm Overflow Coastal Waters - Overton Mere 0 0h -
Dwr Cymru Welsh Water Reynoldston WwTW Storm Overflow Burry Pill 0 0h -
Dwr Cymru Welsh Water The Nook Oxwich Storm Overflow Oxwich Marsh Stream - headwaters to tidal limit 0 0h -
Dwr Cymru Welsh Water Unknown Unknown 0 0h -
Dwr Cymru Welsh Water Bishopston Overflow River Teifi 0 0h -
Dwr Cymru Welsh Water Bae Langland Swansea Overflow Langland Bay 0 0h -

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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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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Analysing sewage pollution by the Water Industry

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

Some data reproduced under Open Government Licence

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