Gower - 2025 Sewage

Polluted by sewage 15,378 hours in 2025 - That's 1.78 years

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

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View Annual Sewage Data

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

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Constituencies near Gower

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Gower, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.

Each CSO has a row, the most recent data is on the right hand side.

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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
Dwr Cymru Welsh Water Llannant WwTW Storm Overflow Tributary of Afon Llwchwr 105 1,854 h 59m 77.25
Dwr Cymru Welsh Water Garnswllt WwTW Storm Overflow River Loughor 84 1,559 h 64.96
Dwr Cymru Welsh Water Mumbles Knab Rock Storm Overflow Estuarial Waters of Swansea Bay 100 1,374 h 30m 57.25
Dwr Cymru Welsh Water Pont y Cob Road Storm Overflow Afon Lliw 108 1,016 h 48m 42.33
Dwr Cymru Welsh Water Pontilw Storm Overflow Afon Lliw 116 999 h 45m 41.62
Dwr Cymru Welsh Water Blodwen Terrace Storm Overflow Loughor Estuary 69 903 h 55m 37.62
Dwr Cymru Welsh Water Reynoldston WwTW Storm Overflow Burry Pill 59 723 h 30.12
Dwr Cymru Welsh Water Cuckoo Mill Storm Overflow Afon Llan 36 545 h 27m 22.71
Dwr Cymru Welsh Water Bwrw Road Loughor Overflow Llwchwr 80 494 h 37m 20.58
Dwr Cymru Welsh Water Penclawdd Into Loughor Estuary Storm Overflow Burry Estuary 37 480 h 1m 20
Dwr Cymru Welsh Water Waun Road Loughor Overflow Llwchwr 69 386 h 8m 16.08
Dwr Cymru Welsh Water Scurlage Overflow Tributary of Burry Pill 20 378 h 26m 15.75
Dwr Cymru Welsh Water Gowerton WwTW Storm Overflow Loughor Estuary 42 329 h 13.71
Dwr Cymru Welsh Water Rhosog Storm Overflow Afon Lliw 53 309 h 15m 12.88
Dwr Cymru Welsh Water Cwm Ivy Overflow Burry Pill 22 293 h 45m 12.21
Dwr Cymru Welsh Water Bwlch Road Glanymor Road Storm Overflow River Loughor 64 292 h 47m 12.17
Dwr Cymru Welsh Water Cwmbach Road Storm Overflow Afon Llan 60 280 h 7m 11.67
Dwr Cymru Welsh Water Chapel Road Crofty Storm Overflow Morlais River 39 245 h 19m 10.21
Dwr Cymru Welsh Water Gorseinon Grovesend Storm Overflow Llwchwr Estuary 51 239 h 9.96
Dwr Cymru Welsh Water Waun Road Loughor No.2 Storm Overflow Afon Lliw 70 211 h 57m 8.79
Dwr Cymru Welsh Water Llanrhidian PS Overflow Estuary 37 195 h 10m 8.12
Dwr Cymru Welsh Water Loughor Kings Bridge Storm Overflow Afon Lliw 45 191 h 3m 7.96
Dwr Cymru Welsh Water Bishopston WwTW Storm Overflow Coastal Waters - Brandy Cove 17 184 h 15m 7.67
Dwr Cymru Welsh Water Libanus Road Gorseinon Overflow Afon Lliw 44 170 h 15m 7.08
Dwr Cymru Welsh Water Gower Road Upper Killay Storm Overflow River Clun 21 144 h 15m 6
Dwr Cymru Welsh Water Newton Road Overflow Caswell Bay 75 139 h 30m 5.79
Dwr Cymru Welsh Water Frogmore Storm overflow Oxwich Marsh Stream 26 117 h 22m 4.88
Dwr Cymru Welsh Water Newton Road Swansea Overflow Swansea Bay 51 113 h 34m 4.71
Dwr Cymru Welsh Water Llangennith Hillend Storm Overflow Unnamed Stream 22 98 h 26m 4.08
Dwr Cymru Welsh Water Parkmill Overflow Mill Leat 26 93 h 35m 3.88
Dwr Cymru Welsh Water Pontadulais Storm Overflow River Loughor 11 88 h 46m 3.67
Dwr Cymru Welsh Water Cranmer Court Storm Overflow Unnamed Tributary of Afon Llan 27 84 h 3m 3.5
Dwr Cymru Welsh Water Gowerton Brynymor Road Storm Overflow Tributary of Afon Llan 30 81 h 3.38
Dwr Cymru Welsh Water Gorseinon Road Penllergaer Storm Overflow Afon Lliw 20 74 h 14m 3.08
Dwr Cymru Welsh Water Junction of The Dunns and Mumbles Road The Mumbles Storm Overflow Swansea Bay 16 66 h 31m 2.75
Dwr Cymru Welsh Water Benson Road Storm Overflow Culvert leading to Burry Estuary 11 63 h 42m 2.62
Dwr Cymru Welsh Water Rhossili WwTW Overflow Carmarthen Bay 18 63 h 15m 2.62
Dwr Cymru Welsh Water Norton Road and Avenue Junction Swansea Storm Overflow Swansea Bay 32 60 h 23m 2.5
Dwr Cymru Welsh Water Promenade Terrace Swansea Storm Overflow Swansea Bay 9 54 h 50m 2.25
Dwr Cymru Welsh Water Denver Road Storm Overflow Afon Llan 46 52 h 15m 2.17
Dwr Cymru Welsh Water Loughor Pentrebach Storm Overflow Tributary of Afon Llwchwr 16 50 h 30m 2.08
Dwr Cymru Welsh Water Pennard Overflow Ilston Stream 5 46 h 45m 1.92
Dwr Cymru Welsh Water Loughor Brynafon Road Storm Overflow Tributary of Loughor Estuary 13 45 h 25m 1.88
Dwr Cymru Welsh Water Pen Y Cwm Cockett Storm Overflow Unnamed Tributary of Afon Llan 21 43 h 49m 1.79
Dwr Cymru Welsh Water Tidal Reach Pontarddulais Storm Overflow River Dulais 5 30 h 14m 1.25
Dwr Cymru Welsh Water Crofty B North of Trading Estate Storm Overflow Burry Estuary 12 29 h 29m 1.21
Dwr Cymru Welsh Water Hen Parc Lane Overflow Unnamed Tributary of the Clyne River 10 26 h 38m 1.08
Dwr Cymru Welsh Water Bryn Y Mor Road Gowerton Overflow Unnamed Watercourse 1 12 h 59m 0.5
Dwr Cymru Welsh Water Brithwen Road Junction with Swansea Road Storm Overflow Gors-Fawr Brook 10 9 h 55m 0.38
Dwr Cymru Welsh Water Norton Road Storm Overflow Swansea Bay 8 5 h 31m 0.21
Dwr Cymru Welsh Water Elmgrove Road Swansea Storm Overflow Washinghouse Brook 2 5 h 29m 0.21
Dwr Cymru Welsh Water Overton WwTW Storm Overflow Coastal Waters - Overton Mere 1 3 h 15m 0.12
Dwr Cymru Welsh Water New Well Lane Overflow Swansea Bay 8 2 h 57m 0.08
Dwr Cymru Welsh Water Camarthen Road Llewitha Storm Overflow Afon Llan 2 2 h 43m 0.08
Dwr Cymru Welsh Water Limeslade Overflow Limeslade Bay 6 2 h 0.08
Dwr Cymru Welsh Water Mayals Road Storm Overflow Swansea Bay 3 1 h 44m 0.04
Dwr Cymru Welsh Water Unknown Unknown 1 1 h 14m 0.04
Dwr Cymru Welsh Water Heol Pentre Bach Storm Overflow Tributary of Loughor Estuary 2 0 h 44m 0
Dwr Cymru Welsh Water Swansea Road Pontlliw Storm Overflow River Lliw 2 0 h 44m 0
Dwr Cymru Welsh Water Amy Dillwyn Close Storm Overflow Swansea Bay 3 0 h 44m 0
Dwr Cymru Welsh Water Swansea Fairwood Road Storm Overflow Washinghouse Brook 2 0 h 30m 0
Dwr Cymru Welsh Water CEFN Stylle Storm Overflow Tributary of Loughor Estuary 1 0 h 15m 0
Dwr Cymru Welsh Water Pontardulais Storm Overflow Loughor 0 0 h 0
Dwr Cymru Welsh Water Unknown Unknown 0 0 h 0
Dwr Cymru Welsh Water Borough Rd Storm overflow Tributary of Loughor Estuary 0 0 h 0
Dwr Cymru Welsh Water Bishopston Overflow River Teifi 0 0 h 0
Dwr Cymru Welsh Water Abergelly Road Kingsway Storm Overflow Tributary of Afon Llan 0 0 h 0
Dwr Cymru Welsh Water Liliput Lane Swansea Storm Overflow Swansea Bay 0 0 h 0
Dwr Cymru Welsh Water Gorseinon Road West of Roundabout Storm Overflow Unnamed Tributary of Afon Lliw 0 0 h 0
Dwr Cymru Welsh Water Bae Langland Swansea Overflow Langland Bay 0 0 h 0
Dwr Cymru Welsh Water Cheriton Overflow Burry Pill 0 0 h 0

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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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© 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

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