Clwyd East - 2025 Sewage

Polluted by sewage 4,261 hours in 2025

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

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You're looking at the totals that we have calculated for sewage in Clwyd East 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 Clwyd East

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Clwyd East, 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 Ruthin WwTW Overflow River Clwyd 71 844 h 8m 35.17
Dwr Cymru Welsh Water Llangollen WwTW Storm Overflow River Dee 37 311 h 30m 12.96
Dwr Cymru Welsh Water Wat'sDyke Avenue Holywell Storm Overflow Unnamed stream 13 266 h 11.08
Dwr Cymru Welsh Water Bronallt Leeswood Storm Oveerflow Unnamed Tributary of Afon Alyn 24 231 h 15m 9.62
Dwr Cymru Welsh Water Trefnant WwTW Overflow River Clwyd 47 227 h 45m 9.46
Dwr Cymru Welsh Water Mold WwTW Storm Overflow Tributary of Afon Alyn 32 161 h 6.71
Dwr Cymru Welsh Water Llangollen Queen Street Storm Overflow River Cyflymen 40 161 h 6.71
Dwr Cymru Welsh Water Greenfield Road Holywell Storm Overflow Greenfield Valley "Holywell" stream 41 128 h 17m 5.33
Dwr Cymru Welsh Water Abbey Road Storm Overflow River Dee 33 96 h 30m 4
Dwr Cymru Welsh Water A549 Mold Storm Overflow Tributary of the Afon Alyn 31 93 h 45m 3.88
Dwr Cymru Welsh Water Llanasa WwTW Storm Overflow Unnamed Watercourse 11 88 h 15m 3.67
Dwr Cymru Welsh Water Llanfair Dyffryn Clwyd WwTW Storm Overflow Dwr Ial 25 87 h 3.62
Dwr Cymru Welsh Water Llanerch-Y-Mor A548 Storm Overflow Llanerchymor Gutter 19 83 h 36m 3.46
Dwr Cymru Welsh Water Gladstone Street Glanrafon Road Storm Overflow Unnamed Tributary of the River Alyn 23 82 h 25m 3.42
Dwr Cymru Welsh Water Chambers Lane Mercia Drive Junction Storm Overflow No2 Tributary of Afon Alyn 34 81 h 58m 3.38
Dwr Cymru Welsh Water Mercia Drive Mold Storm Overflow Surface Water Sewer 26 81 h 5m 3.38
Dwr Cymru Welsh Water Chambers Lane Mercia Drive Junction Storm Overflow Tributary of Afon Alun 27 77 h 57m 3.21
Dwr Cymru Welsh Water Gwydelwern Storm Overflow Afon Camddwr 6 76 h 45m 3.17
Dwr Cymru Welsh Water Wats Duke Avenue Storm Overflow Tributary of Afon Alyn 18 76 h 30m 3.17
Dwr Cymru Welsh Water Llanarmon Yn Ial WwTW Overflow River Alyn 38 74 h 3.08
Dwr Cymru Welsh Water Nannerch Storm Overflow Tributary of River Wheeler 8 62 h 45m 2.58
Dwr Cymru Welsh Water Brynford Crooked Horn Overflow Tributary of Afon Chwiler 13 60 h 34m 2.5
Dwr Cymru Welsh Water Northop WwTW Settled Storm Overflow Northop Brook 12 58 h 55m 2.42
Dwr Cymru Welsh Water Talacre Road Storm Overflow Maescoed Drains 10 58 h 45m 2.42
Dwr Cymru Welsh Water Bridge Street No 2 Storm Overflow River Dee 31 51 h 30m 2.12
Dwr Cymru Welsh Water Dyserth WwTW Inlet Overflow Glanfyddion Stream 12 51 h 15m 2.12
Dwr Cymru Welsh Water Llanasa Headworks Storm Overflow Prestatyn Gutter 8 43 h 3m 1.79
Dwr Cymru Welsh Water Dyserth WwTW Storm Overflow Afon Glanffyddion 11 42 h 30m 1.75
Dwr Cymru Welsh Water Llanferres Storm Overflow Tributary of Afon Alun 5 35 h 45m 1.46
Dwr Cymru Welsh Water Llangollen West Street Storm Overflow River Dee 7 35 h 14m 1.46
Dwr Cymru Welsh Water Pen Y Maes Road Holywell Storm Overflow Unnamed Tributary of the Dee Estuary 43 34 h 28m 1.42
Dwr Cymru Welsh Water Bryn Awelon Mold Storm Overflow Tributary of Black Brook 7 33 h 45m 1.38
Dwr Cymru Welsh Water Ffordd Penrhwylfa Meliden Storm Overflow Prestatyn Gutter 8 33 h 41m 1.38
Dwr Cymru Welsh Water Corwen Road Junction Pontblyddyn Storm Overflow River Alyn 6 31 h 15m 1.29
Dwr Cymru Welsh Water Near Bagillt Road Greenfield Storm Overflow River Dee 3 29 h 14m 1.21
Dwr Cymru Welsh Water Greenfield Knitmesh Overflow Afon Marsiandwr 10 28 h 30m 1.17
Dwr Cymru Welsh Water Fford Ddyfrdwy Maes Pennant B Storm Overflow Drain Tributary of the Dee Estuary 4 24 h 51m 1
Dwr Cymru Welsh Water Fairfield Avenue Ffynnongroew Overflow Ffynnongroew Drain 3 20 h 15m 0.83
Dwr Cymru Welsh Water Greenfield Terminal Overflow Holywell Stream 12 18 h 27m 0.75
Dwr Cymru Welsh Water Morfa Camp Overflow New Drain Talacre 6 16 h 30m 0.67
Dwr Cymru Welsh Water Village Road Northop Hall Storm Overflow Wepre Brook 8 15 h 0.62
Dwr Cymru Welsh Water Milford Street and Bro Alun Mold Overflow River Alyn 7 14 h 42m 0.58
Dwr Cymru Welsh Water Off Church Terrace Llandegla Storm Overflow River Alyn 6 14 h 0.58
Dwr Cymru Welsh Water Meliden Road Prestatyn Storm Overflow Prestatyn Gutter 13 12 h 43m 0.5
Dwr Cymru Welsh Water Nant Y Coed Pen Y Maes Overflow Unnamed Triutary of the River Dee 9 12 h 30m 0.5
Dwr Cymru Welsh Water Pentre Halkyn Overflow Unnamed Tributary of Nant-Y-Flint 6 11 h 45m 0.46
Dwr Cymru Welsh Water Greenfield WwTW Storm Overflow Estuarial Waters of the River Dee 5 10 h 30m 0.42
Dwr Cymru Welsh Water Gas Lane Mold Storm Overflow Unnamed Tributary of Afon Alyn 9 8 h 26m 0.33
Dwr Cymru Welsh Water Bromfield Lane Mold Storm Overflow Tributary of Afon Alyn 9 8 h 0.33
Dwr Cymru Welsh Water Leeswood Bethania Storm Overflow Nant Brook 4 7 h 15m 0.29
Dwr Cymru Welsh Water Pontblyddyn Dingle Road Storm Overflow River Alyn 1 6 h 15m 0.25
Dwr Cymru Welsh Water Victoria Road Prestatyn Storm Overflow Prestatyn Gutter 3 6 h 3m 0.25
Dwr Cymru Welsh Water Fford Ddyfrdwy Maes Pennant A Storm Overflow Tributary of the Dee Estuary 14 5 h 4m 0.21
Dwr Cymru Welsh Water Prestatyn The Mall Storm Overflow Prestatyn Gutter 2 4 h 30m 0.17
Dwr Cymru Welsh Water Victoria Terrace Mold Storm Overflow River Alyn 2 4 h 14m 0.17
Dwr Cymru Welsh Water Southwest of York Close Prestatyn Overflow Rhyl Cut 2 4 h 0.17
Dwr Cymru Welsh Water Bastion Road Prestatyn Overflow Prestatyn Gutter 3 2 h 45m 0.08
Dwr Cymru Welsh Water The Boulevard Prestatyn Storm Overflow Ditch discharging to Prestatyn Gutter 4 1 h 55m 0.04
Dwr Cymru Welsh Water Bridge Street Storm Overflow No1 River Dee 2 1 h 45m 0.04
Dwr Cymru Welsh Water Berwyn Street Storm Overflow River Dee via surface water sewer 2 1 h 45m 0.04
Dwr Cymru Welsh Water Llangollen East Street Storm Overflow River Dee 4 1 h 15m 0.04
Dwr Cymru Welsh Water Llangollen Church Street Storm Overflow River Dee 1 1 h 14m 0.04
Dwr Cymru Welsh Water A548 Road Bridge Storm Overflow Greenfield Valley "Holywell" stream 3 1 h 0.04
Dwr Cymru Welsh Water Mostyn Coast Road Overflow Tributary of the River Dee 1 0 h 58m 0
Dwr Cymru Welsh Water Wared Drive Northhop Hall Storm Overflow Surface Water 2 0 h 44m 0
Dwr Cymru Welsh Water Fford Argoed Fields Storm Overflow River Alyn 2 0 h 30m 0
Dwr Cymru Welsh Water Ysceifiog Storm Overflow Tributary of Afon Chwiler 1 0 h 15m 0
Dwr Cymru Welsh Water Maes Y Dre Mold Storm Overflow River Alyn 1 0 h 15m 0
Dwr Cymru Welsh Water Talacre Argoed Station Road Overflow Gutter Fawr 1 0 h 15m 0
Dwr Cymru Welsh Water Mostyn Docks Overflow Tributary of the River Dee 1 0 h 15m 0
Dwr Cymru Welsh Water Mostyn Coastal Road Storm Overflow Tributary of the Dee estuary 0 0 h 0
Dwr Cymru Welsh Water Llangollen Riverside Park Storm Overflow River Dee 0 0 h 0
Dwr Cymru Welsh Water Unknown Unknown 0 0 h 0
Dwr Cymru Welsh Water Bryn Coch Lane Mold Storm Overflow Unnamed Tributary of Afon Alyn 0 0 h 0
Dwr Cymru Welsh Water Ffordd Parc Bodnant Prestatyn Overflow Railway Ditch 0 0 h 0
Dwr Cymru Welsh Water Llygain-Y-Wern Pentre Halkyn Storm Overflow Tributary of Nan Y Flint 0 0 h 0
Dwr Cymru Welsh Water Picton Road Pen Y Ffordd Storm Overflow Unnamed stream 0 0 h 0
Dwr Cymru Welsh Water Llandyrnog WwTW Storm Overflow River Clwyd 0 0 h 0
Dwr Cymru Welsh Water Llangollen Victoria Prom Storm Overflow River Dee 0 0 h 0
Dwr Cymru Welsh Water Gwespyr Storm Overflow Unnamed stream 0 0 h 0
Dwr Cymru Welsh Water Unknown Unknown 0 0 h 0
Dwr Cymru Welsh Water Glanyrafon Terrace Storm Overflow Afon y Garth 0 0 h 0
Dwr Cymru Welsh Water Junction of B5121 and A548 Greenfield Storm Overflow Unnamed Stream 0 0 h 0
Dwr Cymru Welsh Water Park Avenue Storm Overflow River Dee 0 0 h 0
Dwr Cymru Welsh Water Ffynnongroew Tan Lan Bach Storm Overflow Tan Lan Drains 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

Some data reproduced under Open Government Licence

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