Clwyd East was polluted by sewage 2,091 times in 2024
lasting 11,093 hours - that's 1.28 years!
- but monitoring was disabled in some locations, so could be more

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Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
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✔ means we have experimental daily data since 2023
Totals for Clwyd East in 2024
68 Sites polluted by Dwr Cymru Welsh Water
2,091 sewage dumps
11,093 h duration
That's 1.28 years! On average 5.7 times a day
Change Over Time
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Pollution Summary 2024

Here are all the reported sewage overflow totals for Clwyd East in 2024. 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 1 of the total 75 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water River Clwyd RUTHIN STW (FINAL) 107 1,298 99.9
Dwr Cymru Welsh Water River Alyn MOLD WwTW 106 1,079 99.6
Dwr Cymru Welsh Water River Alun Leeswood Transfer SPS 79 968 99.9
Dwr Cymru Welsh Water River Dee LLANGOLLEN WWTW 74 736 99.9
Dwr Cymru Welsh Water Gutter Fawr LLANASA PS CSO / EO 56 604 99.9
Dwr Cymru Welsh Water Northop Brook Northop Wastewater Treatment Works Settled Storm 66 455 99.9
Dwr Cymru Welsh Water River Alyn CSO Mynydd Isa Chambers Lane/Mercia Drive Nr 2 103 393 97.6
Dwr Cymru Welsh Water River Alyn CSO at Mynydd Isa Wylfa Hill 79 386 99.9
Dwr Cymru Welsh Water River Alyn LLANARMON-YN-IAL STW 84 352 99.9
Dwr Cymru Welsh Water Dwr Ial LLANFAIR DC STW 66 335 99.9
Dwr Cymru Welsh Water S W Sewer MYNYDD ISA WATS DYKE AVE PS 58 312 99.9
Dwr Cymru Welsh Water River Dee MARSH FARM PUMPING STATION 31 312 99.8
Dwr Cymru Welsh Water River Alyn Bridge Inn Pumping Station 28 305 79.8
Dwr Cymru Welsh Water Tan Lan Drains CSO at Tanlan Bach Pumping Station 26 299 99.9
Dwr Cymru Welsh Water Prestatyn Gutter PRESTATYN SPS MARINE RD EAST 44 275 99.8
Dwr Cymru Welsh Water Alun Llanferres SPS 20 272 99.8
Dwr Cymru Welsh Water Nant Y Flint PENTRE HALKYN SPS 31 258 99.9
Dwr Cymru Welsh Water River Cylflymen CSO at THE REAR OF THE TANNERY 49 188 99.9
Dwr Cymru Welsh Water Surface Water System MYNYDD ISA MOLD ROAD/MERCIA DR CSO 59 163 96.3
Dwr Cymru Welsh Water Holywell Stream GREENFIELD PARENT CSO HOLYWELL 90 161 86.5
Dwr Cymru Welsh Water Dee HAND HOTEL GARDENS CSO 71 144 99.9
Dwr Cymru Welsh Water Llanerchymor Gutter MOSTYN NEAR FUN SHIP - SSO 28 133 98.3
Dwr Cymru Welsh Water River Dee Abbey Road CSO 51 131 99.9
Dwr Cymru Welsh Water Black Brook Mold Bryn Awelon - CSO 34 126 99.9
Dwr Cymru Welsh Water Overflow Via Sewerage System S PRESTATYN PURBECK PS 25 125 99.9
Dwr Cymru Welsh Water Sw System DISCHARGE B 14 FFORDD DDYFRDWY 14 119 98.8
Dwr Cymru Welsh Water River Glanffyddion DYSERTH STW 39 105 99.9
Dwr Cymru Welsh Water Wheeler Nannerch SPS 21 102 58
Dwr Cymru Welsh Water Greenfield Valley CSO Adjacent A548 Road Bridge 46 102 99.9
Dwr Cymru Welsh Water River Dee PEN Y MAES PUMPING STATION 36 96 99.9
Dwr Cymru Welsh Water Prestatyn Gutter Meliden Holding Tank - CSO 17 89 97.8
Dwr Cymru Welsh Water Unnamed W/C HOLYWELL PEN Y MAES RD/PEN Y M 102 84 65.5
Dwr Cymru Welsh Water Tref Y Nant Brook Trefor Isaf - CSO 23 76 99.9
Dwr Cymru Welsh Water Wepre Brook Northop Hall SPS 18 72 99.9
Dwr Cymru Welsh Water Nant Brook Via A Ditch Leeswood Bethania SPS 11 44 99.9
Dwr Cymru Welsh Water River Alyn CSO at Mold Committee's Sewerage System 39 40 99.9
Dwr Cymru Welsh Water River Alyn Llanarmon yn Ial WwTW (Storm) 7 33 100
Dwr Cymru Welsh Water River Dee GREENFIELD IND EST NO 1 HOLYWELL 7 29 70.1
Dwr Cymru Welsh Water River Alyn PONTBLYDDYN NO 1 PUMPING STATION 8 26 99.9
Dwr Cymru Welsh Water River Alun LLANDEGLA CSO , , 11 24 99.9
Dwr Cymru Welsh Water Prestatyn Gutter PRESTATYN MELIDEN ROAD - SSO 54 22 98.3
Dwr Cymru Welsh Water An Open Discharging To Prestatyn Gutter Dyserth Bay SPS 4 18 98.8
Dwr Cymru Welsh Water Dolfechlas Brook RHYDYMWYN STW 2 18 99.9
Dwr Cymru Welsh Water River Alyn CSO at Mold Gladstone St/Glan Yr Afon Rd 20 17 98.7
Dwr Cymru Welsh Water River Alyn Mold Gas Lane CSO 21 15 98.7
Dwr Cymru Welsh Water River Camddwr GWYDDELWERN PS. - EMERGENCY SC 2 14 6
Dwr Cymru Welsh Water River Dee Llangollen Riverside Park Printing Works CSO 3 14 84.8
Dwr Cymru Welsh Water River Dee Estuary DISCHARGE A 14 FFORDD DDYFRDWY 10 13 43.1
Dwr Cymru Welsh Water River Alyn Mold Football Club Drice CSO 8 13 98.3
Dwr Cymru Welsh Water Dee Estuary GREENFIELD WWTW (STW) GREENFIELD 20 13 100
Dwr Cymru Welsh Water River Dee Park Avenue CSO 3 12 99.9
Dwr Cymru Welsh Water Maescoed Drain TALACRE STATION ROAD PS 2 9 13.3
Dwr Cymru Welsh Water River Dee Via Surface Water Sewer BERWYN STREET CSO 8 7 99.9
Dwr Cymru Welsh Water River Alun Mynydd Isa Chambers lane/Mercia Drive CSO 11 7 98.9
Dwr Cymru Welsh Water River Alyn Mold Old St Davids Lane/Bridge St CSO 6 6 98.4
Dwr Cymru Welsh Water River Dee WEST STREET CSO 12 6 99.9
Dwr Cymru Welsh Water Estuarial Waters Of River Dee GREENFIELD WWTW (STW) GREENFIELD 10 4 100
Dwr Cymru Welsh Water River Dee Llangollen East St CSO 7 3 85.9
Dwr Cymru Welsh Water River Dee Royal Hotel CSO 2 2 99.9
Dwr Cymru Welsh Water Surface Water Sewer Northop Hall CSO 4 2 93.4
Dwr Cymru Welsh Water Clwyd Llandyrnog WWTW 3 2 99.9
Dwr Cymru Welsh Water Nant Y Flint Lygan-Y-Wern Pentre Halkyn SPS 5 1 99.8
Dwr Cymru Welsh Water Unnamed W/C GREENFIELD A548 NR ABBEY MILL 3 1 99.2
Dwr Cymru Welsh Water Unnamed W/C GWESPYR OLD STW - SSO 1 0 99.1
Dwr Cymru Welsh Water River Dee Llangollen Chruch St CSO 2 0 99.4
Dwr Cymru Welsh Water River Alyn Mold Bryn Coch Lane/Lon Y Parc CSO 2 0 98.2
Dwr Cymru Welsh Water Overflow Via Sewage System Sur PRESTATYN NANT PS 1 0 99.9
Dwr Cymru Welsh Water Overflow Via Sewerage System S PRESTATYN MALL PS 1 0 99.9
Dwr Cymru Welsh Water River Wheeler YSCEIFIOG CSO 0 0 99.9
Dwr Cymru Welsh Water Unnamed W/C HOLYWELL STRAND WALK NR STRAND 0 0 98.9
Dwr Cymru Welsh Water River Dee Llangollen Victoria Prom Riverside CSO 0 0 98.9
Dwr Cymru Welsh Water Unnamed W/C PEN Y FFORDD ADJ PEN Y FFORDD 0 0 18.9
Dwr Cymru Welsh Water River Alyn Mold Argoed CSO 0 0 99.2
Dwr Cymru Welsh Water River Y Garth SWN Y DWR CSO 0 0 0
Dwr Cymru Welsh Water Dolfechlas Brook Rhydymwyn Wastewater Treatment Works Storm Overflow 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. This 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.