Aberconwy polluted by sewage 3,645 times in 2023 - lasting 34,894 hours
- but monitoring was disabled in some locations, so could be more

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Aberconwy in 2023
55 Sites polluted by Dwr Cymru Welsh Water
3,645 sewage dumps
34,894 h duration
That's 4.04 years! On average 10 times a day
Change Over Time

Pollution Summary 2023

Here are all the reported sewage overflow totals for Aberconwy in 2023. 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 59 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 Llugwy Capel Curig Sd.Scheme CSO 237 4,677 100
Dwr Cymru Welsh Water River Lledr Screened Storm Sewage at Dolwyddelan WwTW 203 4,306 99.7
Dwr Cymru Welsh Water Unnamed Ditch Cwm Penmachno - CSO 194 3,867 98.6
Dwr Cymru Welsh Water Coastal Waters Of Conwy Bay PENMAENMAWR WWTW PENMAENMAWR 201 3,100 100
Dwr Cymru Welsh Water River Dulyn Dolgarrog CSO No. 2 170 2,905 100
Dwr Cymru Welsh Water River Crafnant SPS at Trefriw STW 132 2,168 100
Dwr Cymru Welsh Water River Llugwy Mill Rd SPS 111 1,986 100
Dwr Cymru Welsh Water Coastal Waters Of Penrhyn Bay GANOL WWTW (STW) GLAN CONWY CORNER 330 1,676 99.8
Dwr Cymru Welsh Water River Wydden GLANWYDDAN PUMPING STATION 75 952 96.6
Dwr Cymru Welsh Water Conwy Estuary GLAN CONWY SPS 61 936 97.2
Dwr Cymru Welsh Water Conwy Bay DALE ROAD STORM SPS LLANDUDNO 258 935 99.9
Dwr Cymru Welsh Water River Machno LLAN PENMACHNO STW SCREENED CSO 85 870 99.7
Dwr Cymru Welsh Water River Hiraethlyn Settled Storm Overflow at Eglwysbach Wastewater Treatment Works 36 776 100
Dwr Cymru Welsh Water River Hiraethlyn EGLWYSBACH STW 58 774 100
Dwr Cymru Welsh Water River Roe CSO at Rowen STW 138 602 99.9
Dwr Cymru Welsh Water River Conwy Settled Storm Storage at Llanrwst STW Llanwrst Conwy 57 592 99.8
Dwr Cymru Welsh Water River Conwy SPS at Llanrwst STW Llanrwst Conwy 120 476 99.8
Dwr Cymru Welsh Water River Conwy Waterloo SPS 39 407 100
Dwr Cymru Welsh Water River Llugwy Pentre Ddu CSO, Betws-y-Coed 46 322 92.6
Dwr Cymru Welsh Water River Lledr CSO & SPS Nr 2250 Dolwyddlean 45 274 97.6
Dwr Cymru Welsh Water River Conwy Dolgarreg Tan Y Fford SPS 46 272 99.3
Dwr Cymru Welsh Water River Nant-Y-Goron BRYN AFON CSO 197 199 99.5
Dwr Cymru Welsh Water Penrhyn Bay Via Surface Water Sewer CSO at Penrhyn Isaf Road 99 197 88.8
Dwr Cymru Welsh Water Penrhyn Bay PENRHYN BAY PS MORFA RD PENRHYN BAY 35 195 97.8
Dwr Cymru Welsh Water River Conwy Tan Y Fford CSO 140 194 99.3
Dwr Cymru Welsh Water River Conwy Betws y Coed Golf Club PS 9 193 2.6
Dwr Cymru Welsh Water Llanfairfechan LLANFAIRFECHAN - SSO 62 161 41
Dwr Cymru Welsh Water Conwy Bay WEST SHORE PS ABBEY ROAD LLANDUDNO 30 153 88.2
Dwr Cymru Welsh Water River Conwy DEGANWY PS MARINE CRESCENT DEGANWY 119 140 99.8
Dwr Cymru Welsh Water River Conwy CSO NEAR PS NO 2 TREFRIW 30 99 47.4
Dwr Cymru Welsh Water Llanfairfechan LLANFAIRFECHAN SSO NO. 1 54 94 98.9
Dwr Cymru Welsh Water River Conwy Betwys Y Coed Muriau P.S. 44 59 100
Dwr Cymru Welsh Water River Conwy LLANDUDNO JUNCTION PS 29 57 100
Dwr Cymru Welsh Water River Wydden MARL DRIVE CSO LLANDUDNO JUNCTION 7 45 100
Dwr Cymru Welsh Water Unnamed Watercourse Tan-y-Fedw CSO, Trefriw (MH No. 104) 7 32 99.9
Dwr Cymru Welsh Water Unnamed Ditch LLANDUDNO LLANRHOS SPS 11 25 99.8
Dwr Cymru Welsh Water River Conwy TYWYN PS 20 21 99.9
Dwr Cymru Welsh Water Coastal Waters PENMAENMAWR PROMENADE PS 15 19 99.9
Dwr Cymru Welsh Water Coastal Waters Via Sw Culvert STATION ROAD CSO 16 19 100
Dwr Cymru Welsh Water Unnamed Watercourse IND ESTATE LLANDUDNO JUNCTION GLAN 2 18 98.5
Dwr Cymru Welsh Water Conwy Estuary DEGANWY ROAD DEGANWY 11 15 99.7
Dwr Cymru Welsh Water Conwy Estuary MORFA PS MORFA DRIVE MORFA CONWY 6 12 99.9
Dwr Cymru Welsh Water River Conwy QUAY PS CONWY QUAY CONWY 3 11 99.9
Dwr Cymru Welsh Water River Conwy Tyn Y Groes STW - Storm Overflow 5 9 99.8
Dwr Cymru Welsh Water Un-Named Stream PENRHYN BAY LLANDUNDNO ROAD - 5 9 99.8
Dwr Cymru Welsh Water Ganol PENRHYN BAY LLANDUNDNO ROAD - 22 9 99.7
Dwr Cymru Welsh Water Gyrach PENMAENMAWR WWTW PENMAENMAWR 3 8 100
Dwr Cymru Welsh Water Coastal Waters - Penrhyn Bay PENRHYN HILL PENRHYN BAY 8 3 96
Dwr Cymru Welsh Water A Culverted River Conwy Llanwrst CSO 5 1 88.4
Dwr Cymru Welsh Water Conway Bay LLANFAIRFECHAN HOSPITAL SPS 1 1 100
Dwr Cymru Welsh Water River Ganol GANOL STW PS GLAN CONWY CORNER 4 1 99.6
Dwr Cymru Welsh Water Gyffin ST. AGNES ROAD CSO 1 0 100
Dwr Cymru Welsh Water Unnamed Ditch DEGANWY BEACH SPS 1 0 100
Dwr Cymru Welsh Water Gyffin HENDRE ROAD SSO 1 0 100
Dwr Cymru Welsh Water River Wydden WOODLANDS P.S WOODLANDS ESTATE MARL 1 0 100
Dwr Cymru Welsh Water River Llugwy Betws y Coed WwTW Settled Storm 0 0 99.8
Dwr Cymru Welsh Water Estuarial Waters Of River Conwy Gyffin PS Morfa Bach Conwy 0 0 99.8
Dwr Cymru Welsh Water Nant Garreg Ddu GLAN Y MOR PUMPING STATION 0 0 0
Dwr Cymru Welsh Water River Wydden CONWY ROAD STORM PS 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

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.