Islwyn polluted by sewage 2,128 times in 2023 - lasting 11,051 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 Islwyn in 2023
41 Sites polluted by Dwr Cymru Welsh Water
2,128 sewage dumps
11,051 h duration
That's 1.28 years! On average 5.8 times a day
Change Over Time

Pollution Summary 2023

Here are all the reported sewage overflow totals for Islwyn 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 2 of the total 47 CSO locations had reporting enabled for less than half the year, of which 2 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Dwr Cymru Welsh Water River Ebbw Tanybryn Risca CSO, Pontymister 115 1,479 98.7
Dwr Cymru Welsh Water Sirhowy River CSO 20 OLD MILL NEWPORT ROAD 141 1,404 99.8
Dwr Cymru Welsh Water River Rhymney CSO at Glan-yr-Afon Nursing Home No2, Pengam 121 1,080 98.8
Dwr Cymru Welsh Water River Rhymney Tredomen AFC CSO, Ystrad Mynach 95 1,045 100
Dwr Cymru Welsh Water River Ebbw Crosskeys Waunfawr Park CSO 104 1,023 96.3
Dwr Cymru Welsh Water Ebbw River CSO 36 CWMCARN HIGH SCHOOL CHAPEL F 78 684 100
Dwr Cymru Welsh Water River Bargoed Bedwellty Road CSO 159 611 74.6
Dwr Cymru Welsh Water River Sirhowy Springfield Est CSO, Pontllanfraith 119 574 97.9
Dwr Cymru Welsh Water River Sirhowy CSO 42 92 Tredegar St Cross Keys 57 560 100
Dwr Cymru Welsh Water River Sirhowy Bottom of Nine Mile Point Colliery CSO 49 324 95.7
Dwr Cymru Welsh Water Nant Carn Brook Pontywaun CSO, Newport 71 307 97
Dwr Cymru Welsh Water River Rhymney CSO at Glan-yr-Afon Nursing Home 1 101 245 99.3
Dwr Cymru Welsh Water River Rymney MAESYCWMMER A472 JUNCTION CSO 83 203 99.4
Dwr Cymru Welsh Water Sirhowy River Blackwood Cwmgelli CSO 60 163 85.7
Dwr Cymru Welsh Water River Rhymney TRELYN LANE CSO FLEUR-DE-LIS 17 140 9.9
Dwr Cymru Welsh Water Sirhowy River WVTS - Wattsville (Recreation Ground) CSO 55 129 98.6
Dwr Cymru Welsh Water Sirhowy River Blackwood Oakdale Rhiw Hill CSO 72 123 98.1
Dwr Cymru Welsh Water River Sirhowy Old Tram Rd CSO, Pontllanfraith 59 113 99.7
Dwr Cymru Welsh Water Sirhowy River CSO 19 Gryphonn Concrete Products 80 111 99.9
Dwr Cymru Welsh Water River Ebbw CSO 33 REAR BRYNGWYN ROAD/HIGH ST 61 108 97.8
Dwr Cymru Welsh Water River Rhymney CSO Opposite Bowen Ind Estate, Aberbargoed 35 103 97
Dwr Cymru Welsh Water Sirhowy River WVTS-WYLLIE HALT SSO 39 94 98.6
Dwr Cymru Welsh Water River Rhymney CSO at Pengham High St near Bridge 42 73 98.3
Dwr Cymru Welsh Water Sirhowy River CSO CWM ROAD ARGOED CAERPHILLY 23 54 99.7
Dwr Cymru Welsh Water Nant Gwyddon Via Surface Water Sewer And A Culvert High Street CSO, Abercarn 47 51 99.9
Dwr Cymru Welsh Water River Sirhowy CSO 16 Woodfield Row Blackwood 22 44 100
Dwr Cymru Welsh Water Ebbw Fawr CRUMLIN SWFFRYD CSO CAERPHILLY 52 42 73.9
Dwr Cymru Welsh Water Sirhowy River Markham Colliery Gun Club CSO 9 34 100
Dwr Cymru Welsh Water River Ebbw S/O 108 Commercial St, Risca CSO 41 31 99.3
Dwr Cymru Welsh Water Ebbw Fawr River 21 Gladstone St CSO, Crosskeys 26 26 98.6
Dwr Cymru Welsh Water River Rhymney CSO ASSET NO 90411 PENGAM 35 21 99.7
Dwr Cymru Welsh Water River Ebbw MALVERN TERRACE CSO 15 11 100
Dwr Cymru Welsh Water Rhynys Brook 4 Tredegar Terrace CSO 4 9 39
Dwr Cymru Welsh Water River Ebbw WVTS-North Celynen Colliery CSO 5 6 99.7
Dwr Cymru Welsh Water River Bargoed 63 Bedwellty Rd CSO 15 4 96.8
Dwr Cymru Welsh Water River Ebbw R/O Cobden St CSO, Crosskeys 1 3 100
Dwr Cymru Welsh Water River Ebbw WVTS - NEWBRIDGE CSO CAERPHILLY 6 1 100
Dwr Cymru Welsh Water River Sirhowy Islwyn Rd CSO, Crosskeys 6 1 94.9
Dwr Cymru Welsh Water Rhynys Brook Rifleman St CSO, Risca 6 1 98.2
Dwr Cymru Welsh Water River Rhymney CSO at Trelyn Park 1 0 99.9
Dwr Cymru Welsh Water River Rhymney Rear of Williams St CSO 1 0 100
Dwr Cymru Welsh Water River Sirhowy CSO at Hollybush - Ancient Druid 0 0 0
Dwr Cymru Welsh Water River Sirhowy Blackwood 100 Steps CSO 0 0 0
Dwr Cymru Welsh Water River Rhymney Aberbargoed CSO 0 0 100
Dwr Cymru Welsh Water Rhymney Bargoed Colliery CSO 0 0 100
Dwr Cymru Welsh Water River Sirhowy Railway Cottages CSO, Cwmfelinfach 0 0 100
Dwr Cymru Welsh Water River Rhymney OLD PRINCE ALBERT HOTEL HENGOED 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.