How does each water company compare? These are the totals by company for each. The totals are really high, counting things in hours doesn't make it very easy to think about. Here we show how many years of continuous sewage dumps happened in a single year, by water company.
It isn't like there are just a few outliers... the problem exists across the entire estate of water assets. Here we show a 'cumulative frequency diagram' - where the number of CSOs that dumped sewage for a time, or longer, is shown. You can see that many CSOs dumped sewage into a river for months and months.
Dwr Cymru Welsh Water is highlighted in the plot below
Montgomeryshire polluted for 5,811 hours, into River Laen
291 incidents
That's 8.07 months.
5.6 times a week, on average
Monmouth polluted for 5,755 hours, into Mounton Brook
262 incidents
That's 7.99 months.
5 times a week, on average
Ogmore polluted for 5,344 hours, into River Garw
271 incidents
That's 7.42 months.
5.2 times a week, on average
Ceredigion polluted for 5,012 hours, into Nant Cledlyn
353 incidents
That's 6.96 months.
6.8 times a week, on average
Dwyfor Meirionnydd polluted for 4,697 hours, into River Erch
238 incidents
That's 6.52 months.
4.6 times a week, on average
Aberconwy polluted for 4,677 hours, into River Llugwy
237 incidents
That's 6.5 months.
4.6 times a week, on average
That's 3.28 years!
2,579 incidents
On average 7.1 times a day
That's 2.64 years!
2,592 incidents
On average 7.1 times a day
That's 1.79 years!
1,864 incidents
On average 5.1 times a day
That's 1.6 years!
2,024 incidents
On average 5.5 times a day
That's 1.57 years!
854 incidents
On average 2.3 times a day
That's 1.52 years!
1,494 incidents
On average 4.1 times a day
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.
