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.
Yorkshire Water is highlighted in the plot below
Huddersfield polluted for 5,313 hours, into River Calder
467 incidents
That's 7.38 months.
On average 1.3 times a day
Thirsk and Malton polluted for 5,185 hours, into Cobshaw Dyke
259 incidents
That's 7.2 months.
5 times a week, on average
Selby polluted for 5,106 hours, into River Ouse
328 incidents
That's 7.09 months.
6.3 times a week, on average
Calder Valley polluted for 3,930 hours, into River Calder
282 incidents
That's 5.46 months.
5.4 times a week, on average
Keighley and Ilkley polluted for 3,862 hours, into River Aire
337 incidents
That's 5.36 months.
6.5 times a week, on average
Rawmarsh and Conisbrough polluted for 3,789 hours, into Unnamed Of Harley Dyke
198 incidents
That's 5.26 months.
3.8 times a week, on average
That's 3.79 years!
4,177 incidents
On average 11.4 times a day
That's 3.41 years!
4,888 incidents
On average 13.4 times a day
That's 3.17 years!
2,774 incidents
On average 7.6 times a day
That's 2.68 years!
2,456 incidents
On average 6.7 times a day
That's 2.12 years!
2,231 incidents
On average 6.1 times a day
That's 1.44 years!
1,082 incidents
On average 3 times a day
That's 5.42 months.
742 incidents
On average 2 times a day
That's 2.42 months.
151 incidents
2.9 times a week, on average
That's 1.79 months.
108 incidents
2.1 times a week, on average
That's 1.32 months.
109 incidents
2.1 times a week, on average
That's 22.88 days.
150 incidents
2.9 times a week, on average
That's 14.5 days.
154 incidents
3 times a week, on average
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org
