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.
Southern Water is highlighted in the plot below
Chichester polluted for 6,542 hours, into River Lavant
286 incidents
That's 9.09 months.
5.5 times a week, on average
Romsey and Southampton North polluted for 4,995 hours, into River Test
239 incidents
That's 6.94 months.
4.6 times a week, on average
Lewes polluted for 4,830 hours, into Tidal River Ouse
243 incidents
That's 6.71 months.
4.7 times a week, on average
Romsey and Southampton North polluted for 4,160 hours, into River Blackwater
194 incidents
That's 5.78 months.
3.7 times a week, on average
Isle of Wight polluted for 4,000 hours, into English Channel
265 incidents
That's 5.56 months.
5.1 times a week, on average
Chichester polluted for 3,939 hours, into Chichester Harbour
227 incidents
That's 5.47 months.
4.4 times a week, on average
That's 1.96 years!
1,550 incidents
On average 4.2 times a day
That's 1.82 years!
1,237 incidents
On average 3.4 times a day
That's 1.59 years!
1,957 incidents
On average 5.4 times a day
That's 11.81 months.
497 incidents
On average 1.4 times a day
That's 9.49 months.
366 incidents
On average 1 times a day
That's 9.09 months.
423 incidents
On average 1.2 times a day
That's 7.44 months.
649 incidents
On average 1.8 times a day
That's 5.56 months.
265 incidents
5.1 times a week, on average
That's 4.84 months.
164 incidents
3.2 times a week, on average
That's 4.31 months.
173 incidents
3.3 times a week, on average
That's 4 months.
237 incidents
4.6 times a week, on average
That's 3.42 months.
281 incidents
5.4 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.
