Here are the ones that have been overflowing for the longest, without interruption
Richmond Park into Beverley Brook
Started 8 months ago
Bicester and Woodstock into Oxon Ray
Started 7 months ago
South Cotswolds into River Coln
Started 1 month ago
South Cotswolds into Shorncote Ditch
Started 1 month ago
Leyton and Wanstead into River Roding
Started 2 weeks ago
We have live data for Thames Water so we can track what happens every day - given that overflows are supposed to happen on an 'exceptional' basis only - does the chart indicate that?
The red line indicates the number of CSOs that overflowed for at least 30mins, the grey, the number of CSOs that were offline for at least 30mins, and the blue line is the total number of CSOs that we can get information for.
There is daily updated information on all constituencies covered by Thames Water
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.
Thames Water is highlighted in the plot below
South Cotswolds polluted for 3,391 hours, into River Coln
162 incidents
That's 4.71 months.
3.1 times a week, on average
Reading West and Mid Berkshire polluted for 3,304 hours, into Foudry Brook
150 incidents
That's 4.59 months.
2.9 times a week, on average
Buckingham and Bletchley polluted for 3,166 hours, into Hardwick Brook
162 incidents
That's 4.4 months.
3.1 times a week, on average
Witney polluted for 3,156 hours, into Halfacre Brook
150 incidents
That's 4.38 months.
2.9 times a week, on average
South Cotswolds polluted for 2,870 hours, into Shorncote Ditch
165 incidents
That's 3.99 months.
3.2 times a week, on average
Reading West and Mid Berkshire polluted for 2,861 hours, into Clay Hill Brook
132 incidents
That's 3.97 months.
2.5 times a week, on average
That's 8.6 months.
1,094 incidents
On average 3 times a day
That's 7.68 months.
424 incidents
On average 1.2 times a day
That's 6.48 months.
298 incidents
5.7 times a week, on average
That's 5.27 months.
282 incidents
5.4 times a week, on average
That's 4.99 months.
174 incidents
3.3 times a week, on average
That's 4.99 months.
288 incidents
5.5 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
