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
There is daily updated information on all constituencies covered by Thames Water
Here we can see a plot of the number of days across the Thames Water area that CSOs overflowed, correlated with the amount of local rainfall, as reported by the Environment Agency Rainfall Monitoring Stations.
We take the 75th percentile of all the rainfall monitoring stations in or near the constituency where the CSO is located, and plot that against how long each CSO overflowed.
Buckingham polluted for 1,931 hours, into Hardwick Brook
107 incidents
That's 2.68 months.
2.1 times a week, on average
Wokingham polluted for 1,641 hours, into Foudry Brook
84 incidents
That's 2.28 months.
1.6 times a week, on average
Witney polluted for 1,482 hours, into Limb Brook
74 incidents
That's 2.06 months.
1.4 times a week, on average
Buckingham polluted for 1,433 hours, into Rowsham Brook
89 incidents
That's 1.99 months.
1.7 times a week, on average
North East Hampshire polluted for 1,239 hours, into Sichester Brook
74 incidents
That's 1.72 months.
1.4 times a week, on average
Saffron Walden polluted for 1,234 hours, into Hatfield Heath Watercourse
70 incidents
That's 1.71 months.
1.3 times a week, on average
That's 4.28 months.
669 incidents
On average 1.8 times a day
That's 2.94 months.
163 incidents
3.1 times a week, on average
That's 2.68 months.
107 incidents
2.1 times a week, on average
That's 2.42 months.
143 incidents
2.8 times a week, on average
That's 2.39 months.
94 incidents
1.8 times a week, on average
That's 2.11 months.
98 incidents
1.9 times a week, on average
EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales
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.
Analysing sewage pollution by the Water Industry
With generous support from:
