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Frequently asked questions

Information about specific sites

We're making improvements at over 250 of our sites. This will help to significantly reduce the need for sewage discharges into rivers, as well as improve the quality of the treated effluent being returned to the river.

Information about monitors

Why do some monitors appear offline? Is the map real time? We answer your questions about our monitors and what we're doing with their data.

Information about storm discharge

Why is there discharge when it hasn't been raining? Is it safe to swim in rivers? Find out how storm discharge impacts you and the environment.

Data quality incidents

A list of known issues with the quality of our storm discharge data including dates, impact and fixes.

Get in touch

If you can't find the answer to your question, let us know using our EDM query form.

Thames Water employee on the phone to a customer