River health
We all want our rivers to be wonderful places. Running clear and teeming with life – natural beauty spots for people to relax and enjoy.
In reality, there are three main factors that threaten our vision for rivers. These are:
- Discharges from the water industry
- Agriculture and rural land management
- Urban and transport runoff
We want to be very clear on our stance. Putting untreated sewage into rivers is unacceptable to us, our customers and the environment. We're working hard to stop these discharges, with the help of the Government, Ofwat and the Environment Agency.
Storm discharge and rivers
Find out more about storm discharge and how it affects our rivers and water courses.
Storm discharge and EDM
Storm discharge is released by storm overflows into watercourses during heavy or continued rain to prevent sewer flooding. We use event duration monitoring (EDM) to record storm discharge activity.
Storm discharge map
Our near real-time map shows storm discharge activity, as indicated by our EDM monitors. You can use the map to see if overflows are currently discharging into a watercourse or the date and time of the last recorded discharge.
Storm discharge and flow data
We want to be open and transparent with our data. Access annual storm data discharge reports and total daily volume (TDV) flow data here. You can also use our third party API to integrate our data into your own applications.
Investing in river health
We’re fully committed to our future plan to reduce harm to river water. This includes only discharging high-quality treated effluent and using fewer storm overflows.
Frequently asked questions
Why are some monitors offline? What's the impact of storm discharge on our rivers? What are we doing about frequently discharging sites? You'll find lots of useful information on our FAQ page.
Get in touch
Do you have questions or concerns about storm discharges but can't find the answer online? You can contact us using our enquiry form.
We'll get back to you as soon as possible.
River health projects
We know we need to do a lot more to protect our much-loved rivers. That's why we're working hard to upgrade our network, to protect our rivers through a range of projects.
Thames Tideway Tunnel
The Thames Tideway Tunnel will help to reduce storm discharges in a typical year by 95%.
Water quality at Wolvercote Mill
We're investigating the water quality at Wolvercote Mill Stream to understand our impact on the condition of the bathing water.