Thames Unfiltered podcast

Exploring river health and the future of the River Thames

What does a clean river really mean? Who is responsible for river health? And what does the future of the River Thames look like for the millions of people who rely on it?

Thames Unfiltered brings together scientists, campaigners, policymakers, river users and Thames Water colleagues to explore the challenges, debates and opportunities shaping one of the UK's most iconic rivers. Through a range of perspectives, we discuss river health, water quality and the role the Thames has played in London's past, present and future.

Whether you live, work or spend time around the river, each episode explores the issues affecting the Thames today and asks one important question: how clean is our river, really?

Listen on Spotify

Latest episodes

Explore conversations about river health, water quality, storm overflows and the future of the River Thames. Each episode includes a summary, key takeaways and a transcript.

Episode 1: How Healthy is the Thames?

27 minutes

From climate change to population growth, discover what's shaping the health of the River Thames today and the challenges it faces tomorrow.

Episode 2: What Does Clean Really Mean?

26 minutes

A river can look clean, but what does that really mean? Explore how scientists, environmental groups and campaigners measure river health.

Episode 3: The Victorian Sewer That Built Modern London

21 minutes

Step beneath the streets of London and uncover the remarkable Victorian engineering that still helps keep the city running today. 

Episode 4: Inside London's Super Sewer

20 minutes

Take a look inside the Tideway Tunnel and learn how this major infrastructure project is helping protect the Thames from sewage pollution.

Episode 5: Thames Water in the Hot Seat

22 minutes

Bills, pollution, investment and public trust. Hear some of the biggest questions facing Thames Water and the answers behind the headlines.

Episode 6: The Future of the Thames

22 minutes

What will the Thames look like in the years ahead? Explore the challenges and opportunities that could shape the future of London's river for generations to come.

Continue exploring

Learn more about the topics discussed in the podcast and the work being done to improve the health of the River Thames.
A sun lit river with a long grass bank and trees in the distance with a blue sky and a few white clouds

River health

Find out how river health is measured, the challenges facing our rivers, and the actions being taken to improve them.
Aerial picture of Esher STW and the River Mole

Storm discharge and event duration monitoring

Understand what storm overflows are, how they are monitored and why they operate during periods of heavy rainfall.