In the second episode of Thames Unfiltered, host Lucy Tobin asks the question:
What does clean really mean?
The River Thames is healthier than it was decades ago, with wildlife returning to parts of the river once declared biologically dead.
But beneath the surface, the picture is far more complicated.
In this episode, Lucy speaks to scientists, campaigners and conservationists about how river health is measured.
From real-time sewage maps and wet wipe pollution to seahorses, porpoises and harbour seals, we discover that a healthy Thames isn't necessarily a pristine one — it's a living, thriving ecosystem.
Listen to Thames Unfiltered, brought to you by The Standard, in association with Thames Water. All content has been created under The Standard's editorial control.
Next episode: We go inside Abbey Mills pumping station — London's historic \"Poo Palace\" — to explore the Victorian engineering miracle that transformed the capital and still carries its waste more than 150 years later.
We hope you enjoy this new series from The Standard. To listen to more episodes now, check out Thames Unfiltered.
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