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        • Empower communities to look after their local rivers:

          We mobilise thousands of volunteers every year, working along the riverbank to transform neglected rivers into areas that everyone can use and enjoy.

        • Restore the capital’s network of rivers through the power of nature

          We work to clean and green the capital’s 400-mile network of rivers through innovative solutions to boost biodiversity and restore nature.

        • Build a climate resilient London

          We help to build more engaged communities and healthier rivers better able to adapt to the impacts of climate change, now and into the future.

        • a group volunteers in waders walking through a shallow river on a sunny day using sticks to help them balance
        • Working together to improve our rivers

          We deliver a wide range of projects across London and the Thames Basin to restore, protect and improve our rivers for people and wildlife. Explore some of our key projects and programmes

        • Empower communities to look after their local rivers
          We mobilise thousands of volunteers every year, working along the riverbank to transform neglected rivers into areas that everyone can use and enjoy.

        • Restore the capital’s network of rivers through the power of nature
          We work to clean and green the capital’s 400-mile network of rivers through innovative solutions to boost biodiversity and restore nature.

        • Build a climate resilient London
          We help to build more engaged communities and healthier rivers better able to adapt to the impacts of climate change, now and into the future.

        • Working together to improve our rivers
          We deliver a wide range of projects across London and the Thames Basin to restore, protect and improve our rivers for people and wildlife. Explore some of our key projects and programmes.

        • Improving Rivers
          • Backwater restoration in the Maidenhead to Teddington catchment
          • Bathing waters – Reclaim Our Rivers
          • Cator Park, London Borough of Bromley
          • Understanding our rivers through connecting communities to waterways – Catchment Partnerships
          • Chinbrook Meadows Wetlands – PROJECT COMPLETED
          • Community Action for the Cut – PROJECT COMPLETED
          • Greenwich Natural Flood Management (NFM) Project
          • Marsh Dykes & Thamesmead Catchment Improvement Project
          • Oxford Rivers Project
          • Quaggy Habitats – Capel Manor Project – PROJECT COMPLETED
          • Queensmead Recreation Ground, London Borough of Bromley
          • Rewilding the Rom – PROJECT COMPLETED
          • River Beck Restoration
          • River Biodiversity Net Gain Units
          • Road run-off
          • South Essex Catchment Partnership
          • The River Ravensbourne and Glassmill Pond – PROJECT COMPLETED
        • Connecting Communities
          • Beckenham Place Park East – River Ravensbourne
          • Become a Citizen Scientist
          • Chestnuts Field
          • EMPOWER Rivers
          • Plasticblitz
          • Action for Silk Stream
          • Thames Connections
          • Thames River Watch
          • The Roding Rises
        • Education and Training
          • Citizen Science
            • Leading Action for Healthy Rivers: Thames21’s flagship training course
            • Welsh Harp Environmental Education Centre
        • What we do
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Thames21 welcomes Deposit Return System as it ‘will significantly help rivers’

Thames21 is delighted that Michael Gove, the Secretary of State for the Environment, has announced today that the Government plans to implement a deposit return…

Published 28th March 201829th March 2018 Published in Latest news

Thames21 helps measure and manage the impact of Boat Race on plastic litter

On Sunday March 25  Thames21 helped to measure and manage the impact of plastic litter in the Putney area of the Thames, in the wake…

Published 26th March 2018 Published in Latest news

Londoners rally to measure plastic’s hidden impact on the Thames

Thousands of wet wipes flushed down toilets are shedding plastic into the river and changing the shape of the riverbed    Date of release: Monday…

Published 26th February 201819th April 2018 Published in Media Releases

Plastic-free parenting hacks: wet wipes

By Karline McCawley – Education Officer at Thames21   Baby poo. It’s certainly not the most appealing subject, but did you know it’s connected to…

Published 31st January 201813th June 2018 Published in Blog

Thames21 Badged Group reports huge amounts of plastic litter in Thames Estuary

Thames21’s latest Badged Group has cleared unprecedented amounts of plastic from the north side of the Thames Estuary. Last weekend the newly-accredited group, based in…

Published 19th January 201820th January 2018 Published in Latest news

4,500 wet wipes found in one patch of Thames foreshore

Shock findings reveal that the Thames has the highest concentration of wet wipes ever recorded in Britain – with 277 found in just one square metre. Over 4,500…

Published 10th April 20176th February 2023 Published in Latest news

Wet wipes – the ongoing plastic battle

Our Thames River Watch project has started measuring the impact of wet wipes on the Thames for the first time – and found the highest concentration…

Published 7th April 201716th October 2017 Published in Blog

Thames21 data features on London TV as London Assembly investigates impact of plastic bottles

This Wednesday was an even busier one than usual for Thames21. We were interviewed by both London Live and BBC London about the huge problem…

Published 24th February 20178th June 2018 Published in Latest news

Plastic water bottles one of worst Thames polluters, says Thames River Watch report

As our report launched this week, Sky News’ Plastic Tide documentary and anti-waste campaigner Hugh Fearnley-Whittingstall echoed our calls  for a deposit return system Our…

Published 27th January 201713th January 2022 Published in Latest news, Waterways and Wellbeing

Seven Unexpected Things You Might Find in the Thames

Thames21 reconnects communities back to healthy rivers. River clean-ups are at the heart of what we do, alongside education, advocacy, research and river enhancement. We help remove…

Published 16th September 201610th January 2022 Published in Blog

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  • ‘First-of-its-kind’ citizen science study estimates 600 million litres of sewage-contaminated water enter Lower River Roding each year
    Around 600 million litres of sewage-contaminated water are estimated to enter the River Roding and its tributaries every year via unpermitted and previously unmonitored outfalls, according to a new citizen science study. This is equivalent to around 240 Olympic-sized swimming pools of polluted...

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Thames21
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Main Office location (& deliveries)

The City of London,
Guildhall,
Aldermanbury Street,
LONDON EC2V 7HH

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The City of London,
Guildhall,
PO Box 270,
LONDON EC2P 2EJ

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The Lock Office,
Bow Locks,
Navigation Road (off Gillender Street),
LONDON E3 3JY

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Registered Charity number: 1103997

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