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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.

        • 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.

        • 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
          • Community Action for the Cut
          • Greenwich Natural Flood Management (NFM) Project
          • Marsh Dykes & Thamesmead Catchment Improvement Project
          • Oxford Rivers Project
          • Quaggy Habitats – Capel Manor Project
          • Queensmead Recreation Ground, London Borough of Bromley
          • Rewilding the Rom
          • River Beck Restoration
          • River Biodiversity Net Gain Units
          • Road run-off
          • South Essex Catchment Partnership
          • The River Ravensbourne and Glassmill Pond
        • 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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Marine Conservation Society

Single-use items to blame for majority of Thames pollution

More than 60% of litter would disappear from the Thames Basin if we moved away from single-use. That’s the claim from Thames21 and the Marine…

Published 22nd February 201922nd February 2019 Published in Latest news, Thames 21

Thames21 welcomes potential ban on cotton buds, plastic straws and other disposables

Plastic straws, cotton buds and other disposables could be banned from sale in England under plans set out by Theresa May this week. A consultation…

Published 20th April 201820th April 2018 Published in Latest news

Great River Rescue launched on Isle of Dogs – now register your event for October!

Volunteers cleared litter from Millwall Draw Dock on the Isle of Dogs on World Rivers Day on Sunday to launch the Great River Rescue campaign….

Published 25th September 2017 Published in Latest news

The Great River Rescue is coming – and you’re invited!

Register to clean up your local river in October’s country-wide clean-up of our rivers Date of release: August 30, 2017   The public is invited…

Published 30th August 201716th October 2017 Published in Media Releases

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

Volunteer urges Thurrock Council to “take lead” in keeping litter out of Thames

A volunteer has written to Thurrock Council to urge them to “take a lead” in the fight to keep litter out of the river and…

Published 15th December 201619th December 2016 Published in Blog
Plastic bag charge and beach litter: Thames21 open letter

Plastic bag charge and beach litter: Thames21 open letter

Here is Thames21’s open letter in response to last week’s story about the reported reduction in plastic bag litter following the plastic bag charge. Thames21…

Published 28th November 20162nd December 2016 Published in Latest news, Thames River Watch

Latest News

  • London Rivers Week 2026 Photography Competition
    To mark London Rivers Week 2026, Thames21 is launching a photography competition celebrating the vital role that rivers play in the life of our city. The competition aims to highlight...
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    Thames21
    THAMES21

    Address

    Main Office location (& deliveries)

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

    Postal Address

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

    Contact us

    Satellite Office

    Satellite Office: 

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

    Contact us


    Registered Charity number: 1103997

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