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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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water quality

The Health of Our Rivers: Evidence from the Ock, Thames, and Tributaries

Join us for a community gathering to share and discuss the results of nine months of citizen science water quality testing across the Ock catchment…

Enfield Council and Thames21 launch major river restoration project

Date of release: June 22 Residents in Enfield are being given the chance to tackle river pollution and the effects of climate change as part…

Published 22nd June 202110th July 2021 Published in Latest news, Media Releases

New scheme launches to rewild Thamesmead’s canals: prizes to be won

Date of release: 1 February 2018 Thamesmead residents are being given the chance to create five new green nature spots along the area’s canals. Approximately…

Published 1st February 20188th June 2018 Published in Media Releases
Mural celebrates new rain gardens in Enfield which cut flood risk

Mural celebrates new rain gardens in Enfield which cut flood risk

A series of five rain gardens have opened on Alma Road in Enfield. To celebrate, we’ve linked up with the local community and Enfield Council…

Published 29th July 20161st August 2016 Published in Latest news
Food wrappers – the hidden microplastic!

Food wrappers – the hidden microplastic!

Sewage, microplastics and food packaging are among the top culprits impacting the Thames according to new findings from our Thames River Watch. Thanks to this new…

Published 13th July 201621st July 2016 Published in Latest news

Why are wetlands so important?

By Joanna Barton – Assistant River Cray Project Officer at Thames21 As an island nation with a wealth of rivers, canals and streams snaking through…

Published 29th January 201629th September 2017 Published in Blog
River Lea water testing

River Lea water testing

We’ve now finished analysing the water samples taken on the main tributaries of the Lea – Salmons Brook, Pymmes Brook, the Moselle, Dagenham Brook, Cobbins…

Published 8th December 201130th April 2013 Published in Latest news, Love the Lea

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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