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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
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River Litter Detectives – Poplar Rowing Club

Come along and join Thames21 as a river citizen scientist on the River Thames. We will be collecting the litter we find and categorising it…

River Litter Detectives – Sands End

Come along and join Thames21 as a river citizen scientist on the River Thames. We will be collecting the litter we find and categorising it…

River Litter Detectives – Sands End

Come along and join Thames21 as a river citizen scientist on the River Thames. We will be collecting the litter we find and categorising it…

River Litter Detectives – Bishop’s Park

BOOK YOUR PLACE NOW Come along and join Thames21 as a river citizen scientist on the River Thames. We will collect the litter we find…

Sands End River Clean Up & Litter Detectives

Come along and join Thames21 as a river citizen scientist on the River Thames. We will be collecting the litter we find and categorising it…

PlasticsFuture 2023 Conference – Plastic Free Mersey Post-Event Recap

The Plastic Free Mersey team represented environmental charity Thames21 at the University of Portsmouth PlasticsFuture 2023 conference at the end of June, hosted by the…

Published 5th July 20237th July 2023 Published in Blog, Thames 21

Thames21 raises alarm about river sewage crisis

Thames21 helped raise the alarm about the UK’s river sewage pollution crisis last week – by contributing to a hard-hitting BBC documentary. Thames21 opened last…

Published 19th April 202119th April 2021 Published in Latest news, Thames 21

When jet lag helped save a cygnet

By Helen Stoddard – Thames21 Volunteer Helen Stoddard is part of Thames21’s citizen science army – a Thames River Watch volunteer. She recounts the time…

Published 25th August 202025th August 2020 Published in Blog

Hollywood star Zac Efron joins forces with Thames21 to highlight London’s plastic waste crisis

American actor and singer Zac Efron highlights the huge issue of London’s plastic waste problem as part of a new series on Netflix airing in…

Published 8th July 20206th February 2023 Published in Latest news

Coronavirus Plastic Pollution: what we can do about it

By Jo Pike – Communications Volunteer at Thames21 Jo Pike is our newest Thames21 volunteer, supporting the ever-busy comms department. She works part-time in a…

Published 30th June 202015th July 2020 Published in Blog

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Latest News

  • Thames21 reacts to Defra’s River Thames bathing water site news
    The Department for Environment, Food and Rural Affairs (Defra) has announced 13 new bathing water sites across England, including stretches of the River Thames at Ham and Kingston, and at Pangbourne Meadow in Berkshire. Congratulations to community group Teddington Bluetits, Simon Griffiths of...

Events Diary

Upcoming Events

May 19
11:30 am - 1:30 pm

River Litter Detectives – Sands End

Broomhouse Dock
Jun 18
11:00 am - 1:00 pm

River Litter Detectives – Poplar Rowing Club

Poplar, Blackwall & District Rowing Club
View Calendar

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Thames21
THAMES21

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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

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Satellite Office

Satellite Office: 

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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