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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
  • News
  • London Rivers Week
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        • Corporate Team Days
        • Get Trained
        • London Rivers Week 2026 Photography Competition
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Thames Water

Wetland project we worked on celebrated in international documentary

Firs Farm wetland in Enfield is the focus of a documentary investigating how cities are tackling the issue of flooding worldwide.  The PBS series, Sinking…

Published 17th January 201924th January 2019 Published in Latest news, Thames 21

Londoners urged to take back their rivers during London Rivers Week 2018

‘Massively increased opportunities’ for Londoners to explore and protect their rivers through collecting key data and joining clean up events Saturday 23 JUNE – Sunday…

Published 18th June 201818th June 2018 Published in Media Releases, Thames 21

Faulty drains threaten Thames water quality

Date of Release: Wednesday 6 December 2017 Londoners urged to check plumbing as signs of contamination found in almost one-third of outfalls across capital Raw…

Published 6th December 2017 Published in Media Releases
The group who trained for the Ravensbourne Outfall Safaris

Pollution and grumpy golfers: Adventures of the 2017 Ravensbourne Outfall Safari

Outfall Safaris, carried out by volunteers,  are a scheme to identify pollution in rivers caused when property drains are misconnected or cross connected. Here, Lawrence…

Published 21st November 2017 Published in Blog

Waterways Charity Thames21 Recruits Industry Heavyweights to Board

Date of Release: July 7, 2017 Martin Baggs and Peter Gerstrom appointed as Trustees Martin  Baggs, former CEO of Thames Water, and Peter Gerstrom, former…

Published 7th August 201716th October 2017 Published in Media Releases

Volunteer for new Outfall Safaris on the Ravensbourne & Ingrebourne

Would you like to help identify where misconnected drains are polluting rivers? Thames21, under the guidance of the Zoological Society of London, is offering the public the chance to…

Published 26th July 201716th October 2017 Published in Latest news

Huge new green space for Harrow: Stanmore Marsh Wetlands officially opens after restoration

Free fun community activities on June 28 as part of London Rivers Week Date of release: June 16 EVENT DATE: Wednesday June 28 2pm-3.30pm Stanmore…

Published 19th June 20178th June 2018 Published in Media Releases

Outfall safaris are tackling river pollution – and you can help as a citizen scientist!

Joe Pecorelli, the Zoological Society of London’s Europe Conservation Project Manager, tells us about work running across the capital to prioritise and map sources of…

Published 2nd May 201713th January 2022 Published in Blog

A new reedbed in your community – your vote counts!

Date of release: Monday February 6, 2017 Thames21, London’s leading waterways charity, is asking the public to choose the location of five new reedbeds for…

Published 6th February 2017 Published in Media Releases

Special spring 2-for-1 offer for schools at Welsh Harp

For a limited time and working in partnership with Thames Water, Thames21 is offering schools a 2-for-1 day of Key Stage 2 sessions at the Welsh…

Published 21st December 201629th September 2017 Published in Latest news

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 the beauty, diversity, and importance of London’s waterways, as well as the people...

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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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