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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
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            • Leading Action for Healthy Rivers: Thames21’s flagship training course
            • Welsh Harp Environmental Education Centre
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pollution

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
people in canoes near a new reedbed

I built a reedbed!

By Guest Blogger Sheila Ozeer, Volunteer at Thames21 It was the event description that lured me in – it read: ‘Come down and help us…

Published 11th July 201629th September 2017 Published in Blog
River of Death, why fish died in the River Lea, and what can be done

River of Death, why fish died in the River Lea, and what can be done

Thousands of fish died in the River Lea last week after rain washed the accumulated pollution from East London’s roads into the river. The River Lea…

Published 27th July 201319th November 2015 Published in Blog, Latest news, Love the Lea, Sewage pollution, Sustainable drainage
Saving North East London’s rivers

Saving North East London’s rivers

These are exciting times for river friendly drainage. Our project to clean polluted water before it enters the Salmons Brook in Enfield is identifying sites,…

Published 2nd February 201330th April 2013 Published in Blog, Latest news, Love the Lea, Sewage pollution
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

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Latest News

  • Thames21’s response to Thames Water’s pollution incidents
    Recent figures published in The Times have shown that Thames Water was responsible for almost a third of the water sector’s most harmful pollution incidents in 2025. A Thames21 spokesman said: “The scale of serious pollution incidents linked to Thames Water is deeply...

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Thames21
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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,
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Navigation Road (off Gillender Street),
LONDON E3 3JY

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Registered Charity number: 1103997

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