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River Ravensbourne

Chinbrook Meadows Maintenance Days

This is an event designed for the community to engage the local public with the river and not for corporates. If you are interested in…

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

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
Chris Stafford

Obituary: Thames21 marks the death of Chris Stafford, a long-term volunteer and friend

Chris Stafford 1957-2017 With the three-week 3 Rivers Clean Up beginning this weekend across the Ravensbourne, Pool and Quaggy, catchment partnership officer Lawrence Beale-Collins mourns a well known volunteer…

Published 31st May 201716th October 2017 Published in Latest news

Ninth annual 3 Rivers Clean Up to focus on plastic awareness as well as blitz on balsam

PRESS RELEASE Date of release: May 19 2017 The damage plastic is causing to the environment, particularly waterways, will be one of the themes of the…

Published 19th May 2017 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

Latest News

  • Hand wearing a blue glove holds a water sample positioned between two Hanna checkers in a nature background
    Water quality data collected by volunteers used to fix sewage pollution
    In 2024, volunteers from the River Ching Action Group discovered a massive spike in the concentration of ammonia during their regular water quality testing. They passed the data on to the Environment Agency and Thames Water, and...
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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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