On 22 January, the Upper VI IB Environmental Systems and Societies (ESS) class welcomed a fascinating guest speaker, Nigel Baker, a citizen scientist from Caversham and volunteer for HoT (Henley on Thames) Water. Founded by David Wallace and Chris Szweda, HoT Water is a community-led citizen science group dedicated to monitoring E. coli pollution levels at various points along the River Thames near Henley.

Nigel explained how the group works alongside organisations such as Thames 21 and the Environment Agency, with funding from Henley-on-Thames Town Ccouncil, to collect vital data about river health and safety. E. coli is one of the most dangerous pathogens for humans, making this monitoring especially important. By sharing their results with a wide range of users, such as swimmers, rowers and paddleboarders, people can take action based on solid scientific evidence. The real-time results appear on Henley-on-Thames’ website: https://www.henleytowncouncil.gov.uk/services/water-testing/.

The visit gave students a valuable insight into how citizen science plays a crucial role in protecting the environment and public health. We are very grateful to Nigel Baker for sharing his expertise and experiences, and to Mrs Riches for organising such an informative event.

Written by the Upper VI ESS class