Thames Water Utilities Ltd are responsible for water supply and sewerage within the Thames catchment area. A map also shows the various 'water only' companies operating within the Thames region. These include: Affinity Water Ltd (previously known as Veolia Water Central and, before that, Three Valleys Water), South East Water Ltd, Sutton & East Surrey Water plc).
See also the Greater London Authority's map of the Thames and other waterways within Greater London in their Blue Ribbon Network map (part of the 'London Plans' of 2004 and 2011).
For details of the nature conservancy designations for the Thames and other regions across Britain, see Natural England's interactive 'Nature on the Map' ('MAGIC').
It is possible to walk along course of the Thames for long stretches. For more details, see the Thames Path National Trail website.
The Thames Learning Group have created a map for learning centres across the Thames and Thames region. Click here for the Thames Learning Group map. (The Thames Learning Group is led by the River & Rowing Museum, Henley on Thames, and Thames Estuary Partnership).
The London Sound Survey website has a page devoted to London's Waterways, 'an auditory tribute to Harry Beck's Underground map', and a page for the Thames Estuary.