Public water resources consist of reservoirs, aquifers (which supply 40% of the Thames River Basin District and include the limestone of the Cotswolds) and the River Thames, which provides two thirds of London’s drinking water
Unsustainable abstraction leads to reduced flow and rivers drying up. This has a seriously damaging impact on the biodiversity. Trusts are lobbying water companies and raising awareness of the importance of water efficiency to the public.