What is the carbon footprint of 1 liter of water in the UK?

The carbon footprint of producing and supplying 1 liter of water in the UK is approximately 0.1 to 0.5 kilograms of CO2 equivalent. This footprint accounts for the energy used in extraction, treatment, and distribution processes. Factors such as the source of the water and the efficiency of the water supply system can influence this figure. Overall, while water itself has a low direct carbon footprint, the associated energy use contributes to its environmental impact.