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Achieving a carbon neutral Europe by 2050 without increasing the pressure on freshwater resources, would require a shift to a low carbon energy system considering not only the expected gains in CO₂ emissions, but also the water needs of the replacing energy technologies. Some low-carbon technologies could use water more intensively than the system they replace, such as biofuels, hydrogen, and Carbon Capture Sequestration systems (Hidalgo González et al., 2019). For example, according to the European Commission Long Term Strategy, hydrogen could account for up to 16-20 % of the total EU energy share, mostly in the residential and transport sectors, and could provide additional solutions for long-term energy storage. Supplying the equivalent of 1.6-2.3 TWh from hydrogen would consume around 30 % of the total water consumed in the energy sector today (Moya et al., 2020; Hidalgo González et al., 2019).