Water on Mars can be processed with Moisture Vaporators or harvested from subsurface permafrost deposits via Water Extractors. It is distributed via a pipe network, which it shares with the distribution of oxygen.
The most important ingredient for life to exist is by no means scarce on Mars. However, it is mostly frozen and underground, making it difficult for acquiring. As bringing the water needed to sustain a city on Mars back from Earth is a huge burden on every craft and far from efficient, constructing a steady water supply solely by harnessing water ice found on Mars is absolutely essential for the survival of any colony.
The following buildings consume water.
|Fungal Farm||Life Support||0.50|
|Hydroponic Farm||Life Support||Variable|
|Hanging Gardens||Dome Spires||2|