Water

Sufficient production of Water is critical for Colonists. Each consumes a set amount every day, and going thirsty for extended periods will result in Dehydration. This critical condition will quickly lead to death unless more wells are built.
 * A regular Water Well must be placed on normal or fertile soil.
 * A Bore Well does not have this restriction as it can pump water from deeper, provided you have Energy to power it. It also must be first unlocked from the tech tree.
 * Water Storages can help alleviate a situation where lots of new survivors join the colony and the demand for water ramps up.

Some of the buildings will also reserve a set amount of water for their own use, so be sure to have enough capacity before constructing them to avoid a situation where you have to choose between an operational building and the well-being of your colonists.