There are two Artesian Well locations, south east of the Desert, introduced in the update on April 26, 2013. They can be upgraded three levels, all granting a higher increase to the Population Cap and a total of 3,500 resources.
A total of 170 assets are needed to complete construction of the Artesian Well. This is equivalent to 170 if one were to buy every asset instead of waiting to receive them from neighbors.
These sites are one of two resource building types that are built in the center of the desert. The other being the Gas Power Plant.