Nearly all tribes in Arizona have a tougher time successfully negotiating rights to the state’s scarce water than other governmental entities. And the requirements necessary for tribes to reach water agreements is tougher in Arizona than in neighboring states. An investigative project by ProPublica and High Country News exposes the concessions tribes face to access water. The stakes are high. On the Navajo Nation, for instance, a nearly-completed medical complex sits empty because there is not enough water.