How is “waste” defined under Arizona water law?

Under Arizona water law, "waste" is defined as water use that is inefficient or not beneficial. This definition emphasizes the need for responsible water management, particularly in a state where water resources are scarce. The law recognizes that using water in a manner that fails to make effective use of it—such as allowing water to run off without use or utilizing excessive volumes for irrigation where such practices are unnecessary—constitutes waste.

The concept of beneficial use is central to water rights in Arizona; it implies that water should be used in a way that serves a purpose while minimizing wastefulness. Thus, any practice that leads to inefficiency or does not provide a clear benefit is seen as a misuse of the valuable water resource.