In which year did the U.S. Supreme Court decide the Arizona v. California lawsuit?

The U.S. Supreme Court decided the Arizona v. California case in 1963. This landmark decision addressed the allocation of Colorado River water among several states, including California and Arizona. The ruling was significant as it established a framework for the equitable distribution of water resources, which is critical in the context of water scarcity and interstate water rights in the Southwest. By clarifying the rights of states to use the shared water, the Supreme Court's decision has had lasting implications for water policy and management in the region, making 1963 a pivotal year in the evolution of water law in the United States.