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Student Project: Interstate Water Compacts: Arizona

This research guide explores Interstate Water Compacts in the United States at both the federal and state levels. Specifically, it will explore the law of California, Arizona and Colorado.

Background on Interstate Water Compacts in Arizona

Arizona is a party to two interstate water compacts; the Colorado River Compact of 1922 and the Upper Colorado River Basin Compact of 1948.  Arizona and California have a bit of an adversarial stand with respect to water and the Colorado River Compact. California has a more senior water right priority to Arizona with respect to the Colorado River Compact. This adversarial positioning has led to litigation between the two states. With water becoming more scarce in the Western states due to climate change and drought, it can be anticipated that more litigation between the two states will arise. 

Cases and Laws Related to the Colorado River Compact

The Colorado River

Arizona Statutes

Arizona Administrative Decisions

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