Policymakers and advocates who work on water issues sometimes talk about “the costs of water.” The phrase can mean many, many things; this article focuses on a proposal to pipe water from the Colorado River to parts of Utah. This part of the United States, gripped by a historic drought, is having to consider difficult questions about water use, availability, benefits and costs of moving water from region to region. The rest of the country may well face some or all of these questions in the future also.