This story was published in partnership with High Country News.
In early November, the U.S. Supreme Court agreed to hear a case brought by the Navajo Nation that could have far-reaching impacts on tribal water rights in the Colorado River Basin. In its suit, the Navajo Nation argues that the Department of Interior has a responsibility, grounded in treaty law, to protect future access to water from the Colorado River. Several states and water districts have filed petitions opposing the tribe, stating that the river is “already fully allocated.”
The case highlights a growing tension in the region: As water levels fall and states face cuts amid a two-decade-long megadrought, tribes are working to ensure their water rights are fully recognized and accessible.
On average, 15 million acre-feet of water used to flow through the Colorado River every year. For scale, one acre-foot of water could supply one to three households annually. A century ago, states reached an agreement to divide that water among themselves. But in re... Read more