2023 Tier 2a Shortage

Space View photo of the Lake Mead area from NASA
February 3, 2022

The U.S. Secretary of the Interior has declared a Tier 2a shortage for Colorado River operations in 2023. This Tier 2a shortage will result in a substantial cut to Arizona’s share of the Colorado River — about 37% of Central Arizona Project’s normal supply; approximately 21% of Arizona’s total Colorado River supply. As a result of these reductions, the AWBA will have a Tribal firming obligation as identified in the Arizona Water Settlement Act.

Photo credit: NASA