Arizona - Stronger Together
The Colorado River Basin continues to experience drought and the impacts of hotter and drier conditions. Based on the Jan. 1 projected level of Lake Mead at 1,065.85 feet above sea level, the U.S. Secretary of the Interior has declared the first-ever Tier 1 shortage for Colorado River operations in 2022. This Tier 1 shortage will result in a substantial cut to Arizona’s share of the Colorado River — about 30% of Central Arizona Project’s normal supply; nearly 18% of Arizona’s total Colorado River supply; and less than 8% of Arizona’s total water use. Nearly all the reductions within Arizona will be borne by Central Arizona Project (CAP) water users. In 2022, reductions will be determined by the CAP priority system – the result will be less available Colorado River water for central Arizona agricultural users.
Joint ADWR/CAP press release regarding the U.S. Secretary of the Interior’s declaration of a Tier 1 shortage on the Colorado River for 2022
2022 Tier 1 Colorado River shortage fact sheet
Lake Mead August 2021 24-Month Study infographic
Colorado River shortage will have various impacts on available water supply to CAP water users.
- Arizona heads into Tier 1 Colorado River Shortage for 2022
- Why do water managers pay such close attention to the 24-Month Study?
- CAP Priority System
- Lake Mead – 2021 Tier Zero Operations
- Hydrologic Modeling
- Lake Mead/Lake Powell Operations – Conjunctive Management
- August 2020 24-Month Study
- Colorado River Basin Climate and Hydrology State of the Science Report
- Lake Mead – 2020 Tier Zero Operations