This primer discusses the impacts of Colorado River shortages on tap water supplies in Central Arizona to assist stakeholders in assessing measures to adapt to those shortages.
Municipal Water
Municipal water is the water supplied by cities, towns and private water companies for residential, business and public use, including drinking, cooking, bathing, firefighting, and irrigation of parks and medians. The water supplies municipal providers rely on vary from provider to provider.
For over three decades, rigorous groundwater management combined with regulations requiring renewable water supplies for growth have helped ensure water resilience for Greater Phoenix. As the region confronts new water supply challenges, continuing groundwater protection may require changes to the rules for managing groundwater in the Phoenix Active Management Area.
Within the state's Active Management Areas, cities, Tribes and other entities can accrue long term storage credits for groundwater stored in the aquifers. This tool provides details about each long term storage credit account -- how much water and where it is stored -- potentially facilitating exchanges of groundwater supplies among account holders.
Many cities, Tribes and industries in Maricopa, Pinal and Pima Counties use Colorado River water delivered via the Central Arizona Project canal. These water users face a likelihood of cuts to their Colorado River supplies, but the extent of cuts to any particular user varies depending on the priority pools to which they have access. This tool shows how each of these users' access to Colorado River water will be impacted by future cuts.