assured water supply; building permits

SB 1599 requires developers to prove water supply availability before selling land or obtaining building permits for new residential, commercial, or industrial projects in Arizona's designated water-stressed areas. It mandates a "certificate of assured water supply" from the state or a written commitment from a designated city, town, or private water company for subdivision plats and building permits. Cities, towns, and counties must verify this documentation before approving plats or permits, and the state will designate qualifying water providers. Exemptions apply for mineral extraction projects, and the bill offers water demand reductions for developments using approved gray water systems. This directly affects developers, local governments, and water providers in active management areas.