AZ SB1639

Amends Arizona statutes to establish statewide requirements for adequate water supply evaluation for subdivisions outside active management areas, replacing prior exemptions and director discretion with mandatory water supply assessments.

Requires cities, towns, and counties to approve subdivision plats only if the director of water resources determines adequate water supply exists for 100 years or the developer obtains written commitment from a designated water provider with adequate supply.

Repeals sections 45-108.02 and 45-108.03, eliminating previous exemptions that allowed subdivisions with inadequate water supply if transported by motor vehicle or train under certain conditions.

Adds mandatory public notification and objection procedures for water supply applications, with administrative hearings available in contested cases, and establishes criteria for designating water providers as having adequate supply.

Modifies state real estate commissioner authority to deny public reports for subdivisions lacking adequate water supply, and restricts water supply development fund assistance to water providers in counties/cities adopting adequate water supply requirements or located in active management areas.