AZ HB2097

Amends Arizona law to allow counties and cities to impose fewer restrictions on gray water use, composting toilets, and gray water systems, limiting local regulations to requirements in state law and Department of Environmental Quality rules.

Requires the Department of Environmental Quality to adopt rules by June 1, 2026 allowing gray water use and composting toilets through general permits for single-family residences and residential rural land, with primary objective to maximize allowable gray water reuse including from kitchen sinks and dishwashers.

Exempts gray water systems and composting toilets complying with state standards from requiring building permits, and exempts property owners using only composting toilets and gray water on residential rural land from connecting to sewage systems.

Expands the definition of "gray water" to include wastewater from dishwashers and kitchen sinks without garbage disposals, and adds definition of "composting toilet" as an aerobic composting treatment system for waterless toilets.

Defines "residential rural land" as unincorporated county property on 2+ acres with residential zoning that is not adjacent to a city or town and establishes conditions for low-cost waterless composting toilet installations.