A Maricopa County judge has struck down a controversial water policy implemented under Governor Katie Hobbs’ administration, marking a significant setback for a rule that many builders and local officials blamed for worsening Arizona’s housing shortage.
The policy, known as the “unmet demand” model, changed how the Arizona Department of Water Resources evaluated groundwater availability for new developments in the Phoenix Active Management Area. ADWR argued the changes were necessary to protect Arizona’s long-term water supply. Developers, homebuilders, and several growing communities argued the policy would significantly restrict future housing construction.
Judge Scott Blaney ruled that ADWR exceeded its authority and failed to follow Arizona’s administrative rulemaking requirements when implementing the policy.
The ruling raises uncomfortable questions for an administration that has repeatedly made affordability a central message. Governor Katie Hobbs frequently identifies housing costs as a major challenge facing Arizona families. At the same time, her administration supported a policy that critics argued would reduce housing supply during an affordability crisis.
Arizona continues to face a significant housing shortage. According to the Common Sense Institute Arizona, the state remains tens of thousands of housing units short of current demand, placing continued pressure on home prices and rents.
Supporters viewed the rule as a necessary safeguard for Arizona’s water future. Critics argued that limiting new housing development would make affordability challenges worse by reducing the number of homes entering the market. Fewer homes entering the market often means higher prices for buyers and renters already struggling with rising costs.
The court’s decision does not eliminate Arizona’s water challenges, but it reinforces that state agencies must operate within the authority granted by law. As Arizona continues to grow, policymakers will need to balance responsible water management with the need for attainable housing.
