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Bill

Bill

SB 1521

unbuilt certificates; assured water supply

57th Legislature - First Regular Session Introduced by Tim Dunn

Arizona law now permits developers to use unbuilt water certificates to prove assured water supply for new construction, expediting development approvals in water-scarce regions.

Signed by Governor
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Bill Summary · SB 1521

Legislative bill overview

SB 1521 modifies Arizona's water supply certification requirements by allowing developers to use "unbuilt certificates" to demonstrate an assured water supply for new construction projects. The bill streamlines the process for proving long-term water availability without requiring completed water infrastructure, making it easier for developers to obtain permits for new residential and commercial developments.

Why is this important

Arizona faces significant growth pressures and water scarcity concerns, making water supply verification a critical regulatory hurdle. This change could accelerate development timelines and reduce project costs, but directly impacts how the state enforces water sustainability standards for new growth in an arid region with limited renewable water resources.

Potential points of contention

  • Water conservation vs. development: Critics may argue the change weakens protections against unsustainable growth in a drought-prone state by reducing scrutiny of actual water availability
  • Definition and accountability: Unclear standards for what constitutes an "unbuilt certificate" could create loopholes or disputes about whether claimed future water supplies are genuinely secure
  • Rural vs. urban impacts: The policy may disproportionately benefit developers in certain regions while potentially disadvantaging rural communities competing for limited water allocations

Compiled from official sources — confirm details with the bill’s official record.

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