What is a requirement for obtaining an assured water supply in Arizona?

To obtain an assured water supply in Arizona, one of the fundamental requirements is proof of adequate groundwater resources. This necessity arises from the state's commitment to ensuring that new developments have access to a reliable and sustainable water supply. Arizona operates under the Arizona Groundwater Management Act, which was established to manage and protect groundwater resources effectively.

By demonstrating the availability of sufficient groundwater resources, developers can affirm that their projects will not deplete public water supplies and can support long-term growth without negatively impacting existing water users. This requirement addresses concerns about over-extraction of water, especially in areas where water scarcity is a pressing issue. It is crucial for maintaining the balance between development and conservation of Arizona's limited water supply.

The other choices, while related to water use and management, do not serve as primary conditions for establishing an assured water supply. A written plan for water conservation and verification through comprehensive analysis may be aspects of overall water management practices, but they do not address the immediate need for proof of adequate water resources. Prior approval from environmental agencies typically pertains to different regulatory processes, not the assurance of water supply directly.