In a rapidly growing desert metropolis such as Phoenix, the question of which water conservation measures and factors actually save water and which do not is an obviously important one. The water-related decisions made today and in the years to come will have lasting impact on the future of this area, including upon its sustainability. Estimates from the City of Phoenix suggest that, in non-SRP-areas, water demand will exceed water supply by the year 2025--absent droughts or intervention.

This report documents and analyzes the results of a multivariate regression analysis designed to estimate the effects on residential, single-family water consumption of a host of factors, particularly water conservation policies.

The report includes original articles by Arizona policy practitioners and observers, reprints of pertinent articles by experts beyond Arizona, and a list for further reading. Articles of varying lengths and complexities are purposefully included so as to offer something to readers with different levels of interest in and knowledge of the subject matter.

Despite several early attempts in the Arizona Legislature to modify the framework for where the newly-passed Proposition 200 money would go, the four accounts established in the original voter-approved Tobacco Tax and Health Care Act have been maintained as intended since 1995. However, large sums of Proposition 200 revenue – on average $90 million annually – have gone unallocated and unspent by the Legislature.