During a multi-year study designed to establish a roadmap for developing sustainable water policies for the region, one of the recommendations was to take a hard look at data on residential water use and try to determine why this trend was occurring.
Just this past week, staff from Tucson Water and Pima County Flood Control released the results of that study in a data-intensive report that is available here (link will download the pdf file). This is an incredibly important report for future water planning efforts in this region. It's also applicable to many other regions, because the trend described above is not unique to Tucson - it's showing up all over the place.
I highly recommend checking out the report if this sort of thing appeals to you.
