The Tucson Association of REALTORs® has a large building with a flat roof that is just begging for a water harvesting project. With the water gathered, it could water the current landscaping and could probably even sustain more desert landscaping as well. TFS, a local company says "By irrigating your landscape with collected rainwater you reduce your demand on municipal water and the associated chemicals and fossil fuels used in its transport and treatment." Which translates to big energy savings. TFS has come out to the site and has the cistern we would like to use.