Important water harvesting resources, information and principles information: http://www.harvestingrainwater.com/rainwater-harvesting-inforesources
Greywater harvesting information: http://www.harvestingrainwater.com/greywater-harvesting
Condensate harvesting information: http://www.harvestingrainwater.com/condensate-harvesting
Information from the City of Tucson's grey water harvesting rebate program: http://www.tucsonaz.gov/water/gray-water and http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/COT_Residential%20Grey%20Water%20Information%20Guide.pdf