Rainwater Harvesting: Harvesting rainwater reduces the use of drinking water for landscape irrigation. It is also an effective water conservation tool and proves more beneficial when coupled with the use of native, low water-use and desert-adapted plants. Additionally, rainwater is available free of charge and puts no added strain on the municipal supply or private wells.
Gray Water Harvesting: Gray water is defined as wastewater, collected separately from sewage flow that originates from a clothes washer, bathtub, shower or sink, but not from a kitchen sink, dishwasher or toilet. In general, gray water is an excellent source of water for household gardening, composting, and landscape irrigation. Gray water must be used so that it does not run off your own property.
Watershed Management Group develops community-based solutions to ensure the long-term prosperity of people and health of the environment with a focus on improving desert ecosystems. Among many other useful publications on their website regarding rainwater and gray water harvesting, the Field Guide for Rain Garden Care provides various strategies for creating backyard, commercial, and neighborhood rain gardens.
Harvesting Rainwater for Landscape Use provides information about planning and installing residential water harvesting systems. It includes information on calculating plant-water use requirements and historic rainfall for many Arizona cities and towns. Developed by the University of Arizona Pima County Cooperative Extension and ADWR, 2006.
Water Harvesting Guidance Manual provides basic information and design ideas for developments subject to the water harvesting requirements of the City of Tucson Land Use Code. This includes commercial sites, public buildings, subdivisions and public rights-of-way. The manual is also useful for homeowners.