Arizona Department of Water Resources mission is to ensure a long-term, sufficient, and secure water supply for the State. The site offers numerous water efficiency resources and information for Arizona businesses and residents.
United States Environmental Protection Agency
The Environmental Protection Agency has primary jurisdiction over water quality. This site provides information on groundwater, drinking water, and water science.
Arizona Department of Environmental Quality (ADEQ)
ADEQ provides links to reports on water management in Arizona and water quality.