The Arizona Department of Water Resources (ADWR) is responsible for the regulation and the management of Arizona's water. The Arizona Department of Environmental Quality (ADEQ), meanwhile, monitors, reports, and protects Arizona's groundwater quality. Water quality information can be obtained from ADEQ's Water Quality Division website.
A map of the all of the Water Quality Assurance Revolving Fund (WQARF), Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA), and Department of Defense (DOD) contamination sites in Arizona can be found here. For the definitions of WQARF, CERCLA, and DOD contamination site, please visit the Wells Terminology page.
Visit the Arizona Department of Health Services (ADHS) website for information regarding testing the water quality of a private well. This information includes suggested testing schedules, a list of labs that test water quality, and helpful tips to protect your well from contamination.