by Kristine Uhlman, Channah Rock, Janick Artiola, College of Agriculture and Life Sciences, Cooperative Extension, The University of Arizona
If you own a well in Arizona, you have the sole responsibility for checking to see if your drinking water is contaminated. Arizona state law does not require private well owners to test or treat their water for purity.
The most common contaminants found in Arizona groundwater in concentrations above health-based drinking water standards are arsenic, fluoride, radioactive elements (responsible for gross alpha radiation), and nitrate. Nitrate contamination, although it can be natural, is usually due to either agricultural practices (excessive fertilizer use and/or poor irrigation practices), or failing septic systems that allow contaminated waters to drain into the aquifer.
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