Water is a precious resource in Arizona, and many people use groundwater for their homes, businesses and fields. New research from Arizona State University shows that water is now being used faster than it can naturally refill. “There is not something to be very scared about,” said lead researcher Karem Abdelmohsen. He analyzed data from a NASA satellite that can measure the amount of groundwater in an area and found that groundwater use in Arizona has tripled in the past 10 years.