On this day in 2003, Becker County residents raised concerns about naturally occurring arsenic in private wells as more homeowners began testing and treating their water. A test showed the Groths’ water contained arsenic at the level of 50 parts per billion. Many people around Long Lake and the Becker County area are rushing to get their water tested for arsenic, a highly poisonous chemical element. Deeper wells tested from 20 ppb to the low 40s ppb, with most averaging in the upper 20 ppb to low 30s ppb. “The deeper you go to drill, the more likely you are to get arsenic,” says Margaret Krueger of Krueger Water Wells in Audubon.