Since 2000, there have been concerns about lead and radon in Portland Public School buildings. In 2016, an overly large amount of lead was found in two schools. All PPS schools were ordered to use bottled water for the rest of the year instead of drinking from water fountains, and to use bottled water for food preparation and dish washing as well. Controversy surrounding poorly and infrequently tested water for lead has led to Superintendent Carole Smith stepping down in July 2016, a year before her ten-year term ended. In August 2017, Guadalupe Guerrero became the new Superintendent.