De-icing agent is safe

Globe, Arizona Silver Belt: "Many have asked about residual film on the highway after storms pass. This residue is sodium chloride and other trace minerals left from our anti and de-icing treatments. This isn't wasteful because the film left on the roadway will begin working again as an anti-icing treatment when the next storm hits. ADOT has been very successful in efforts and have been able to keep the roadways wet and ice-free with temperatures as low as 18 degrees. This makes our roadways safer for drivers. It also enables ADOT to clear the ice and snow pack quicker by preventing the ice from bonding to the road during clean-up efforts. ADOT recommends drivers wash the undercarriage of their cars between storms. Good vehicle care can reduce or eliminate the impacts of the agents."