 The advisory is also in effect this morning for Reagan National Airport, Arlington National Cemetery and the Pentagon. People who live in the impacted areas are told to throw out any beverages and ice made after 9 p.m. Wednesday last night. You should also, they say, bring water to a rolling boil for at least one minute and let it cool before using it. Boiled water or bottled water should be used for drinking, brushing teeth, cooking food, washing food, making ice, washing dishes and preparing infant formula.