Pharmaceuticals in our drinking water. While Grumbles [assistant administrator for water at the U.S. Environmental Protection Agency] said the EPA had analyzed 287 pharmaceuticals for possible inclusion on a draft list of candidates for regulation under the Safe Drinking Water Act, he said only one, nitroglycerin, was on the list. Nitroglycerin can be used as a drug for heart problems, but the key reason it's being considered is its widespread use in making explosives. →[More:] My favorite comment: "I would actually like to know how much water one would have to filter to get enough nitro to even blow your nose."