On a recent walk along New York City’s Union Square Park, I came across a beautiful sight: walking in 95-degree humid heat, I saw fountains and fountains of cold, clean, and free drinking water. New Yorkers profess that their tap water is “the purest and tastiest” in the world. This summer, the New York Department of the Environment is rolling out an environmental education campaign on city streets to inform residents of just that–and to discourage people from buying bottled water.