The bottle-versus-the-tap debate - Sickness in a bottle

"But a four-year study by the Natural Resources Defense Council, an environmental advocacy group, found major regulatory gaps. By the group's calculation, 60% to 70% of the bottled water sold in the United States — including carbonated water, seltzer, club soda, tonic water as well as flavored and fortified waters — is exempt from FDA bottled water standards. "