If you’re drinking bottled water because you think it’s healthier, you may want to think again. While some brands are purer than others, bottled water can contain pollutants, often at higher levels than tap water, and is not tested as stringently as public water. Although the Food and Drug Administration (FDA) regulates bottled water, 60 percent to 70 percent of all brands are exempt from FDA scrutiny because manufacturers sell water in the same state they bottle it and the FDA governs only those products sold across state lines.
http://www.mensjournal.com/health-fitness/health/how-safe-is-your-drinking-water-20140710
having worked for a number of companies that applied plc’s to water systems, I can appreciate what you are doing/have done.