To answer the direct question, I would never drink anything that wasn't from the tap. That includes avoiding bottled water and water that goes through my RO/DI system.
The reasoning is simple: bottled water is roughly one thousand times more expensive than municipal-treated water, and it isn't well regulated. Not only is bottled water not tested nor regulated as thoroughly as municipal water systems, it can and does absorb significant quantities of contaminants from the actual bottle. From the standpoint of "environmentally friendly", it's a disaster.
I don't drink municipal tap water that's been processed through my RODI unit because there is a potential (a high potential) that it can be contaminated with bacteria that can make someone very ill. That doesn't mean that it is contaminated, just that it could, and I don't do the sort of tests on it that would be required to ensure safety (fecal coliforms would be one such test).
Municipal systems put chlorine or chloramine in water for a reason, and it's not just for the sterility/safety of the water when it's in the city's pipes. It's also intended to keep your home plumbing from becoming contaminated and making you ill.