Obviously, you haven't been out in some 3rd world countries.
As for being in the sun too long, ask the US government (FEMA to be exact) on why they didn't distribute 20,000 pallets of bottled water that was left sitting in the sun too long in Puerto Rico - 20,000 pallets of bottled water left untouched in storm-ravaged Puerto Rico.
Contrary to what you might believe, bottled water isn't pure nor is it free of contamination such as bacteria - How safe is bottled water?Ottmar Chavez, now administrator of Puerto Rico's General Services Administration, said FEMA reported that it had about 20,000 pallets of bottled water in excess in May this year, before Chavez was appointed.
His agency claimed the water, intending to deliver it where it was needed.
But after about 700 pallets had been distributed, complaints began to come in about the water's foul smell and taste, Chavez said in a statement.
According to CBS News, there has been over 100 recalls of bottled water products - Bottled Water: 10 Shockers "They" Don't Want You to KnowA report by the NRDC about 15 years ago — the latest large-scale study performed — tested more than 1,000 bottles from 103 brands of water by three independent labs. They found that about one-third of the bottles contained significant contamination with levels of chemical or bacterial contaminants exceeding those allowed under a state or industry standard or guideline in at least one test.
"The overall point was that people shouldn't assume that bottled water is any more safe or more clean or more pure than regular tap water," said Mae Wu, senior attorney in the health program at NRDC.
So, just because you "have never seen commercially sold bottled water that is "not dependable" doesn't mean that it doesn't happen. Remember that the above quote is from CBS so those recalls probably happened in the US or some other developed countries. There may not be such 'safeguards' in other parts of the world.Like any other products, water gets recalled, but more often than not you don't hear much about it.
There have been more than 100 recalls of contaminated bottled water, often months after the products were delivered to store shelves, says Dr. Gleick, who worries that the public rarely gets the memo.
What sorts of contaminants have been found in bottled water?
Benzene, mold, sodium hydroxide, kerosene, styrene, algae, yeast, tetrahydrofuran, sand, fecal coliform and other bacteria, elevated chlorine, glass particles, sanitizer, and crickets, says Gleick.