Gatoraide is full of phosphorous as well. For many people it's a non-issue, however if you have any sort of kidney issues that's a no-go. We've found that orange juice works wonders for my fiancée's cramps she sometimes gets with dialysis.
And you can taste it immediately if you've been abroad for any length of time and come back to the USA. Everything becomes overly sweet, overly salty in the USA when you've not had it in awhile. What we call "bread" in the USA is really more of a cake compared to bread abroad as well.
"I don't drink water. Fish F--- in it." -- WC Fields.
Actually, there's a real problem out there which hasn't been adequately addressed -- pharmaceutical metabolites. Prescription pills people take just don't end once you swallow them. Many continue to live on, in active form, even after excretion. Most wastewater treatment plants aren't designed to remove these, so they get dumped out into the environment. When you're getting measurable levels of pharmaceuticals in fish and frogs, there's a problem. Then you have situations where a town upstream is dumping their treated wastewater into a river or tributary and a town downstream gets their water from the same source. Or in more modern setups, utilities pumping partially treated sewage directly into aquifers. Those people downstream are now getting pharmaceuticals in their water.