In summary, your foggy water is 90% likely to be dissolved air throwing a tiny, invisible party. It will clear up on its own, leaving you with perfectly drinkable H₂O. The other 10% is sediment or minerals, which are gross-looking but not apocalyptic.
So next time your tap spits out a cloud, take a deep breath. Pour a glass. Wait two minutes. If it clears, drink up like the majestic, hydrated beast you are. And if it doesn’t? Maybe buy a filter—or embrace the fog. It’s not every day you get a glass of water that doubles as a science experiment.