The rain that is falling today doesn’t end up in drinking water for a good while, depending on where you are. In the meantime it gets filtered by the soil it flows through.
On top of that not everything that’s unhealthy to breathe is unhealthy to eat/drink. Think about coal dust for example, very bad for your lungs but also a common medicine against diarrhea when compressed into a pill.
Just to give some perspective and lift you up a bit ;)

I’m guessing south east Asia
Not everything is in the us my friend

I think ebl supermarket has it, but yeah it’s a little hard to come by sadly

The really fancy stuff (in Germany, don’t know if it exists somewhere else) is Samba. Nutella is just sweet slime in comparison