Thanks! You're right that I wasn't thinking about chlorine which does get added to the water where I live. I suppose that doesn't entirely kill all germs and pollution going into the water, but it helps getting rid of it.
Also, yeah. When I am out breathing pollution, it feels really bad for me
Ah, interesting. I should hope not all pollutants dissolve into water, but I wonder: wouldn't they still be bad when ingested even if not dissolved into water?