LOL, chlorine in the amounts used for water purification is nontoxic (though annoying). A gulp of even swimming pool water is harmless.
A big enough dose of ammonia or related compounds could create chloramines when the chlorine is added for disinfection.
Getting a goodly size home charcoal filter might be smart.
I certainly hope you run it through a Brita, Romulus. (Or, then again, given your "sweet-smelling" dogs, perhaps yours IS an entirely different Mississippi River than mine!)
My dream filter: Katadyn.
I figure I might end up with CLEAR water with one of those things.