Bottled water is a weird commodity.  Basically you are buying tap water from
some other city or State, but paying more for it than you pay for gasoline
for your car.  Depending on where the filling point for the bottled water is
as to whether or not it contains fluoride.  If you buy distilled water, it
should not contain any fluoride.  Be very critical of reading the labels of
these products.  Filtered could simply mean they ran the water through a
wire mesh screen.  Bottled near the source of XXYXX spring, can mean they
dispense water into these bottle from a tap near some unknown (and
un-mapped) spring.  If it actually comes out of a spring,,,,,,,,,,,,
remember that animals leave their "surprises" in open water all the time.
Underground springs will contain whatever runs off from the surface.

A valid argument against continuing to fluoridate water at the same level is
that people now end up getting fluoridated water in soda pop, bottled juice,
beer, water in cans of beans, corn, tuna, etc.  So, the need to supplement
fluoride in non-fluoridated communities *may* not be as critical and some
will argue that fluoride levels in drinking water could therefore be
reduced.  I am not aware of a major study looking at this issue from this
view-point.