Do you have any idea what that would cost... it's just not done.
They run wells and natural water sources.
Washing foods for packaging is a different story.
Fluoride is pretty easy to avoid IMO (as is bromine)... I don't eat packaged products.
The fluoride in fruits/veg is from natural calcium fluoride and not a concern IMO.
Wash it before consuming to remove any fluoride from processing/packaging.
Have a whole house water filtration system inf you live in the city... I have one.
I'd only add one word...
real research along with informed n=1 experiments