So in that link with the FAQ on FF it basically says if you have chloramines in your tap water to not bother with FF unless you can filter it out. I looked up what is needed to filter out the chloramines and well, that's just not going to happen.
They're going to be getting the city water for drinking, that's just the way it is going to have to be. Is it really pointless trying to FF with the city water? Will it 100% not work? I was really excited to FF with my new birds and the meat birds to keep poop smells down and keep my ladies healthy and happy.
Does your city use chloramines or chlorine? Chloramines can't be evaporated out and will kill off the good fermenting bacteria. Essentially the food could not ferment.