For What its worth Chlorine leaves the water once its sets for 24 hours. I used to keep aquariums and when I started a new aquarium I would fill it and let it set with the bubbler on before putting in the starter fish.
So putting it in a bucket to make FF should be the same deal.
deb
Chlorine does, but chloramine doesn't. My county treats the water with chloramine which is a chlorine/ammonia bond that has to be broken before the chlorine can vent off.
Most cities have gone to chloramine since it is more stable and effective. You can let it sit and it will still be in there days later.
This is info from the San Francisco water department.
"Chloramine is not a persistent disinfectant and decomposes easily from a chemistry point of view (Valentine
et al, 1998) but for water supply purposes chloramine is stable and it takes days to dissipate in the absence of
substances exerting chloramine demand (Wilczak et al., 2003b). Therefore, it is not practical to remove
chloramine by letting an open container of water stand because it may take days for chloramine to dissipate.
However, chloramine is very easily and almost instantaneously removed by preparing a cup of tea or coffee,
preparing food (e.g., making a soup with a chicken stock). Adding fruit to a water pitcher (e.g., slicing peeled
orange into a 1-gal water pitcher) will neutralize chloramine within 30 minutes. If desired, chloramine and
ammonia can be completely removed from the water by boiling; however, it will take 20 minutes of gentle
boil to do that. Just a short boil of water to prepare tea or coffee removed about 30% of chloramine.... If
desired, both chlorine and chloramine can be removed for drinking water purposes by an activated carbon
filter point of use device that can be installed on a kitchen faucet. If desired, both chlorine and chloramine can
be removed for bathing purposes by dissolving Vitamin C in the bath water (1000 mg Vitamin C tablet will
neutralize chloramine in an average bathtub)"
http://sfwater.org/Files/FAQs/removal.pdf
One thing for certain is that chloramine kills bacteria in our tap water, so it will also injure cultures which we use to ferment
(yeasts, lacto-bacilli and kombucha cultures all). So to be safe, any time I add pro-biotics or ferment, I de-chlorinate first.