Chloramine is not used in the Melbourne water supply (OP is from
Melbourne). In John's case, letting the water stand O/N is an
appropriate method of removing chlorine.

Eric Hunt wrote:
Letting water stand overnight to evaporate the chlorine only works with
water that's been sanitized using chlorine gas.

Many water systems are coverting to a more stable form of chlorine,
chloramine. It never evaporates. Google it - there's lots written about it,
both pro and con.

San Francisco converted a year or so ago. I don't grow water-quality
sensitive plants, and the plants I do grow haven't complained.

-Eric in SF
www.orchidphotos.org