This advice from Northumbria Water, who supply the water to my house and others in the North of England
Some people do not like the taste or smell of chlorine in their tap water but there is an easy and effective way to get round this. At night before you go to bed simply fill a jug with tap water and put it in your fridge. During the night the chlorine will bubble off and the water will become chilled. In the morning you will find that the water tastes as good, if not better, than any water you can buy in a bottle.
Now, I'm not sure with this advice if putting it in the fridge is necessary. But it does seem that the advice to leave the water to stand overnight has some merit.