Age: ONCE Melbourne’s water supply levels fall below 29.3% of catchment capacity by year end, unless there is above normal rainfall, level 4 water restrictions are supposed to apply to Melbourne consumers automatically. Even so, the problem for Melbourne is more a lack of confidence than a lack of water. Even at 29% capacity, this amounts to 516 gigalitres compared with Melbourne’s annual consumption, under current 3a restrictions, of 380GL. Even without rain and the 150GL at the …