AT a time of year when it traditionally boasts peak water storage, the water levels at Mundaring Weir sit at just 37.8 per cent capacity.
The levels are less than the 41 per cent capacity around this time last year, making this October’s level the lowest in at least seven years.
The highest recent level was October 2009 when storage reached 45.57GL — which is about 71 per cent full.
Perth has had 458mm of rain since the start of May, compared with 618mm received during the same timeframe last year.
Across the dams in the metropolitan area, capacity is at 28.7 per cent, which is significantly down from the 39.5 per cent this time last year.
According to Water Corporation, Perth’s rainfall has reduced by around 15 per cent since the 1970s and inflow to dams is continuing to decline.
Perth’s dams received the second lowest inflows on record this year, receiving only 11.3 billion litres of water to date.
On a hot summer’s day, Perth can use about 1 billion litres of water.