This weekend brings a bittersweet moment when Sydneysiders are reminded that we don’t live on just those sweet rains from heaven. After six years of trouble and tempest, we’re getting our desalination plant back.

The plant, at Kurnell, is designed to be used when Sydney’s dams fall below 60 per cent capacity, a (water) mark expected this weekend.

When running at full tilt, in six to eight months from switching on, the plant will produce 250 million litres a day – or about 15 per cent of Sydney’s drinking water.