The Water Corporation has flagged the potential extension of winter sprinkler bans as Perth faces an “an accelerating drying trend” of annual water run-off.

http://www.abc.net.au/news/2016-01-28/sprinkler-ban-extension-on-cards-as-perth-faces-drying-trend/7119268

Source: Perpitch N. 2016, www.abc.net.au.