The general factoid being used right now is over 50% of the Potable Water is used on outdoor landscapes and 50% of that is wasted. If we as an industry do not police ourselves then we very well could see a move to remove turf grass or reduce it's use drastically.
Plants will use pretty much all the water you put on them unless your drown them. Kiril and I both come from States with water management plans. Texas is no where as strict as Cali but we are headed that way.
There is a movement to take away Turf Grass and wasteful use of water is going to make that happen. It is not that we want to be retentive about it but there is a lot that goes into effective irrigation systems.