Since irrigation sues such a large amount of water why not start there when it is overlooked? http://www.IrrigationThatMakesSense.org is a non profit group trying to battle our national water issues by providing funding and installation of green irrigation products. They have a irrigation product that conserves up to 80% of water use after two years. Their product is installed sub-surface therefore you never see it watering. It makes the plants stronger, uses less fertilizer along with water and no over spray onto sidewalks and roads. The cost to install their underground irrigation product is comparable to overhead sprinklers but this is the green irrigation choice.