Reusing water is going to play a pivotal role in helping lessen the drain we place on water as a natural resource, and reusing laundry water, (belonging to a category of waste water called greywater) can play a pivotal role. It's easy to water your garden this way, and if you don't feel safe having Tide in your garden, one can easily switch to one of many environmentally friendly detergents. All this takes is a large drum to store the water, a hose to reroute the washer water, a water pump for the water tank, and a long hose to your garden. Often long pieces of tubing with holes along the length are associated with this set up, called drip irrigation. I can see this set up becoming far more popular over the next few years, especially if the southwest drought continues to deepen.