Water use usually doesn't get as much attention as issues like energy, but it's just as important (and actually impacts energy in places like California, where almost 20% of the state's electricity is used just to pump water around). Greywater Corps is a cool new LA-based company that helps make it easier to conserve water; they set up simple, attractive systems that reuse greywater to keep your garden watered and happy.
"Greywater" includes all the wastewater coming from your laundry, shower, bathtub, or bathroom sink. It doesn't include water from toilets or kitchen sinks. Instead of sending greywater into the sewer, you can use it to water the trees and plants in your yard.
Greywater Corps, founded by an architect and ecologist, will send a team to your house to quickly set up a greywater system and teach you how to use it. Through the money you'll save on water, you can usually earn back the money a system will cost you in about two years. You'll get a system custom designed for your home, and options are even available for rentals. Although Greywater Corps only works in the LA area, similar services exist in other cities-- share your recommendations in the comments below.
Images: Greywater Corps