EBMUD WaterSmart Center – Resource center for water-saving rebates, tips, free devices and events.
California’s “Save Our Water” Program – State program with water-saving tips and other tools.
H2OUSE – An interactive home tour offers many do-it-yourself indoor and outdoor water-saving tips and conservation tools for the home.
EPA’s WaterSense – A program of the U.S. Environmental Protection Agency that helps consumers choose water efficient appliances.
Greywater Action – “For a Sustainable Water Culture.” Through hands on workshops and presentations, they’ve educated hundreds of people about the process of greywater system design and construction, and built greywater systems at dozens of houses in cities around California and beyond. Their web site has lots of information and answers to common questions.