Oasis Grey Water Policy Center
Oasis Design, a maker of graywater systems, maintains this compilation of graywater laws and other resources on the regulation of graywater use.
American Rainwater Catchment Systems Association
This organization promotes rainwater catchment in the U.S.
EPA Office of Water
The Office of Water coordinates EPA's efforts to protect drinking water, oceans, watersheds and other aquatic ecosystems.
Alliance For Water Efficiency
AWE advocates for water-efficient products and programs and provides information related to water conservation.
EPA Water Information links
This website offers links to state and regional water information.
WATERGY version 3.0
WATERGY is a spreadsheet model that uses water/energy relationship assumptions to analyze the potential of water savings and associated energy savings.
Energy Policy Act of 2005
The Energy Policy Act (EPA) addresses energy production in the United States. One example, the Act provides loan guarantees for entities that develop or use innovative technologies that avoid the by-production of greenhouse gases.
Energy Policy Act of 1992 and amendments
Pages 62-69 of this legislation set federal standards for plumbing fixtures.
Lady Bird Johnson Wildflower Center, The University of Texas at Austin
This website offers a database of more than 7,000 native plants in North America.
Center for Irrigation Technology (CIT)
CIT is an independent research and testing facility providing information to designers, manufacturers and users of irrigation equipment.