The Seventh American Water Resources Conference will be held at the Statler Hilton Hotel in Washington, D.C., October 25–29, 1971. The main purpose of the conference is to review and give a comprehensive picture of the whole water resources field in the United States each year. Papers are invited in any aspect of water resources research, planning, development, management, education and information systems including social, economic, and political topics. However, special attention will be given to issues related to water quality and environmental considerations of water resources policies and standards.