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The report describes the procedures used to select, retrieve, compile, and screen a lake and reservoir data base from the STORET (STOrage and RETrieval) system of the U.S. Environmental Protection Agency. Procedures used to select, compile, and screen the size of the data base also are discussed. The retrieved data comprise 116 water-quality and biological constituents and physical and morphometric factors commonly used to assess the limnology and water quality of lakes and reservoirs. INTRODUCTION The public and public officials are becoming increasingly concerned with changes in environmental quality. Much of this concern is directed to environmental stresses such as eutrophication, acid rain, and hazardous chemicals resulting from human activities. Because of the need to provide adequate information for identifying water-related issues in the United States, the U.S. Geological Survey (USGS) has initiated a report, the "National Water Summary." A primary goal of this report is to provide accurate water-resources information for individuals, officials, and agencies of the Federal and State governments involved in the formulation of policy and management of the Nation's water resources. The report also provides information regarding the conditions of our Nation's waters.

Documentation of a data base on lake and reservoir water quality in the United States