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BASINS multi-purpose environmental analysis system

BASINS (Better Assessment Science Integrating Point and Nonpoint Sources) is a multipurpose environmental analysis system that integrates a geographical information system (GIS) national watershed data, and state-of-the-art environmental assessment and modeling tools into one convenient package. This system is designed for use by regional, state and local agencies in performing watershed and water quality-based studies. It is maintained by the U.S. Environmental Protection Agency.