National Water Quality Data

U.S. Geological Survey, Environmental Protection Agency, National Water Quality Monitoring Council

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The National Water Quality Data Portal integrates publicly available water quality data from the Geological Survey’s National Water Information System, the Environmental Protection Agency’s Storage and Retrieval (STORET) Data Warehouse, and the Department of Agriculture’s Sustaining the Earth’s Watersheds Agricultural Research Database System (STEWARDS). Information includes a wide variety of site and sampling parameters, available for each sample location since the beginning of that database.

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