national assessment

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  • Ecological Health in the Nation’s Streams, 1993–2005

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    Ecological Health in the Nation’s Streams, 1993–2005

    USGS | July 2, 2013...
    Summary

    This report summarizes a national assessment of the ecological health of streams done by the U.S. Geological Survey's (USGS) National Water-Quality Assessment Program...

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  • Nutrients in the Nation’s Streams and Groundwater, 1992–2004

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    Nutrients in the Nation’s Streams and Groundwater, 1992–2004

    USGS | June 6, 2011...
    Summary

    This report is one of a series of publications, The Quality of Our Nation’s Waters, which describes major findings of the NAWQA Program...

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  • Pesticides in the Nation’s Streams and Ground Water, 1992–2001

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    Pesticides in the Nation’s Streams and Ground Water, 1992–2001

    USGS | February 28, 2006...
    Summary

    This report is one of a series of publications, The Quality of Our Nation’s Waters, that describe major findings of the NAWQA Program...

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  • Quality of Water from Domestic Wells in Principal Aquifers of the United States, 1991–2004: Overview of Major Findings

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    Quality of Water from Domestic Wells in Principal Aquifers of the United States, 1991–2004: Overview of Major Findings

    USGS | November 5, 2009...
    Summary

    This report is one of a series of publications, The Quality of Our Nation’s Waters, which describes major findings of the NAWQA Program...

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  • Quality of Water from Public-Supply Wells in the United States, 1993–2007: Overview of Major Findings

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    Quality of Water from Public-Supply Wells in the United States, 1993–2007: Overview of Major Findings

    USGS | July 12, 2010...
    Summary

    In this study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS), chemical water-quality conditions were assessed in source...

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  • Volatile Organic Compounds in the Nation’s Ground Water and Drinking Water Supply Wells

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    Volatile Organic Compounds in the Nation’s Ground Water and Drinking Water Supply Wells

    USGS | August 29, 2014...
    Summary

    This national assessment of 55 volatile organic compounds (VOCs) in ground water gives emphasis to the occurrence of VOCs in aquifers that are...

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