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    • Third-party performance assessment data encompassing the time period of analysis of groundwater samples collected for hormones and pharmaceuticals by the National Water-Quality Assessment Project in 2013-15

    Metadata Updated: January 7, 2026

    This data set includes sample information and results for third-party performance assessment samples analyzed for hormones and pharmaceuticals during the same general time period as environmental samples collected by the National Water-Quality Assessment (NAWQA) Project for a study of groundwater resources used for drinking-water supply across the United States, 2013 through 2015. Hormone and pharmaceutical results are provided for spiked and unspiked samples submitted by the Quality Systems Branch (QSB) Organic Blind Sample Project (OBSP)(https://bqs.usgs.gov/obsp/), providing information regarding analyte recovery and occurrence of false positive and false negative results.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date January 7, 2026
    Metadata Updated Date January 7, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 7, 2026
    Metadata Updated Date January 7, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5af4654ee4b0da30c1b448f7
    Data Last Modified 2020-08-26T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 95e6ec66-8b6e-4aa3-9840-e2ef75f49b83
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -125.41992187500001, 23.644524198573688, -65.91796875000001, 49.66762782262194
    Source Datajson Identifier True
    Source Hash 23af40f8e5eaa385688c21fe277c8ffd3d80358d71eb7c8f844dfbe7d43195bc
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -125.41992187500001, 23.644524198573688, -125.41992187500001, 49.66762782262194, -65.91796875000001, 49.66762782262194, -65.91796875000001, 23.644524198573688, -125.41992187500001, 23.644524198573688}

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