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    • Arsenic Speciation method performance data, species hold times data and supporting information

    Metadata Updated: January 20, 2026

    This dataset includes data collected to validate a method of analysis for arsenic species As(III), As(V), dimethylarsinate (DMA), and monomethylarsonate (MMA) in surface water and groundwater samples. It also includes site information and water chemistry for samples used in the validation and used for other studies of arsenic species in groundwater. It includes speciation data measured at multiple time points to establish or verify hold times and stability of As species in surface water and groundwater samples.

    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 12, 2026
    Metadata Updated Date January 20, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 12, 2026
    Metadata Updated Date January 20, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5d65a915e4b0c4f70ceeb319
    Data Last Modified 2020-08-20T00:00:00Z
    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
    Datagov Dedupe Retained 20260120143730
    Harvest Object Id 2bb59cff-0092-4140-9219-7cf59851f947
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -125.33203125, 24.367113562651, -125.33203125, 49.724479188713, -66.4453125, 49.724479188713, -66.4453125, 24.367113562651, -125.33203125, 24.367113562651}
    Source Datajson Identifier True
    Source Hash 81a9526311f72689a7f9816d550291c1e8cf1abafc650a3f853364bbf1490a3d
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -125.33203125, 24.367113562651, -125.33203125, 49.724479188713, -66.4453125, 49.724479188713, -66.4453125, 24.367113562651, -125.33203125, 24.367113562651}

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