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    • Data and model for mapping groundwater total dissolved solids at the San Ardo Oil Field, Monterey County, California, USA

    Metadata Updated: September 13, 2025

    The U.S. Geological Survey (USGS) compiled and analyzed data for mapping groundwater total dissolved solids (TDS) at the San Ardo Oil Field in Monterey County, California. Data include groundwater TDS and bicarbonate concentration from oil well and groundwater well samples, formation resistivity from borehole geophysical logs, porosity from well logs and rock core samples, temperature from water samples and well logs, selected oil well injection volumes, and geological formation depths. The data reported here are used in an accompanying manuscript (Stephens and others, 2025) that describes methods and results of mapping groundwater TDS. The modeled values from the related manuscript are also provided. A portion of these data were found in archived scanned pages in raster format on the California Geologic Energy Management Division (CalGEM) website (CalGEM, 2022) and have been compiled into machine readable numerical format. Other data, such as the geological layers, were generated during this project by interpreting borehole geophysical data from CalGEM (2022). All the data analyzed are part of the California State Water Resources Control Board Oil and Gas Regional Monitoring Program and the USGS California Oil, Gas, and Groundwater (COGG) program.

    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.

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    Dates

    Metadata Created Date September 13, 2025
    Metadata Updated Date September 13, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date September 13, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-65c3d40dd34ef4b119cae726
    Data Last Modified 2025-05-19T00:00:00Z
    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 5a6bc792-3450-417a-83a1-e996f42413c4
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -120.9270, 35.8806, -120.7552, 36.0366
    Source Datajson Identifier True
    Source Hash f932154a00c6c05f5bbfdafa57dcb8474139379cd1b2ce18b7750ca550964915
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -120.9270, 35.8806, -120.9270, 36.0366, -120.7552, 36.0366, -120.7552, 35.8806, -120.9270, 35.8806}

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