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    • Classifications of groundwater monitoring wells as mixing with disposal water from percolation and evaporation ponds in the southwestern San Joaquin Valley, Kern County, California

    Metadata Updated: November 12, 2025

    The U.S. Geological Survey (USGS) in cooperation with the California State Water Resources Control Board compiled and analyzed data to determine the approximate extent of plumes from produced water disposal ponds during 2016-2018 when airborne electromagnetic survey data were collected near the Midway-Sunset, Buena Vista, Elk Hills, McKittrick, Cymric, North Belridge, South Belridge, and Lost Hills Oil Fields in the southwestern San Joaquin Valley (SWSJV), Kern County, California. Data were compiled from documents available in the California State Water Resources Control Board GeoTracker database and the USGS National Water Information System. Geochemistry data collected at groundwater monitoring wells were analyzed to classify shallow groundwater samples as either mixing or not mixing with produced water disposed of on land. Classification criteria and sources of related technical information reported by well owners are described in this data release.

    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 12, 2025
    Metadata Updated Date November 12, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 12, 2025
    Metadata Updated Date November 12, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-670f3731d34edd2692095df0
    Data Last Modified 2024-10-16T00:00:00Z
    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 d43760c5-1420-433c-8e0b-3d7085ba1e41
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -119.8923, 35.0254, -119.3234, 35.6922
    Source Datajson Identifier True
    Source Hash 27949fc1ce1179e1c55c4f013505f39aedd99cc02c93e44b8fc607d2c65dc9a0
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -119.8923, 35.0254, -119.8923, 35.6922, -119.3234, 35.6922, -119.3234, 35.0254, -119.8923, 35.0254}

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