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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    Radiological Air Sample Quarterly Composites

    Metadata Updated: November 23, 2025

    IMPORTANT: Please see the attached PDF for more context on this dataset. Per Health and Safety Code 114755 which mandates that "The department shall monitor radioactive materials in the environment", air sampling stations have been placed in or near major population centers with the potential for significant radiological activity. The data presented in this table are for quarterly aggregates of sampling media per site. Dose per quarter is reported in millirem Total Effective Dose Equivalent (TEDE); all other values are radiological activity concentrations reported in units of picoCuries per cubic meter. Any positive result less than the minimum detectable activity is attributable to statistical measurement noise, and results are reported even in the case of non-detection. Beryllium-7 and Potassium-40 are naturally occurring radionuclides. The other radionuclides in the dataset are fission products. Detection of Cesium-137 is not necessarily indicative of a new release because atmospheric nuclear weapons testing distributed significant amounts across the world that are still measurable.

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date November 27, 2024
    Metadata Updated Date November 23, 2025

    Metadata Source

    Harvested from State of California

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 27, 2024
    Metadata Updated Date November 23, 2025
    Publisher California Department of Public Health
    Maintainer
    Identifier 94f07581-be82-400c-b05a-b302febf0b53
    Data First Published 2017-06-16T22:09:47.895921
    Data Last Modified 2025-11-07T05:02:24.564597
    Category Health and Human Services
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    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 ab821be0-a5df-4029-8166-a43d623070ad
    Harvest Source Id 3ba8a0c1-5dc2-4897-940f-81922d3cf8bc
    Harvest Source Title State of California
    License http://www.opendefinition.org/licenses/cc-by
    Source Datajson Identifier True
    Source Hash cf1d9b9dd65ff3388d17fe2538b7dafab14d12dc9855ef502a6669d461c3d22b
    Source Schema Version 1.1

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