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    Aircraft Noise Climates

    Metadata Updated: February 1, 2026

    A. SUMMARY San Francisco International Airport (SFO) keeps track of aircraft noise levels in communities around the airport 24/7. Measured aircraft noise events are used in calculations to determine Aircraft Community Noise Equivalent Level (CNEL). This noise metric is used to assess and regulate aircraft noise exposure in residential communities surrounding the airport. The annual Aircraft CNEL helps validate the 65‐decibel noise impact contour, an output of computer noise modeling.

    B. HOW THE DATASET IS CREATED This dataset consists of measured aircraft noise events at each of SFO’s 29 community noise monitoring sites. Also provided as part of this dataset is ANEEM Aircraft CNEL. This aircraft climate is derived using ANEEM algorithms that can measure quieter aircraft noise levels below that of conventional threshold correlation methodology resulting in improved noise to aircraft correlations.

    C. UPDATE PROCESS Data is available starting in March 2017. Aircraft climates derived using ANEEM algorithms are available starting January 2023. This dataset will be updated on a monthly basis.

    D. HOW TO USE THIS DATASET This information is used to produce the monthly Aircraft Noise Levels section on page 1 of the Airport Director’s Report. These reports are presented at the SFO Airport Community Roundtable Meetings and available online at https://www.flysfo.com/about/community-noise/noise-office/reports/airport-directors-report

    Please contact the Noise Abatement Office at NoiseAbatementOffice@flysfo.com for any questions regarding this data.

    Date created: June 27, 2023

    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 July 29, 2023
    Metadata Updated Date February 1, 2026

    Metadata Source

    Harvested from SFO JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 29, 2023
    Metadata Updated Date February 1, 2026
    Publisher data.sfgov.org
    Maintainer
    Identifier https://data.sfgov.org/api/views/qxw2-ncq3
    Data First Published 2023-11-20
    Data Last Modified 2026-01-27
    Category Transportation
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.sfgov.org/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 a92aa848-71ce-4165-9c06-a8cebcf8383b
    Harvest Source Id 8507fa43-f429-4095-b732-2177330ce485
    Harvest Source Title SFO JSON
    Homepage URL https://data.sfgov.org/d/qxw2-ncq3
    License http://opendatacommons.org/licenses/pddl/1.0/
    Source Datajson Identifier True
    Source Hash 8465ed901237cd0ecd52e30f5de198c59e772dded3f2eb898728e65e40d27a08
    Source Schema Version 1.1

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