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    • National Lakes Assessment Data

    Metadata Updated: February 10, 2026

    The National Lakes Assessment (NLA) is a statistical survey of the condition of our nation's lakes, ponds, and reservoirs. It is designed to provide information on the extent of lakes that support healthy biological condition and recreation, estimate how widespread major stressors are that impact lake quality, and provide insight into whether lakes nationwide are getting cleaner.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    No file downloads have been provided. The publisher may provide downloads in the future or they may be available from their other links.

    References

    https://www.epa.gov/national-aquatic-resource-surveys/nla
    https://edg.epa.gov/metadata/rest/document?id=%7B668F7BE3-50D1-465C-A73D-B21625689159%7D
    https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B668F7BE3-50D1-465C-A73D-B21625689159%7D

    Dates

    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Data Update Frequency irregular

    Metadata Source

    Harvested from EPA Non Geo Repository

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 30, 2026
    Metadata Updated Date February 10, 2026
    Publisher U.S. EPA Office of Water (OW) - Office of Wetlands Oceans and Watersheds (OWOW)
    Maintainer
    Identifier {668F7BE3-50D1-465C-A73D-B21625689159}
    Data First Published 2014-01-01
    Data Last Modified 2010-08-13
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 020:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://edg.epa.gov/data/nongeo_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 b6791405-cba3-4c5b-98b4-d667003cf96f
    Harvest Source Id 9c1c2b5b-7925-4ca2-a663-ca2131653db1
    Harvest Source Title EPA Non Geo Repository
    License https://edg.epa.gov/EPA_Data_License.html
    Old Spatial -180.0,18.0,-66.0,72.0
    Program Code 020:072
    Related Documents https://www.epa.gov/national-aquatic-resource-surveys/nla, https://edg.epa.gov/metadata/rest/document?id=%7B668F7BE3-50D1-465C-A73D-B21625689159%7D, https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B668F7BE3-50D1-465C-A73D-B21625689159%7D
    Source Datajson Identifier True
    Source Hash f66262b49cba7cc77d1c3c0699d2ba6383c752ae57271cf478257a846e93e203
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -180.0, 18.0, -180.0, 72.0, -66.0, 72.0, -66.0, 18.0, -180.0, 18.0}

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