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    • Wadeable Streams Assessment Data

    Metadata Updated: February 10, 2026

    The Wadeable Streams Assessment (WSA) is a first-ever statistically-valid survey of the biological condition of small streams throughout the U.S. EPA worked with the states to conduct the assessment in 2000-2004. 1,392 sites were selected at random to represent the condition of all streams in regions that share similar ecological characteristics. Participants used the same standardized methods at all sites, to ensure results that are comparable across the nation.

    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://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B05E98574-1292-4377-AC6F-AE64C35A9889%7D
    https://edg.epa.gov/metadata/rest/document?id=%7B05E98574-1292-4377-AC6F-AE64C35A9889%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 {05E98574-1292-4377-AC6F-AE64C35A9889}
    Data First Published 2014-01-01
    Data Last Modified 2009-12-23
    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 68efa2fa-7129-40f2-95cb-0a8df1e45f9a
    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://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B05E98574-1292-4377-AC6F-AE64C35A9889%7D, https://edg.epa.gov/metadata/rest/document?id=%7B05E98574-1292-4377-AC6F-AE64C35A9889%7D
    Source Datajson Identifier True
    Source Hash 0061028b2022e2f960496b9160bed67ca4eed3efd6c026ff3eb3f7d7af80d287
    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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