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

    MS4 Storm Sewer Outfalls

    Metadata Updated: February 18, 2026

    The dataset contains locations and attributes of the MS4 Storm Sewer outfalls created as part of the District MS4 Permit. GPS outfall locations were captured in 2004-2006 by, then, DC WASA. A database provided by WASA identified outfalls, drainage structures, and MS4 outfall locations. The data was later verified in conjunction between DOEE and DCWater along with field verification. Updates occur as needed. This data is used for planning and modeling purposes by various District programs. This data is a requirement of the District's MS4 Permit.

    Outfall ID Identification:

    0-1999 - Originally provided outfall IDs

    2000-2999 – Outfalls discovered from GIS and map analysis and later field verified

    3000-3999 – Outfalls discovered during field work but with no additional info available

    4000-4999 – Outfalls that can not be found in the field or cannot be verified

    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: Creative Commons Attribution

    Downloads & Resources

    Dates

    Metadata Created Date April 30, 2024
    Metadata Updated Date February 18, 2026

    Metadata Source

    Harvested from DC data

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 30, 2024
    Metadata Updated Date February 18, 2026
    Publisher City of Washington, DC
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=03795a44b05f41a1ae9d46a59a9227d8&sublayer=68
    Data First Published 2019-03-26T15:24:53.000Z
    Data Last Modified 2026-02-06T00:00:00.000Z
    Category geospatial
    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 5ced0395-3507-49b8-9ff5-292232ec7847
    Harvest Source Id b05f955a-65d6-4288-9558-15a5ebc74e36
    Harvest Source Title DC data
    Homepage URL https://opendata.dc.gov/datasets/DCGIS::ms4-storm-sewer-outfalls
    License https://creativecommons.org/licenses/by/4.0
    Metadata Type geospatial
    Old Spatial -77.1120,38.8060,-76.9117,38.9920
    Source Datajson Identifier True
    Source Hash 4e29696a612e89edcf47633a7e888016b0a2ef5becc002fb5df5317bab64802f
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -77.1120, 38.8060, -77.1120, 38.9920, -76.9117, 38.9920, -76.9117, 38.8060, -77.1120, 38.8060}

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