Skip to main content
U.S. flag

An official website of the United States government

Office of Water Linked Data

Published by U.S. EPA Office of Water (OW) | U.S. Environmental Protection Agency | Catalog Last Checked: May 01, 2026 at 06:08 PM | Dataset Last Updated: May 14, 2024
The Office of Water Linked Data (OWLD) dataset stores EPA Water program information indexed to several National Hydrography Dataset frameworks. Indexing may be accomplished by catchment, reach or hydrologic unit referencing and includes a curated set of relevant program data attributes. OWLD is closely related to the NHD Event Data model with extensions added to cover catchment-based indexing.

Resources

1 resource available

  • Office of Water GIS Services for OWLD datasets

    API

Find Related Datasets

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov