This is a Non-Federal dataset covered by different Terms of Use than

National Hydrography Dataset (NHD)

Metadata Updated: September 17, 2019

The USGS National Hydrography Dataset (NHD) Downloadable Data Collection from The National Map (TNM) is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of surface water (lakes, ponds, and reservoirs), paths through which water flows (canals, ditches, streams, and rivers), and related entities such as point features (springs, wells, stream gages, and dams). The information encoded about these features includes classification and other characteristics, delineation, geographic name, position and related measures, a "reach code" through which other information can be related to the NHD, and the direction of water flow. The network of reach codes delineating water and transported material flow allows users to trace movement in upstream and downstream directions. In addition to this geographic information, the dataset contains metadata that supports the exchange of future updates and improvements to the data. The NHD supports many applications, such as making maps, geocoding observations, flow modeling, data maintenance, and stewardship. For additional information on NHD, go to

DWR is the steward for NHD and Watershed Boundary Dataset (WBD) in California. We work with other organizations to edit and improve NHD and WBD, using the business rules for California. This is a process that takes time with a State as large and diverse as California. California's NHD improvements are sent to USGS, and accessible from their website.

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 License: No license information was provided.

Downloads & Resources


Metadata Created Date September 17, 2019
Metadata Updated Date September 17, 2019

Metadata Source

Harvested from State of California

Additional Metadata

Resource Type Dataset
Metadata Created Date September 17, 2019
Metadata Updated Date September 17, 2019
Publisher California Department of Water Resources
Unique Identifier ee0b84cd-6b53-4df5-9e58-455efc262fe4
Jane Schafer-Kramer
Maintainer Email
Public Access Level public
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 50f6c71c-a4c0-43ff-8a6a-529caa3d59a9
Harvest Source Id 653cc362-70fc-46e1-9fb1-e76815ee1c88
Harvest Source Title State of California
Data Last Modified 2019-09-04T04:01:37.719167
Source Datajson Identifier True
Source Hash 18b36692de7c823f775301e71f2c03e8ade665f5
Source Schema Version 1.1
Category Water, Natural Resources

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