National Hydrography Dataset & Watershed Boundary Dataset in Idaho

Download NHD Data

NHD Data may be downloaded from the NHD website by hydrologic unit or by sub region. If you have questions about what data is currently being updated, please check the Updates Page or contact Genna Ashley at genna.ashley@idwr.idaho.gov or (208) 287-4880.


Do You Have Edits to the NHD?

If you have edits for the NHD, please read our NHD Edit submission guide.


Are you interested in becoming a NHD SubSteward? Local Stewards receive training using the USGS NHD Update tools and provide data to the Idaho Data Steward. If you are interested, please email us.



How Do You Use the NHD?

How do you use the NHD? Please email us and inspire others to use the NHD in ways we never thought of before!

Contact Information:

Genna Ashley
Idaho NHD Technical Point of Contact
Phone: (208) 287-4880

Linda Davis
Idaho NHD Principal Steward
Phone: (208) 287-4877

Idaho Department of Water Resources
322 East Front Street
PO Box 83720
Boise, Idaho 83720-0098

For a list of contacts for neighboring states, as well as a list of contacts for specific regions or hydrologic units, please email Genna Ashley.

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