National Hydrography Data - NHD and 3DHP

• Published by: California Department of Water Resources
• Last updated: Tuesday, May 5, 2026
• File types: WEBSITE, ARCGIS GEOSERVICES REST API, PDF, ZIP, CSV, WEB VIDEOS

The USGS National Hydrography Dataset (NHD) downloadable data collection from The National Map (TNM) is a comprehensive set of digital spatial data th...