This page is meant to act as an archival repository for previous versions of the statewide NHD and WBD datasets released by USGS. All data are presented in their original, unmodified format as downloaded from USGS. Be aware that the data do not come with a geometric network; directions for building the geometric network can be found in the text file on this resource page called "How to Create NHD Network".
The Department of Water Resources (DWR) is responsible for managing and protecting California’s water resources. DWR works with other agencies to benefit the State’s people and to protect, restore and enhance the natural and human environments.