USGS - science for a changing world

USGS Home
Contact USGS
Search USGS

NAS - Nonindigenous Aquatic Species

water

small fish

Query by Drainage (8-digit HUC)

Select the state that contains the drainage you are interested in.

Image of State

Image Map courtesy of EPA's Surf Your Watershead program

Download Adobe Reader

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://nas.er.usgs.gov
Page Contact Information: Pam Fuller - NAS Program
Page Last Modified: Aug 19, 2009