Query by major hydrologic unit


This page allows you to query for an up-to-date listing of nonindigenous species by major hydrologic unit. You may either select the area of interest from the scrolled list on the left, or by clicking on the map below.

(records per page)


Huc2Map 1 New England 2 Mid-Atlantic 3 South Atlantic-Gulf Great Lakes 5 Ohio 7 Upper Mississippi Lower Mississippi 9 Souris-Red-Rainy 10 Missouri 11 Arkansas-White-Red 12 Texas-Gulf 13 Rio Grande 15 Lower Colorado 16 Great Basin 17 Pacific Northwest 18 California 19 Alaska 20 Hawaii 14 Upper Colorado 6 Tennessee nothing

Disclaimer:

The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [4/19/2024].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.