Alert Risk Maps Released Across the United States Since June 2018
![Map of the United States with red dots indicating the geographic position of all USGS Alert Risk Maps created](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/NAS_ARM_National.jpg?itok=yKXq5Ihy)
Detailed Description
USGS Alert Risk Maps (ARMs) display lakes, river reaches, and other water bodies potentially at risk of invasion by a new non-native species. The ARMs span the conterminous U.S.
Sources/Usage
Public Domain.