We've made some changes to EPA.gov. If the information you are looking for is not here, you may be able to find it on the EPA Web Archive or the January 19, 2017 Web Snapshot.

Watershed Index Online

Featured Programs/Projects/News:

Watershed Index Online

The Watershed Index Online (WSIO) is a comparative analysis tool and data library that helps users compare watersheds in a user-defined geographic area, for a purpose of their choice, using factors most relevant to their comparison. The content in this site is technical and intended for scientific audiences.

 

Learn About WSIO:

 

Assess Watersheds:

         
                         
 
 
 
 
Watershed Index Screening Tool