Colorado Division of Water Resources
DWR, also known as the Office of the State Engineer, administers water rights, issues water well permits, monitors streamflow and water use, and maintains numerous databases of Colorado water information.
Colorado Water Institute
The Colorado Water Institute, an affiliate of Colorado State University, exists for the express purpose of focusing the water expertise of higher education on the evolving water concerns and problems being faced by Colorado citizens. This site contains multiple links to other water resources and contacts for water professionals at Colorado State University.
Nonpoint Source Colorado
This site provides information on non-point source (CO 913) water pollution and related issues.
USGS Colorado Water Science Center
These pages are your source for water-resource information collected and interpreted by the U.S. Geological Survey in Colorado.