Colorado River Basin - 303(d) List
On June 28, 2007, USEPA gave final approval to California's 2006 Section 303(d) List of Water Quality Limited Segments. The approved 303(d) List for the Colorado River Basin Region contains the Region's impaired surface water bodies, hydrologic unit number, the number of affected miles, sources of pollution, and timeline for TMDL development.
More information on the 303(d) List can be viewed at the State Water Board's Website: http://www.waterboards.ca.gov/.