The Clean Water Act (CWA), Section 305(b) (US Congress, 2002) and the Tennessee Water Quality Control Act (Tennessee Secretary of State, 1999) both require a biennial report about the status of water quality in the state. This is known as the 305(b) Report. Also required every two years is the 303(d) Report. The 303(d) List is a compilation of the streams and lakes in Tennessee that are "water quality limited" or are expected to exceed water quality standards in the next two years and need additional pollution controls. Water quality limited streams are those that have one or more properties that violate water quality standards. They are considered impaired by pollution and not fully meeting designated uses. These reports provide an evaluation of the current conditions of our waters, but only about 20% of Tennessee's rivers and streams have been monitored.