National Water Quality Inventory Reports (Renewal)

The Clean Water Act Section 305(b) reports contain information on whether waters assessed by a state meet the states water quality standards, and, when waters are impaired, the pollutants and potential sources affecting water quality. This information helps states and the public track progress in addressing water pollution. Section 303(d) of the Clean Water Act requires states to identify and rank waters that cannot meet water quality standards (WQS) following the implementation of technology-based controls. Under Section 303(d), states are also required to establish total maximum daily loads (TMDLs) for listed waters not meeting standards because of pollutant discharges. In developing the Section 303(d) lists, states are required to consider various sources of water quality related data and information, including the Section 305(b) state water quality reports. Section 106(e) requires that states annually update monitoring data and use it in their Section 305(b) report. Section 314(a) requires states to report on the condition of their publicly owned lakes within the Section 305(b) report.

The latest form for National Water Quality Inventory Reports (Renewal) expires 2029-01-31 and can be found here.