Louisiana Water Quality Integrated Report (Clean Water Act Sections 305(b)/303(d))

The Integrated Report (IR) is the current format for the state’s biennial reports on the water quality of Louisiana surface waters. The IR, formerly known separately as the 305(b) Report and the 303(d) List, is a requirement of the federal Clean Water Act. It is developed every even numbered year and submitted to the U.S. Environmental Protection Agency (EPA) for approval of the 303(d) List portion of the report. Current and previous Water Quality Integrated Reports can be found below.

The 2020 Water Quality Integrated Report is currently considered final and approved by EPA. Therefore, the 2020 IR should be used for all activities requiring up-to-date water quality assessment information, as well as for information on all aspects of LDEQ’s water quality management programs. 


305(b) Reports and 303(d) Lists from prior to 2014, including related documents, are available in EDMS using AI # 169294 and “305(b)/303(d)” in the description.



More information on Louisiana's IR process can be obtained by e-mailing the Water Planning and Assessment Division or by phone at (225)219-3189.