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.

LDEQ's 2024 IR was submitted to EPA on March 28, 2024 and fully approved by EPA on July 2, 2024. It is now considered final and the official report for permitting and other purposes. LDEQ began the next IR cycle with the publication of a public notice on April 2, 2025 to solicit data regarding water body subsegments assessed in the 2026 IR. The deadline for receipt of data was Wednesday, May 7, 2025.

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) 219-3211.

EPA's How's My Waterway Tool

How's My Waterway was developed by EPA to display assessment data for all 50 states. Since states may assess waterbodies in different ways, the underlying assessment information is the same as LDEQs currently approved IR but may be displayed in a different manner. The tool allows the public to search EPA's ATTAINS database, which is populated by LDEQ and other state agencies, for water quality information pertaining to their community. The information contained in How's My Waterway, does not supersede LDEQ's own assessment information found in the preceding links.