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.

All 2022 IR documents have been updated based on corrections made after full appproval by EPA of the 2022 IR on May 3, 2022. All corrections were public noticed between July 8, 2022 and August 11, 2022, with no comments received from the public or EPA. Therefore, all 2022 IR assessment are considered final and approved for all uses. 

LDEQ published a public notice on January 4, 2024 to solicit public comment on the 2024 IR Rationale and DRAFT §305(b)/§303(d) list. The 2024 IR assessment is not considered final at this time, the 2022 IR assessment is still the official report for permitting and other purposes. The deadline for receipt of comments was 4:30 p.m., Monday, February 5, 2024.




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.