Water quality in Louisiana is managed under the two broad areas of surface water and groundwater. Surface water management seeks to protect the quality of all waters of the state, including rivers, streams, bayous, lakes, reservoirs, wetlands, estuaries, and many other types of surface water. The Aquifer Evaluation and Protection Unit seeks to protect the quality of all waters found in underground aquifers as well as the surface water sources of that groundwater. For more information on surface water quality data, standards, and assessment please email Water Quality Contact.
REVISED DRAFT 2014 Louisiana Water Quality Inventory: Integrated Report (305(b)/303(d)) - A FINAL DRAFT of the Louisiana Water Quality Integrated Report (305(b)/303(d) was submitted to EPA on August 19, 2014 for review and approval. Following discussion with EPA Region 6 LDEQ revised Section 303(d) TMDL prioritization on September 19, 2014. Revisions are described on the page/link above. This REVISED DRAFT is provided here for information only and is not considered final until EPA's final decision has been announced.
FINAL 2012 Louisiana Water Quality Inventory: Integrated Report (305(b)/303(d)) - The 2012 Louisiana Water Quality Inventory: Integrated Report (305(b)/303(d)) was approved with three subsegment revisions by EPA on July 18, 2013. The report is now considered final.
Quality Assurance Project Plan for the Ambient Water Quality Monitoring Network (QAPP_1004_R08)
All Other Activities and Reports
Water Quality Management Plan/Continuing Planning Process
Nutrient Management Strategy - Learn more about what Louisiana is doing to manage nutrients in state surface waters.
Water Quality Regulations and Standards - Louisiana's Water Quality Regulations can be found at this link. Look for Part IX: Water Quality in the table entitled ERC (LAC Title 33). Chapter 11 of Part IX provides all water quality standards (designated uses and criteria) for Louisiana.
Dissolved Oxygen Criteria Use Attainability Analysis in the Barataria and Terrebonne Basins
Ambient Surface Water Quality Monitoring Data - Surface water quality data collected routinely by LDEQ at locations throughout the state.
Water Quality Assessments - Louisiana Water Quality Inventory: Integrated Report (305(b)/303(d)) - Surface water assessments to determine needs for protection and improvement of water quality. Reports from 1996 through the final DRAFT 2014 are available.
Total Maximum Daily Load (TMDL) Program
Water Quality Inspections Home Page - LDEQ's Inspections Division conducts ambient surface water monitoring.
GIS Center - Provides mapping information for Louisiana's water bodies, monitoring sites, and more.
Louisiana's Fishing and Swimming Advisories - Fish consumption and swimming advisories issued jointly by the Louisiana Department of Health and Hospitals and LDEQ.
DEQ Mercury Initiative - LDEQ's program to reduce and where possible eliminate mercury releases to the environment.