Water Quality Standards and Assessment
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 the Water Planning and Assessment Division.
Public Notice of Corrective Action on 2016 Water Quality Integrated Report - It has recently come to the attention of the Louisiana Department of Environmental Quality, Water Planning and Assessment Division that Calcasieu River and Ship Channel (LA030301_00) was incorrectly assessed as impaired with the suspected cause of “Oxygen, Dissolved” for Louisiana’s 2016 Water Quality Integrated Report (IR). The proposed corrective action is described in Documentation of Corrective Action. The public comment period begins Wednesday, May 31, 2017 and ends at 4:30 p.m., Monday, July 3, 2017.
2016 Triennial Review - Surface Water Quality Standards for Louisiana
FINAL 2016 Louisiana Water Quality Inventory: Integrated Report (305(b)/303(d))Water Quality Assessment - On February 10, 2017 the 2016 Louisiana Water Quality Integrated Report was approved by EPA with one Integrated Report Category (IRC) revision to one subsegment. All other portions of the report have been fully approved by EPA. The assessments contained in the report are now considered final.
A Long-Term Vision for Assessment, Restoration, and Protection under the Clean Water Act Section 303(d) Program
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 in Part IX: Water Quality Chapter 11.
- BEACH Act Recreational Criteria for Louisiana’s Coastal Marine Primary Contact Recreation Waters - On May 20, 2016, LDEQ adopted final BEACH Act Criteria for Louisiana’s coastal marine waters (Rule WQ092 in Louisiana Register (http://www.doa.la.gov/osr/REG/1605/1605.pdf). LDEQ submitted the final certified rule package to EPA Region 6 for approval on June 8, 2016 (EDMS Document ID 10221023);EPA approved the final rule on September 1, 2016 (EDMS Document ID 10341562). In summary, the revisions contained in rule WQ092 added a definition for enterococci to LAC 33:IX.107 and 1105. Additionally, revisions were made to LAC 33:IX.1113 and 1123 to adopt enterococci criteria for 133 coastal marine subsegments designated as primary contact recreation waters. Additional documentation relating to WQ092 rulemaking efforts can be found by searching EDMS using Agency Interest number 168750 and limiting the search to documents after October 2014 with WQ092 in the description field.
- Dissolved Oxygen Criteria Use Attainability Analysis in the Barataria and Terrebonne Basins
- Dissolved Oxygen Criteria Use Attainability Analysis in the Eastern Lower Mississippi River Alluvial Plains Ecoregion and Proposed Updates to Volume 4 of the Water Quality Management Plan
- Ambient Surface Water Quality Monitoring Data - Surface water quality data collected routinely by LDEQ at locations throughout the state.
- Quality Assurance Project Plan for the Ambient Surface Water Quality Monitoring Network (QAPP_1004_R08)
- 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 2012 through the FINAL 2016 are available.
- Total Maximum Daily Load (TMDL) Program
- Water Quality Survillance - LDEQ's Surveillance Division conducts ambient surface water monitoring.
- Geographic Information System - Provides mapping information for Louisiana's water bodies, monitoring sites, and more.
- Louisiana's Fishing and Swimming Advisories - Fish consumption and swimming advisories are issued jointly by the Louisiana Department of Health, Louisiana Department of Wildlife and Fisheries, and LDEQ.
- DEQ Mercury Initiative - LDEQ's program to reduce and where possible eliminate mercury releases to the environment.