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Impaired Water Bodies in Louisiana



The listing of water bodies which fail to meet water quality standards is required by section 303(d) of the Clean Water Act. Water bodies included on this list receive additional attention and resources to reduce pollution, protect public health, and provide for healthy aquatic life. EPA regularly works with states and local governments to reduce pollution, protect public health and provide for healthy aquatic life in our nation’s waters.

Proposed Action on the State of Louisiana's 2014 Clean Water Act §303(d) List

EPA is proposing a complete list of Louisiana’s impaired water bodies for 2014 by adding 43 water body segments. The proposed additions include three Gulf of Mexico coastal segments west of the Mississippi River mouth that failed to meet the state’s water quality standard for dissolved oxygen, which is necessary to support fisheries and other aquatic life. Concentrations of low dissolved oxygen in water bodies are referred to as hypoxia. The proposed addition of these segments is consistent with the agency’s actions the past three listing cycles in 2008, 2010, and 2012.

The remaining 40 segments are proposed because the agency did not receive specific data showing these segments meet water quality standards for minerals and turbidity according to the state’s current standards and methods for determining impaired waters. EPA will continue to collaborate with Louisiana to address possible revisions to its standards and methods to ensure the list reflects the most up-to-date and accurate information.

A federal register notice will be published in 7-10 days. Once published in the federal register, the proposal will be open for a 30 day public comment period.

EPA letter to the Louisiana Department of Environmental Quality (1 p, 60 KB, About PDF)
Pre-publication Federal Register Notice (4 pp, 120 KB About PDF)
Record of Decision (19 pp, 522 KB About PDF)

Final Action on the State of Louisiana's 2012 Clean Water Act §303(d) List

EPA letter to the Louisiana Department of Environmental Quality (1 p, 53 KB, About PDF)
Federal Register Notice (4 pp, 84 KB About PDF)
Record of Decision (16 pp, 98 KB About PDF)
Responsiveness Summary (9 pp, 76 KB About PDF)

Final Action on the State of Louisiana’s 2010 Clean Water Act §303(d) List

EPA letter to the Louisiana Department of Environmental Quality (1 pp, 285 KB, About PDF)
Federal Register Notice Responsiveness Summary (19 pp, 135 KB, About PDF)

Final Action on the State of Louisiana’s 2008 Clean Water Act §303(d) List

EPA letter to the Louisiana Department of Environmental Quality (1 pp, 277 KB, About PDF)
Federal Register Notice Responsiveness Summary (12 pp, 534 KB, About PDF)

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