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Figure 10: Environmental Protection Agency's index of watershed indicators (source: EPAweb site www.epa.gov/surf3/states/LA/).
Environmental Protection Agency's index of watershed indicators.

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Coastal & Marine Geology Program > Center for Coastal & Regional Marine Studies > Environmental Atlas of Lake Pontchartrain
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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2002/of02-206/env-overview/water-quality-fig9.html
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