Regional assessments of the Nation's water quality--Improved understanding of stream nutrient sources through enhanced modeling capabilities
Studies of the sources, transport, and fate of nutrients in the streams of six major regions of the conterminous United States.
U.S. Geological Survey Fact Sheet 2011-3114
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- States or counties
Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming
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