National Water-Quality Assessment (NAWQA) Project

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sampling the Missouri River at Hermann, Missouri; July 2011 - Photo by Kelly Brady, USGS
U.S. Geological Survey personnel collecting a water quality sample at the Missouri River at Hermann, Missouri in July, 2011. Photo by Kelly Brady, USGS

Nitrate in the Mississippi River and its tributaries, 1980 to 2010: Are we making progress?

Trends in Nitrate from 1980-2010

image map

Nitrate Trends (1980-2010)

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