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Changes in Nutrient and Sediment Concentrations in Streams and Rivers of the United States, 1993-2003

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Changes in total phosphorus concentrations

Phosphorus concentrations remained stable from 1993 to 2003 in 60 percent and increased in 24 percent of the 171 streams assessed. Phosphorus concentrations increased by more than 50 percent in about 16 percent of the streams.

NFA-TP

 

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