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Nutrients in the Nation's Streams and Groundwater – USGS Circular 1350

Published On: 10/5/2010

The USGS has released a new circular showing little improvement or declines in the Nation’s water quality between 1992 through 2004.

 
A comprehensive national analysis of nutrients in streams and groundwater from 1992 through 2004 is provided by the National Water-Quality Assessment (NAWQA) Program of the United States Geological Survey (USGS). Results show that excessive nutrient enrichment is a widespread cause of ecological degradation in streams and that nitrate contamination of groundwater used for drinking water is a continuing human-health concern, particularly in shallow domestic wells in agricultural areas. Despite major Federal, State, and local efforts to control point and non-point sources and transport of nutrients, concentrations of nutrients have remained the same or increased in many streams and aquifers across the Nation since the early 1990s. The USGS circular and a factsheet can be found at http://water.usgs.gov/nawqa/nutrients/pubs/circ1350/.



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