Posts tagged national rivers and streams assessment.

The U.S. EPA has issued for public comment a draft of its most recent National Rivers and Streams Assessment (NRSA). The Assessment involved sampling over 1,900 points along wadeable waterways in the contiguous 48 States during 2008 and 2009, and updates a similar study done in 2004. Comments must be emailed to by 11:59 p.m. May 9, 2013.

Among the key findings: 55% of the nation's river and stream miles do not support healthy populations of aquatic life, with phosphorus and nitrogen pollution and poor habitat the most widespread problems. An additional 23% of river and ...

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