The survey results indicate that 56 percent of the nation’s lakes
support healthy biological communities. The report identifies poor
lakeshore habitat conditions and high levels of nutrients as widespread
stressors impacting lake water quality in the United States. The
National Lakes Assessment (NLA) is the latest in a series of surveys of
the nation’s aquatic resources being conducted by EPA and its state and
tribal partners.
 
This draft report is available for public review and comment at:
www.epa.gov/lakessurvey 
 
(direct link: http://www.epa.gov/lakessurvey/pdf/nla_report_low_res.pdf ).