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National Results and Regional Highlights - National Lakes Assessment 2012

The National Lakes Assessment (NLA) 2012 report presented the results of the second evaluation of the biological, chemical, physical and recreational condition of lakes in the United States. Since the 2012 report was published, the third and fourth assessments have been conducted. The most recent results are from NLA 2022. View the most recent information here.

National Lakes Assessment 2012 Reports, Highlights, and Data

National Lakes Assessment 2012 Report
National Lakes Assessment 2012 Technical Report
National Lakes Assessment 2012 Fact Sheet
Data from the National Aquatic Resource Surveys - download individual data files from NLA and check for updated data (for example, zooplankton files have been updated since the report was published)
NLA 2012 Datafiles for report (zip) - download all data files used in developing the report (archived data)
National Highlight - Comparing Natural Lakes and Manmade Reservoirs
Regional Highlight - Alaska Lakes Study
Regional Highlight - Mercury in Fish Tissue in the Pacific Northwest