USGS Michigan Water Science Center

Michigan Lakes: An Assessment of Water Quality

In cooperation with Michigan Department of Environmental Quality

By: R. J. Minnerick

US Geological Survey Fact Sheet 2004-3048

Portable Document format (pdf) at
Print-Optimized PDF file (407 K Bytes)

If you do not have Adobe Acrobat Reader, then you can download it for free at:
Use of this software product does not imply endorsement by U.S. Government.


Michigan has more than 11,000 inland lakes, that provide countless recreational opportunities and are an important resource that makes tourism and recreation a $15-billion-dollar per-year industry in the State (Stynes, 2002). Knowledge of the water-quality characteristics of inland lakes is essential for the current and future management of these resources.

Historically the U. S. Geological Survey (USGS) and the Michigan Department of Environmental Quality (MDEQ) jointly have monitored water quality in Michigan's lakes and rivers. During the 1990's, however, funding for surface-water-quality monitoring was reduced greatly. In 1998, the citizens of Michigan passed the Clean Michigan Initiative to clean up, protect, and enhance Michigan's environmental infrastructure. Because of expanding water-quality-data needs, the MDEQ and the USGS jointly redesigned and implemented the Lake Water-Quality Assessment (LWQA) Monitoring Program (Michigan Department of Environmental Quality, 1997).


Minnerick, R.J., 2004, Michigan Lakes: An Assessment of Water Quality: U.S. Geological Survey Fact Sheet 2004-3048, Date Posted: July 7, 2005, 4 p. []

Document Accessibility: Adobe Systems Incorporated has information about PDFs and the visually impaired. This information provides tools to help make PDF files accessible. These tools convert Adobe PDF documents into HTML or ASCII text, which then can be read by a number of common screen-reading programs that synthesize text as audible speech. In addition, an accessible version of Acrobat Reader 6.0, which contains support for screen readers, is available. These tools and the accessible reader may be obtained free from Adobe at Adobe Access.

For further information, contact:
Jim Nicholas, Director
U.S. Geological Survey
Michigan Water Science Center
6520 Mercantile Way, Suite 5
Lansing, MI 48911-5991
or visit our Web site at:

Back to USGS Michigan Water Science Center Home Page

FirstGov button  Take Pride in America button