USGS Michigan Water Science Center
Arsenic, Nitrate, and Chloride in Groundwater, Oakland County, Michigan
By: Steve Aichele
US Geological Survey Fact Sheet 2004-3120
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Introduction
In 1996, the U.S. Geological Survey (USGS), in cooperation
with the Michigan Department of Environmental Quality (MDEQ) and nine southeast Michigan counties, began a study of the factors controlling arsenic concentrations in drinking water. The early results of this study raised broader concerns in Oakland County about the quality of groundwater in general and drinking water in particular. In response to these concerns, Oakland County worked with the USGS and the Center for Applied Environmental Research at the University of Michigan – Flint (CAER) to study distributions of arsenic, nitrate, and chloride in groundwater, with emphasis on sites where concentrations
of these constituents exceeded the Maximum Contaminant
Levels (MCL’s) and Secondary Maximum Contaminant Levels (SMCL's) set by
the U.S. Environmental Protection Agency (USEPA). The maps
produced for this report are based on historical data compiled
from MDEQ records. This fact sheet is a revision of USGS Fact
Sheet 135-98, "Arsenic, nitrate, and chloride in groundwater
in Oakland County in Oakland County, Michigan" (Aichele and others, 1998) to incorporate revisions to the USEPA MCL for arsenic.
Citation:
U.S. Geological Survey, 2004, Arsenic, Nitrate, and Chloride in Groundwater, Oakland County, Michigan: October 2004, Date Posted: August 3, 2005, Fact Sheet 2004-3120, 6p. [http://pubs.water.usgs.gov/fs-2004-3120]
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For further information, contact:
Jim Nicholas, Director
U.S. Geological Survey
Michigan Water Science Center
6520 Mercantile Way, Suite 5
Lansing, MI 48911-5991
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