Upper Midwest Environmental Sciences Center
Contaminants in Mississippi River suspended sediment:
Sampling Purpose: The Wisconsin Department of Natural Resources (WDNR) deployed glass sediment traps in the Upper Mississippi (Pools 1-4), Minnesota, and St. Croix Rivers to collect composite samples of suspended sediment between 1987 and 1994. The objectives of this study were to assess the contaminant concentrations of suspended sediment, evaluate factors influencing contaminant concentrations, and assess temporal trends and compare contaminant concentrations in suspended sediments to recent contaminant investigations on the river. Samples were analyzed for volatile matter, organic carbon, total nitrogen, metals, and polychlorinated biphenyls. Note: Total nitrogen and some ammonia-nitrogen data should be treated as estimates only. As stated in the WDNR report, the holding time for ammonia-nitrogen was exceeded and there were problems with spike recoveries on several total nitrogen samples.
Number of Observations (samples) in Data Set: 55
Institution Providing Data: Wisconsin Department of Natural Resources
Data Set No. 22:
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Data source variables
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Sample variables
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Classes of Contaminants (in both data set 22 and other data sets)
Inorganic contaminants:
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Metals, metalloids, nutrients and others
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Organic contaminants:
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Polychlorinated biphenyls (PCBs)
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Content manager: Michelle Bartsch
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/data_library/sediments_contaminants/datasets/22.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
January 29, 2016
