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The U.S. Geological Survey (USGS), in cooperation with the U.S. Fish and Wildlife Service (USFWS) and the U.S. Environmental Protection Agency (EPA), identified the occurrence of contaminants of emerging concern (CECs) in water and bottom sediment collected in 2013 at 57 sites throughout the Great Lakes Basin. The 2013 effort is part of a long-term study that began in 2010. Included in this directory are references to or descriptions of analytical methods used, collection methods, environmental data, and associated quality-assurance data for samples collected in 2013. Samples were collected from April through October 2013 by USGS, USFWS, and/or EPA personnel. Study sites include tributaries to the Great Lakes...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Area of Concern,
Area of Concern,
Emerging Contaminants,
Emerging Contaminants,
Great Lakes, All tags...
Great Lakes Area of Concern,
Great Lakes Restoration Initiative,
Great Lakes Restoration Initiative,
Toxicology,
Toxicology,
USGS Science Data Catalog (SDC),
Water Quality, Fewer tags
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This study examined the spatial and temporal trends of mercury (Hg) in wet deposition and air concentrations in the United States (U.S.) and Canada between 1997 and 2013. Data were obtained from the National Atmospheric Deposition Program (NADP) and Environment Canada monitoring networks, and other sources. Of the 19 sites with data records from 1997-2013, 53% had significant negative trends in Hg concentration in wet deposition, while no sites had significant positive trends, which is in general agreement with earlier studies that considered NADP data up until about 2010. However, for the time period 2007-2013 (71 sites), 17% and 13% of the sites had significant positive and negative trends, respectively, and for...
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Several quality-control measures were implemented both in the field and at the laboratory to evaluate the integrity of the data being generated. Sample replicates and blank samples were collected in the field. Surrogate standards, isotope dilution standards, matrix spikes, reagent blank-water spikes, and reagent blank-sediment samples were prepared in the laboratory. Quality control measures used in 2013 were similar to those used in previous years of the study. Detailed descriptions and how the quality-assurance data are used can be found in Lee and others (2012) for data collected in 2010-11 and in Lee and others (2015) for data collected in 2012 for the same study. References: Lee, K.E., Langer,...
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This directory provides analytical results for wastewater compounds, steroid hormones, sterols, and bisphenol A, and pharmaceuticals in water and wastewater compounds, steroid hormones, sterols, and bisphenol A, pharmaceuticals, and antidepressants in bottom-sediment samples collected during 2013. In addition, a comparison of data obtained for compounds determined by pharmaceutical methods 8244 and 2440 is provided. Data provided are as reported by the laboratory, unless otherwise noted, and listed by sample. "2013Data_by_Result.xlsx" provides all environmental data included in "2013WaterData" and "2013SedimentData", listed by compound. Discussion of number of detections does not include results that were 'v' or...
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Collection Methods Methods used to collect environmental samples in 2013 followed methods used in previous years of the study and are provided in detail in Lee and others (2012) for data collected in 2010/11 and in Lee and others (2015) for data collected in 2012 for the same study. Briefly, water samples were collected from streams and lakes using a modified depth-integrated sampling method with a weighted bottle sampler fitted with a 1-liter, glass bottle. Bottom-sediment samples were collected to include the most recently deposited bottom-sediment deposition (top 10 centimeters) using a stainless steel Ekman dredge. All samples were collected with inert materials and sampling personnel avoided the use of personal-care...
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