EPA began planning this study in 1998 and published study results for the following conventional pollutants in 2009: In 2008, EPA began a two-year statistical survey of the condition of flowing waters in the United States. More information about the NRSA ecological assessment.The National Rivers and Streams Assessment (NRSA) was designed to meet the following objectives: The core indicators for this survey (for example, water chemistry measurements, physical habitat assessment, and characterization of benthic macroinvertebrate and fish assemblages) provided data for an ecological assessment of U. The 2008-09 NRSA included additional studies to assess potential impacts to human health.
EPA’s Office of Water joined with the Great Lakes National Program Office (GLNPO) and the Office of Research and Development (ORD) to conduct this human health fish tissue study, which provided important new fish tissue data for the Great Lakes, including: Sampling locations for this study were selected from nearshore areas of U. A statistically representative subset of 157 sites distributed throughout the U. nearshore zone in the five Great Lakes (about 30 sites per lake) were sampled for the Great Lakes Human Health Fish Tissue Study.
Top of Page Field crews collected fish samples from each of the 157 nearshore Great Lakes sampling locations using various gear (for example, gill nets or hook and line).
EPA collaborated with federal agencies, states and other partners to conduct a series of fish contamination studies.
These studies provide data on concentrations of a variety of chemicals in fish tissue.
EPA conducted special studies in the Great Lakes under the NCCA in addition to the core ecological assessment.
One of these studies, referred to as the Great Lakes Human Health Fish Tissue Study, added a human health component to the NCCA in the Great Lakes. The nearshore zone in the Great Lakes was defined as the region from the shoreline to a depth of 30 meters or to a distance of 5 kilometers in shallower waters of the Great Lakes.
All the while they have to keep their skin wet to enable oxygen absorption.
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You can also skip the background information on these studies and view their results and data, as well as data from other fish tissue collection efforts.
See: Fish Tissue Data Collected by EPA This study was the first statistically‐based freshwater fish contamination study conducted on a national level.
Five fillet tissue aliquots were prepared from each fish sample for distribution to analytical laboratories for chemical analysis and one or more additional aliquots were retained for long-term tissue archive.