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Location Folder Show Tree ROOT _ScienceBase Catalog __National Water-Quality Assessment Project ___Regional Stream Quality Assessment Bifenthrin causes trophic cascade and altered insect emergences in mesocosms: implications for small streams Geospatial Database of the Study Boundaries, Sampled Sites, Watersheds, and Riparian Zones for the U.S. Geological Survey Regional Stream Quality Assessment Geospatial database of the study boundary, sampled sites, watersheds, and riparian zones developed for the U.S. Geological Survey Midwest Stream Quality Assessment Geospatial database of the study boundary, sampled sites, watersheds, and riparian zones for U.S. Geological Survey Southeast Stream Quality Assessment Pesticides in Weekly Water Samples from the NAWQA Midwest Stream Quality Assessment (2013) Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Patrick W Moran Washington Water Science Center U.S. Geological Survey Michelle L Hladik Christopher G Ingersoll More... Categories Data (1) Tag Types Place (1) Theme (1) Harvest Set (1) USGS Scientific Topic Keyword (1) Tag Schemes Geographic Names Information System (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV Browse Folder

Sediment chemistry and sediment toxicity in wadable streams across the Midwestern United States, 2013 These data present chemistry and toxicity results from freshwater stream sediments collected from 99 wadable stream sites across eleven states in the Midwestern U.S. as one component of a larger USGS study in the summer of 2013. This data presents a selected suite of chemistry collected at these sites (PAHs, Organochlorines, PCBs, Trace Elements, and current use pesticides) used in calculating a Probable Effect Concentration-Likely Effect Benchmark quotient mixture score for contaminants measured in sediments. The toxicity data presents results of toxicity tests following ASTM and US EPA standard methods for sediment toxicity tests with the amphipod Hyalella azteca (28-d exposure), the midge Chironomus dilutus (10-d),... Categories: Data; Types: Citation; Tags: Illinois, Indiana, Iowa, Kansas, Kentucky, All tags... Michigan, Minnesota, Missouri, Nebraska, Ohio, South Dakota, USGS Science Data Catalog (SDC), Water Quality, Wisconsin, chemistry, invertebrates, monitoring, pesticides, pollution, sediment, toxicity, Fewer tags