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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts James L Orlando Michelle L Hladik California Water Science Center U.S. Geological Survey Corey J Sanders More... Categories Data (1) Tag Schemes Common geographic areas (2) Tags (with Type=Place ) california (1) sacramento (1) View Results as: JSON ATOM CSV

Pesticide Concentrations Measured in Zooplankton Samples Collected from the Sacramento River and Yolo Bypass, California, 2021 Zooplankton samples were collected at one site upstream of the Yolo Bypass in Northern California, three sites within the Bypass, and at a comparison site on the Sacramento River below the city of Sacramento and analyzed for a large suite of current-use pesticides and degradates. Samples were collected every two weeks from early August 2021 to mid-October 2021. Samples were collected by towing a 150-micron conical plankton net for 5 minutes by boat at each site. In the laboratory, zooplankton samples were filtered through a 63-micrometer sieve to separate the zooplankton and vegetation/detritus from the water. Large sticks, twigs, rocks, and leaves were rinsed with organic free water into the sieve and then discarded.... Categories: Data; Tags: California, Environmental Health, Hydrology, Sacramento, USGS Science Data Catalog (SDC), All tags... Water Quality, Zooplankton, environment, pesticide and herbicide contamination, Fewer tags