Filters: Tags: Central Coastal California (X) > Types: Map Service (X)

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Dissolved Pesticides in Weekly Water Samples from the NAWQA California Stream Quality Assessment (2017) Dissolved pesticides were measured in weekly water samples from 85 wadeable streams in Central Coastal California over a variable six-week period during March–May, 2017, as part of the California Stream Quality Assessment (CSQA) study conducted by the U.S. Geological Survey's (USGS) Regional Stream-Quality Assessment (RSQA) Project. The 85 streams consisted of 40 urban sites (5–100% urban land in the lower basin), 9 agricultural sites, 24 mixed land-use sites, and 12 undeveloped sites. Water samples were filtered (0.7 micrometers) and analyzed for 253 pesticide compounds by direct-injection liquid chromatography with tandem mass-spectrometry (LC-MS/MS). Two similar LC-MS/MS methods were used: a broad-spectrum (223... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Central California Foothills ecoregion, Central Coastal California, Coastal Mountains ecoregion, NAWQA, All tags... National Water Quality Assessment, USGS Science Data Catalog (SDC), United States, Water Quality, diamide, fungicide, herbicide, insecticide, mixtures, neonicotinoid, pesticide, pesticide degradate, stream, surface water, surface water, water quality, Fewer tags