{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Lisa Nowell", "hasEmail": "mailto:lhnowell@usgs.gov"}, "description": "Dissolved pesticides were measured in weekly water samples from 85 wadeable streams in Central Coastal California over a variable six-week period during March\u2013May, 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\u2013100% 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 compounds) method in use since 2012 and a newly developed method for 30 new-generation fungicides and diamide and neonicotinoid insecticides. This Data Release provides sampling-site locations, analyte information, concentration data for pesticide compounds in environmental weekly water samples, quality-control data for the new method (to supplement previously published quality control data for the standard method), aquatic-life benchmark and Pesticide Toxicity Index toxicity concentration values that were used to assess potential toxicity, estimates of agricultural and nonagricultural pesticide-use data, and streamflow data for gaged sites, in support of the journal article, \u201cNew-generation pesticides are prevalent in California\u2019s Central Coast streams,\u201d by Sandstrom, M.W., Nowell, L.H., Mahler, B.J., and Van Metre, P.C.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9ADZYQE", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5dbb187ae4b06957974ebfb0.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5dbb187ae4b06957974ebfb0", "keyword": ["2017", "April", "California", "Central California Foothills ecoregion", "Central Coastal California", "Coastal Mountains ecoregion", "March", "May", "NAWQA", "National Water Quality Assessment", "USGS:5dbb187ae4b06957974ebfb0", "United States", "diamide", "fungicide", "herbicide", "insecticide", "mixtures", "neonicotinoid", "pesticide", "pesticide degradate", "spring", "stream", "surface water", "water quality"], "modified": "2021-06-22T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-123.648946, 34.380929, -119.225591, 39.374455", "theme": ["geospatial"], "title": "Dissolved Pesticides in Weekly Water Samples from the NAWQA California Stream Quality Assessment (2017)"}