{
  "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–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 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, “New-generation pesticides are prevalent in California’s Central Coast streams,” 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)"
}