{"accessLevel": "public", "bureauCode": ["020:00"], "contactPoint": {"fn": "Steven Paulsen", "hasEmail": "mailto:paulsen.steve@epa.gov"}, "describedBy": "https://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys", "description": "Data are from 1,000 river and stream sites across the conterminous US where consistent biological, chemical, physical and watershed data were gathered.  The sites were selected using a probability survey design so that the results provide inferences to all perennial flowing waters in the lower 48 states. \n\nThis dataset is associated with the following publication:\nOmernik, J., S. Paulsen , M. Weber , and G. Griffith. Regional patterns of total nitrogen concentrations in the National Rivers and Streams Assessment.   JOURNAL OF SOIL AND WATER CONSERVATION. Soil and Water Conservation Society,    71(3): 167-181, (2016).", "distribution": [{"accessURL": "https://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys", "title": "https://www.epa.gov/national-aquatic-resource-surveys/data-national-aquatic-resource-surveys"}], "identifier": "A-7d84-341", "keyword": ["Environmental sampling", "ecoregions", "nitrogen", "nutrients", "water quality", "watersheds"], "license": "https://pasteur.epa.gov/license/sciencehub-license.html", "modified": "2016-08-01", "programCode": ["020:000"], "publisher": {"name": "U.S. EPA Office of Research and Development (ORD)", "subOrganizationOf": {"name": "U.S. Environmental Protection Agency", "subOrganizationOf": {"name": "U.S. Government"}}}, "references": ["https://doi.org/10.2489/jswc.71.3.167"], "rights": null, "title": "National Aquatic Resource Survey Rivers and Streams Data"}