This dataset contains results for samples collected at stormwater basins across the United States to assess the potential contaminant pathways of these basins to surface water and groundwater. Sample sites were in stormwater conveyance infrastructure that discharged mixed stormwater runoff from buildings, parking lots, roads, and other infrastructure in residential, commercial, and industrial landscapes prior to surface-water discharge or groundwater infiltration. Stormwater basins draining various types of urban environments, and of various drainage areas, were selected and sampled during storm events. The associated report (Masoner and others, 2019) can be found at https://doi.org/10.1021/acs.est.9b02867. A total of 438 organic compounds were analyzed including biogenic hormones, halogenated chemicals, household/industrial chemicals, methylmercury, pesticides, pharmaceuticals, and semi-volatiles. Additionally, 62 inorganic constituents were collected including cations and anions, rare-earth elements, trace elements and mercury. Rare-earth element and inorganic constituent data can be found in Jaeschke and others, 2018 and Keefe and others, 2018 (citations included in Cross Reference section of this metadata record). Concentration results and land-use descriptions are presented within.