“…PAHs can be produced by human activities and natural processes, including incineration of wastes or forest fires [40]. Phthalate esters are used as plasticizers in manufacturing processes, and phenols are used in the production of pesticides, pharmaceuticals, dyes, plastics, and explosives [40]. Only 9 organic compounds were detected in Las Vegas Bay (site 7), the lowest number detected in the Las Vegas Valley area, but 16 compounds were detected at site 6, upstream from Las Vegas Bay.…”