To require the Director of the United States Geological Survey to perform a nationwide survey of perfluorinated compounds, and for other purposes.

PFAS Detection Act of 2018 This bill requires the U.S. Geological Survey (USGS) to establish a performance standard for the detection of perfluorinated compounds. Using such standard, the USGS must carry out a nationwide sampling to determine the concentration of perfluorinated compounds in estuaries, lakes, streams, springs, wells, wetlands, rivers, aquifers, air, and soil. A perfluorinated compound is a perfluoroalkyl substance or a polyfluoroalkyl substance that is manmade with at least one fully fluorinated carbon atom.