Expanded Target-Chemical Analysis Reveals Extensive Mixed-Organic-Contaminant Exposure in U.S. Streams.

ABSTRACT: Surface water from 38 streams nationwide was assessed using 14 target-organic methods (719 compounds). Designed-bioactive anthropogenic contaminants (biocides, pharmaceuticals) comprised 57% of 406 organics detected at least once. The 10 most-frequently detected anthropogenic-organics included eight pesticides (desulfinylfipronil, AMPA, chlorpyrifos, dieldrin, metolachlor, atrazine, CIAT, glyphosate) and two pharmaceuticals (caffeine, metformin) with detection frequencies ranging 66-84% of all sites. Detected contaminant concentrations varied from less than 1 ng L^-1 to greater than 10 μg L^-1, with 77 and 278 having median detected concentrations greater than 100 ng L^-1 and 10 ng L^-1, respectively. Cumulative detections and concentrations ranged 4

SUBMITTER: Bradley PM 

PROVIDER: S-EPMC5695041 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature