Dana Kolpin, a research hydrologist with the USGS Iowa Water Science Center in Iowa City, IA

From the U.S. Geological Survey (USGS):

#SciSelfieSunday — Meet Dana Kolpin, a research hydrologist with the USGS Iowa Water Science Center in Iowa City, IA. Dana took a quick moment to snap a#selfie while collecting stream water samples in an heavily agricultural watershed in Old Mans Creek near Iowa City (05455100). Dana is gathering water samples to get a better understanding of what contaminants are present in our Nation's streams which is a vital component to understanding any potential environmental effects resulting from those contaminant exposures.

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