Environmental Sciences

Environmental Sciences Experts

Jeffrey Frey

Water Science
The U.S. Geological Survey
United States Virgin Islands


Jeff received his B.S. from the University of Minnesota in Environmental Studies in 1986 and his M.S. from the Indiana University School of Public and Environmental Affairs in 1992. He began working with the USGS after graduate school in Indiana with the National Water-Quality Assessment (NAWQA) Program and has held several positions since then. Currently, he is the Indiana Deputy Director of the USGS Indiana-Kentucky Water Science Center in Indianapolis. Other non-USGS work highlights includes working with Peace Corps in Cameroon teaching inland fisheries (1986-88) and as an observer with the National Marine Fisheries Service off of Alaska (1990).

Research Interest

transport of and biological response to nutrients


  • Identifying nutrient reference sites in nutrient-enriched regions-Using algal, invertebrate, and fish-community measures to identify stressor-breakpoint thresholds in Indiana rivers and streams, 2005-9

  • Stream sediment sources in midwest agricultural basins with land retirement along channel

  • High nitrate concentrations in some Midwest United States streams in 2013 after the 2012 drought

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