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Illinois Water Science Center Home 		Collection Methods

A major component of the U.S. Geological Survey's National Water Quality Assessment program is to characterize the geographic and seasonal distributions of water-quality conditions in relation to major contaminant sources. For streams, the assessment of trace elements and organic contaminants is accomplished through a two-phase assessment of streambed sediments and tissues of aquatic organisms. For the LIRB, only fish tissue was analyzed.




















Personnel to contact about a specific subject are listed on the staff page.
U.S. Department of the Interior
U.S. Geological Survey
221 North Broadway, Urbana, IL 61801, USA
URL: http://il.water.usgs.gov/proj/lirb/bst/collect_method/index.html
Maintainer: djfazio@usgs.gov
Last modified: 14:36 CST Thurs 11 May 2000