CONTAMINATION OF GROUND WATERS

A NATIONAL LOOK AT NITRATE CONTAMINATION OF GROUND WATER

By Bernard T. Nolan, Barbara C. Ruddy, Kerie J. Hitt, and Dennis R. Helsel

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Table 1

aNitrogen loading refers to nitrogen inputs from inorganic fertilizer, animal manure, and atmospheric deposition.
^bPopulation density is used to indicate additional nonagricultural sources of nitrogen such as residential fertilizers, septic systems, and domestic animals.

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U.S. Department of the Interior, U.S. Geological Survey
Maintainer: Kerie Hitt (kjhitt@usgs.gov)
Last update: 17:47:56 Mon 09 Jul 2001
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