USGS

A NATIONAL LOOK AT NITRATE CONTAMINATION OF GROUND WATER

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

Figure 2. Nitrate concentration in shallow ground water (less than 100 feet deep) and percent of wells in which the concentration of nitrate exceeds the drinking-water standard (10 milligrams per liter) generally increase with increasing risk of contamination.

Figure 2

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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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