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 3. Nitrate concentration in ground water and percent of wells in which the nitrate concentration exceeds the drinking-water standard (10 milligrams per liter) generally decrease with increasing depth to ground water. (Data shown are for the high-risk group.)

Figure 3

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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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