National Water-Quality Assessment (NAWQA) Program

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Water Quality in Carbonate Aquifers in the United States

The Report Summary of Findings Study Design
The Report:
Scientific Investigations Report 2008-5240

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While available, copies of this report can be obtained by contacting the Pennsylvania Water Science Center at (717) 730-6946 or by e-mail at jbricker@usgs.gov

Atrazine concentrations by principal aquifer

Atrazine was detected very frequently, but never exceeded the Maximum Contaminant Level (MCL) of 3 micrograms per liter. Only 4 percent of the samples for atrazine exceeded 10 percent of the MCL; most of these cases were in agricultural areas. The illustration shown is based upon figure 27 of SIR 2008-5240.

figure27

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Page Last Modified: Thursday, 25-Jun-2009 13:46:19 EDT