USGS Scientific Investigations Report 2012–5253
Groundwater Quality and the Relation Between pH Values and Occurrence of Trace Elements and Radionuclides 
in Water Samples Collected from Private Wells in Part of the Kickapoo Tribe of Oklahoma Jurisdictional Area, 
Central Oklahoma, 2011

First posted January 24, 2013

Revised March 5, 2013

Page 24, figure 9: Water types were determined to be incorrect for several data points in graphs of barium 
concentration and nickel concentration compared to pH of water samples; these data points have been changed 
from mixed cation water type to sodium-bicarbonate water type. 


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