Figure 5	
"Trends in the Occurrence of MTBE in Drinking Water Derived from Ground Water in 6 Northeast States, 1993-2006"	

Title:	"Number of public water systems in each of six Northeast States with data on methyl tert-butyl ether in drinking water derved from ground water, from 1993-2006."


Description:	This is a graph of the total number of public water systems with data on MTBE.
	
	
	
Origin of data:	The data were obtained from the full data set of MTBE in drinking water: frozen_data_set_for_both_original_and_new_reports.rdb
	
	
	
Manipulation of data set:	This data was extracted from the full data set by counting the number of unique public water systems with data on MTBE in drinking water by the State in which the system was located.
	
	
	
Other:	
	
	
	
	
