#
#  FILE_NAME: 		Archival_Summary
#  DATASET_DESCRIPTION:	This data set is a compilation of water-quality data for drinking-water wells
#			(public supply and domestic) in the Glacial Aquifer System of 12 Midwestern 
#			states. The data were obtained from state agencies in Illinois, Indiana, Iowa,
#			Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South
#			Dakota, and Wisconsin. The data set contains results for selected analytes
#			(and associated analytes) determined to be of interest by the Principal Aquifer
#			Synthesis Team that worked on the Glacial Aquifer System.
#			 
#
#			An excerpt of this data set was used in a side-bar illustration in the Circular 
#			on the Glacial Aquifer System (Warner and Ayotte, in press, 2012) to demonstrate 
#			how data from drinking water wells from state agencies compared to results obtained 
#			from the NAWQA Program wells.
#
#			WARNING! These data originate from sources other than the USGS.
#
#
#			WARNING! These data contain coordinate information considered to be private
#				and confidential by some of the data sources. These data are for
#				NAWQA internal purposes only. If data are used otherwise, the coordinate
#				information should be removed!
#			
#			
#
#  DATA_SET FORMAT:	Tab-delimited ascii file
#  DATA_SET URL:        http://water.usgs.gov/nawqa-only/aq/data_archive/Glacial_sdw_data.zip
#
#-------------------------------------------------------------------------------------------------------- 
#  REPORT TITLE: 		Selected Water-Quality Data from Drinking Water Wells in the Glacial 
#				Aquifer System of 12 Midwestern States, United States
#  REPORT SERIES/NUMBER:	USGS Open-File Report (OFR 2012-###)     
#  REPORT URL:          	http://pubs.usgs.gov/ofr/2012/###/
#
#-------------------------------------------------------------------------------------------------------
#  NAWQA STUDY:		Principal Aquifer: Glacial Aquifer System
#
#-------------------------------------------------------------------------------------------------------
#
#  METADATA DATE:    	September 25, 2012
#  METADATA CONTACT: 	John Wilson
#                    	USGS-WRD, Indiana Water Science Center 
#                    	5957 Lakeside Boulevard
#	 	     	Indianapolis, IN 46278	
#                    	voice: (317) 600-2752
#                    	fax:   (317) 290-3313
#                    	email:  jtwilson@usgs.gov
#
#  SECONDARY CONTACT:   Kelly Warner, Principal Aquifer Lead Scientist for Glacial Aquifer System, Cambrian-
#				      Ordovician Aquifer system, and New England Crystalline Aquifers 
#                    	USGS-WRD, Illinois Water Science Center 
#                       1201 West University Avenue, Suite 100       
#                       Urbana, IL 61801	
#                    	voice: (217) 328-9727
#                    	fax:   (217) 344-0082
#                    	email:  klwarner@usgs.gov
#-
# ----------------------------------------------------------------------------------------------------------
#  REPORT ARCHIVAL DATA SET: glacial_aquifer_system_state_drinking_water_data.txt
#
#   		This data set contains groundwater-quality data from multiple state sources (non-USGS) for 
#		selected physical properties, major ions, trace elements, nutrients, and radionuclides
#		for wells completed in the Glacial Aquifer System of 12 Midwestern states. 
#		These data are a subset of a larger data compilation for all states within the boundary
#		of the Glacial Aquifer System. Time limitations did not allow for the editing and formatting
#		of data from all states within the Glacial Aquifer System. The 12 Midwestern states were 
#		selected as a trial or pilot for formatting the data for use in future studies of the
#		aquifer system. 
#		 		
#		The data will be used to characterize the water quality of the Glacial Aquifer System 
#		as part of the U.S. Geological Survey, National Water-Quality Assessment (NAWQA) Program. 
#		Analysis of the data can be compared with results based on NAWQA wells, many of which are
#		observation wells used to study land use effects and do not directly represent the drinking
#		water resource. 
#		    
#		Sample dates range as far back as 1946 to as recent as 2011, but most (98%) sample dates
#		are from the 1980s or more recent. The distribution of sample dates is shown 
#		below:
#				Date	Count	Percent
#				-----	-----	-------
#				1940s	1	0.01
#				1950s	3	0.03
#				1960s	58	 0.6
#				1970s	136	 1.4
#				1980s	1,172	12.3
#				1990s	1,989	20.8
#				2000s	5,772	60.4
#				2010s	425	 4.4
#				-----------------------
#
#		Constituent concentrations are assumed to be for unfiltered samples, except for total dissolved
#		solids. The exception to this assumption are data from the Indiana Department of Environmental
#		Management, whose samples are filtered, and therefore represent dissolved concentrations.
#		
#
#---------------------------------------------------------------------------------------------------------------
END