LOCATION.-- Lat 42°13'59", long 88°32'32" (NAD of 1927), in NE1/4NE1/4SW1/4 sec. 4, T.43 N., R.6 E., Hydrologic Unit 07090006, Well 4 (Illinois Environmental Protection Agency 00276), within Union. Owner: Village of Union.

AQUIFER.-- Dolomite? and St. Peter Sandstone of Ordovician age.

WELL CHARACTERISTICS.-- Diameter 10 to 12 in., cased to 133 ft, open hole, drilled, public supply.

PERIOD OF RECORD.--

GROUND-WATER QUALITY: August 1986 (see Voelker and others, 1987); May 2002.