LOCATION.-- Lat 41°32'34", long 87°51'34" (NAD of 1927), in NW1/4NW1/4NE1/4 sec. 9, T.35 N., R.12 E., Hydrologic Unit 07120004, Well 3 (Illinois Environmental Protection Agency 20389), about 1.5 mi northeast of Mokena. Owner: Village of Mokena.

AQUIFER.-- Dolomite of Silurian age.

WELL CHARACTERISTICS.-- Diameter 15 to 19 in., depth 420 ft, cased to 89 ft, open hole, drilled, public supply.

PERIOD OF RECORD.--

GROUND-WATER QUALITY: August 2002.