LOCATION.-- Lat 41°58'39", long 88°11'39" (NAD of 1927), in SE1/4NE1/4SW1/4 sec. 3 T.40 N., R.9 E., Hydrologic Unit 07120006, Well 5 (Illinois Environmental Protection Agency 20613), within Bartlett. Owner: Village of Bartlett.

AQUIFER.-- Dolomite of Silurian age and Maquoketa Group of Ordovician age.

WELL CHARACTERISTICS.-- diameter 15.2 in., depth 392 ft, cased to 155 ft, open hole, drilled, public supply.

PERIOD OF RECORD.--

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