LOCATION.-- Lat 42°06'08", long 89°50'14" (NAD of 1927), in NE1/4NW1/4SW1/4 sec. 5, T.24 N., R.6 E., Hydrologic Unit 07060005, Well 4 (Illinois Environmental Protection Agency 11707), within Lanark. Owner: City of Lanark.

AQUIFER.-- Dolomite and sandstone of Ordovician and Cambrian age.

WELL CHARACTERISTICS.-- Diameter 14 in., depth 1,082 ft, cased to 315 ft, open hole, drilled, public supply.

PERIOD OF RECORD.--

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