LOCATION.-- Lat 41°43'20", long 89°20'13" (NAD of 1927), in SW1/4SE1/4NW1/4 sec. 15, T.20 N., R.10 E., Hydrologic Unit 07090007, Well 4 (Illinois Environmental Protection Agency 00602), within Amboy. Owner: City of Amboy.

AQUIFER.-- Ancell Group of Ordovician age through Ironton and (or) Galesville Sandstones of Cambrian age.

WELL CHARACTERISTICS.-- Diameter unrecorded, depth 1,115 ft, cased to 280 ft, open hole, drilled, public supply.

PERIOD OF RECORD.--

GROUND-WATER QUALITY: November 2001.