PREFACE

This Water-Data Report of Illinois is one of a series of annual reports that documents hydrologic, biologic, and meteorologic data gathered from the U.S. Geological Survey's data-collection networks in each State, Puerto Rico, and the Trust Territories. These records of surface-water, ground-water, meteorological and biological data provide the hydrologic information needed by Federal, State, and local agencies, and the private sector for developing and managing our Nation's land and water resources.

This report is the culmination of a concerted effort by dedicated personnel of the U.S. Geological Survey who collected, compiled, analyzed, verified, and organized the data, and who typed, edited, and assembled the report. In addition to the authors, the following individuals contributed appreciably to the collection, processing, and tabulation of the data:
 
De Kalb Office Mt. Vernon Office                               Urbana Office
J.W. Angel C.V. Garofolo R.E. Beaulin J.L. Hogan
L.M. Cann T.A. Legg P.G. Dennis G.P. Johnson
S.R. Cutshaw J.C. Maurer P.J. Draper K.K. Johnson
R.T. Kay J.R. Norris J.J. Duncker P.C. Miller
D.L. Schrader D.J. Fazio P.C. Mills
T.L. Wicker G.E. Groschen D.P. Morgan
T.M. Halfar W.S. Morrow
M.L. Harris T.M. Over
  A.D. Robl
  P.J. Terrio
      T.L. Welborn
  M.R. Wilson

Special thanks to Joshua Gioja for writing the software used to compile data for this report and to Elizabeth Weldon for compiling the report.  Thanks to Jennifer Sharpe for making the illustrations for the Introduction.

This report was prepared in cooperation with the State of Illinois and with other agencies under the general supervision of John LaTour, Report Coordinator, and Robert R. Holmes, Jr., Director.

Table of Contents

Introduction

Station Description

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data