Economic impact of existing ammonia nitrogen water quality standard, IPCB chapter 3 rule 203(f) /

"July, 1981."

Economic impact of proposed water quality and effluent standard amendments for water in the Sangamon River Basin /

"November 1986."

Elements of a water quality information system for the State of Illinois /

Cover title.

Feasibility of a systematic approach to water quality management in Illinois : annual report of stream/lake classification project /

Pbk.

Geology, hydrogeology, and water quality of the karst regions of southwestern Illinois and Southeastern Missouri /

"33rd annual meeting, April 1999 North-Central section, Geological Society of America" --cover.

Fox River Watershed investigation : Stratton Dam to the Illinois River, phase II : hydrologic and water quality simulation models, part 1, methodology and procedure for development of HSPF models /

"May 2007"--T.p.

Fox River Watershed investigation : Stratton Dam to the Illinois River, Phase II : hydrologic models and water quality simulation models, part 2 : Blackberry and Poplar Creek HSPF models, calibration and initial simulation results /

"June 2007."

Fox River Watershed Investigation : Stratton Dam to the Illinois River : Phase II : Blackberry Creek and Poplar Creek hydrologic and water quality simulation models : executive summary.

"June 2007."

Fox River watershed investigation, Stratton Dam to the Illinois River : water quality issues and data report to the Fox River Study Group, Inc. /

CD-ROM includes corresponding database and GIS datasets.

Illinois Conference on Soil Conservation and Water Quality : conference proceedings of November 9-10, 1983 at Holiday Inn East, Springfield, Illinois /

Includes bibliographical references.

Illinois Environmental Protection Agency responsiveness summary for : Sugar Creek Impoundment : Section 401 water quality certification for the construction of a water supply reservoir for the city of Marion.

The city of Marion has applied to the Illinois EPA for Section 401 water quality certification to construct a 1,172 surface acre, raw water impoundment reservoir on Sugar Creek, southeast of Creal Springs, Williamson County, Illinois. This proposal and the impacts are described in the Final EIS, DSI, and DSII. The proposed project will involve the construction of a reservoir on Sugar Creek and the mitigation for affected wetlands and jurisdictional waters of the United States.

Illinois integrated water quality report and section 303(d) list ... : water resource assessment information and listing of impaired waters.

Mode of access: Internet.

Illinois water quality report /

Mode of access: Internet.

Illinois water quality report.

Latest issue consulted: 2002.

Illinois water quality inventory report.

Mode of access: Internet.