Annual report.

Report year ends June 30.

Aquifers of Illinois : underground sources of drinking water and non-drinking water /

"September, 1981."

Assessment of nonpoint source impacts on Illinois water quality.

"IEPA/WPC/88-020."

Baseline loadings of nitrogen, phosphorus, and sediments from Illinois watersheds : October 1980 - September 1996 /

The purpose of the report is to evaluate baseline loadings of nutrients and sediment to the Mississippi River and the Ohio River from the state of Illinois and to identify the sources of those loads; also evaluated are baseline loadings of nutrients and sediments to the Illinois River from its tributaries.

Assessment and classification of Illinois lakes /

"Staff report."

Biological Stream Characterization (BSC) : a biological assessment of Illinois stream quality /

"IEPA/WPC/89-275"--Cover.

Biological investigation of Mississippi River central and north central basins, A-01, A-02, and B-01, B-02 /

Bibliography: p. 19-20.

Biological and water quality survey of three tributaries to the Sangamon River : South Fork basin, Mosquito Creek and Long Point Slough, September thru November, 1989 : Staff Report /

"May 1991."

Chemical analysis of surficial sediments from 63 Illinois lakes : summer 1979 /

On cover: Investigations of Illinois surface waters.

Clean lakes strategy for Illinois.

Prepared by Donna F. Sefton.

Clean air newsletter.

Description based on: September, 1991; title from caption.

Clean Water Act section 303(d) list : Illinois submittal for 1998.

"The purpose of this report is to fulfill the requirements set forth in Section 303(d) of the Federal Clean Water Act (CWA) and the Water Quality Planning and Management regulation at 40 CFR Part 130."--P. 1.

Cleaning Illinois : status of the state's hazardous waste cleanup programs.

"Spring 1988."

Cleaning Illinois : status of the state's hazardous waste cleanup programs.

"Spring 1986."

Companies that generate hazardous waste and ship it off site : ... annual report /

Description based on: 1985; title from cover.