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

"September, 1981."

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 and water quality survey of the Carroll Creek Watershed, Carroll County, Illinois, 1987-1988.

"IEPA/WPC/89-163."--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."

Biological and water quality survey of the Vermilion River Vermilion County, Illinois, 1994 /

"May 1995."

Blue Creek watershed project : Pike County, Illinois, May, 1979-October, 1980 /

"October, 1981."

Blue Creek watershed project : executive summary and recommendations /

IEPA/WPC/84-008.

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.

Clean Lakes Program phase I diagnostic / feasibility study of Douglas Park Lagoon, Garfield Park Lagoon, Lincoln Park North Pond, Washington Park Lagoon : Chicago Park District, Cook County, Illinois /

"This report was financed in part by a grant from the U.S. Environmental Protection Agency under section 314 of the Clean Water Act."