Illinois annual air quality report.

Mode of access: Internet.

Illinois reasonable further progress report for 1985 : ozone and carbon monoxide.

"September, 1986."

Illinois reasonable further progress report for 1986 : ozone and carbon monoxide.

"September, 1987."

Illinois water quality report /

Mode of access: Internet.

Illinois water quality report.

Latest issue consulted: 2002.

Illinois water data catalog report /

"IEPA/WPC/85-007."-- Cover.

Lake water quality assessment program : northeastern Illinois lakes /

"The Northeastern Illinois Planning Commission's Natural Resources Dept. conducted the lake assessment data collection effort for the six county northeastern Illinois region." -- P. iii.

Lake water quality assessment program, 1993 : northeastern Illinois lakes /

"January 1995."

Lake Education Assistance Program (LEAP) /

"December 2000"--P. [4]

Lake Education Assistance Program application package /

"IEPA/BOW/98-012."

Leaking underground storage tank manual.

"IEPA/LPC/91-203."

Regional pol[l]ution control facility siting in Illinois : second report.

"October, 1990."

Report on activities under the Solid Waste Management Act (P.A. 84-1319) /

"December, 1992."

Soil erosion and sediment delivery in the Highland Silver Lake Watershed, Madison County, Illinois : preliminary analysis /

"October, 1982."

Soil erosion and sediment transport dynamics in the Blue Creek Watershed, Pike County, Illinois /

"IEPA/WPC/83-004."