Groundwater withdrawals from aquifers in Illinois with emphasis on PWS wells /

Bibliography: p. 25-26.

Illinois annual air quality report.

Mode of access: Internet.

Illinois environmental emergency contact directory.

Cover title.

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.

Inventory of the pollution of Des Plaines River and tributaries (excluding Salt Creek) from Cook-Will County line to Wisconsin state line and recommendations for abatement and prevention of pollution /

Lithographed; printed by the Peoria photopress.

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."

Limnology of Cedar Lake, Lake County, Illinois : May-October, 1979.

Cover title.

Limnology of Johnson Sauk Trail Lake, Henry County, Illinois : June-October, 1979.

Cover title.

Limnology of Lincoln Trail Lake, Clark County, Illinois : May-October, 1979.

Cover title.

Limnology of Long Lake, Lake County, Illinois : May-October, 1979.

Cover title.