Illinois environmental education resource guide : west central region /

"Fall 2000."

Illinois EPA sludge regulation guidance document.

"Authors: James J. Janssen and S. Alan Keller." -- Bibliographic data sheet.

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

Mode of access: Internet.

Illinois environmental emergency contact directory.

Cover title.

Illinois Landsat feasibility study /

Prepared for the Institute of Natural Resources by John Bishop in cooperation with the Dept. of Local Government Affairs and Illinois Environmental Protection Agency.

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

"September, 1986."

Illinois recommended standards for sewage works /

Effective March 31, l980.

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

"September, 1987."

Illinois solid waste management legislation.

"April 1996."

Illinois state implementation plan for air pollution control : 1982 plan revision for ozone and carbon monoxide.

A revision of vol. 5 of the 1979 plan.

Illinois water monitoring strategy, 2007-2012.

"IEPA/BOW/07-005."--Cover.

Illinois water quality report /

Mode of access: Internet.

Illinois water quality report.

Latest issue consulted: 2002.

Illinois Volunteer Lake Monitoring Program newsletter.

Description based on: Sept. 1990; title from caption.

Illinois water quality inventory report.

Mode of access: Internet.