| 1984 |
Lake
County Public Works - Granwood Park Sewage Treatment Plant |
| 1985 |
Yorkville
- Briston Sanitary District |
| 1986 |
City
of Kankakee |
| 1987 |
Metropolitan
Sanitary District of Greater Chicago |
| 1988 |
Vernon
Hills New Century Treatment Plant - Lake County |
| 1989 |
Village
of Addison |
| 1990 |
Village
of Bloomingdale |
| 1991 |
Greater
Peoria Sanitary and Sewage Disposal District |
| 1992 |
City
of Mount Vernon |
| 1993 |
City
of Pontiac |
| 1994 |
Salt
Creek Sanitary District |
| 1996 |
City
of Moline, South Slope Plant |
| 1997 |
West
Chicago Regional Wastewater Treatment Plant |
| 1998 |
Village
of Addison North Treatment Plant |
| 1999 |
Village
of Streator |
| 2001 |
City
of Moline, North Slope Plant |
| 2002 |
Lincoln
Wastewater Treatment Plant |
| 2004 |
City
of Moline, South Slop Plant |
| 2005 |
American
Bottoms Wastewater Treatment Facility |
| 2006 |
OMI
Inc., Carol Stream |
| 2007 |
Mount
Vernon, EMC |
| 2008 |
Streator
Wastewater Facility |
| 2010 |
Sanitary
District of Decatur |
