• Amwell

• BOC Gases

• Bio-Microbics, Inc.

• Bord na Mona

• Carbtrol Corporation

• Construction Design Technologies

• Cromaglass Corporation

• Crystal Fountains

• Diamond Water Systems

• Environment/One Corp.

• F. B. Leopold Co.

• FSD

• Filtronics, Inc.

• Gravity Flow Systems

• Hill Murray: Environmental Systems Engineers

• Incinolet Products

• J W I

• JWC Environmental

• Kemco Systems

• Kinetico

• Komline-Sanderson Ltd

• Lakeside Equipment Corporation

• Link-O-Matic Mfg. Co.

• Ludell Mfg. Co.

• Met-Pro Corporation

• Ondeo Degremont, Inc.

• Parkson Corporation

• Patterson Pump Co.

• Pepcon Systems, a division of American Pacific Corp.

• Purestream

• Robert Oldham Ltd.

• Sancor

• Scienco/Fast Systems

• Smith & Loveless

• Somat Company

• Steamist

• Taylor-Dunn

• The Danis Companies

• U.S. Filter

• Unicel, Inc.

• Vanton Pump & Equipment Corp.

• WESCO Distribution Inc.

• Waterloo Biofilter Systems