• Evoqua Water Technologies Corporation
• Ecolab Inc.
• AER Control Systems LLC
• Catalytic Products International Inc.
• Durr Systems Inc.
• Environmental Systems & Services UK Ltd.
• KCH Engineered Systems Inc. (ECS Environmental Solutions)
• The Odournet Holding BV (Sensenet Holding BV)
• Romtec Utilities Inc.
• BioAir Solutions
LLC