| 3M |
Enverity Corp. |
Parsons Corp. |
| Acttiv (Pty) Ltd. |
Enviance, Inc. |
PerkinElmer Inc. |
| ADA Technologies Inc. |
Environmental Control Industries |
Precision Sampling Inc. |
| Aerodyne Research Inc. |
Environmental Data Solutions Group |
Risk Management Technologies |
| Aerotech Laboratories Inc. |
Environmental Support Solutions Inc. |
Rupprecht and Patashnick Co. |
| Agilent Technologies Inc. |
Environmental Support Technologies |
Scientific Software Inc. |
| Alamo Water Refiners Inc. |
Enviroware |
Selerant |
| American Ecology Corp. |
ESRI |
Sensus Metering Systems Inc. |
| American Society for Testing and Materials |
ESS |
Shimadzu Scientific Instruments Inc. |
| Americas Clean Water Foundation |
Foster Miller Inc. |
Siemens |
| Applied Biosystems Group |
Fugro Geosciences Inc. |
SoftRisk Technologies Inc. |
| Aqua America |
GEHM Environmental Corp. |
Spectrum Geophysics |
| ARCADIS |
GemTeck Environmental Software Ltd. |
Stablex |
| Aspen Technology Inc. |
Geoinsight |
Strategic Diagnostics Inc. |
| AutoDesk |
Haestad Methods Inc. |
Strategic Directions International |
| Badger Meter Inc. |
IDC Corp |
SustaiNet Software Solutions Inc. |
| Bentley Systems Inc. |
idocuments |
TechniData |
| Blackhawk Geosciences |
IFS |
Tekran Inc. |
| BNA |
Industrial Monitoring and Control Corp. |
Terralink Software Systems Inc. |
| Boreal Lasers |
International Water Association |
Terraplus USA |
| Cerex Environmental |
LaMotte Co. |
Thermo Electron Corp. |
| CH2M HILL |
Malcolm Pirnie |
TSI Instruments Inc. |
| ChemADVISOR Inc. |
Marshall Environmental Group Inc. |
URS Corp. |
| Columbia Technologies LLC |
Marsulex Inc. |
Varian Inc. |
| CUNO Inc. |
McIlvaine Co., The |
Veridium Corp. |
| Digilab LLC |
Metrix Software Solutions (Pty) Ltd. |
Versar Corp. |
| Dionex Corp. |
MicroSafe B.V. |
VOC Technologies Inc. |
| Donley Technologies Inc. |
Millipore |
Watts Water Technologies Inc. |
| Earth Dynamics Inc. |
Neptune Meter Co. |
Weston Solutions, Trinity Consultants |
| Electromagnetic Instruments Inc. |
North Country Environmental Services |
YSI Environmental |
| Enterprise Partners Venture Capital |
NovAseptic AB |
ZAPS Technologies Inc. |