3E Company, Inc.

A2A S.p.A.
ABEnergy Ltd
ACEA S.p.A.
Addax Petroleum
AEA Technology plc
AES SeaWest, Inc.
AGL Energy Limited
Alkane Energy plc
ALLETE, Inc. [ALE]
Alliant Energy Corporation [LNT]
Alternate Energy Corp. [ARGY.PK]
AMEC Earth & Environmental Limited
Ameren Corporation [AEE]
American Labelmark Company
Analytical Services, Inc.
Aqua-Pure Ventures Inc.
AquaCell Technologies, Inc. [AQUA.PK]
Aquilex Corporation
ATCO Ltd. [ACLLF.PK]
Avista Corporation [AVA]
AWTP, LLC

Baden Technologies Inc.
BBJ Environmental Technologies, Inc. [BBJE.PK]
Beacon Industrial Group, Inc.
BIOQUELL Plc
Blue Vista Technologies Inc. [BVTNF.PK]

Caithness Corporation
Canadian Utilities Limited [CDUAF.PK]
Carbtrol Corporation
Catalytic Combustion Corporation
Catamount Energy Corporation
Celeren Corporation
CenterPoint Energy, Inc. [CNP]
Central Locating Service, Ltd.
CH Energy Group, Inc. [CHG]
CHOICE! Energy Services Retail, L.P.
City Gas Pte Ltd
Clearford Industries Inc.
Clyde Bergemann EEC
CMS Energy Corporation [CMS]
CMS Enterprises Company
Commerce Energy Group, Inc. [EGR]
Community Energy, Inc.
Compact Power Holdings plc
Consolidated Edison, Inc. [ED]
Culligan International Company
CUNO Incorporated

Dalkia plc
Dürr Environmental, Inc.
Decatur Utilities
Denali Incorporated
domnick hunter group
DPL Inc. [DPL]

eaga plc
Ecovation, Inc.
EDF Energies Nouvelles S.A.
EIP Associates
Enerchina Holdings Limited
ENTECH, Inc.
Enterprise Group Holdings Limited
ENVIRON Holdings, Inc.
Environmental Waste Controls ltd
Ergon, Inc.
EVN AG [EVNVY.PK]
Exelon Corporation [EXC]
Exelon Energy Company

F.B. Leopold Company, Inc.
First Wind Holdings, Inc.
Florida Public Utilities Company [FPU]

GDF SUEZ [GDFZY.PK]
Geocon Group, Inc.
Geomatrix Consultants, Inc.
GeoSyntec Consultants, Inc.
Global Energy, Inc.
Global Environmental Energy Corporation [GEECF.OB]
Global Water Resources, Inc.
Golden Grain Energy, LLC
Graver Technologies, Inc.
GridSense Systems Inc. [GRDJF.PK]
GS Holdings Corp.
Gulfmark Energy, Inc.

H2O Innovation (2000) Inc.
Hargis + Associates, Inc.
HELIX Environmental Planning, Inc.
Hunter Manufacturing Company
Hydranautics
HydroChem Industrial Services, Inc.

IBERDROLA RENOVABLES, S.A.
INEO Group
Infiltrator Systems Inc.
Integrys Energy Group, Inc. [TEG]

LifeSource Water Systems, Inc.
Lindmark Engineering
Loubac Top Environmental Inc.

Marsulex Inc.
MEC Analytical Systems, Inc.
MGE Energy, Inc. [MGEE]
Microgenix Technologies Ltd.
MidAmerican Energy Holdings Company
Mintie Corporation
Mirant Corporation [MIR]
MXenergy Inc.

n.v. Nuon
Navitas Energy, Inc.
NiSource Energy Partners, L.P.
NiSource Inc. [NI]
Noble Environmental Power, Inc.
NORESCO
North Wind, Inc.
Northeast Utilities [NU]
Northeast Utilities Service Company
NorthWestern Corporation [NWE]
Nuclear Management Company

Ohio Pure Water Company
Organic Resource Management Inc.
Orival, Inc.
Ozocan Corporation

Pall Aeropower Corporation
PerLorica Inc.
PG&E Corporation [PCG]
PipeHawk PLC
Plambeck Neue Energien AG
PNM Resources, Inc. [PNM]
Porvair plc
Protec, Inc.
PSEG Global L.L.C.
Public Service Electric and Gas Company
Public Service Enterprise Group Incorporated [PEG]

ReliOn, Inc.
RMT, Inc.

Salamander Energy PLC
Séché Environnement SA
Séchilienne-Sidec
SCANA Corporation [SCG]
Sea Breeze Power Corp.
SembCorp Industries Ltd
Seprotech Systems Incorporated
Shell International Renewables
Siemens Water Technologies
Sierra Pacific Resources [SRP]
SM&P Utility Resources, Inc.
Steril-Aire, Inc.
SUEZ Energy International
SUEZ Energy North America, Inc.
SUEZ Environnement
SUEZ-TRACTEBEL S.A.
Summerleaze Ltd
Summit Energy Services, Inc.

Techem AG
Terranext, LLC
TestAmerica Laboratories, Inc.
Theolia
Thermal Energy International Inc.
Tracer Environmental Sciences & Technologies, Inc.
Trojan Technologies Inc.
TurboSonic Technologies, Inc. [TSTA.OB]

U.S. Energy Systems, Inc. [USEYQ.PK]
UGI Corporation [UGI]
United Air Specialists, Inc.
United Pumping Service Inc.
United Site Services, Inc.
Unitil Corporation [UTL]
USDA Forest Service

Vectren Corporation [VVC]
Veolia Environmental Services Plc

Wahlco, Inc.
WEDECO AG Water Technology
Westar Energy, Inc. [WR]
Western Filter Corporation
Westinghouse Electric Company LLC
Wheelabrator Technologies Inc.
Wisconsin Energy Corporation [WEC]

ZCL Composites Inc.
Zephyr Environmental Corporation
Zodiac Marine & Pool