Calgon Carbon Corporation is a manufacturer of activated carbon, with capabilities in ultraviolet light disinfection.
Avista is an energy company involved in the production, transmission, and distribution of energy.
Select Energy Services is a company providing water-management solutions to the oil and gas industry.
Plug Power is a provider of clean hydrogen and zero-emission fuel cell solutions.
Tennant designs, manufactures, and markets floor cleaning equipment.
Tecogen is a next-generation manufacturer of natural-gas-fueled, engine-driven, combined heat and power (CHP) products.
MTS Cleansing Services is a company specializing in liquid waste management.
QS Energy, Inc. provides the global energy industry with industrial equipment designed to deliver measurable performance improvements to crude oil pipelines.
BioLargo delivers sustainable technology-based products that help solve problems threatening the world's supply of water, food, agriculture, healthcare and energy.
Cyclone Power Technologies is a research and development engineering company developing a heat regenerative steam engine.
Gevo is a renewable chemicals and advanced biofuels company.
TES are multi-award winning environmental engineering experts specialising in water purification, water recycling, power conservation and distribution.