Ion Exchange is a water and environmental management company. It provides water treatment, liquid waste treatment and recycling, air pollution control, solid and hazardous waste management, and the generation of energy from waste. It also offers products and solutions to treat water, waste water, solid waste, and air, meeting the requirements of industries. It was founded in 1964 and is based in Mumbai, India.

CDD Society is a not-for-profit organization. It innovates, demonstrates, and disseminates decentralized nature-based solutions for the conservation, collection, treatment, and reuse of water resources and the management of sanitation facilities. Its services include technical solutions, capacity building, applied research, and knowledge publication dissemination. It serves the wastewater treatment, fecal sludge management, waterbody rejuvenation, and solid waste management sectors. It was founded in 2005 and is based in Bengaluru, India.

Indra focuses on the treatment of wastewater and the purification of industrial and chemical effluents by using advanced automation and analytics.

ECOSTP is a collective of global waste water consultants with deep expertise in solutions in sewage treatment. The ECOSTP technology offers a state of the art solution for on-site sewage treatment taking maximum advantage of natural processes to achieve a reliable and eco-friendly system. The technology works independent from power supply and daily surveillance, treating the sewage.