Reliance Group is India's largest private sector enterprise with businesses spanning exploration and production of oil and gas, petroleum refining and marketing, petrochemicals (polyester, fiber intermediates, plastics and chemicals), textiles, retail and special economic zones. Reliance Industries Limited (RIL), the flagship company, is a Fortune Global 500 company and is the largest private sector company in India.
RIL's Jamnagar Refinery Works is the biggest grassroot refinery in the world. The refinery's main source of water is the product water produced from seawater by thermal desalination units. This makes water very precious in the facility, and Reliance has a major focus on recycle and reuse of various effluents produced in the refinery.