NGL Energy Partners LP, through its subsidiaries, engages in the crude oil logistics, water solutions, liquids, retail propane, and refined products and renewables businesses in the United States. The Crude Oil Logistics segment purchases crude oil from producers and transports it for resale at pipeline injection points, storage terminals, barge loading facilities, rail facilities, refineries, and other trade hubs. The Water Solutions segment is involved in the treatment and disposal of wastewater generated from crude oil and natural gas production operations; sale of recycled water and recovered hydrocarbons; and disposal of solids, such as tank bottoms and drilling fluids. The Liquids segment supplies propane, butane, and natural gas liquids to retailers, wholesalers, refiners, and petrochemical plants in the United States and Canada. This segment also provides natural gas liquids terminaling services through its 21 terminals in the United States; and rail car transportation services through its fleet of leased rail cars. The Retail Propane segment sells propane, distillates, and equipment to end users consisting of residential, agricultural, commercial, and industrial customers, as well as re-sellers. The Refined Products and Renewables segment markets gasoline, diesel, ethanol, and biodiesel products; refined products terminaling services; and own refined products storage facilities. NGL Energy Holdings LLC serves as the general partner of the company. The company was founded in 1940 and is headquartered in Tulsa, Oklahoma.