American Water Works Company, Inc. is a water supplier and wastewater service provider. American Water Works operates a large water and wastewater infrastructure to efficiently serve the expanding customer base in the United States. It operates surface water treatment plants; groundwater treatment plants; wastewater treatment plants; miles of transmission, distribution, and collection mains and pipes; groundwater wells; water and wastewater pumping stations; treated water storage facilities; as well as dams. American Water Works Company primarily operates through the Regulated Businesses segment.