American Water Works Co Inc — American Water Works Company, Inc., through its subsidiaries, provides water and wastewater services in the United States. It offers water and wastewater services on military installations; and undertakes contracts with municipal customers, primarily to operate and manage water and wastewater facilities, as well as offers other related services. The company also operates approximately 80 surface water treatment plants; 520 groundwater treatment plants; 170 wastewater treatment plants; 55,000 miles of transmission, distribution, and collection mains and pipes; 1,200 groundwater wells; 1,800 wat….· via yahoo