American Water Works (AWK) has announced that its unit, Illinois American Water, completed the construction of a groundwater treatment plant last month. The company invested $10.9 million to construct the groundwater treatment plant on the site of the original water treatment plant, which utilized the Ohio River as the source of water supply. Switching to groundwater is in the customers’ best interest, as approved by the U.S. Environmental Protection Agency (“EPA”), Illinois EPA and Illinois Commerce Commis ...