Illinois American Water Completes Major Improvements, Enhancements to Regional Water Treatment Plant Near East St. Louis

Since 2019, $157 million has been invested in major upgrades and enhancements to the Metro East regional water treatment plant that focus on service reliability, water quality and operational efficiencies, while incorporating state-of-the-art environmental technology. BELLEVILLE, Ill., Dec. 9, 2025 /PRNewswire/ -- In 2025, Illinois American Water's Interurban (Metro East) District completed the final stages of significant upgrades and enhancements to its historic water treatment plant on the Mississippi Riv ...