$280 million invested in Illinois water, wastewater infrastructure upgrades in 2025
Illinois American Water invested more than $280 million in 2025 to upgrade and modernize water and wastewater infrastructure across its statewide service territory, continuing a multiyear capital improvement program focused on reliability, resiliency and regulatory compliance.
The utility’s capital program included improvements to treatment plants, pump stations, storage tanks, pipelines and metering systems. Major projects included water treatment plant upgrades in East St. Louis, Peoria and Streator; wastewater lagoon improvements in Godfrey; and rehabilitation of collection systems in communities including Homer Township and Rosiclare.
Systemwide, the company invested more than $50 million in water main installation, replacement and rehabilitation, totaling approximately 40 miles of pipe, along with $13.7 million for sanitary sewer collection main rehabilitation. Wastewater treatment facility upgrades exceeded $77 million, including filter installations, chemical feed system improvements and operational safety enhancements.
Additional infrastructure initiatives included a $27 million investment in lead and galvanized service line replacement, inspection of more than 15,800 service lines and replacement of 1,560 lines statewide. The company also replaced 573 fire hydrants and 724 valves as part of distribution system reliability efforts.
Illinois American Water said it has invested nearly $2.5 billion in infrastructure improvements across the state since 2013, reflecting ongoing efforts to replace aging underground assets and strengthen long-term water and wastewater system performance.
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