Illinois American Water Switch Over - August 8, 2022


O’Fallon, Illinois On August 8th, 2022, Illinois American Water will temporary be switching treatment to a form of chlorine known as “free chlorine,” which does not contain ammonia. This change is part of a project to install Ultraviolet Disinfection (UV) at Illinois American Water’s Water Treatment Plant located near East St. Louis.  Chlorine is commonly used in public water systems as a disinfectant and is monitored closely by our water quality professionals.

During the temporary treatment change, customers may experience a more noticeable chlorine taste or odor in their water. There is no reason for concern. This is due to the switch in chlorine types. Institutions with additional water purification filters for special needs, for instance hospitals and dialysis centers, have been contacted about this work and are aware of the treatment change. Anyone with questions about home health care equipment should reach out to their health-care provider.

The City of O’Fallon buys treated water wholesale from the private company, Illinois American Water, and then pumps it to all water customers. Therefore, Illinois American Water will be treating the water prior to its delivery to the City of O’Fallon’s pumping station.

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For more information please contact Grant Litteken at 618-624-4500 or email at [email protected].