The annual "free chlorine" and main-hydrant flush programs are underway in Alton and Godfrey.  Illinois American Water conducts the maintenance programs on an annual basis to ensure reliable delivery of water to area homes and businesses.  Areas affected by the flushing will be notified with signange.

Illinois American Water spokesperson Karen Cotton:

Cotton comments

She says during this time the company will switch to a form of chlorine known as "free chlorine" which does not contain ammonia.  This stronger disinfectant is typically used when flushing water mains.

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