ALTON — On Monday, Sept. 7, 2026, Illinois American Water will begin its annual maintenance program in the Alton water system that includes testing and flushing fire hydrants in addition to a temporary change in water treatment. This annual maintenance work supports continued delivery of water and fire protection to homes and businesses. The maintenance program will continue through Oct. 5.WATER MAIN AND FIRE HYDRANT FLUSHINGFlushing the water s…