GRAL 7 1 * TEXAS CITY OF GRAHAM PUBLIC NOTICE CHANGE TO DISINFECTANT USED FOR WATER TREATMENT The City of Graham public water system, (PWS) ID 2520001, will temporarily convert the disinfectant used in the distribution system from chloramine to free chlorine. The conversion will begin on June 25, 2025, and continue through July 16, 2025. During this period, you may experience taste and odor changes associated with this type of temporary disinfectant conversion. Public water systems are required to properly disinfect their water and maintain an adequate disinfectant residual in the distribution system. Chloramine, free chlorine combined with ammonia, is widely used as a disinfectant because it persists for long periods while also limiting the formation of disinfection by-product contaminants. Prolonged use of chloramine coupled with other factors that can affect water quality, such as high temperatures or stagnation of water, may result in the growth and/or persistence of organic matter within the pipes of the distribution system, which may hinder the ability to maintain an adequate disinfectant residual. A temporary conversion to free chlorine, partnered with flushing activities, helps to rid distribution pipes of this organic matter and improve the quality of your water overall. The City of Graham has chosen to implement a temporary disinfectant conversion to free chlorine based on the following: Declining disinfection residuals at the ends of the water distribution system. For questions regarding this Notice, please contact City of Graham Public Works Director Randall Dawson at 940-549-3322. I, the Undersigned Authority, do hereby certify that the above Public Notice is a true and correct copy of said Notice posted at the City of Graham, Texas, at a place convenient and readily accessible to the general public at all times. lon Witness my, hand, and seal of the City of Graham this day of June 2025, at 3 3Dum and remained SO posted continuously until July 17, 2025. City ofGraham By: Varet Bueno Marci Bueno, City Secretary