Chlorine Conversion begins Monday, March 9th

Beginning Monday, March 9, 2026, the City of Hays will temporarily convert the disinfectant used in the distribution system from chloramine to free chlorine. According to the City’s March 5th announcement, residents may experience taste and odor changes associated with this type of temporary disinfectant conversion. The conversion is expected to continue through May 11, 2026.

The City’s announcement also states that 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 longer periods while also limiting the formation of disinfection by-product contaminants. Prolonged use of chloramine coupled with other factors that can impact water quality, such as high temperatures or reduced usage 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. The Hays Fire Department is conducting their annual testing of hydrants at the same time to rid distribution pipes of this organic matter and improve the quality of water overall.

The Hays Water Resource Department asks residents to share this information, especially with others who drink water and who may not have received the City’s announcement directly.

If you have questions regarding this matter, please contact the Water Resources Department at 785-628-7380.