Every spring, some Denison residents notice their tap water smells or tastes a little different. There is a simple reason for it, and it comes down to how the city disinfects its water.
Chloramine most of the year, free chlorine in the spring
The City of Denison normally uses chloramine, a combination of chlorine and ammonia, to disinfect its drinking water. For a few weeks each year, it temporarily switches to free chlorine as part of routine maintenance. In 2026, the switch ran from April 14 through May 12.
The city says the goal is to keep disinfectant levels steady across the water system ahead of the hot months. During the switch, crews flush hydrants more often and increase water testing.
What you might notice
- A stronger chlorine or pool-like smell
- A change in taste, especially in drinking water and ice
- A slight change in how the water looks during hydrant flushing
City officials have said these changes are normal and that the water is safe to drink. If you have concerns about your water during this time, contact the city’s Public Works Department.
If taste and odor bother you
Disinfection is an important part of keeping public water safe, but you do not have to live with the taste or smell at your own tap. A few options can help:
- Reverse osmosis: A reverse osmosis system under the sink treats the water you drink and cook with.
- Whole house filtration: A whole house system treats water at every faucet and shower. Chloramine can be harder to remove than chlorine, so make sure any filter you choose is designed to handle it.
A water softener is a different tool. It handles hardness, which is a separate issue in Denison, but it will not remove chlorine or chloramine.
Find out what your home needs
Culligan of Denison serves Denison, Sherman, Durant and the surrounding area. Our local team can test your water at your home for free and explain your options. Schedule your free water consultation.
