Notice of Conversion to Chloramine Disinfection

Dear Customer,

Cypress Creek Utility District (“District”) will soon be converting its water source from ground water to surface water. This surface water is supplied by the North Harris County Regional Water Authority (“NHCRWA”) from Lake Houston. In order to receive this surface water, the District must change the way it disinfects our water. Currently the District uses chlorine for disinfection and will be switching to chloramines for disinfection. For this change, the Texas Commission on Environmental Quality (“TCEQ”) requires the District to provide each customer with the notification on the reverse side of this letter.

NHCRWA advises homeowners who have water softeners to bypass their systems to prevent adverse impacts on plumbing and water quality due to the change in water quality of surface water.

We welcome your questions and / or comments. Please visit our web page ( and sign up for the latest District information.

Cypress Creek Utility District Board of Directors

Notice of Conversion to Chloramine Disinfection

On May 16, 2022, the Cypress Creek Utility District will be changing the disinfectant that we use from chlorine to chloramines. This change is intended to benefit our customers by reducing the levels of disinfection byproducts (DBPs) in the system, while still providing protection from waterborne disease.

However, the change to chloramines can cause problems to persons dependent on dialysis machines. A condition known as hemolytic anemia can occur if the disinfectant is not completely removed from the water that is used for the dialysate. Consequently, the pretreatment scheme used for the dialysis units must include some means, such as a charcoal filter, for removing the chloramine prior to this date. Medical facilities should also determine if additional precautions are required for other medical equipment.

In addition, chloraminated water may be toxic to fish. If you have a fish tank, please make sure that the chemicals or filters that you are using are designed for use in water that has been treated with chloramines. You may also need to change the type of filter that you use for the fish tank.