Chloramine Conversion – January 23, 2023

Due to a clerical error, a previous letter sent to your residence of Fort Bend County WCID 3 stated the conversion would begin earlier. Please disregard that letter.

On January 23, 2023, the Fort Bend County WCID 3 (TX0790368) 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.

If you have any questions reach out the compliance department at 281-367-5511 or

Koby K. Boman, P.E.
Supervising Engineer
Compliance Team
Municipal Operations and Consulting