Water Disinfection Process

Temporary Changes in Water Disinfection Method Mar 1-Apr 1

Fuquay-Varina residents may notice a slight change in the taste and color of their water during the month of March.  Beginning Wednesday, March 1, 2017 Harnett County Public Utilities and Johnston County Public Utilities will temporarily change its drinking water disinfection from Chloramines (Free Chlorine plus Ammonia) to just Free Chlorine by stopping the addition of ammonia to its water treatment disinfection process. This change is a requirement by North Carolina Public Water Supply Section, which governs the operation of the County’s water system. They will resume the addition of ammonia to form Chloramines for the water treatment disinfection process on Saturday, April 1, 2017.

Using ammonia in the treatment process helps reduce the amount of Trihalomethanes and Haloacetic Acids, by-products formed when water is disinfected with chlorine. This little over four week return to chlorine only disinfection is not expected to cause any significant increase in Trihalomethanes or Haloacetic Acids. Trihalomethanes and Haloacetic Acid levels are strictly regulated in the drinking water industry, and the County has maintained compliance with all limits on Trihalomethanes and Haloacetic Acids since regulations were put in place.

Some users of water may be affected by the temporary change in the treatment process. Water customers should be aware that residual traces of ammonia and chlorine must be removed from the water prior to its use in fish aquariums and ponds, kidney dialysis and some commercial manufacturing of food and beverage.

Both Counties also conducts flushing of the water distribution system during this period to hasten the change of chloramines to chlorine residual disinfectant. The system flushing may result in some minor discoloration of the County’s water.

If you have any questions about this temporary change in the water treatment process, contact Public Utilities at pu@fuquay-varina.org.