The WTP receives its water from the Tar River, which is classified as a surface water supply. Additionally, eight area deep wells supplement the surface water supply.
Water from the Tar River is pumped into a 63-million-gallon pre-settling reservoir where large, heavy dirt particles begin to settle out as the water slowly moves to the outlet of the reservoir.
The water then flows to the plant where a coagulant (chemical to help smaller dirt particles come together to form larger particles called floc) is added.
The water then passes through a series of mixers, called flocculators, designed to help the formation of floc. After the mixers, the water slows to a snail’s pace as it enters the sedimentation basins. As it passes through the basins, about 95% of the floc settles to the bottom.
The cleaner water from the top of the sedimentation basin is then channeled to tanks where it is ozonated. This part of the process is called primary disinfection. Harmful bacteria, germs, viruses and microorganisms are killed or inactivated by this process.
Next, the water is filtered so that a majority of the remaining particles are removed. Additional chemical treatment happens next. Fluoride is added to help prevent tooth decay, sodium hydroxide is added to increase pH, phosphate is added for corrosion control, and chlorine and ammonia are added to form chloramines, which function as the secondary disinfection in the distribution syste
Finished water is then pumped into two, three-million-gallon ground storage tanks and into the distribution system, which includes our customers’ homes and businesses as well as two elevated tanks.