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Johnston
Pump Station pumps raw water from Floods Pond. A small amount of
chlorine is added at Johnston to disinfect water as it travels
approximately one mile to the Butler Ozone Treatment Facility. At the
treatment facility, ozone (a strong disinfectant) is added to the water
in the contact basins. Because ozone dissipates in minutes,
chloramines (a combination of chlorine and ammonia) is added as a
secondary disinfectant to prevent regrowth of bacteria in the
distribution system. Soda ash and fluoride are also added in the
chemical injection chamber. Soda ash is added to help prevent corrosion
of piping materials, and fluoride is added to help prevent dental
carries. The purpose of the surge tank is to help stabilize pressure in
the distribution system. From the Ozone Plant, water travels by gravity
to the distribution system. |
