Lake Mary

Chemical Dosing Pump Assists in Arsenic Removal in Groundwater Wells

Oct. 13, 2022
Arsenic is present in the well water of this popular resort town located high in the Sierra Mountains. It was imperative the Water District install a system that would successfully remove the arsenic and render the water safe for human consumption.

The Water District utilizes Sodium Hypochlorite (NaClO) and Ferric Chloride (FeCL3) in a multi-step arsenic removal process. Injection of these chemicals into the raw groundwater transforms the arsenic molecules into a precipitate which can then be filtered out of the water.

Originally, the Well Stations utilized Solenoid Style pumps but discovered that the off-gassing nature of liquid NaClO caused these pumps to vapor lock, which interrupted the chemical feed process until they were serviced.

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