With a couple of computer clicks in the control room of the A.H. Weeks Water Treatment Plant in East Windsor, more than 50 years of adding fluoride to the city’s water supply to fight cavities ended Monday afternoon.

“Out of Service” blinked in red on a digital screen as Wayne White, production supervisor with the Enwin water division, stopped the flow of hydrofluorosilicic acid into the water system.

Within days, a week at the most, the last remnants of fluoride should be gone from the water flowing from taps in Windsor, LaSalle and Tecumseh, city water officials say.

“If you haven’t been brushing, it’s probably a good time to start,” Garry Rossi, the city’s director of water production, said as the flow of hydrofluorosilicic acid was shut off at 4:05 p.m.

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