 It was resumed only in the Fangcun district of the city, due to objections, and was halted in 1983.The fluoridation reduced the number of cavities, but increased dental fluorosis; the fluoride levels could have been set too high, and low-quality equipment led to inconsistent, and often excessive, fluoride concentrations.All Hong Kong residents receive natural occurring fluoride in water, at about half the traditionally-recommended fluoride level.