Abstract

This paper deal in the regressive analysis on the basis of fluorine content of supply water and morbidity of enamel fluorosis. The morbidity sharp increased with increase of the fluorine content in the range of 0.4-1.0 mg/l. Furthermore, the relationship between the prevalence rate of skeletal fluorosis and the [fluorine] content became linear regression, so that the safe threshold values of fluorine content in supply water are regarded as less than 0.5 mg/l, it seems better.

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