Abstract: The concentration of fluorine in water, soil, fuel, food, vegetable and tea in Tibetan habitats with different environmental characteristic were measured by ion specific electrode potentiometer.The results showed that the fluorine concentration in water, soil, fuel, food vegetable,butter tea and Zanba both of them were made from brick teas was 0.06 mg·L^-1, 0.45mg·kg^-1, 0.10mg·kg^-1,0.06～0.33mg·kg^-1,3.09mg·L^-1 and 3.61mg·kg^-1,respectively. The water soluble fluorine content in brick tea which came from Sichuan and Yunnan Provinces reached up to 533.89～617.32 mg·kg^-1. It is suggested that drinking brick tea may induce fluorosis in Tibetan habitats.

Key words: Tibet, Environment, Fluorine, Tea