EN
The fluoride content in drinking water and hen ankle bones of 48 localities in northern and central Poland was determined. The mean fluoride concentration in water was 0.1 - 0.4 mg/1, in bones 0.4 - 0.6 mg/g. An insignificat correlation between the fluoride content in hen bones and drinking water was found in this study. Hen bones are not well suited for use as a bioindicator for assessment of environmental fluoride pollution.