Research results of fluorine accumulation in fallow deers bones in Western Pomerania were presented. Fluorine contents denotation was made by potentiometer method with ioneselective elektrode use. Dependence of fluorine accumulation on age and individual features of animals, regions properties of investigated area and distances from emission sources of fluorine compounds were examined. Dependences characteristic for probabilistic variables were obtained. For measurements results description were used neural networks MLP, RBP, GRNN.