GENEZA I ROZPRZESTRZENIENIE WÓD Z WYSOKĄ ZAWARTOŚCIĄ FLUORU W GZWP NR 338 PACZKÓW–NIEMODLIN

Abstract

ORIGIN AND DISTRIBUTION OF HIGH FLUORIDE CONTENT WATER IN THE MGWB No 338 PACZKÓW–NIEMODLINAbstract.The problem of fluoride in drinking water is currently the subject of study of many research centres in the world, because not only deficit of fluorine (below 0.8 mg/l), which causes teeth caries, but also its excess (above 1.5 mg/l), which may cause fluorosis and osteoporosis, are harmful to human being. A hydrogeochemical study conducted in the Upper Silesian Branch of the PGI lead to detailed recognition of hydrogeological and chemical conditions as well as the extent of fluoride anomaly in Neogene aquifer water in the Paczków–Niemodlin basin. The fluoride content in groundwater of the basin is high and ranges from 6.0 to 11.5 mg/l, exceeding about 10 times the permissible values for drinking water. The highest concentrations of fluoride are observed in the Nysa region. The investigations confirmed the increase of fluoride content with decreasing altitude of the aquifer top. The highest concentrations are found in the aquifer whose top is situated at 30–80 m a.s.l.